diff --git a/python/mozbuild/mozbuild/gn_processor.py b/python/mozbuild/mozbuild/gn_processor.py
index b10ef806a02c..06e325a2f372 100644
--- a/python/mozbuild/mozbuild/gn_processor.py
+++ b/python/mozbuild/mozbuild/gn_processor.py
@@ -656,10 +656,12 @@ def main():
             target_cpus = ["x64"]
             if target_os in ("android", "linux", "mac", "win"):
                 target_cpus.append("arm64")
-            if target_os == "android":
+            if target_os in ("android", "linux"):
                 target_cpus.append("arm")
             if target_os in ("android", "linux", "win"):
                 target_cpus.append("x86")
+            if target_os == "linux":
+                target_cpus.append("ppc64")
             for target_cpu in target_cpus:
                 vars = {
                     "host_cpu": "x64",
diff --git a/third_party/libwebrtc/api/adaptation/resource_adaptation_api_gn/moz.build b/third_party/libwebrtc/api/adaptation/resource_adaptation_api_gn/moz.build
index e1ac50b79f1d..445f027e82b0 100644
--- a/third_party/libwebrtc/api/adaptation/resource_adaptation_api_gn/moz.build
+++ b/third_party/libwebrtc/api/adaptation/resource_adaptation_api_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("resource_adaptation_api_gn")
diff --git a/third_party/libwebrtc/api/array_view_gn/moz.build b/third_party/libwebrtc/api/array_view_gn/moz.build
index e37d93112ffd..0ae35513c8c6 100644
--- a/third_party/libwebrtc/api/array_view_gn/moz.build
+++ b/third_party/libwebrtc/api/array_view_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -128,11 +127,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -157,10 +151,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("array_view_gn")
diff --git a/third_party/libwebrtc/api/audio/aec3_config_gn/moz.build b/third_party/libwebrtc/api/audio/aec3_config_gn/moz.build
index ccb4e054b363..fd8b99d9255f 100644
--- a/third_party/libwebrtc/api/audio/aec3_config_gn/moz.build
+++ b/third_party/libwebrtc/api/audio/aec3_config_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("aec3_config_gn")
diff --git a/third_party/libwebrtc/api/audio/aec3_factory_gn/moz.build b/third_party/libwebrtc/api/audio/aec3_factory_gn/moz.build
index f7894b919aa6..c60ef9015b87 100644
--- a/third_party/libwebrtc/api/audio/aec3_factory_gn/moz.build
+++ b/third_party/libwebrtc/api/audio/aec3_factory_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -148,11 +147,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -177,6 +171,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -187,10 +188,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("aec3_factory_gn")
diff --git a/third_party/libwebrtc/api/audio/audio_frame_api_gn/moz.build b/third_party/libwebrtc/api/audio/audio_frame_api_gn/moz.build
index c64488d96c2c..ca213acc75c3 100644
--- a/third_party/libwebrtc/api/audio/audio_frame_api_gn/moz.build
+++ b/third_party/libwebrtc/api/audio/audio_frame_api_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -141,11 +140,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -170,6 +164,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -180,10 +181,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_frame_api_gn")
diff --git a/third_party/libwebrtc/api/audio/audio_mixer_api_gn/moz.build b/third_party/libwebrtc/api/audio/audio_mixer_api_gn/moz.build
index 2d2ff9a90960..5da87da932c5 100644
--- a/third_party/libwebrtc/api/audio/audio_mixer_api_gn/moz.build
+++ b/third_party/libwebrtc/api/audio/audio_mixer_api_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -132,11 +131,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -161,10 +155,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_mixer_api_gn")
diff --git a/third_party/libwebrtc/api/audio/echo_control_gn/moz.build b/third_party/libwebrtc/api/audio/echo_control_gn/moz.build
index 70d959ac5cb7..a5b0fc942700 100644
--- a/third_party/libwebrtc/api/audio/echo_control_gn/moz.build
+++ b/third_party/libwebrtc/api/audio/echo_control_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -128,11 +127,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -157,10 +151,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("echo_control_gn")
diff --git a/third_party/libwebrtc/api/audio_codecs/L16/audio_decoder_L16_gn/moz.build b/third_party/libwebrtc/api/audio_codecs/L16/audio_decoder_L16_gn/moz.build
index a53f93bb78fd..7864e79b32ff 100644
--- a/third_party/libwebrtc/api/audio_codecs/L16/audio_decoder_L16_gn/moz.build
+++ b/third_party/libwebrtc/api/audio_codecs/L16/audio_decoder_L16_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_decoder_L16_gn")
diff --git a/third_party/libwebrtc/api/audio_codecs/L16/audio_encoder_L16_gn/moz.build b/third_party/libwebrtc/api/audio_codecs/L16/audio_encoder_L16_gn/moz.build
index d14da8be7b0c..d5a7bad12a54 100644
--- a/third_party/libwebrtc/api/audio_codecs/L16/audio_encoder_L16_gn/moz.build
+++ b/third_party/libwebrtc/api/audio_codecs/L16/audio_encoder_L16_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_encoder_L16_gn")
diff --git a/third_party/libwebrtc/api/audio_codecs/audio_codecs_api_gn/moz.build b/third_party/libwebrtc/api/audio_codecs/audio_codecs_api_gn/moz.build
index ad8721a80af4..11d2da68af0a 100644
--- a/third_party/libwebrtc/api/audio_codecs/audio_codecs_api_gn/moz.build
+++ b/third_party/libwebrtc/api/audio_codecs/audio_codecs_api_gn/moz.build
@@ -80,7 +80,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -143,11 +142,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -172,6 +166,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -182,10 +183,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_codecs_api_gn")
diff --git a/third_party/libwebrtc/api/audio_codecs/builtin_audio_decoder_factory_gn/moz.build b/third_party/libwebrtc/api/audio_codecs/builtin_audio_decoder_factory_gn/moz.build
index 02ed07459924..958e41ad74b0 100644
--- a/third_party/libwebrtc/api/audio_codecs/builtin_audio_decoder_factory_gn/moz.build
+++ b/third_party/libwebrtc/api/audio_codecs/builtin_audio_decoder_factory_gn/moz.build
@@ -80,17 +80,13 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["USE_UDEV"] = True
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
-    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FIX"] = "0"
-    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FLOAT"] = "1"
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
     DEFINES["__STDC_FORMAT_MACROS"] = True
 
     OS_LIBS += [
-        "m",
         "rt"
     ]
 
@@ -160,9 +156,13 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_USE_BUILTIN_ISAC_FIX"] = "1"
     DEFINES["WEBRTC_USE_BUILTIN_ISAC_FLOAT"] = "0"
 
+if CONFIG["CPU_ARCH"] == "ppc64":
+
+    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FIX"] = "0"
+    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FLOAT"] = "1"
+
     OS_LIBS += [
-        "android_support",
-        "unwind"
+        "m"
     ]
 
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
@@ -194,6 +194,13 @@ if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Android":
     DEFINES["WEBRTC_USE_BUILTIN_ISAC_FIX"] = "0"
     DEFINES["WEBRTC_USE_BUILTIN_ISAC_FLOAT"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -212,10 +219,42 @@ if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Android":
     DEFINES["WEBRTC_USE_BUILTIN_ISAC_FIX"] = "0"
     DEFINES["WEBRTC_USE_BUILTIN_ISAC_FLOAT"] = "1"
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FIX"] = "0"
+    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FLOAT"] = "1"
+    DEFINES["_GNU_SOURCE"] = True
+
+    OS_LIBS += [
+        "m"
+    ]
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FIX"] = "0"
+    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FLOAT"] = "1"
+    DEFINES["_GNU_SOURCE"] = True
+
+    OS_LIBS += [
+        "m"
+    ]
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FIX"] = "0"
+    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FLOAT"] = "1"
+    DEFINES["_GNU_SOURCE"] = True
+
+    OS_LIBS += [
+        "m"
+    ]
+
 Library("builtin_audio_decoder_factory_gn")
diff --git a/third_party/libwebrtc/api/audio_codecs/builtin_audio_encoder_factory_gn/moz.build b/third_party/libwebrtc/api/audio_codecs/builtin_audio_encoder_factory_gn/moz.build
index 621fa14dbad4..7f38bd927a31 100644
--- a/third_party/libwebrtc/api/audio_codecs/builtin_audio_encoder_factory_gn/moz.build
+++ b/third_party/libwebrtc/api/audio_codecs/builtin_audio_encoder_factory_gn/moz.build
@@ -80,17 +80,13 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["USE_UDEV"] = True
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
-    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FIX"] = "0"
-    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FLOAT"] = "1"
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
     DEFINES["__STDC_FORMAT_MACROS"] = True
 
     OS_LIBS += [
-        "m",
         "rt"
     ]
 
@@ -160,9 +156,13 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_USE_BUILTIN_ISAC_FIX"] = "1"
     DEFINES["WEBRTC_USE_BUILTIN_ISAC_FLOAT"] = "0"
 
+if CONFIG["CPU_ARCH"] == "ppc64":
+
+    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FIX"] = "0"
+    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FLOAT"] = "1"
+
     OS_LIBS += [
-        "android_support",
-        "unwind"
+        "m"
     ]
 
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
@@ -194,6 +194,13 @@ if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Android":
     DEFINES["WEBRTC_USE_BUILTIN_ISAC_FIX"] = "0"
     DEFINES["WEBRTC_USE_BUILTIN_ISAC_FLOAT"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -212,10 +219,42 @@ if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Android":
     DEFINES["WEBRTC_USE_BUILTIN_ISAC_FIX"] = "0"
     DEFINES["WEBRTC_USE_BUILTIN_ISAC_FLOAT"] = "1"
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FIX"] = "0"
+    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FLOAT"] = "1"
+    DEFINES["_GNU_SOURCE"] = True
+
+    OS_LIBS += [
+        "m"
+    ]
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FIX"] = "0"
+    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FLOAT"] = "1"
+    DEFINES["_GNU_SOURCE"] = True
+
+    OS_LIBS += [
+        "m"
+    ]
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FIX"] = "0"
+    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FLOAT"] = "1"
+    DEFINES["_GNU_SOURCE"] = True
+
+    OS_LIBS += [
+        "m"
+    ]
+
 Library("builtin_audio_encoder_factory_gn")
diff --git a/third_party/libwebrtc/api/audio_codecs/g711/audio_decoder_g711_gn/moz.build b/third_party/libwebrtc/api/audio_codecs/g711/audio_decoder_g711_gn/moz.build
index e21ae152d13b..497c53b37e51 100644
--- a/third_party/libwebrtc/api/audio_codecs/g711/audio_decoder_g711_gn/moz.build
+++ b/third_party/libwebrtc/api/audio_codecs/g711/audio_decoder_g711_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_decoder_g711_gn")
diff --git a/third_party/libwebrtc/api/audio_codecs/g711/audio_encoder_g711_gn/moz.build b/third_party/libwebrtc/api/audio_codecs/g711/audio_encoder_g711_gn/moz.build
index 278d306b96dd..eebd82c6c4ce 100644
--- a/third_party/libwebrtc/api/audio_codecs/g711/audio_encoder_g711_gn/moz.build
+++ b/third_party/libwebrtc/api/audio_codecs/g711/audio_encoder_g711_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_encoder_g711_gn")
diff --git a/third_party/libwebrtc/api/audio_codecs/g722/audio_decoder_g722_gn/moz.build b/third_party/libwebrtc/api/audio_codecs/g722/audio_decoder_g722_gn/moz.build
index 3af448ae4966..f5a808a4a891 100644
--- a/third_party/libwebrtc/api/audio_codecs/g722/audio_decoder_g722_gn/moz.build
+++ b/third_party/libwebrtc/api/audio_codecs/g722/audio_decoder_g722_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_decoder_g722_gn")
diff --git a/third_party/libwebrtc/api/audio_codecs/g722/audio_encoder_g722_config_gn/moz.build b/third_party/libwebrtc/api/audio_codecs/g722/audio_encoder_g722_config_gn/moz.build
index 04b210f0086b..2e9b5830dab5 100644
--- a/third_party/libwebrtc/api/audio_codecs/g722/audio_encoder_g722_config_gn/moz.build
+++ b/third_party/libwebrtc/api/audio_codecs/g722/audio_encoder_g722_config_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_encoder_g722_config_gn")
diff --git a/third_party/libwebrtc/api/audio_codecs/g722/audio_encoder_g722_gn/moz.build b/third_party/libwebrtc/api/audio_codecs/g722/audio_encoder_g722_gn/moz.build
index face95013b75..4bc77ef9c8c7 100644
--- a/third_party/libwebrtc/api/audio_codecs/g722/audio_encoder_g722_gn/moz.build
+++ b/third_party/libwebrtc/api/audio_codecs/g722/audio_encoder_g722_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_encoder_g722_gn")
diff --git a/third_party/libwebrtc/api/audio_codecs/ilbc/audio_decoder_ilbc_gn/moz.build b/third_party/libwebrtc/api/audio_codecs/ilbc/audio_decoder_ilbc_gn/moz.build
index 03c33a7c626b..51a1be6760b3 100644
--- a/third_party/libwebrtc/api/audio_codecs/ilbc/audio_decoder_ilbc_gn/moz.build
+++ b/third_party/libwebrtc/api/audio_codecs/ilbc/audio_decoder_ilbc_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -147,11 +146,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -176,6 +170,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -186,10 +187,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_decoder_ilbc_gn")
diff --git a/third_party/libwebrtc/api/audio_codecs/ilbc/audio_encoder_ilbc_config_gn/moz.build b/third_party/libwebrtc/api/audio_codecs/ilbc/audio_encoder_ilbc_config_gn/moz.build
index 4297ac3978af..198b82639e50 100644
--- a/third_party/libwebrtc/api/audio_codecs/ilbc/audio_encoder_ilbc_config_gn/moz.build
+++ b/third_party/libwebrtc/api/audio_codecs/ilbc/audio_encoder_ilbc_config_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_encoder_ilbc_config_gn")
diff --git a/third_party/libwebrtc/api/audio_codecs/ilbc/audio_encoder_ilbc_gn/moz.build b/third_party/libwebrtc/api/audio_codecs/ilbc/audio_encoder_ilbc_gn/moz.build
index 0435bf4c4cd2..6b3377177c2b 100644
--- a/third_party/libwebrtc/api/audio_codecs/ilbc/audio_encoder_ilbc_gn/moz.build
+++ b/third_party/libwebrtc/api/audio_codecs/ilbc/audio_encoder_ilbc_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -147,11 +146,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -176,6 +170,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -186,10 +187,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_encoder_ilbc_gn")
diff --git a/third_party/libwebrtc/api/audio_codecs/isac/audio_decoder_isac_fix_gn/moz.build b/third_party/libwebrtc/api/audio_codecs/isac/audio_decoder_isac_fix_gn/moz.build
index 878c0d697eeb..e5ef0c5def0c 100644
--- a/third_party/libwebrtc/api/audio_codecs/isac/audio_decoder_isac_fix_gn/moz.build
+++ b/third_party/libwebrtc/api/audio_codecs/isac/audio_decoder_isac_fix_gn/moz.build
@@ -14,12 +14,7 @@ CXXFLAGS += [
 ]
 
 DEFINES["ABSL_ALLOCATOR_NOTHROW"] = "1"
-DEFINES["ANDROID"] = True
-DEFINES["ANDROID_NDK_VERSION_ROLL"] = "r20_1"
-DEFINES["HAVE_SYS_UIO_H"] = True
 DEFINES["RTC_ENABLE_VP9"] = True
-DEFINES["WEBRTC_ANDROID"] = True
-DEFINES["WEBRTC_ANDROID_OPENSLES"] = True
 DEFINES["WEBRTC_ARCH_ARM"] = True
 DEFINES["WEBRTC_ARCH_ARM_V7"] = True
 DEFINES["WEBRTC_ENABLE_PROTOBUF"] = "0"
@@ -44,12 +39,6 @@ LOCAL_INCLUDES += [
     "/tools/profiler/public"
 ]
 
-OS_LIBS += [
-    "android_support",
-    "log",
-    "unwind"
-]
-
 UNIFIED_SOURCES += [
     "/third_party/libwebrtc/api/audio_codecs/isac/audio_decoder_isac_fix.cc"
 ]
@@ -65,4 +54,37 @@ if CONFIG["MOZ_DEBUG"] == "1":
     DEFINES["DYNAMIC_ANNOTATIONS_ENABLED"] = "1"
     DEFINES["_DEBUG"] = True
 
+if CONFIG["OS_TARGET"] == "Android":
+
+    DEFINES["ANDROID"] = True
+    DEFINES["ANDROID_NDK_VERSION_ROLL"] = "r20_1"
+    DEFINES["HAVE_SYS_UIO_H"] = True
+    DEFINES["WEBRTC_ANDROID"] = True
+    DEFINES["WEBRTC_ANDROID_OPENSLES"] = True
+
+    OS_LIBS += [
+        "android_support",
+        "log",
+        "unwind"
+    ]
+
+if CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["USE_AURA"] = "1"
+    DEFINES["USE_GLIB"] = "1"
+    DEFINES["USE_NSS_CERTS"] = "1"
+    DEFINES["USE_OZONE"] = "1"
+    DEFINES["USE_UDEV"] = True
+    DEFINES["_FILE_OFFSET_BITS"] = "64"
+    DEFINES["_LARGEFILE64_SOURCE"] = True
+    DEFINES["_LARGEFILE_SOURCE"] = True
+
+    OS_LIBS += [
+        "rt"
+    ]
+
+if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["USE_X11"] = "1"
+
 Library("audio_decoder_isac_fix_gn")
diff --git a/third_party/libwebrtc/api/audio_codecs/isac/audio_decoder_isac_float_gn/moz.build b/third_party/libwebrtc/api/audio_codecs/isac/audio_decoder_isac_float_gn/moz.build
index d1c61e1717cb..38ea6122bd04 100644
--- a/third_party/libwebrtc/api/audio_codecs/isac/audio_decoder_isac_float_gn/moz.build
+++ b/third_party/libwebrtc/api/audio_codecs/isac/audio_decoder_isac_float_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -172,10 +171,20 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_decoder_isac_float_gn")
diff --git a/third_party/libwebrtc/api/audio_codecs/isac/audio_decoder_isac_gn/moz.build b/third_party/libwebrtc/api/audio_codecs/isac/audio_decoder_isac_gn/moz.build
index 0159d827a9d2..f4a98698ec36 100644
--- a/third_party/libwebrtc/api/audio_codecs/isac/audio_decoder_isac_gn/moz.build
+++ b/third_party/libwebrtc/api/audio_codecs/isac/audio_decoder_isac_gn/moz.build
@@ -74,17 +74,13 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["USE_UDEV"] = True
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
-    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FIX"] = "0"
-    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FLOAT"] = "1"
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
     DEFINES["__STDC_FORMAT_MACROS"] = True
 
     OS_LIBS += [
-        "m",
         "rt"
     ]
 
@@ -150,9 +146,13 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_USE_BUILTIN_ISAC_FIX"] = "1"
     DEFINES["WEBRTC_USE_BUILTIN_ISAC_FLOAT"] = "0"
 
+if CONFIG["CPU_ARCH"] == "ppc64":
+
+    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FIX"] = "0"
+    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FLOAT"] = "1"
+
     OS_LIBS += [
-        "android_support",
-        "unwind"
+        "m"
     ]
 
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
@@ -184,6 +184,13 @@ if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Android":
     DEFINES["WEBRTC_USE_BUILTIN_ISAC_FIX"] = "0"
     DEFINES["WEBRTC_USE_BUILTIN_ISAC_FLOAT"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["WEBRTC_USE_BUILTIN_ISAC_FIX"] = "0"
@@ -198,4 +205,38 @@ if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Android":
     DEFINES["WEBRTC_USE_BUILTIN_ISAC_FIX"] = "0"
     DEFINES["WEBRTC_USE_BUILTIN_ISAC_FLOAT"] = "1"
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FIX"] = "0"
+    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FLOAT"] = "1"
+    DEFINES["_GNU_SOURCE"] = True
+
+    OS_LIBS += [
+        "m"
+    ]
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FIX"] = "0"
+    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FLOAT"] = "1"
+    DEFINES["_GNU_SOURCE"] = True
+
+    OS_LIBS += [
+        "m"
+    ]
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FIX"] = "0"
+    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FLOAT"] = "1"
+    DEFINES["_GNU_SOURCE"] = True
+
+    OS_LIBS += [
+        "m"
+    ]
+
 Library("audio_decoder_isac_gn")
diff --git a/third_party/libwebrtc/api/audio_codecs/isac/audio_encoder_isac_fix_gn/moz.build b/third_party/libwebrtc/api/audio_codecs/isac/audio_encoder_isac_fix_gn/moz.build
index 26e90ee7077a..500c86db9a97 100644
--- a/third_party/libwebrtc/api/audio_codecs/isac/audio_encoder_isac_fix_gn/moz.build
+++ b/third_party/libwebrtc/api/audio_codecs/isac/audio_encoder_isac_fix_gn/moz.build
@@ -14,12 +14,7 @@ CXXFLAGS += [
 ]
 
 DEFINES["ABSL_ALLOCATOR_NOTHROW"] = "1"
-DEFINES["ANDROID"] = True
-DEFINES["ANDROID_NDK_VERSION_ROLL"] = "r20_1"
-DEFINES["HAVE_SYS_UIO_H"] = True
 DEFINES["RTC_ENABLE_VP9"] = True
-DEFINES["WEBRTC_ANDROID"] = True
-DEFINES["WEBRTC_ANDROID_OPENSLES"] = True
 DEFINES["WEBRTC_ARCH_ARM"] = True
 DEFINES["WEBRTC_ARCH_ARM_V7"] = True
 DEFINES["WEBRTC_ENABLE_PROTOBUF"] = "0"
@@ -44,12 +39,6 @@ LOCAL_INCLUDES += [
     "/tools/profiler/public"
 ]
 
-OS_LIBS += [
-    "android_support",
-    "log",
-    "unwind"
-]
-
 UNIFIED_SOURCES += [
     "/third_party/libwebrtc/api/audio_codecs/isac/audio_encoder_isac_fix.cc"
 ]
@@ -65,4 +54,37 @@ if CONFIG["MOZ_DEBUG"] == "1":
     DEFINES["DYNAMIC_ANNOTATIONS_ENABLED"] = "1"
     DEFINES["_DEBUG"] = True
 
+if CONFIG["OS_TARGET"] == "Android":
+
+    DEFINES["ANDROID"] = True
+    DEFINES["ANDROID_NDK_VERSION_ROLL"] = "r20_1"
+    DEFINES["HAVE_SYS_UIO_H"] = True
+    DEFINES["WEBRTC_ANDROID"] = True
+    DEFINES["WEBRTC_ANDROID_OPENSLES"] = True
+
+    OS_LIBS += [
+        "android_support",
+        "log",
+        "unwind"
+    ]
+
+if CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["USE_AURA"] = "1"
+    DEFINES["USE_GLIB"] = "1"
+    DEFINES["USE_NSS_CERTS"] = "1"
+    DEFINES["USE_OZONE"] = "1"
+    DEFINES["USE_UDEV"] = True
+    DEFINES["_FILE_OFFSET_BITS"] = "64"
+    DEFINES["_LARGEFILE64_SOURCE"] = True
+    DEFINES["_LARGEFILE_SOURCE"] = True
+
+    OS_LIBS += [
+        "rt"
+    ]
+
+if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["USE_X11"] = "1"
+
 Library("audio_encoder_isac_fix_gn")
diff --git a/third_party/libwebrtc/api/audio_codecs/isac/audio_encoder_isac_float_gn/moz.build b/third_party/libwebrtc/api/audio_codecs/isac/audio_encoder_isac_float_gn/moz.build
index bcb74f5f6465..6d73bbf414b9 100644
--- a/third_party/libwebrtc/api/audio_codecs/isac/audio_encoder_isac_float_gn/moz.build
+++ b/third_party/libwebrtc/api/audio_codecs/isac/audio_encoder_isac_float_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -172,10 +171,20 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_encoder_isac_float_gn")
diff --git a/third_party/libwebrtc/api/audio_codecs/isac/audio_encoder_isac_gn/moz.build b/third_party/libwebrtc/api/audio_codecs/isac/audio_encoder_isac_gn/moz.build
index 48205e068e7d..d5ee2a6ba2ed 100644
--- a/third_party/libwebrtc/api/audio_codecs/isac/audio_encoder_isac_gn/moz.build
+++ b/third_party/libwebrtc/api/audio_codecs/isac/audio_encoder_isac_gn/moz.build
@@ -74,17 +74,13 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["USE_UDEV"] = True
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
-    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FIX"] = "0"
-    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FLOAT"] = "1"
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
     DEFINES["__STDC_FORMAT_MACROS"] = True
 
     OS_LIBS += [
-        "m",
         "rt"
     ]
 
@@ -150,9 +146,13 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_USE_BUILTIN_ISAC_FIX"] = "1"
     DEFINES["WEBRTC_USE_BUILTIN_ISAC_FLOAT"] = "0"
 
+if CONFIG["CPU_ARCH"] == "ppc64":
+
+    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FIX"] = "0"
+    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FLOAT"] = "1"
+
     OS_LIBS += [
-        "android_support",
-        "unwind"
+        "m"
     ]
 
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
@@ -184,6 +184,13 @@ if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Android":
     DEFINES["WEBRTC_USE_BUILTIN_ISAC_FIX"] = "0"
     DEFINES["WEBRTC_USE_BUILTIN_ISAC_FLOAT"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["WEBRTC_USE_BUILTIN_ISAC_FIX"] = "0"
@@ -198,4 +205,38 @@ if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Android":
     DEFINES["WEBRTC_USE_BUILTIN_ISAC_FIX"] = "0"
     DEFINES["WEBRTC_USE_BUILTIN_ISAC_FLOAT"] = "1"
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FIX"] = "0"
+    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FLOAT"] = "1"
+    DEFINES["_GNU_SOURCE"] = True
+
+    OS_LIBS += [
+        "m"
+    ]
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FIX"] = "0"
+    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FLOAT"] = "1"
+    DEFINES["_GNU_SOURCE"] = True
+
+    OS_LIBS += [
+        "m"
+    ]
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FIX"] = "0"
+    DEFINES["WEBRTC_USE_BUILTIN_ISAC_FLOAT"] = "1"
+    DEFINES["_GNU_SOURCE"] = True
+
+    OS_LIBS += [
+        "m"
+    ]
+
 Library("audio_encoder_isac_gn")
diff --git a/third_party/libwebrtc/api/audio_codecs/opus/audio_decoder_multiopus_gn/moz.build b/third_party/libwebrtc/api/audio_codecs/opus/audio_decoder_multiopus_gn/moz.build
index 0a726270386a..54b4309abddb 100644
--- a/third_party/libwebrtc/api/audio_codecs/opus/audio_decoder_multiopus_gn/moz.build
+++ b/third_party/libwebrtc/api/audio_codecs/opus/audio_decoder_multiopus_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -141,11 +140,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -170,6 +164,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -180,10 +181,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_decoder_multiopus_gn")
diff --git a/third_party/libwebrtc/api/audio_codecs/opus/audio_decoder_opus_config_gn/moz.build b/third_party/libwebrtc/api/audio_codecs/opus/audio_decoder_opus_config_gn/moz.build
index 533623f13645..5d50deec5de3 100644
--- a/third_party/libwebrtc/api/audio_codecs/opus/audio_decoder_opus_config_gn/moz.build
+++ b/third_party/libwebrtc/api/audio_codecs/opus/audio_decoder_opus_config_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_decoder_opus_config_gn")
diff --git a/third_party/libwebrtc/api/audio_codecs/opus/audio_decoder_opus_gn/moz.build b/third_party/libwebrtc/api/audio_codecs/opus/audio_decoder_opus_gn/moz.build
index 8304b29f9033..ff5dd08dc992 100644
--- a/third_party/libwebrtc/api/audio_codecs/opus/audio_decoder_opus_gn/moz.build
+++ b/third_party/libwebrtc/api/audio_codecs/opus/audio_decoder_opus_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -148,11 +147,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -177,6 +171,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -187,10 +188,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_decoder_opus_gn")
diff --git a/third_party/libwebrtc/api/audio_codecs/opus/audio_encoder_multiopus_gn/moz.build b/third_party/libwebrtc/api/audio_codecs/opus/audio_encoder_multiopus_gn/moz.build
index 351c9d716830..3516af523513 100644
--- a/third_party/libwebrtc/api/audio_codecs/opus/audio_encoder_multiopus_gn/moz.build
+++ b/third_party/libwebrtc/api/audio_codecs/opus/audio_encoder_multiopus_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -141,11 +140,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -170,6 +164,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -180,10 +181,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_encoder_multiopus_gn")
diff --git a/third_party/libwebrtc/api/audio_codecs/opus/audio_encoder_opus_config_gn/moz.build b/third_party/libwebrtc/api/audio_codecs/opus/audio_encoder_opus_config_gn/moz.build
index f9ffef46c400..43d7e5274368 100644
--- a/third_party/libwebrtc/api/audio_codecs/opus/audio_encoder_opus_config_gn/moz.build
+++ b/third_party/libwebrtc/api/audio_codecs/opus/audio_encoder_opus_config_gn/moz.build
@@ -82,7 +82,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -145,11 +144,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -174,6 +168,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -184,10 +185,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_encoder_opus_config_gn")
diff --git a/third_party/libwebrtc/api/audio_codecs/opus/audio_encoder_opus_gn/moz.build b/third_party/libwebrtc/api/audio_codecs/opus/audio_encoder_opus_gn/moz.build
index 3a730ab61c22..330a43703234 100644
--- a/third_party/libwebrtc/api/audio_codecs/opus/audio_encoder_opus_gn/moz.build
+++ b/third_party/libwebrtc/api/audio_codecs/opus/audio_encoder_opus_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -148,11 +147,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -177,6 +171,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -187,10 +188,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_encoder_opus_gn")
diff --git a/third_party/libwebrtc/api/audio_options_api_gn/moz.build b/third_party/libwebrtc/api/audio_options_api_gn/moz.build
index 40551ceb3c49..cc5b5eb5e4a9 100644
--- a/third_party/libwebrtc/api/audio_options_api_gn/moz.build
+++ b/third_party/libwebrtc/api/audio_options_api_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -136,11 +135,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -165,6 +159,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -175,10 +176,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_options_api_gn")
diff --git a/third_party/libwebrtc/api/bitrate_allocation_gn/moz.build b/third_party/libwebrtc/api/bitrate_allocation_gn/moz.build
index d4af93c012c4..380799a4aa02 100644
--- a/third_party/libwebrtc/api/bitrate_allocation_gn/moz.build
+++ b/third_party/libwebrtc/api/bitrate_allocation_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -128,11 +127,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -157,10 +151,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("bitrate_allocation_gn")
diff --git a/third_party/libwebrtc/api/call_api_gn/moz.build b/third_party/libwebrtc/api/call_api_gn/moz.build
index dc2c09977e8f..db4a54575138 100644
--- a/third_party/libwebrtc/api/call_api_gn/moz.build
+++ b/third_party/libwebrtc/api/call_api_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("call_api_gn")
diff --git a/third_party/libwebrtc/api/callfactory_api_gn/moz.build b/third_party/libwebrtc/api/callfactory_api_gn/moz.build
index 024c40140397..9f03f48d1987 100644
--- a/third_party/libwebrtc/api/callfactory_api_gn/moz.build
+++ b/third_party/libwebrtc/api/callfactory_api_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("callfactory_api_gn")
diff --git a/third_party/libwebrtc/api/crypto/frame_decryptor_interface_gn/moz.build b/third_party/libwebrtc/api/crypto/frame_decryptor_interface_gn/moz.build
index e485c3a341ea..c8b24c40a820 100644
--- a/third_party/libwebrtc/api/crypto/frame_decryptor_interface_gn/moz.build
+++ b/third_party/libwebrtc/api/crypto/frame_decryptor_interface_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -128,11 +127,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -157,10 +151,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("frame_decryptor_interface_gn")
diff --git a/third_party/libwebrtc/api/crypto/frame_encryptor_interface_gn/moz.build b/third_party/libwebrtc/api/crypto/frame_encryptor_interface_gn/moz.build
index dc93dd4c6ae3..cdd14e168edc 100644
--- a/third_party/libwebrtc/api/crypto/frame_encryptor_interface_gn/moz.build
+++ b/third_party/libwebrtc/api/crypto/frame_encryptor_interface_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -128,11 +127,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -157,10 +151,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("frame_encryptor_interface_gn")
diff --git a/third_party/libwebrtc/api/crypto/options_gn/moz.build b/third_party/libwebrtc/api/crypto/options_gn/moz.build
index 0aa797121423..fe9930c25f0e 100644
--- a/third_party/libwebrtc/api/crypto/options_gn/moz.build
+++ b/third_party/libwebrtc/api/crypto/options_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -149,11 +148,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -178,6 +172,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -188,10 +189,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("options_gn")
diff --git a/third_party/libwebrtc/api/fec_controller_api_gn/moz.build b/third_party/libwebrtc/api/fec_controller_api_gn/moz.build
index f36c05ad363f..f96ecb9b9e06 100644
--- a/third_party/libwebrtc/api/fec_controller_api_gn/moz.build
+++ b/third_party/libwebrtc/api/fec_controller_api_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("fec_controller_api_gn")
diff --git a/third_party/libwebrtc/api/frame_transformer_interface_gn/moz.build b/third_party/libwebrtc/api/frame_transformer_interface_gn/moz.build
index 75daea61a590..9d7b8c54b3c6 100644
--- a/third_party/libwebrtc/api/frame_transformer_interface_gn/moz.build
+++ b/third_party/libwebrtc/api/frame_transformer_interface_gn/moz.build
@@ -74,7 +74,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -141,11 +140,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -170,10 +164,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("frame_transformer_interface_gn")
diff --git a/third_party/libwebrtc/api/function_view_gn/moz.build b/third_party/libwebrtc/api/function_view_gn/moz.build
index 837aa30ceb86..35033d40cc4f 100644
--- a/third_party/libwebrtc/api/function_view_gn/moz.build
+++ b/third_party/libwebrtc/api/function_view_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -128,11 +127,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -157,10 +151,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("function_view_gn")
diff --git a/third_party/libwebrtc/api/libjingle_logging_api_gn/moz.build b/third_party/libwebrtc/api/libjingle_logging_api_gn/moz.build
index 6e0d982169b3..9c19d3a155dc 100644
--- a/third_party/libwebrtc/api/libjingle_logging_api_gn/moz.build
+++ b/third_party/libwebrtc/api/libjingle_logging_api_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("jingle_logging_api_gn")
diff --git a/third_party/libwebrtc/api/media_stream_interface_gn/moz.build b/third_party/libwebrtc/api/media_stream_interface_gn/moz.build
index 01e4faefe198..e515f1be307f 100644
--- a/third_party/libwebrtc/api/media_stream_interface_gn/moz.build
+++ b/third_party/libwebrtc/api/media_stream_interface_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("media_stream_interface_gn")
diff --git a/third_party/libwebrtc/api/neteq/default_neteq_controller_factory_gn/moz.build b/third_party/libwebrtc/api/neteq/default_neteq_controller_factory_gn/moz.build
index 46a00ee45b1f..c96bd8795362 100644
--- a/third_party/libwebrtc/api/neteq/default_neteq_controller_factory_gn/moz.build
+++ b/third_party/libwebrtc/api/neteq/default_neteq_controller_factory_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -147,11 +146,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -176,6 +170,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -186,10 +187,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("default_neteq_controller_factory_gn")
diff --git a/third_party/libwebrtc/api/neteq/neteq_api_gn/moz.build b/third_party/libwebrtc/api/neteq/neteq_api_gn/moz.build
index ac639ad3405b..a0b4c743fa36 100644
--- a/third_party/libwebrtc/api/neteq/neteq_api_gn/moz.build
+++ b/third_party/libwebrtc/api/neteq/neteq_api_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -147,11 +146,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -176,6 +170,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -186,10 +187,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("neteq_api_gn")
diff --git a/third_party/libwebrtc/api/neteq/neteq_controller_api_gn/moz.build b/third_party/libwebrtc/api/neteq/neteq_controller_api_gn/moz.build
index 6bcea6a0a68b..1dcc194cb033 100644
--- a/third_party/libwebrtc/api/neteq/neteq_controller_api_gn/moz.build
+++ b/third_party/libwebrtc/api/neteq/neteq_controller_api_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -139,11 +138,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -168,10 +162,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("neteq_controller_api_gn")
diff --git a/third_party/libwebrtc/api/neteq/tick_timer_gn/moz.build b/third_party/libwebrtc/api/neteq/tick_timer_gn/moz.build
index ea2633066b28..c89b3bb7a411 100644
--- a/third_party/libwebrtc/api/neteq/tick_timer_gn/moz.build
+++ b/third_party/libwebrtc/api/neteq/tick_timer_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("tick_timer_gn")
diff --git a/third_party/libwebrtc/api/network_state_predictor_api_gn/moz.build b/third_party/libwebrtc/api/network_state_predictor_api_gn/moz.build
index 5b8fa1dfc11b..1e59d2afe971 100644
--- a/third_party/libwebrtc/api/network_state_predictor_api_gn/moz.build
+++ b/third_party/libwebrtc/api/network_state_predictor_api_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("network_state_predictor_api_gn")
diff --git a/third_party/libwebrtc/api/numerics/numerics_gn/moz.build b/third_party/libwebrtc/api/numerics/numerics_gn/moz.build
index 3c4c8e42956d..812e5cd6cdb5 100644
--- a/third_party/libwebrtc/api/numerics/numerics_gn/moz.build
+++ b/third_party/libwebrtc/api/numerics/numerics_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("numerics_gn")
diff --git a/third_party/libwebrtc/api/priority_gn/moz.build b/third_party/libwebrtc/api/priority_gn/moz.build
index 386613bb2470..810e48354b06 100644
--- a/third_party/libwebrtc/api/priority_gn/moz.build
+++ b/third_party/libwebrtc/api/priority_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("priority_gn")
diff --git a/third_party/libwebrtc/api/refcountedbase_gn/moz.build b/third_party/libwebrtc/api/refcountedbase_gn/moz.build
index 398174ec60ca..f2c7d0e1191c 100644
--- a/third_party/libwebrtc/api/refcountedbase_gn/moz.build
+++ b/third_party/libwebrtc/api/refcountedbase_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -132,11 +131,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -161,10 +155,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("refcountedbase_gn")
diff --git a/third_party/libwebrtc/api/rtc_error_gn/moz.build b/third_party/libwebrtc/api/rtc_error_gn/moz.build
index a47983f104e5..a1ae01d70df0 100644
--- a/third_party/libwebrtc/api/rtc_error_gn/moz.build
+++ b/third_party/libwebrtc/api/rtc_error_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rtc_error_gn")
diff --git a/third_party/libwebrtc/api/rtc_event_log/rtc_event_log_gn/moz.build b/third_party/libwebrtc/api/rtc_event_log/rtc_event_log_gn/moz.build
index fb9dad3fa7b6..57ddf1efd92e 100644
--- a/third_party/libwebrtc/api/rtc_event_log/rtc_event_log_gn/moz.build
+++ b/third_party/libwebrtc/api/rtc_event_log/rtc_event_log_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -141,11 +140,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -170,6 +164,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -180,10 +181,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rtc_event_log_gn")
diff --git a/third_party/libwebrtc/api/rtp_headers_gn/moz.build b/third_party/libwebrtc/api/rtp_headers_gn/moz.build
index 5df6b3b6eb8a..9f80ac1ca01b 100644
--- a/third_party/libwebrtc/api/rtp_headers_gn/moz.build
+++ b/third_party/libwebrtc/api/rtp_headers_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rtp_headers_gn")
diff --git a/third_party/libwebrtc/api/rtp_packet_info_gn/moz.build b/third_party/libwebrtc/api/rtp_packet_info_gn/moz.build
index c5263134359d..52eaddda1b31 100644
--- a/third_party/libwebrtc/api/rtp_packet_info_gn/moz.build
+++ b/third_party/libwebrtc/api/rtp_packet_info_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rtp_packet_info_gn")
diff --git a/third_party/libwebrtc/api/rtp_parameters_gn/moz.build b/third_party/libwebrtc/api/rtp_parameters_gn/moz.build
index 22f9439330e4..2961df25af8d 100644
--- a/third_party/libwebrtc/api/rtp_parameters_gn/moz.build
+++ b/third_party/libwebrtc/api/rtp_parameters_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -137,11 +136,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -166,6 +160,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -176,10 +177,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rtp_parameters_gn")
diff --git a/third_party/libwebrtc/api/rtp_transceiver_direction_gn/moz.build b/third_party/libwebrtc/api/rtp_transceiver_direction_gn/moz.build
index 77808db46fa1..286543e6b8d1 100644
--- a/third_party/libwebrtc/api/rtp_transceiver_direction_gn/moz.build
+++ b/third_party/libwebrtc/api/rtp_transceiver_direction_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rtp_transceiver_direction_gn")
diff --git a/third_party/libwebrtc/api/scoped_refptr_gn/moz.build b/third_party/libwebrtc/api/scoped_refptr_gn/moz.build
index 9c4af6876d07..acf366b2f182 100644
--- a/third_party/libwebrtc/api/scoped_refptr_gn/moz.build
+++ b/third_party/libwebrtc/api/scoped_refptr_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("scoped_refptr_gn")
diff --git a/third_party/libwebrtc/api/simulated_network_api_gn/moz.build b/third_party/libwebrtc/api/simulated_network_api_gn/moz.build
index a8f704e0204c..cb130c31a398 100644
--- a/third_party/libwebrtc/api/simulated_network_api_gn/moz.build
+++ b/third_party/libwebrtc/api/simulated_network_api_gn/moz.build
@@ -74,7 +74,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -141,11 +140,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -170,10 +164,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("simulated_network_api_gn")
diff --git a/third_party/libwebrtc/api/task_queue/task_queue_gn/moz.build b/third_party/libwebrtc/api/task_queue/task_queue_gn/moz.build
index 3dc4fd638077..c67f147a275f 100644
--- a/third_party/libwebrtc/api/task_queue/task_queue_gn/moz.build
+++ b/third_party/libwebrtc/api/task_queue/task_queue_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -136,11 +135,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -165,6 +159,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -175,10 +176,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("task_queue_gn")
diff --git a/third_party/libwebrtc/api/transport/bitrate_settings_gn/moz.build b/third_party/libwebrtc/api/transport/bitrate_settings_gn/moz.build
index 7c83b26f0c76..d775439d5ea1 100644
--- a/third_party/libwebrtc/api/transport/bitrate_settings_gn/moz.build
+++ b/third_party/libwebrtc/api/transport/bitrate_settings_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -132,11 +131,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -161,6 +155,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -171,10 +172,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("bitrate_settings_gn")
diff --git a/third_party/libwebrtc/api/transport/field_trial_based_config_gn/moz.build b/third_party/libwebrtc/api/transport/field_trial_based_config_gn/moz.build
index 6d6aab86fa08..bed9afdf2a01 100644
--- a/third_party/libwebrtc/api/transport/field_trial_based_config_gn/moz.build
+++ b/third_party/libwebrtc/api/transport/field_trial_based_config_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("field_trial_based_config_gn")
diff --git a/third_party/libwebrtc/api/transport/goog_cc_gn/moz.build b/third_party/libwebrtc/api/transport/goog_cc_gn/moz.build
index 56804411f5ba..2989b81be163 100644
--- a/third_party/libwebrtc/api/transport/goog_cc_gn/moz.build
+++ b/third_party/libwebrtc/api/transport/goog_cc_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -149,11 +148,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -178,6 +172,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -188,10 +189,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("goog_cc_gn")
diff --git a/third_party/libwebrtc/api/transport/network_control_gn/moz.build b/third_party/libwebrtc/api/transport/network_control_gn/moz.build
index a5c1f7499f66..deadc8ac83a6 100644
--- a/third_party/libwebrtc/api/transport/network_control_gn/moz.build
+++ b/third_party/libwebrtc/api/transport/network_control_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("network_control_gn")
diff --git a/third_party/libwebrtc/api/transport/rtp/dependency_descriptor_gn/moz.build b/third_party/libwebrtc/api/transport/rtp/dependency_descriptor_gn/moz.build
index 719e84c09d9f..c9744ca742b1 100644
--- a/third_party/libwebrtc/api/transport/rtp/dependency_descriptor_gn/moz.build
+++ b/third_party/libwebrtc/api/transport/rtp/dependency_descriptor_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -136,11 +135,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -165,6 +159,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -175,10 +176,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("dependency_descriptor_gn")
diff --git a/third_party/libwebrtc/api/transport/rtp/rtp_source_gn/moz.build b/third_party/libwebrtc/api/transport/rtp/rtp_source_gn/moz.build
index ad833bf2960a..8357ef5ad627 100644
--- a/third_party/libwebrtc/api/transport/rtp/rtp_source_gn/moz.build
+++ b/third_party/libwebrtc/api/transport/rtp/rtp_source_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -132,11 +131,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -161,10 +155,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rtp_source_gn")
diff --git a/third_party/libwebrtc/api/transport/webrtc_key_value_config_gn/moz.build b/third_party/libwebrtc/api/transport/webrtc_key_value_config_gn/moz.build
index a5a2e3f235c3..7c9e317da4a9 100644
--- a/third_party/libwebrtc/api/transport/webrtc_key_value_config_gn/moz.build
+++ b/third_party/libwebrtc/api/transport/webrtc_key_value_config_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("webrtc_key_value_config_gn")
diff --git a/third_party/libwebrtc/api/transport_api_gn/moz.build b/third_party/libwebrtc/api/transport_api_gn/moz.build
index ffa2ba745a63..d82101ec94ab 100644
--- a/third_party/libwebrtc/api/transport_api_gn/moz.build
+++ b/third_party/libwebrtc/api/transport_api_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -132,11 +131,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -161,6 +155,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -171,10 +172,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("transport_api_gn")
diff --git a/third_party/libwebrtc/api/units/data_rate_gn/moz.build b/third_party/libwebrtc/api/units/data_rate_gn/moz.build
index 708c03400992..db8dfa3e42cf 100644
--- a/third_party/libwebrtc/api/units/data_rate_gn/moz.build
+++ b/third_party/libwebrtc/api/units/data_rate_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -136,11 +135,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -165,6 +159,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -175,10 +176,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("data_rate_gn")
diff --git a/third_party/libwebrtc/api/units/data_size_gn/moz.build b/third_party/libwebrtc/api/units/data_size_gn/moz.build
index 131fcc15d5d4..97e1fb9ed783 100644
--- a/third_party/libwebrtc/api/units/data_size_gn/moz.build
+++ b/third_party/libwebrtc/api/units/data_size_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -136,11 +135,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -165,6 +159,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -175,10 +176,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("data_size_gn")
diff --git a/third_party/libwebrtc/api/units/frequency_gn/moz.build b/third_party/libwebrtc/api/units/frequency_gn/moz.build
index 3e0f0874f695..b47ea78e3866 100644
--- a/third_party/libwebrtc/api/units/frequency_gn/moz.build
+++ b/third_party/libwebrtc/api/units/frequency_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -136,11 +135,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -165,6 +159,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -175,10 +176,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("frequency_gn")
diff --git a/third_party/libwebrtc/api/units/time_delta_gn/moz.build b/third_party/libwebrtc/api/units/time_delta_gn/moz.build
index 549ec2e14e95..cb171f6a7784 100644
--- a/third_party/libwebrtc/api/units/time_delta_gn/moz.build
+++ b/third_party/libwebrtc/api/units/time_delta_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -136,11 +135,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -165,6 +159,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -175,10 +176,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("time_delta_gn")
diff --git a/third_party/libwebrtc/api/units/timestamp_gn/moz.build b/third_party/libwebrtc/api/units/timestamp_gn/moz.build
index d5ee2ac80ba4..92f1144788f1 100644
--- a/third_party/libwebrtc/api/units/timestamp_gn/moz.build
+++ b/third_party/libwebrtc/api/units/timestamp_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -136,11 +135,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -165,6 +159,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -175,10 +176,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("timestamp_gn")
diff --git a/third_party/libwebrtc/api/video/builtin_video_bitrate_allocator_factory_gn/moz.build b/third_party/libwebrtc/api/video/builtin_video_bitrate_allocator_factory_gn/moz.build
index 0bf3c7dabbaa..99a84f43d8f4 100644
--- a/third_party/libwebrtc/api/video/builtin_video_bitrate_allocator_factory_gn/moz.build
+++ b/third_party/libwebrtc/api/video/builtin_video_bitrate_allocator_factory_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -149,11 +148,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -178,6 +172,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -188,10 +189,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("builtin_video_bitrate_allocator_factory_gn")
diff --git a/third_party/libwebrtc/api/video/encoded_frame_gn/moz.build b/third_party/libwebrtc/api/video/encoded_frame_gn/moz.build
index 62494d3a3783..8ce67d2b1c7c 100644
--- a/third_party/libwebrtc/api/video/encoded_frame_gn/moz.build
+++ b/third_party/libwebrtc/api/video/encoded_frame_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -149,11 +148,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -178,6 +172,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -188,10 +189,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("encoded_frame_gn")
diff --git a/third_party/libwebrtc/api/video/encoded_image_gn/moz.build b/third_party/libwebrtc/api/video/encoded_image_gn/moz.build
index 8d9a1c9b0e39..badeb57ac51d 100644
--- a/third_party/libwebrtc/api/video/encoded_image_gn/moz.build
+++ b/third_party/libwebrtc/api/video/encoded_image_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("encoded_image_gn")
diff --git a/third_party/libwebrtc/api/video/recordable_encoded_frame_gn/moz.build b/third_party/libwebrtc/api/video/recordable_encoded_frame_gn/moz.build
index 97a5098ea5a5..52891f96afb5 100644
--- a/third_party/libwebrtc/api/video/recordable_encoded_frame_gn/moz.build
+++ b/third_party/libwebrtc/api/video/recordable_encoded_frame_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -132,11 +131,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -161,10 +155,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("recordable_encoded_frame_gn")
diff --git a/third_party/libwebrtc/api/video/video_adaptation_gn/moz.build b/third_party/libwebrtc/api/video/video_adaptation_gn/moz.build
index 2600958d4353..54bb28f68e4c 100644
--- a/third_party/libwebrtc/api/video/video_adaptation_gn/moz.build
+++ b/third_party/libwebrtc/api/video/video_adaptation_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -136,11 +135,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -165,6 +159,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -175,10 +176,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("video_adaptation_gn")
diff --git a/third_party/libwebrtc/api/video/video_bitrate_allocation_gn/moz.build b/third_party/libwebrtc/api/video/video_bitrate_allocation_gn/moz.build
index 860dce93c861..392a6954e08d 100644
--- a/third_party/libwebrtc/api/video/video_bitrate_allocation_gn/moz.build
+++ b/third_party/libwebrtc/api/video/video_bitrate_allocation_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -136,11 +135,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -165,6 +159,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -175,10 +176,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("video_bitrate_allocation_gn")
diff --git a/third_party/libwebrtc/api/video/video_bitrate_allocator_factory_gn/moz.build b/third_party/libwebrtc/api/video/video_bitrate_allocator_factory_gn/moz.build
index 8a7746d3d386..1db1b3f8dfc0 100644
--- a/third_party/libwebrtc/api/video/video_bitrate_allocator_factory_gn/moz.build
+++ b/third_party/libwebrtc/api/video/video_bitrate_allocator_factory_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -132,11 +131,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -161,10 +155,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("video_bitrate_allocator_factory_gn")
diff --git a/third_party/libwebrtc/api/video/video_bitrate_allocator_gn/moz.build b/third_party/libwebrtc/api/video/video_bitrate_allocator_gn/moz.build
index 13c22a1ca81f..93cb02b8c488 100644
--- a/third_party/libwebrtc/api/video/video_bitrate_allocator_gn/moz.build
+++ b/third_party/libwebrtc/api/video/video_bitrate_allocator_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -136,11 +135,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -165,6 +159,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -175,10 +176,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("video_bitrate_allocator_gn")
diff --git a/third_party/libwebrtc/api/video/video_codec_constants_gn/moz.build b/third_party/libwebrtc/api/video/video_codec_constants_gn/moz.build
index ff4503548424..842be7341fdc 100644
--- a/third_party/libwebrtc/api/video/video_codec_constants_gn/moz.build
+++ b/third_party/libwebrtc/api/video/video_codec_constants_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("video_codec_constants_gn")
diff --git a/third_party/libwebrtc/api/video/video_frame_gn/moz.build b/third_party/libwebrtc/api/video/video_frame_gn/moz.build
index aa6b498a5132..3ed9af4e80a9 100644
--- a/third_party/libwebrtc/api/video/video_frame_gn/moz.build
+++ b/third_party/libwebrtc/api/video/video_frame_gn/moz.build
@@ -79,7 +79,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -142,11 +141,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -171,6 +165,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -181,10 +182,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("video_frame_gn")
diff --git a/third_party/libwebrtc/api/video/video_frame_i010_gn/moz.build b/third_party/libwebrtc/api/video/video_frame_i010_gn/moz.build
index 3a807a491b1f..f5e98b8bdad6 100644
--- a/third_party/libwebrtc/api/video/video_frame_i010_gn/moz.build
+++ b/third_party/libwebrtc/api/video/video_frame_i010_gn/moz.build
@@ -80,7 +80,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -151,11 +150,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -180,6 +174,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -190,10 +191,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("video_frame_i010_gn")
diff --git a/third_party/libwebrtc/api/video/video_frame_i420_gn/moz.build b/third_party/libwebrtc/api/video/video_frame_i420_gn/moz.build
index 00d48077ff0e..daadd37570ae 100644
--- a/third_party/libwebrtc/api/video/video_frame_i420_gn/moz.build
+++ b/third_party/libwebrtc/api/video/video_frame_i420_gn/moz.build
@@ -80,7 +80,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -151,11 +150,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -180,6 +174,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -190,10 +191,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("video_frame_i420_gn")
diff --git a/third_party/libwebrtc/api/video/video_frame_metadata_gn/moz.build b/third_party/libwebrtc/api/video/video_frame_metadata_gn/moz.build
index 8b71a4f21dae..09771a194381 100644
--- a/third_party/libwebrtc/api/video/video_frame_metadata_gn/moz.build
+++ b/third_party/libwebrtc/api/video/video_frame_metadata_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("video_frame_metadata_gn")
diff --git a/third_party/libwebrtc/api/video/video_frame_nv12_gn/moz.build b/third_party/libwebrtc/api/video/video_frame_nv12_gn/moz.build
index b2ca880007f0..c4a0e99b1a67 100644
--- a/third_party/libwebrtc/api/video/video_frame_nv12_gn/moz.build
+++ b/third_party/libwebrtc/api/video/video_frame_nv12_gn/moz.build
@@ -80,7 +80,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -151,11 +150,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -180,6 +174,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -190,10 +191,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("video_frame_nv12_gn")
diff --git a/third_party/libwebrtc/api/video/video_frame_type_gn/moz.build b/third_party/libwebrtc/api/video/video_frame_type_gn/moz.build
index 84f376b047f4..322b31eae189 100644
--- a/third_party/libwebrtc/api/video/video_frame_type_gn/moz.build
+++ b/third_party/libwebrtc/api/video/video_frame_type_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("video_frame_type_gn")
diff --git a/third_party/libwebrtc/api/video/video_rtp_headers_gn/moz.build b/third_party/libwebrtc/api/video/video_rtp_headers_gn/moz.build
index 5212da23c571..6d9bfe052a35 100644
--- a/third_party/libwebrtc/api/video/video_rtp_headers_gn/moz.build
+++ b/third_party/libwebrtc/api/video/video_rtp_headers_gn/moz.build
@@ -80,7 +80,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -143,11 +142,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -172,6 +166,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -182,10 +183,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("video_rtp_headers_gn")
diff --git a/third_party/libwebrtc/api/video/video_stream_encoder_create_gn/moz.build b/third_party/libwebrtc/api/video/video_stream_encoder_create_gn/moz.build
index 13ca9843bc95..f8ab62cc73d0 100644
--- a/third_party/libwebrtc/api/video/video_stream_encoder_create_gn/moz.build
+++ b/third_party/libwebrtc/api/video/video_stream_encoder_create_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -149,11 +148,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -178,6 +172,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -188,10 +189,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("video_stream_encoder_create_gn")
diff --git a/third_party/libwebrtc/api/video/video_stream_encoder_gn/moz.build b/third_party/libwebrtc/api/video/video_stream_encoder_gn/moz.build
index f1d38973a351..5b023d8dfbbf 100644
--- a/third_party/libwebrtc/api/video/video_stream_encoder_gn/moz.build
+++ b/third_party/libwebrtc/api/video/video_stream_encoder_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -132,11 +131,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -161,10 +155,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("video_stream_encoder_gn")
diff --git a/third_party/libwebrtc/api/video_codecs/bitstream_parser_api_gn/moz.build b/third_party/libwebrtc/api/video_codecs/bitstream_parser_api_gn/moz.build
index a17b7feb743e..4a0aaf1f6240 100644
--- a/third_party/libwebrtc/api/video_codecs/bitstream_parser_api_gn/moz.build
+++ b/third_party/libwebrtc/api/video_codecs/bitstream_parser_api_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -128,11 +127,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -157,10 +151,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("bitstream_parser_api_gn")
diff --git a/third_party/libwebrtc/api/video_codecs/builtin_video_decoder_factory_gn/moz.build b/third_party/libwebrtc/api/video_codecs/builtin_video_decoder_factory_gn/moz.build
index d03160eff0f1..37bdbe867041 100644
--- a/third_party/libwebrtc/api/video_codecs/builtin_video_decoder_factory_gn/moz.build
+++ b/third_party/libwebrtc/api/video_codecs/builtin_video_decoder_factory_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -149,11 +148,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -178,6 +172,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -188,10 +189,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("builtin_video_decoder_factory_gn")
diff --git a/third_party/libwebrtc/api/video_codecs/builtin_video_encoder_factory_gn/moz.build b/third_party/libwebrtc/api/video_codecs/builtin_video_encoder_factory_gn/moz.build
index 1dadaae1e928..63d7916f587b 100644
--- a/third_party/libwebrtc/api/video_codecs/builtin_video_encoder_factory_gn/moz.build
+++ b/third_party/libwebrtc/api/video_codecs/builtin_video_encoder_factory_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -149,11 +148,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -178,6 +172,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -188,10 +189,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("builtin_video_encoder_factory_gn")
diff --git a/third_party/libwebrtc/api/video_codecs/rtc_software_fallback_wrappers_gn/moz.build b/third_party/libwebrtc/api/video_codecs/rtc_software_fallback_wrappers_gn/moz.build
index c1cdc9e44aa5..f3acda93c586 100644
--- a/third_party/libwebrtc/api/video_codecs/rtc_software_fallback_wrappers_gn/moz.build
+++ b/third_party/libwebrtc/api/video_codecs/rtc_software_fallback_wrappers_gn/moz.build
@@ -79,7 +79,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -150,11 +149,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -179,6 +173,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -189,10 +190,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rtc_software_fallback_wrappers_gn")
diff --git a/third_party/libwebrtc/api/video_codecs/video_codecs_api_gn/moz.build b/third_party/libwebrtc/api/video_codecs/video_codecs_api_gn/moz.build
index 427571507f94..cbde20ed59d5 100644
--- a/third_party/libwebrtc/api/video_codecs/video_codecs_api_gn/moz.build
+++ b/third_party/libwebrtc/api/video_codecs/video_codecs_api_gn/moz.build
@@ -85,7 +85,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -148,11 +147,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -177,6 +171,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -187,10 +188,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("video_codecs_api_gn")
diff --git a/third_party/libwebrtc/api/video_codecs/vp8_temporal_layers_factory_gn/moz.build b/third_party/libwebrtc/api/video_codecs/vp8_temporal_layers_factory_gn/moz.build
index 509e3dcf64aa..b2397b024133 100644
--- a/third_party/libwebrtc/api/video_codecs/vp8_temporal_layers_factory_gn/moz.build
+++ b/third_party/libwebrtc/api/video_codecs/vp8_temporal_layers_factory_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -149,11 +148,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -178,6 +172,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -188,10 +189,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("vp8_temporal_layers_factory_gn")
diff --git a/third_party/libwebrtc/audio/audio_gn/moz.build b/third_party/libwebrtc/audio/audio_gn/moz.build
index b53f495edaf3..ffa016f36790 100644
--- a/third_party/libwebrtc/audio/audio_gn/moz.build
+++ b/third_party/libwebrtc/audio/audio_gn/moz.build
@@ -91,7 +91,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -162,11 +161,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -191,6 +185,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -201,10 +202,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_gn")
diff --git a/third_party/libwebrtc/audio/utility/audio_frame_operations_gn/moz.build b/third_party/libwebrtc/audio/utility/audio_frame_operations_gn/moz.build
index 5f19fa99b855..d135fbce0b2f 100644
--- a/third_party/libwebrtc/audio/utility/audio_frame_operations_gn/moz.build
+++ b/third_party/libwebrtc/audio/utility/audio_frame_operations_gn/moz.build
@@ -79,7 +79,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -149,11 +148,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -178,6 +172,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -188,10 +189,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_frame_operations_gn")
diff --git a/third_party/libwebrtc/call/adaptation/resource_adaptation_gn/moz.build b/third_party/libwebrtc/call/adaptation/resource_adaptation_gn/moz.build
index 33ca8b5bf7f0..42be32b5f175 100644
--- a/third_party/libwebrtc/call/adaptation/resource_adaptation_gn/moz.build
+++ b/third_party/libwebrtc/call/adaptation/resource_adaptation_gn/moz.build
@@ -87,7 +87,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -158,11 +157,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -187,6 +181,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -197,10 +198,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("resource_adaptation_gn")
diff --git a/third_party/libwebrtc/call/audio_sender_interface_gn/moz.build b/third_party/libwebrtc/call/audio_sender_interface_gn/moz.build
index 218ea75003f1..c72f46fb3f66 100644
--- a/third_party/libwebrtc/call/audio_sender_interface_gn/moz.build
+++ b/third_party/libwebrtc/call/audio_sender_interface_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -132,11 +131,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -161,10 +155,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_sender_interface_gn")
diff --git a/third_party/libwebrtc/call/bitrate_allocator_gn/moz.build b/third_party/libwebrtc/call/bitrate_allocator_gn/moz.build
index 989365c06dab..ce93a0952f60 100644
--- a/third_party/libwebrtc/call/bitrate_allocator_gn/moz.build
+++ b/third_party/libwebrtc/call/bitrate_allocator_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -147,11 +146,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -176,6 +170,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -186,10 +187,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("bitrate_allocator_gn")
diff --git a/third_party/libwebrtc/call/bitrate_configurator_gn/moz.build b/third_party/libwebrtc/call/bitrate_configurator_gn/moz.build
index ab63eb2d109f..01759daf9e0e 100644
--- a/third_party/libwebrtc/call/bitrate_configurator_gn/moz.build
+++ b/third_party/libwebrtc/call/bitrate_configurator_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -149,11 +148,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -178,6 +172,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -188,10 +189,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("bitrate_configurator_gn")
diff --git a/third_party/libwebrtc/call/call_gn/moz.build b/third_party/libwebrtc/call/call_gn/moz.build
index d6d02c5a1dbd..75999f70ebf4 100644
--- a/third_party/libwebrtc/call/call_gn/moz.build
+++ b/third_party/libwebrtc/call/call_gn/moz.build
@@ -82,7 +82,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -153,11 +152,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -182,6 +176,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -192,10 +193,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("call_gn")
diff --git a/third_party/libwebrtc/call/call_interfaces_gn/moz.build b/third_party/libwebrtc/call/call_interfaces_gn/moz.build
index 1d19f9dc6523..8972117d5a3b 100644
--- a/third_party/libwebrtc/call/call_interfaces_gn/moz.build
+++ b/third_party/libwebrtc/call/call_interfaces_gn/moz.build
@@ -83,7 +83,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -154,11 +153,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -183,6 +177,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -193,10 +194,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("call_interfaces_gn")
diff --git a/third_party/libwebrtc/call/fake_network_gn/moz.build b/third_party/libwebrtc/call/fake_network_gn/moz.build
index e7afa872e071..ca7850ae8954 100644
--- a/third_party/libwebrtc/call/fake_network_gn/moz.build
+++ b/third_party/libwebrtc/call/fake_network_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -149,11 +148,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -178,6 +172,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -188,10 +189,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("fake_network_gn")
diff --git a/third_party/libwebrtc/call/rtp_interfaces_gn/moz.build b/third_party/libwebrtc/call/rtp_interfaces_gn/moz.build
index 28b99c6351ab..ab48081ff0cb 100644
--- a/third_party/libwebrtc/call/rtp_interfaces_gn/moz.build
+++ b/third_party/libwebrtc/call/rtp_interfaces_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -149,11 +148,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -178,6 +172,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -188,10 +189,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rtp_interfaces_gn")
diff --git a/third_party/libwebrtc/call/rtp_receiver_gn/moz.build b/third_party/libwebrtc/call/rtp_receiver_gn/moz.build
index cd2ca9f6e3dc..dd5ab4f0d09e 100644
--- a/third_party/libwebrtc/call/rtp_receiver_gn/moz.build
+++ b/third_party/libwebrtc/call/rtp_receiver_gn/moz.build
@@ -80,7 +80,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -151,11 +150,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -180,6 +174,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -190,10 +191,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rtp_receiver_gn")
diff --git a/third_party/libwebrtc/call/rtp_sender_gn/moz.build b/third_party/libwebrtc/call/rtp_sender_gn/moz.build
index ea6fe59fd815..9431caf12bf5 100644
--- a/third_party/libwebrtc/call/rtp_sender_gn/moz.build
+++ b/third_party/libwebrtc/call/rtp_sender_gn/moz.build
@@ -80,7 +80,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -151,11 +150,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -180,6 +174,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -190,10 +191,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rtp_sender_gn")
diff --git a/third_party/libwebrtc/call/simulated_network_gn/moz.build b/third_party/libwebrtc/call/simulated_network_gn/moz.build
index 13c344334c97..9c602d9f8de9 100644
--- a/third_party/libwebrtc/call/simulated_network_gn/moz.build
+++ b/third_party/libwebrtc/call/simulated_network_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -149,11 +148,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -178,6 +172,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -188,10 +189,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("simulated_network_gn")
diff --git a/third_party/libwebrtc/call/simulated_packet_receiver_gn/moz.build b/third_party/libwebrtc/call/simulated_packet_receiver_gn/moz.build
index 156444ef4328..6ad189c079e1 100644
--- a/third_party/libwebrtc/call/simulated_packet_receiver_gn/moz.build
+++ b/third_party/libwebrtc/call/simulated_packet_receiver_gn/moz.build
@@ -74,7 +74,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -141,11 +140,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -170,10 +164,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("simulated_packet_receiver_gn")
diff --git a/third_party/libwebrtc/call/video_stream_api_gn/moz.build b/third_party/libwebrtc/call/video_stream_api_gn/moz.build
index 2a7c77216dfc..82aaa062035f 100644
--- a/third_party/libwebrtc/call/video_stream_api_gn/moz.build
+++ b/third_party/libwebrtc/call/video_stream_api_gn/moz.build
@@ -79,7 +79,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -150,11 +149,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -179,6 +173,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -189,10 +190,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("video_stream_api_gn")
diff --git a/third_party/libwebrtc/common_audio/common_audio_c_arm_asm_gn/moz.build b/third_party/libwebrtc/common_audio/common_audio_c_arm_asm_gn/moz.build
index 535ffe6f7319..555e049415d3 100644
--- a/third_party/libwebrtc/common_audio/common_audio_c_arm_asm_gn/moz.build
+++ b/third_party/libwebrtc/common_audio/common_audio_c_arm_asm_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
     SOURCES += [
         "/third_party/libwebrtc/common_audio/signal_processing/complex_bit_reverse_arm.S",
         "/third_party/libwebrtc/common_audio/signal_processing/filter_ar_fast_q12_armv7.S"
@@ -158,10 +152,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("common_audio_c_arm_asm_gn")
diff --git a/third_party/libwebrtc/common_audio/common_audio_c_gn/moz.build b/third_party/libwebrtc/common_audio/common_audio_c_gn/moz.build
index 56f976190890..f33242a6409c 100644
--- a/third_party/libwebrtc/common_audio/common_audio_c_gn/moz.build
+++ b/third_party/libwebrtc/common_audio/common_audio_c_gn/moz.build
@@ -120,7 +120,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -130,11 +129,6 @@ if CONFIG["OS_TARGET"] == "Linux":
         "rt"
     ]
 
-    UNIFIED_SOURCES += [
-        "/third_party/libwebrtc/common_audio/signal_processing/complex_bit_reverse.c",
-        "/third_party/libwebrtc/common_audio/signal_processing/filter_ar_fast_q12.c"
-    ]
-
 if CONFIG["OS_TARGET"] == "OpenBSD":
 
     DEFINES["USE_GLIB"] = "1"
@@ -205,9 +199,11 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
+if CONFIG["CPU_ARCH"] == "ppc64":
+
+    UNIFIED_SOURCES += [
+        "/third_party/libwebrtc/common_audio/signal_processing/complex_bit_reverse.c",
+        "/third_party/libwebrtc/common_audio/signal_processing/filter_ar_fast_q12.c"
     ]
 
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
@@ -241,6 +237,13 @@ if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Android":
         "/third_party/libwebrtc/common_audio/signal_processing/filter_ar_fast_q12.c"
     ]
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CFLAGS += [
@@ -263,10 +266,39 @@ if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Android":
         "/third_party/libwebrtc/common_audio/signal_processing/filter_ar_fast_q12.c"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+    UNIFIED_SOURCES += [
+        "/third_party/libwebrtc/common_audio/signal_processing/complex_bit_reverse.c",
+        "/third_party/libwebrtc/common_audio/signal_processing/filter_ar_fast_q12.c"
+    ]
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+    UNIFIED_SOURCES += [
+        "/third_party/libwebrtc/common_audio/signal_processing/complex_bit_reverse.c",
+        "/third_party/libwebrtc/common_audio/signal_processing/filter_ar_fast_q12.c"
+    ]
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+    UNIFIED_SOURCES += [
+        "/third_party/libwebrtc/common_audio/signal_processing/complex_bit_reverse.c",
+        "/third_party/libwebrtc/common_audio/signal_processing/filter_ar_fast_q12.c"
+    ]
+
 Library("common_audio_c_gn")
diff --git a/third_party/libwebrtc/common_audio/common_audio_cc_gn/moz.build b/third_party/libwebrtc/common_audio/common_audio_cc_gn/moz.build
index 00013babc481..595e221a1776 100644
--- a/third_party/libwebrtc/common_audio/common_audio_cc_gn/moz.build
+++ b/third_party/libwebrtc/common_audio/common_audio_cc_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -147,11 +146,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -176,6 +170,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -186,10 +187,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("common_audio_cc_gn")
diff --git a/third_party/libwebrtc/common_audio/common_audio_gn/moz.build b/third_party/libwebrtc/common_audio/common_audio_gn/moz.build
index 96d13ffa716a..f2df0ce86b01 100644
--- a/third_party/libwebrtc/common_audio/common_audio_gn/moz.build
+++ b/third_party/libwebrtc/common_audio/common_audio_gn/moz.build
@@ -90,7 +90,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -160,11 +159,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -189,6 +183,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -199,10 +200,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("common_audio_gn")
diff --git a/third_party/libwebrtc/common_audio/common_audio_neon_c_gn/moz.build b/third_party/libwebrtc/common_audio/common_audio_neon_c_gn/moz.build
index b598ac1bbac4..3d289c508fb5 100644
--- a/third_party/libwebrtc/common_audio/common_audio_neon_c_gn/moz.build
+++ b/third_party/libwebrtc/common_audio/common_audio_neon_c_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["USE_NSS_CERTS"] = "1"
     DEFINES["USE_OZONE"] = "1"
     DEFINES["USE_UDEV"] = True
-    DEFINES["WEBRTC_ARCH_ARM64"] = True
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
@@ -135,11 +134,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM"] = True
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -164,4 +158,15 @@ if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["WEBRTC_ARCH_ARM64"] = True
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["WEBRTC_ARCH_ARM64"] = True
+
 Library("common_audio_neon_c_gn")
diff --git a/third_party/libwebrtc/common_audio/common_audio_neon_gn/moz.build b/third_party/libwebrtc/common_audio/common_audio_neon_gn/moz.build
index f53ee23c2a0a..7a3c9f4f68d0 100644
--- a/third_party/libwebrtc/common_audio/common_audio_neon_gn/moz.build
+++ b/third_party/libwebrtc/common_audio/common_audio_neon_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["USE_NSS_CERTS"] = "1"
     DEFINES["USE_OZONE"] = "1"
     DEFINES["USE_UDEV"] = True
-    DEFINES["WEBRTC_ARCH_ARM64"] = True
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
@@ -134,11 +133,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM"] = True
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -163,4 +157,15 @@ if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["WEBRTC_ARCH_ARM64"] = True
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["WEBRTC_ARCH_ARM64"] = True
+
 Library("common_audio_neon_gn")
diff --git a/third_party/libwebrtc/common_audio/fir_filter_factory_gn/moz.build b/third_party/libwebrtc/common_audio/fir_filter_factory_gn/moz.build
index 305ed7b67d31..3b09c379f34a 100644
--- a/third_party/libwebrtc/common_audio/fir_filter_factory_gn/moz.build
+++ b/third_party/libwebrtc/common_audio/fir_filter_factory_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -148,11 +147,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -177,6 +171,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -187,10 +188,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("fir_filter_factory_gn")
diff --git a/third_party/libwebrtc/common_audio/fir_filter_gn/moz.build b/third_party/libwebrtc/common_audio/fir_filter_gn/moz.build
index 47d7f3096c0c..d1e07d8c39cc 100644
--- a/third_party/libwebrtc/common_audio/fir_filter_gn/moz.build
+++ b/third_party/libwebrtc/common_audio/fir_filter_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("fir_filter_gn")
diff --git a/third_party/libwebrtc/common_audio/sinc_resampler_gn/moz.build b/third_party/libwebrtc/common_audio/sinc_resampler_gn/moz.build
index c20d9cba166b..dbd69345430e 100644
--- a/third_party/libwebrtc/common_audio/sinc_resampler_gn/moz.build
+++ b/third_party/libwebrtc/common_audio/sinc_resampler_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -139,11 +138,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -168,10 +162,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("sinc_resampler_gn")
diff --git a/third_party/libwebrtc/common_audio/third_party/ooura/fft_size_128_gn/moz.build b/third_party/libwebrtc/common_audio/third_party/ooura/fft_size_128_gn/moz.build
index df9f1f755c6f..51b8ecaaa782 100644
--- a/third_party/libwebrtc/common_audio/third_party/ooura/fft_size_128_gn/moz.build
+++ b/third_party/libwebrtc/common_audio/third_party/ooura/fft_size_128_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -159,11 +158,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
     UNIFIED_SOURCES += [
         "/third_party/libwebrtc/common_audio/third_party/ooura/fft_size_128/ooura_fft_neon.cc"
     ]
@@ -198,6 +192,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -229,6 +230,14 @@ if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Darwin":
         "/third_party/libwebrtc/common_audio/third_party/ooura/fft_size_128/ooura_fft_sse2.cc"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
@@ -236,12 +245,16 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
     UNIFIED_SOURCES += [
         "/third_party/libwebrtc/common_audio/third_party/ooura/fft_size_128/ooura_fft_sse2.cc"
     ]
diff --git a/third_party/libwebrtc/common_audio/third_party/ooura/fft_size_256_gn/moz.build b/third_party/libwebrtc/common_audio/third_party/ooura/fft_size_256_gn/moz.build
index 73c7c820d5ca..21ca8d946852 100644
--- a/third_party/libwebrtc/common_audio/third_party/ooura/fft_size_256_gn/moz.build
+++ b/third_party/libwebrtc/common_audio/third_party/ooura/fft_size_256_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -132,11 +131,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -161,6 +155,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -171,10 +172,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("fft_size_256_gn")
diff --git a/third_party/libwebrtc/common_audio/third_party/spl_sqrt_floor/spl_sqrt_floor_gn/moz.build b/third_party/libwebrtc/common_audio/third_party/spl_sqrt_floor/spl_sqrt_floor_gn/moz.build
index 198b9fcca59f..87610cfa7d92 100644
--- a/third_party/libwebrtc/common_audio/third_party/spl_sqrt_floor/spl_sqrt_floor_gn/moz.build
+++ b/third_party/libwebrtc/common_audio/third_party/spl_sqrt_floor/spl_sqrt_floor_gn/moz.build
@@ -73,16 +73,11 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
     DEFINES["__STDC_FORMAT_MACROS"] = True
 
-    UNIFIED_SOURCES += [
-        "/third_party/libwebrtc/common_audio/third_party/spl_sqrt_floor/spl_sqrt_floor.c"
-    ]
-
 if CONFIG["OS_TARGET"] == "OpenBSD":
 
     DEFINES["USE_GLIB"] = "1"
@@ -140,15 +135,16 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
     SOURCES += [
         "/third_party/libwebrtc/common_audio/third_party/spl_sqrt_floor/spl_sqrt_floor_arm.S"
     ]
 
+if CONFIG["CPU_ARCH"] == "ppc64":
+
+    UNIFIED_SOURCES += [
+        "/third_party/libwebrtc/common_audio/third_party/spl_sqrt_floor/spl_sqrt_floor.c"
+    ]
+
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -179,6 +175,13 @@ if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Android":
         "/third_party/libwebrtc/common_audio/third_party/spl_sqrt_floor/spl_sqrt_floor.c"
     ]
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CFLAGS += [
@@ -199,10 +202,36 @@ if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Android":
         "/third_party/libwebrtc/common_audio/third_party/spl_sqrt_floor/spl_sqrt_floor.c"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+    UNIFIED_SOURCES += [
+        "/third_party/libwebrtc/common_audio/third_party/spl_sqrt_floor/spl_sqrt_floor.c"
+    ]
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+    UNIFIED_SOURCES += [
+        "/third_party/libwebrtc/common_audio/third_party/spl_sqrt_floor/spl_sqrt_floor.c"
+    ]
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+    UNIFIED_SOURCES += [
+        "/third_party/libwebrtc/common_audio/third_party/spl_sqrt_floor/spl_sqrt_floor.c"
+    ]
+
 Library("spl_sqrt_floor_gn")
diff --git a/third_party/libwebrtc/common_video/common_video_gn/moz.build b/third_party/libwebrtc/common_video/common_video_gn/moz.build
index 659ea7b3e7f5..c48343244bc0 100644
--- a/third_party/libwebrtc/common_video/common_video_gn/moz.build
+++ b/third_party/libwebrtc/common_video/common_video_gn/moz.build
@@ -91,7 +91,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -162,11 +161,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -191,6 +185,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -201,10 +202,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("common_video_gn")
diff --git a/third_party/libwebrtc/common_video/frame_counts_gn/moz.build b/third_party/libwebrtc/common_video/frame_counts_gn/moz.build
index a0702a7a2236..2c082466369f 100644
--- a/third_party/libwebrtc/common_video/frame_counts_gn/moz.build
+++ b/third_party/libwebrtc/common_video/frame_counts_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("frame_counts_gn")
diff --git a/third_party/libwebrtc/common_video/generic_frame_descriptor/generic_frame_descriptor_gn/moz.build b/third_party/libwebrtc/common_video/generic_frame_descriptor/generic_frame_descriptor_gn/moz.build
index 623a4776051f..0ef3fdcb1671 100644
--- a/third_party/libwebrtc/common_video/generic_frame_descriptor/generic_frame_descriptor_gn/moz.build
+++ b/third_party/libwebrtc/common_video/generic_frame_descriptor/generic_frame_descriptor_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -136,11 +135,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -165,6 +159,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -175,10 +176,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("generic_frame_descriptor_gn")
diff --git a/third_party/libwebrtc/logging/rtc_event_audio_gn/moz.build b/third_party/libwebrtc/logging/rtc_event_audio_gn/moz.build
index 8edae37a0dab..a2dece6a12b7 100644
--- a/third_party/libwebrtc/logging/rtc_event_audio_gn/moz.build
+++ b/third_party/libwebrtc/logging/rtc_event_audio_gn/moz.build
@@ -80,7 +80,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -143,11 +142,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -172,6 +166,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -182,10 +183,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rtc_event_audio_gn")
diff --git a/third_party/libwebrtc/logging/rtc_event_bwe_gn/moz.build b/third_party/libwebrtc/logging/rtc_event_bwe_gn/moz.build
index 86ff3b04c75b..0c9c2b9b381a 100644
--- a/third_party/libwebrtc/logging/rtc_event_bwe_gn/moz.build
+++ b/third_party/libwebrtc/logging/rtc_event_bwe_gn/moz.build
@@ -83,7 +83,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -154,11 +153,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -183,6 +177,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -193,10 +194,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rtc_event_bwe_gn")
diff --git a/third_party/libwebrtc/logging/rtc_event_pacing_gn/moz.build b/third_party/libwebrtc/logging/rtc_event_pacing_gn/moz.build
index 2f8e9f5008b1..abcbf4c5fadd 100644
--- a/third_party/libwebrtc/logging/rtc_event_pacing_gn/moz.build
+++ b/third_party/libwebrtc/logging/rtc_event_pacing_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rtc_event_pacing_gn")
diff --git a/third_party/libwebrtc/logging/rtc_event_rtp_rtcp_gn/moz.build b/third_party/libwebrtc/logging/rtc_event_rtp_rtcp_gn/moz.build
index c871a9535f0f..bb7d3ae4cfbf 100644
--- a/third_party/libwebrtc/logging/rtc_event_rtp_rtcp_gn/moz.build
+++ b/third_party/libwebrtc/logging/rtc_event_rtp_rtcp_gn/moz.build
@@ -81,7 +81,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -152,11 +151,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -181,6 +175,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -191,10 +192,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rtc_event_rtp_rtcp_gn")
diff --git a/third_party/libwebrtc/logging/rtc_event_video_gn/moz.build b/third_party/libwebrtc/logging/rtc_event_video_gn/moz.build
index 806df070e6a4..30ec45d4504a 100644
--- a/third_party/libwebrtc/logging/rtc_event_video_gn/moz.build
+++ b/third_party/libwebrtc/logging/rtc_event_video_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -141,11 +140,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -170,6 +164,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -180,10 +181,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rtc_event_video_gn")
diff --git a/third_party/libwebrtc/logging/rtc_stream_config_gn/moz.build b/third_party/libwebrtc/logging/rtc_stream_config_gn/moz.build
index 53644c9d7e94..64d287112de4 100644
--- a/third_party/libwebrtc/logging/rtc_stream_config_gn/moz.build
+++ b/third_party/libwebrtc/logging/rtc_stream_config_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rtc_stream_config_gn")
diff --git a/third_party/libwebrtc/media/rtc_constants_gn/moz.build b/third_party/libwebrtc/media/rtc_constants_gn/moz.build
index 97ada3e76d05..e974486fb73f 100644
--- a/third_party/libwebrtc/media/rtc_constants_gn/moz.build
+++ b/third_party/libwebrtc/media/rtc_constants_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -132,11 +131,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -161,6 +155,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -171,10 +172,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rtc_constants_gn")
diff --git a/third_party/libwebrtc/media/rtc_encoder_simulcast_proxy_gn/moz.build b/third_party/libwebrtc/media/rtc_encoder_simulcast_proxy_gn/moz.build
index 7e516e05622a..2b377c439832 100644
--- a/third_party/libwebrtc/media/rtc_encoder_simulcast_proxy_gn/moz.build
+++ b/third_party/libwebrtc/media/rtc_encoder_simulcast_proxy_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -149,11 +148,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -178,6 +172,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -188,10 +189,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rtc_encoder_simulcast_proxy_gn")
diff --git a/third_party/libwebrtc/media/rtc_h264_profile_id_gn/moz.build b/third_party/libwebrtc/media/rtc_h264_profile_id_gn/moz.build
index e31699a311fa..6844178c6ccc 100644
--- a/third_party/libwebrtc/media/rtc_h264_profile_id_gn/moz.build
+++ b/third_party/libwebrtc/media/rtc_h264_profile_id_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -149,11 +148,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -178,6 +172,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -188,10 +189,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rtc_h264_profile_id_gn")
diff --git a/third_party/libwebrtc/media/rtc_internal_video_codecs_gn/moz.build b/third_party/libwebrtc/media/rtc_internal_video_codecs_gn/moz.build
index 1ebf065d63ad..56ef2c321cfe 100644
--- a/third_party/libwebrtc/media/rtc_internal_video_codecs_gn/moz.build
+++ b/third_party/libwebrtc/media/rtc_internal_video_codecs_gn/moz.build
@@ -80,7 +80,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -151,11 +150,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -180,6 +174,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -190,10 +191,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rtc_internal_video_codecs_gn")
diff --git a/third_party/libwebrtc/media/rtc_media_base_gn/moz.build b/third_party/libwebrtc/media/rtc_media_base_gn/moz.build
index 8307cb45678a..f1c19c6dd9fe 100644
--- a/third_party/libwebrtc/media/rtc_media_base_gn/moz.build
+++ b/third_party/libwebrtc/media/rtc_media_base_gn/moz.build
@@ -83,7 +83,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -154,11 +153,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -183,6 +177,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -193,10 +194,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rtc_media_base_gn")
diff --git a/third_party/libwebrtc/media/rtc_media_config_gn/moz.build b/third_party/libwebrtc/media/rtc_media_config_gn/moz.build
index 318da2aa2ce7..a9926573ede9 100644
--- a/third_party/libwebrtc/media/rtc_media_config_gn/moz.build
+++ b/third_party/libwebrtc/media/rtc_media_config_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rtc_media_config_gn")
diff --git a/third_party/libwebrtc/media/rtc_simulcast_encoder_adapter_gn/moz.build b/third_party/libwebrtc/media/rtc_simulcast_encoder_adapter_gn/moz.build
index ee2957362c8e..ceaa7aec0299 100644
--- a/third_party/libwebrtc/media/rtc_simulcast_encoder_adapter_gn/moz.build
+++ b/third_party/libwebrtc/media/rtc_simulcast_encoder_adapter_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -149,11 +148,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -178,6 +172,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -188,10 +189,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rtc_simulcast_encoder_adapter_gn")
diff --git a/third_party/libwebrtc/media/rtc_vp9_profile_gn/moz.build b/third_party/libwebrtc/media/rtc_vp9_profile_gn/moz.build
index 52f860a44143..ef896d5ff6ee 100644
--- a/third_party/libwebrtc/media/rtc_vp9_profile_gn/moz.build
+++ b/third_party/libwebrtc/media/rtc_vp9_profile_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rtc_vp9_profile_gn")
diff --git a/third_party/libwebrtc/modules/audio_coding/audio_coding_gn/moz.build b/third_party/libwebrtc/modules/audio_coding/audio_coding_gn/moz.build
index f764792d4f43..2584f7b5b22e 100644
--- a/third_party/libwebrtc/modules/audio_coding/audio_coding_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_coding/audio_coding_gn/moz.build
@@ -81,7 +81,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -151,11 +150,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -180,6 +174,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -190,10 +191,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_coding_gn")
diff --git a/third_party/libwebrtc/modules/audio_coding/audio_coding_module_typedefs_gn/moz.build b/third_party/libwebrtc/modules/audio_coding/audio_coding_module_typedefs_gn/moz.build
index cfa91240f9b7..ff52a5e847a4 100644
--- a/third_party/libwebrtc/modules/audio_coding/audio_coding_module_typedefs_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_coding/audio_coding_module_typedefs_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_coding_module_typedefs_gn")
diff --git a/third_party/libwebrtc/modules/audio_coding/audio_coding_opus_common_gn/moz.build b/third_party/libwebrtc/modules/audio_coding/audio_coding_opus_common_gn/moz.build
index 5ccb20803b0f..d937e61e646e 100644
--- a/third_party/libwebrtc/modules/audio_coding/audio_coding_opus_common_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_coding/audio_coding_opus_common_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_coding_opus_common_gn")
diff --git a/third_party/libwebrtc/modules/audio_coding/audio_encoder_cng_gn/moz.build b/third_party/libwebrtc/modules/audio_coding/audio_encoder_cng_gn/moz.build
index 91c9d1af5f36..d1a7bb0c2343 100644
--- a/third_party/libwebrtc/modules/audio_coding/audio_encoder_cng_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_coding/audio_encoder_cng_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -147,11 +146,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -176,6 +170,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -186,10 +187,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_encoder_cng_gn")
diff --git a/third_party/libwebrtc/modules/audio_coding/audio_network_adaptor_config_gn/moz.build b/third_party/libwebrtc/modules/audio_coding/audio_network_adaptor_config_gn/moz.build
index 54407cb92a9e..571034c095bf 100644
--- a/third_party/libwebrtc/modules/audio_coding/audio_network_adaptor_config_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_coding/audio_network_adaptor_config_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -132,11 +131,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -161,6 +155,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -171,10 +172,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_network_adaptor_config_gn")
diff --git a/third_party/libwebrtc/modules/audio_coding/audio_network_adaptor_gn/moz.build b/third_party/libwebrtc/modules/audio_coding/audio_network_adaptor_gn/moz.build
index 244291ada6e8..83b98d03b4e4 100644
--- a/third_party/libwebrtc/modules/audio_coding/audio_network_adaptor_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_coding/audio_network_adaptor_gn/moz.build
@@ -87,7 +87,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -157,11 +156,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -186,6 +180,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -196,10 +197,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_network_adaptor_gn")
diff --git a/third_party/libwebrtc/modules/audio_coding/default_neteq_factory_gn/moz.build b/third_party/libwebrtc/modules/audio_coding/default_neteq_factory_gn/moz.build
index f7e3f15eaf47..b3cba7d919b2 100644
--- a/third_party/libwebrtc/modules/audio_coding/default_neteq_factory_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_coding/default_neteq_factory_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -147,11 +146,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -176,6 +170,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -186,10 +187,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("default_neteq_factory_gn")
diff --git a/third_party/libwebrtc/modules/audio_coding/g711_c_gn/moz.build b/third_party/libwebrtc/modules/audio_coding/g711_c_gn/moz.build
index 1b03b700df4d..e3c1102d8d09 100644
--- a/third_party/libwebrtc/modules/audio_coding/g711_c_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_coding/g711_c_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -132,11 +131,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -161,6 +155,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CFLAGS += [
@@ -171,10 +172,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("g711_c_gn")
diff --git a/third_party/libwebrtc/modules/audio_coding/g711_gn/moz.build b/third_party/libwebrtc/modules/audio_coding/g711_gn/moz.build
index 5ab36ff1e37c..6b7718168b4e 100644
--- a/third_party/libwebrtc/modules/audio_coding/g711_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_coding/g711_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -141,11 +140,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -170,6 +164,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -180,10 +181,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("g711_gn")
diff --git a/third_party/libwebrtc/modules/audio_coding/g722_c_gn/moz.build b/third_party/libwebrtc/modules/audio_coding/g722_c_gn/moz.build
index 2fe9944033e0..3fc0bef73618 100644
--- a/third_party/libwebrtc/modules/audio_coding/g722_c_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_coding/g722_c_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -132,11 +131,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -161,6 +155,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CFLAGS += [
@@ -171,10 +172,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("g722_c_gn")
diff --git a/third_party/libwebrtc/modules/audio_coding/g722_gn/moz.build b/third_party/libwebrtc/modules/audio_coding/g722_gn/moz.build
index 34fff594289c..d7d25e6fb410 100644
--- a/third_party/libwebrtc/modules/audio_coding/g722_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_coding/g722_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -141,11 +140,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -170,6 +164,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -180,10 +181,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("g722_gn")
diff --git a/third_party/libwebrtc/modules/audio_coding/ilbc_c_gn/moz.build b/third_party/libwebrtc/modules/audio_coding/ilbc_c_gn/moz.build
index 9603d5929dff..6d94e676bf69 100644
--- a/third_party/libwebrtc/modules/audio_coding/ilbc_c_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_coding/ilbc_c_gn/moz.build
@@ -145,7 +145,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -215,11 +214,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -244,6 +238,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CFLAGS += [
@@ -254,10 +255,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("ilbc_c_gn")
diff --git a/third_party/libwebrtc/modules/audio_coding/ilbc_gn/moz.build b/third_party/libwebrtc/modules/audio_coding/ilbc_gn/moz.build
index 0d652cc4171e..5fce348d4824 100644
--- a/third_party/libwebrtc/modules/audio_coding/ilbc_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_coding/ilbc_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -148,11 +147,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -177,6 +171,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -187,10 +188,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("ilbc_gn")
diff --git a/third_party/libwebrtc/modules/audio_coding/isac_bwinfo_gn/moz.build b/third_party/libwebrtc/modules/audio_coding/isac_bwinfo_gn/moz.build
index eb3d8253161c..0683c6b2c87f 100644
--- a/third_party/libwebrtc/modules/audio_coding/isac_bwinfo_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_coding/isac_bwinfo_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("isac_bwinfo_gn")
diff --git a/third_party/libwebrtc/modules/audio_coding/isac_c_gn/moz.build b/third_party/libwebrtc/modules/audio_coding/isac_c_gn/moz.build
index d8f18c763290..eb1ef5acdda3 100644
--- a/third_party/libwebrtc/modules/audio_coding/isac_c_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_coding/isac_c_gn/moz.build
@@ -99,7 +99,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -194,10 +193,20 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("isac_c_gn")
diff --git a/third_party/libwebrtc/modules/audio_coding/isac_common_gn/moz.build b/third_party/libwebrtc/modules/audio_coding/isac_common_gn/moz.build
index bab98e326822..c0022a8ed181 100644
--- a/third_party/libwebrtc/modules/audio_coding/isac_common_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_coding/isac_common_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -132,11 +131,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -161,10 +155,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("isac_common_gn")
diff --git a/third_party/libwebrtc/modules/audio_coding/isac_fix_c_arm_asm_gn/moz.build b/third_party/libwebrtc/modules/audio_coding/isac_fix_c_arm_asm_gn/moz.build
index 336fcedb8ddd..b33ee74804b9 100644
--- a/third_party/libwebrtc/modules/audio_coding/isac_fix_c_arm_asm_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_coding/isac_fix_c_arm_asm_gn/moz.build
@@ -10,12 +10,7 @@ COMPILE_FLAGS["OS_INCLUDES"] = []
 AllowCompilerWarnings()
 
 DEFINES["ABSL_ALLOCATOR_NOTHROW"] = "1"
-DEFINES["ANDROID"] = True
-DEFINES["ANDROID_NDK_VERSION_ROLL"] = "r20_1"
-DEFINES["HAVE_SYS_UIO_H"] = True
 DEFINES["RTC_ENABLE_VP9"] = True
-DEFINES["WEBRTC_ANDROID"] = True
-DEFINES["WEBRTC_ANDROID_OPENSLES"] = True
 DEFINES["WEBRTC_ARCH_ARM"] = True
 DEFINES["WEBRTC_ARCH_ARM_V7"] = True
 DEFINES["WEBRTC_ENABLE_PROTOBUF"] = "0"
@@ -40,12 +35,6 @@ LOCAL_INCLUDES += [
     "/tools/profiler/public"
 ]
 
-OS_LIBS += [
-    "android_support",
-    "log",
-    "unwind"
-]
-
 SOURCES += [
     "/third_party/libwebrtc/modules/audio_coding/codecs/isac/fix/source/lattice_armv7.S",
     "/third_party/libwebrtc/modules/audio_coding/codecs/isac/fix/source/pitch_filter_armv6.S"
@@ -62,4 +51,37 @@ if CONFIG["MOZ_DEBUG"] == "1":
     DEFINES["DYNAMIC_ANNOTATIONS_ENABLED"] = "1"
     DEFINES["_DEBUG"] = True
 
+if CONFIG["OS_TARGET"] == "Android":
+
+    DEFINES["ANDROID"] = True
+    DEFINES["ANDROID_NDK_VERSION_ROLL"] = "r20_1"
+    DEFINES["HAVE_SYS_UIO_H"] = True
+    DEFINES["WEBRTC_ANDROID"] = True
+    DEFINES["WEBRTC_ANDROID_OPENSLES"] = True
+
+    OS_LIBS += [
+        "android_support",
+        "log",
+        "unwind"
+    ]
+
+if CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["USE_AURA"] = "1"
+    DEFINES["USE_GLIB"] = "1"
+    DEFINES["USE_NSS_CERTS"] = "1"
+    DEFINES["USE_OZONE"] = "1"
+    DEFINES["USE_UDEV"] = True
+    DEFINES["_FILE_OFFSET_BITS"] = "64"
+    DEFINES["_LARGEFILE64_SOURCE"] = True
+    DEFINES["_LARGEFILE_SOURCE"] = True
+
+    OS_LIBS += [
+        "rt"
+    ]
+
+if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["USE_X11"] = "1"
+
 Library("isac_fix_c_arm_asm_gn")
diff --git a/third_party/libwebrtc/modules/audio_coding/isac_fix_c_gn/moz.build b/third_party/libwebrtc/modules/audio_coding/isac_fix_c_gn/moz.build
index 942213ff3a15..9c0d8289cf57 100644
--- a/third_party/libwebrtc/modules/audio_coding/isac_fix_c_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_coding/isac_fix_c_gn/moz.build
@@ -14,12 +14,7 @@ COMPILE_FLAGS["OS_INCLUDES"] = []
 AllowCompilerWarnings()
 
 DEFINES["ABSL_ALLOCATOR_NOTHROW"] = "1"
-DEFINES["ANDROID"] = True
-DEFINES["ANDROID_NDK_VERSION_ROLL"] = "r20_1"
-DEFINES["HAVE_SYS_UIO_H"] = True
 DEFINES["RTC_ENABLE_VP9"] = True
-DEFINES["WEBRTC_ANDROID"] = True
-DEFINES["WEBRTC_ANDROID_OPENSLES"] = True
 DEFINES["WEBRTC_ARCH_ARM"] = True
 DEFINES["WEBRTC_ARCH_ARM_V7"] = True
 DEFINES["WEBRTC_ENABLE_PROTOBUF"] = "0"
@@ -44,12 +39,6 @@ LOCAL_INCLUDES += [
     "/tools/profiler/public"
 ]
 
-OS_LIBS += [
-    "android_support",
-    "log",
-    "unwind"
-]
-
 SOURCES += [
     "/third_party/libwebrtc/modules/audio_coding/codecs/isac/fix/source/decode_plc.c",
     "/third_party/libwebrtc/modules/audio_coding/codecs/isac/fix/source/lpc_masking_model.c",
@@ -91,4 +80,37 @@ if CONFIG["MOZ_DEBUG"] == "1":
     DEFINES["DYNAMIC_ANNOTATIONS_ENABLED"] = "1"
     DEFINES["_DEBUG"] = True
 
+if CONFIG["OS_TARGET"] == "Android":
+
+    DEFINES["ANDROID"] = True
+    DEFINES["ANDROID_NDK_VERSION_ROLL"] = "r20_1"
+    DEFINES["HAVE_SYS_UIO_H"] = True
+    DEFINES["WEBRTC_ANDROID"] = True
+    DEFINES["WEBRTC_ANDROID_OPENSLES"] = True
+
+    OS_LIBS += [
+        "android_support",
+        "log",
+        "unwind"
+    ]
+
+if CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["USE_AURA"] = "1"
+    DEFINES["USE_GLIB"] = "1"
+    DEFINES["USE_NSS_CERTS"] = "1"
+    DEFINES["USE_OZONE"] = "1"
+    DEFINES["USE_UDEV"] = True
+    DEFINES["_FILE_OFFSET_BITS"] = "64"
+    DEFINES["_LARGEFILE64_SOURCE"] = True
+    DEFINES["_LARGEFILE_SOURCE"] = True
+
+    OS_LIBS += [
+        "rt"
+    ]
+
+if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["USE_X11"] = "1"
+
 Library("isac_fix_c_gn")
diff --git a/third_party/libwebrtc/modules/audio_coding/isac_fix_common_gn/moz.build b/third_party/libwebrtc/modules/audio_coding/isac_fix_common_gn/moz.build
index 3e34ed7bb4ab..a82133ba7d4b 100644
--- a/third_party/libwebrtc/modules/audio_coding/isac_fix_common_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_coding/isac_fix_common_gn/moz.build
@@ -14,12 +14,7 @@ COMPILE_FLAGS["OS_INCLUDES"] = []
 AllowCompilerWarnings()
 
 DEFINES["ABSL_ALLOCATOR_NOTHROW"] = "1"
-DEFINES["ANDROID"] = True
-DEFINES["ANDROID_NDK_VERSION_ROLL"] = "r20_1"
-DEFINES["HAVE_SYS_UIO_H"] = True
 DEFINES["RTC_ENABLE_VP9"] = True
-DEFINES["WEBRTC_ANDROID"] = True
-DEFINES["WEBRTC_ANDROID_OPENSLES"] = True
 DEFINES["WEBRTC_ARCH_ARM"] = True
 DEFINES["WEBRTC_ARCH_ARM_V7"] = True
 DEFINES["WEBRTC_ENABLE_PROTOBUF"] = "0"
@@ -44,12 +39,6 @@ LOCAL_INCLUDES += [
     "/tools/profiler/public"
 ]
 
-OS_LIBS += [
-    "android_support",
-    "log",
-    "unwind"
-]
-
 UNIFIED_SOURCES += [
     "/third_party/libwebrtc/modules/audio_coding/codecs/isac/fix/source/fft.c",
     "/third_party/libwebrtc/modules/audio_coding/codecs/isac/fix/source/transform_tables.c"
@@ -66,4 +55,37 @@ if CONFIG["MOZ_DEBUG"] == "1":
     DEFINES["DYNAMIC_ANNOTATIONS_ENABLED"] = "1"
     DEFINES["_DEBUG"] = True
 
+if CONFIG["OS_TARGET"] == "Android":
+
+    DEFINES["ANDROID"] = True
+    DEFINES["ANDROID_NDK_VERSION_ROLL"] = "r20_1"
+    DEFINES["HAVE_SYS_UIO_H"] = True
+    DEFINES["WEBRTC_ANDROID"] = True
+    DEFINES["WEBRTC_ANDROID_OPENSLES"] = True
+
+    OS_LIBS += [
+        "android_support",
+        "log",
+        "unwind"
+    ]
+
+if CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["USE_AURA"] = "1"
+    DEFINES["USE_GLIB"] = "1"
+    DEFINES["USE_NSS_CERTS"] = "1"
+    DEFINES["USE_OZONE"] = "1"
+    DEFINES["USE_UDEV"] = True
+    DEFINES["_FILE_OFFSET_BITS"] = "64"
+    DEFINES["_LARGEFILE64_SOURCE"] = True
+    DEFINES["_LARGEFILE_SOURCE"] = True
+
+    OS_LIBS += [
+        "rt"
+    ]
+
+if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["USE_X11"] = "1"
+
 Library("isac_fix_common_gn")
diff --git a/third_party/libwebrtc/modules/audio_coding/isac_fix_gn/moz.build b/third_party/libwebrtc/modules/audio_coding/isac_fix_gn/moz.build
index 6519449165dc..ef2586ee3467 100644
--- a/third_party/libwebrtc/modules/audio_coding/isac_fix_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_coding/isac_fix_gn/moz.build
@@ -14,12 +14,7 @@ CXXFLAGS += [
 ]
 
 DEFINES["ABSL_ALLOCATOR_NOTHROW"] = "1"
-DEFINES["ANDROID"] = True
-DEFINES["ANDROID_NDK_VERSION_ROLL"] = "r20_1"
-DEFINES["HAVE_SYS_UIO_H"] = True
 DEFINES["RTC_ENABLE_VP9"] = True
-DEFINES["WEBRTC_ANDROID"] = True
-DEFINES["WEBRTC_ANDROID_OPENSLES"] = True
 DEFINES["WEBRTC_ARCH_ARM"] = True
 DEFINES["WEBRTC_ARCH_ARM_V7"] = True
 DEFINES["WEBRTC_ENABLE_PROTOBUF"] = "0"
@@ -44,12 +39,6 @@ LOCAL_INCLUDES += [
     "/tools/profiler/public"
 ]
 
-OS_LIBS += [
-    "android_support",
-    "log",
-    "unwind"
-]
-
 UNIFIED_SOURCES += [
     "/third_party/libwebrtc/modules/audio_coding/codecs/isac/fix/source/audio_decoder_isacfix.cc",
     "/third_party/libwebrtc/modules/audio_coding/codecs/isac/fix/source/audio_encoder_isacfix.cc"
@@ -66,4 +55,37 @@ if CONFIG["MOZ_DEBUG"] == "1":
     DEFINES["DYNAMIC_ANNOTATIONS_ENABLED"] = "1"
     DEFINES["_DEBUG"] = True
 
+if CONFIG["OS_TARGET"] == "Android":
+
+    DEFINES["ANDROID"] = True
+    DEFINES["ANDROID_NDK_VERSION_ROLL"] = "r20_1"
+    DEFINES["HAVE_SYS_UIO_H"] = True
+    DEFINES["WEBRTC_ANDROID"] = True
+    DEFINES["WEBRTC_ANDROID_OPENSLES"] = True
+
+    OS_LIBS += [
+        "android_support",
+        "log",
+        "unwind"
+    ]
+
+if CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["USE_AURA"] = "1"
+    DEFINES["USE_GLIB"] = "1"
+    DEFINES["USE_NSS_CERTS"] = "1"
+    DEFINES["USE_OZONE"] = "1"
+    DEFINES["USE_UDEV"] = True
+    DEFINES["_FILE_OFFSET_BITS"] = "64"
+    DEFINES["_LARGEFILE64_SOURCE"] = True
+    DEFINES["_LARGEFILE_SOURCE"] = True
+
+    OS_LIBS += [
+        "rt"
+    ]
+
+if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["USE_X11"] = "1"
+
 Library("isac_fix_gn")
diff --git a/third_party/libwebrtc/modules/audio_coding/isac_gn/moz.build b/third_party/libwebrtc/modules/audio_coding/isac_gn/moz.build
index 67643f475ef7..fb8bd4934a8a 100644
--- a/third_party/libwebrtc/modules/audio_coding/isac_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_coding/isac_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -173,10 +172,20 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("isac_gn")
diff --git a/third_party/libwebrtc/modules/audio_coding/isac_neon_gn/moz.build b/third_party/libwebrtc/modules/audio_coding/isac_neon_gn/moz.build
index ee15808ac359..19ab4a510f4d 100644
--- a/third_party/libwebrtc/modules/audio_coding/isac_neon_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_coding/isac_neon_gn/moz.build
@@ -14,12 +14,7 @@ COMPILE_FLAGS["OS_INCLUDES"] = []
 AllowCompilerWarnings()
 
 DEFINES["ABSL_ALLOCATOR_NOTHROW"] = "1"
-DEFINES["ANDROID"] = True
-DEFINES["ANDROID_NDK_VERSION_ROLL"] = "r20_1"
-DEFINES["HAVE_SYS_UIO_H"] = True
 DEFINES["RTC_ENABLE_VP9"] = True
-DEFINES["WEBRTC_ANDROID"] = True
-DEFINES["WEBRTC_ANDROID_OPENSLES"] = True
 DEFINES["WEBRTC_ARCH_ARM"] = True
 DEFINES["WEBRTC_ARCH_ARM_V7"] = True
 DEFINES["WEBRTC_ENABLE_PROTOBUF"] = "0"
@@ -44,12 +39,6 @@ LOCAL_INCLUDES += [
     "/tools/profiler/public"
 ]
 
-OS_LIBS += [
-    "android_support",
-    "log",
-    "unwind"
-]
-
 UNIFIED_SOURCES += [
     "/third_party/libwebrtc/modules/audio_coding/codecs/isac/fix/source/entropy_coding_neon.c",
     "/third_party/libwebrtc/modules/audio_coding/codecs/isac/fix/source/filterbanks_neon.c",
@@ -69,4 +58,37 @@ if CONFIG["MOZ_DEBUG"] == "1":
     DEFINES["DYNAMIC_ANNOTATIONS_ENABLED"] = "1"
     DEFINES["_DEBUG"] = True
 
+if CONFIG["OS_TARGET"] == "Android":
+
+    DEFINES["ANDROID"] = True
+    DEFINES["ANDROID_NDK_VERSION_ROLL"] = "r20_1"
+    DEFINES["HAVE_SYS_UIO_H"] = True
+    DEFINES["WEBRTC_ANDROID"] = True
+    DEFINES["WEBRTC_ANDROID_OPENSLES"] = True
+
+    OS_LIBS += [
+        "android_support",
+        "log",
+        "unwind"
+    ]
+
+if CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["USE_AURA"] = "1"
+    DEFINES["USE_GLIB"] = "1"
+    DEFINES["USE_NSS_CERTS"] = "1"
+    DEFINES["USE_OZONE"] = "1"
+    DEFINES["USE_UDEV"] = True
+    DEFINES["_FILE_OFFSET_BITS"] = "64"
+    DEFINES["_LARGEFILE64_SOURCE"] = True
+    DEFINES["_LARGEFILE_SOURCE"] = True
+
+    OS_LIBS += [
+        "rt"
+    ]
+
+if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["USE_X11"] = "1"
+
 Library("isac_neon_gn")
diff --git a/third_party/libwebrtc/modules/audio_coding/isac_vad_gn/moz.build b/third_party/libwebrtc/modules/audio_coding/isac_vad_gn/moz.build
index a971d4ce4a2b..32e0bdbeae79 100644
--- a/third_party/libwebrtc/modules/audio_coding/isac_vad_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_coding/isac_vad_gn/moz.build
@@ -76,7 +76,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -135,11 +134,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -164,6 +158,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CFLAGS += [
@@ -174,10 +175,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("isac_vad_gn")
diff --git a/third_party/libwebrtc/modules/audio_coding/legacy_encoded_audio_frame_gn/moz.build b/third_party/libwebrtc/modules/audio_coding/legacy_encoded_audio_frame_gn/moz.build
index 9ef5e6408a8f..18350301d248 100644
--- a/third_party/libwebrtc/modules/audio_coding/legacy_encoded_audio_frame_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_coding/legacy_encoded_audio_frame_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("legacy_encoded_audio_frame_gn")
diff --git a/third_party/libwebrtc/modules/audio_coding/neteq_gn/moz.build b/third_party/libwebrtc/modules/audio_coding/neteq_gn/moz.build
index 882dc1f89820..12652118fcd3 100644
--- a/third_party/libwebrtc/modules/audio_coding/neteq_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_coding/neteq_gn/moz.build
@@ -109,7 +109,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -179,11 +178,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -208,6 +202,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -218,10 +219,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("neteq_gn")
diff --git a/third_party/libwebrtc/modules/audio_coding/pcm16b_c_gn/moz.build b/third_party/libwebrtc/modules/audio_coding/pcm16b_c_gn/moz.build
index 4dbfac431097..0e1653a5e920 100644
--- a/third_party/libwebrtc/modules/audio_coding/pcm16b_c_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_coding/pcm16b_c_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -132,11 +131,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -161,6 +155,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CFLAGS += [
@@ -171,10 +172,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("pcm16b_c_gn")
diff --git a/third_party/libwebrtc/modules/audio_coding/pcm16b_gn/moz.build b/third_party/libwebrtc/modules/audio_coding/pcm16b_gn/moz.build
index 22fbf1424a20..9672bdd6e442 100644
--- a/third_party/libwebrtc/modules/audio_coding/pcm16b_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_coding/pcm16b_gn/moz.build
@@ -79,7 +79,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -142,11 +141,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -171,6 +165,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -181,10 +182,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("pcm16b_gn")
diff --git a/third_party/libwebrtc/modules/audio_coding/red_gn/moz.build b/third_party/libwebrtc/modules/audio_coding/red_gn/moz.build
index 62d3307e1e4c..78fa81b88eb3 100644
--- a/third_party/libwebrtc/modules/audio_coding/red_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_coding/red_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -147,11 +146,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -176,6 +170,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -186,10 +187,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("red_gn")
diff --git a/third_party/libwebrtc/modules/audio_coding/webrtc_cng_gn/moz.build b/third_party/libwebrtc/modules/audio_coding/webrtc_cng_gn/moz.build
index a8aa730cddf3..9bc743df7706 100644
--- a/third_party/libwebrtc/modules/audio_coding/webrtc_cng_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_coding/webrtc_cng_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -147,11 +146,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -176,6 +170,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -186,10 +187,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("webrtc_cng_gn")
diff --git a/third_party/libwebrtc/modules/audio_coding/webrtc_multiopus_gn/moz.build b/third_party/libwebrtc/modules/audio_coding/webrtc_multiopus_gn/moz.build
index 55f35682dc9b..4d11b7c7a093 100644
--- a/third_party/libwebrtc/modules/audio_coding/webrtc_multiopus_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_coding/webrtc_multiopus_gn/moz.build
@@ -80,11 +80,9 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["USE_NSS_CERTS"] = "1"
     DEFINES["USE_OZONE"] = "1"
     DEFINES["USE_UDEV"] = True
-    DEFINES["WEBRTC_CODEC_ISAC"] = True
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -150,10 +148,9 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_CODEC_ISACFX"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
+if CONFIG["CPU_ARCH"] == "ppc64":
+
+    DEFINES["WEBRTC_CODEC_ISAC"] = True
 
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
@@ -183,6 +180,13 @@ if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["WEBRTC_CODEC_ISAC"] = True
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -199,10 +203,27 @@ if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["WEBRTC_CODEC_ISAC"] = True
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["WEBRTC_CODEC_ISAC"] = True
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["WEBRTC_CODEC_ISAC"] = True
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["WEBRTC_CODEC_ISAC"] = True
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("webrtc_multiopus_gn")
diff --git a/third_party/libwebrtc/modules/audio_coding/webrtc_opus_gn/moz.build b/third_party/libwebrtc/modules/audio_coding/webrtc_opus_gn/moz.build
index 6116ed7522cb..b3eddbf6d7e2 100644
--- a/third_party/libwebrtc/modules/audio_coding/webrtc_opus_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_coding/webrtc_opus_gn/moz.build
@@ -80,11 +80,9 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["USE_NSS_CERTS"] = "1"
     DEFINES["USE_OZONE"] = "1"
     DEFINES["USE_UDEV"] = True
-    DEFINES["WEBRTC_CODEC_ISAC"] = True
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -157,10 +155,9 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_CODEC_ISACFX"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
+if CONFIG["CPU_ARCH"] == "ppc64":
+
+    DEFINES["WEBRTC_CODEC_ISAC"] = True
 
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
@@ -190,6 +187,13 @@ if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["WEBRTC_CODEC_ISAC"] = True
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -206,10 +210,27 @@ if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["WEBRTC_CODEC_ISAC"] = True
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["WEBRTC_CODEC_ISAC"] = True
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["WEBRTC_CODEC_ISAC"] = True
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["WEBRTC_CODEC_ISAC"] = True
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("webrtc_opus_gn")
diff --git a/third_party/libwebrtc/modules/audio_coding/webrtc_opus_wrapper_gn/moz.build b/third_party/libwebrtc/modules/audio_coding/webrtc_opus_wrapper_gn/moz.build
index cf1ce68fe65c..0a9b82df14c1 100644
--- a/third_party/libwebrtc/modules/audio_coding/webrtc_opus_wrapper_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_coding/webrtc_opus_wrapper_gn/moz.build
@@ -79,11 +79,9 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["USE_NSS_CERTS"] = "1"
     DEFINES["USE_OZONE"] = "1"
     DEFINES["USE_UDEV"] = True
-    DEFINES["WEBRTC_CODEC_ISAC"] = True
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -149,10 +147,9 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_CODEC_ISACFX"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
+if CONFIG["CPU_ARCH"] == "ppc64":
+
+    DEFINES["WEBRTC_CODEC_ISAC"] = True
 
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
@@ -182,6 +179,13 @@ if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["WEBRTC_CODEC_ISAC"] = True
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -198,10 +202,27 @@ if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["WEBRTC_CODEC_ISAC"] = True
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["WEBRTC_CODEC_ISAC"] = True
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["WEBRTC_CODEC_ISAC"] = True
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["WEBRTC_CODEC_ISAC"] = True
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("webrtc_opus_wrapper_gn")
diff --git a/third_party/libwebrtc/modules/audio_device/audio_device_api_gn/moz.build b/third_party/libwebrtc/modules/audio_device/audio_device_api_gn/moz.build
index 65a933040e78..398c2da306fc 100644
--- a/third_party/libwebrtc/modules/audio_device/audio_device_api_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_device/audio_device_api_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -132,11 +131,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -161,10 +155,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_device_api_gn")
diff --git a/third_party/libwebrtc/modules/audio_device/audio_device_buffer_gn/moz.build b/third_party/libwebrtc/modules/audio_device/audio_device_buffer_gn/moz.build
index a3f47c475320..1195b231c063 100644
--- a/third_party/libwebrtc/modules/audio_device/audio_device_buffer_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_device/audio_device_buffer_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -148,11 +147,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -177,6 +171,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -187,10 +188,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_device_buffer_gn")
diff --git a/third_party/libwebrtc/modules/audio_device/audio_device_default_gn/moz.build b/third_party/libwebrtc/modules/audio_device/audio_device_default_gn/moz.build
index 460ea0ac4dc2..724e242ca3ef 100644
--- a/third_party/libwebrtc/modules/audio_device/audio_device_default_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_device/audio_device_default_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -132,11 +131,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -161,10 +155,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_device_default_gn")
diff --git a/third_party/libwebrtc/modules/audio_device/audio_device_generic_gn/moz.build b/third_party/libwebrtc/modules/audio_device/audio_device_generic_gn/moz.build
index a13477171665..f08e5c8e02b8 100644
--- a/third_party/libwebrtc/modules/audio_device/audio_device_generic_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_device/audio_device_generic_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -147,11 +146,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -176,6 +170,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -186,10 +187,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_device_generic_gn")
diff --git a/third_party/libwebrtc/modules/audio_device/audio_device_gn/moz.build b/third_party/libwebrtc/modules/audio_device/audio_device_gn/moz.build
index e6ea7b25b211..0cfaae2eb2e9 100644
--- a/third_party/libwebrtc/modules/audio_device/audio_device_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_device/audio_device_gn/moz.build
@@ -74,7 +74,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -141,11 +140,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -170,10 +164,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_device_gn")
diff --git a/third_party/libwebrtc/modules/audio_device/audio_device_impl_gn/moz.build b/third_party/libwebrtc/modules/audio_device/audio_device_impl_gn/moz.build
index 68d2fffa0e76..1f4c26e74a73 100644
--- a/third_party/libwebrtc/modules/audio_device/audio_device_impl_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_device/audio_device_impl_gn/moz.build
@@ -81,7 +81,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -152,11 +151,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -181,6 +175,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -191,10 +192,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_device_impl_gn")
diff --git a/third_party/libwebrtc/modules/audio_mixer/audio_frame_manipulator_gn/moz.build b/third_party/libwebrtc/modules/audio_mixer/audio_frame_manipulator_gn/moz.build
index 41b57be0f8ff..f514687c3e94 100644
--- a/third_party/libwebrtc/modules/audio_mixer/audio_frame_manipulator_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_mixer/audio_frame_manipulator_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -147,11 +146,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -176,6 +170,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -186,10 +187,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_frame_manipulator_gn")
diff --git a/third_party/libwebrtc/modules/audio_mixer/audio_mixer_impl_gn/moz.build b/third_party/libwebrtc/modules/audio_mixer/audio_mixer_impl_gn/moz.build
index 5cbe329132d7..65eb95889500 100644
--- a/third_party/libwebrtc/modules/audio_mixer/audio_mixer_impl_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_mixer/audio_mixer_impl_gn/moz.build
@@ -80,7 +80,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -150,11 +149,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -179,6 +173,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -189,10 +190,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_mixer_impl_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/aec3/adaptive_fir_filter_erl_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/aec3/adaptive_fir_filter_erl_gn/moz.build
index 89a1b0ec712d..b9b954b26e57 100644
--- a/third_party/libwebrtc/modules/audio_processing/aec3/adaptive_fir_filter_erl_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/aec3/adaptive_fir_filter_erl_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -128,11 +127,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -157,10 +151,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("adaptive_fir_filter_erl_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/aec3/adaptive_fir_filter_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/aec3/adaptive_fir_filter_gn/moz.build
index 3b43e12c2739..93cb37e76226 100644
--- a/third_party/libwebrtc/modules/audio_processing/aec3/adaptive_fir_filter_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/aec3/adaptive_fir_filter_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -139,11 +138,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -168,10 +162,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("adaptive_fir_filter_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/aec3/aec3_common_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/aec3/aec3_common_gn/moz.build
index 06c143a785fa..fde5dd657ee8 100644
--- a/third_party/libwebrtc/modules/audio_processing/aec3/aec3_common_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/aec3/aec3_common_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("aec3_common_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/aec3/aec3_fft_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/aec3/aec3_fft_gn/moz.build
index 04abed02af5f..6d54ad479d4c 100644
--- a/third_party/libwebrtc/modules/audio_processing/aec3/aec3_fft_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/aec3/aec3_fft_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -139,11 +138,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -168,10 +162,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("aec3_fft_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/aec3/aec3_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/aec3/aec3_gn/moz.build
index f717d4816d85..23619827e1e9 100644
--- a/third_party/libwebrtc/modules/audio_processing/aec3/aec3_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/aec3/aec3_gn/moz.build
@@ -131,7 +131,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -201,11 +200,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -230,6 +224,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -240,10 +241,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("aec3_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/aec3/fft_data_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/aec3/fft_data_gn/moz.build
index da5d15410423..12998c4b029b 100644
--- a/third_party/libwebrtc/modules/audio_processing/aec3/fft_data_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/aec3/fft_data_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -128,11 +127,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -157,10 +151,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("fft_data_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/aec3/matched_filter_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/aec3/matched_filter_gn/moz.build
index 4692cb251639..363190680672 100644
--- a/third_party/libwebrtc/modules/audio_processing/aec3/matched_filter_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/aec3/matched_filter_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -132,11 +131,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -161,10 +155,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("matched_filter_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/aec3/render_buffer_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/aec3/render_buffer_gn/moz.build
index f56004683578..622012d48c36 100644
--- a/third_party/libwebrtc/modules/audio_processing/aec3/render_buffer_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/aec3/render_buffer_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -132,11 +131,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -161,10 +155,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("render_buffer_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/aec3/vector_math_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/aec3/vector_math_gn/moz.build
index 92876ea8491b..b4829b141af4 100644
--- a/third_party/libwebrtc/modules/audio_processing/aec3/vector_math_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/aec3/vector_math_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -128,11 +127,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -157,10 +151,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("vector_math_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/aec_dump/aec_dump_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/aec_dump/aec_dump_gn/moz.build
index 9a95549629ac..1eb77fe2feac 100644
--- a/third_party/libwebrtc/modules/audio_processing/aec_dump/aec_dump_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/aec_dump/aec_dump_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -132,11 +131,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -161,10 +155,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("aec_dump_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/aec_dump/null_aec_dump_factory_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/aec_dump/null_aec_dump_factory_gn/moz.build
index 6889a9ee08eb..49b34c44cb0e 100644
--- a/third_party/libwebrtc/modules/audio_processing/aec_dump/null_aec_dump_factory_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/aec_dump/null_aec_dump_factory_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("null_aec_dump_factory_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/aec_dump_interface_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/aec_dump_interface_gn/moz.build
index f801c7320d66..65b987429c4e 100644
--- a/third_party/libwebrtc/modules/audio_processing/aec_dump_interface_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/aec_dump_interface_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("aec_dump_interface_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/aecm/aecm_core_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/aecm/aecm_core_gn/moz.build
index 5b021c7d67f0..f317d9be88ee 100644
--- a/third_party/libwebrtc/modules/audio_processing/aecm/aecm_core_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/aecm/aecm_core_gn/moz.build
@@ -79,7 +79,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -153,11 +152,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
     SOURCES += [
         "/third_party/libwebrtc/modules/audio_processing/aecm/aecm_core_neon.cc"
     ]
@@ -186,6 +180,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -196,10 +197,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("aecm_core_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/agc/agc_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/agc/agc_gn/moz.build
index 0f0058edcae4..ff59d4de4fb8 100644
--- a/third_party/libwebrtc/modules/audio_processing/agc/agc_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/agc/agc_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -148,11 +147,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -177,6 +171,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -187,10 +188,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("agc_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/agc/gain_control_interface_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/agc/gain_control_interface_gn/moz.build
index 98f88f432bcb..7efc673f0c5b 100644
--- a/third_party/libwebrtc/modules/audio_processing/agc/gain_control_interface_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/agc/gain_control_interface_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("gain_control_interface_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/agc/gain_map_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/agc/gain_map_gn/moz.build
index 7b92fa5b90ff..6728434078cf 100644
--- a/third_party/libwebrtc/modules/audio_processing/agc/gain_map_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/agc/gain_map_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("gain_map_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/agc/legacy_agc_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/agc/legacy_agc_gn/moz.build
index 0e7f762a3060..270cb5d3a7c7 100644
--- a/third_party/libwebrtc/modules/audio_processing/agc/legacy_agc_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/agc/legacy_agc_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -148,11 +147,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -177,6 +171,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -187,10 +188,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("legacy_agc_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/agc/level_estimation_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/agc/level_estimation_gn/moz.build
index bfdf2aec61c2..befd830a176c 100644
--- a/third_party/libwebrtc/modules/audio_processing/agc/level_estimation_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/agc/level_estimation_gn/moz.build
@@ -79,7 +79,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -149,11 +148,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -178,6 +172,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -188,10 +189,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("level_estimation_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/agc2/adaptive_digital_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/agc2/adaptive_digital_gn/moz.build
index ea3faba36529..d303a108d72b 100644
--- a/third_party/libwebrtc/modules/audio_processing/agc2/adaptive_digital_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/agc2/adaptive_digital_gn/moz.build
@@ -81,7 +81,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -151,11 +150,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -180,6 +174,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -190,10 +191,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("adaptive_digital_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/agc2/biquad_filter_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/agc2/biquad_filter_gn/moz.build
index 45789c7f3136..d0bfd82c2350 100644
--- a/third_party/libwebrtc/modules/audio_processing/agc2/biquad_filter_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/agc2/biquad_filter_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("biquad_filter_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/agc2/common_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/agc2/common_gn/moz.build
index daace115cd26..5ff8ddf35df1 100644
--- a/third_party/libwebrtc/modules/audio_processing/agc2/common_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/agc2/common_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("common_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/agc2/fixed_digital_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/agc2/fixed_digital_gn/moz.build
index 6d17ac92d944..5791bea212ad 100644
--- a/third_party/libwebrtc/modules/audio_processing/agc2/fixed_digital_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/agc2/fixed_digital_gn/moz.build
@@ -80,7 +80,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -150,11 +149,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -179,6 +173,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -189,10 +190,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("fixed_digital_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/agc2/gain_applier_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/agc2/gain_applier_gn/moz.build
index 96393113ec26..d4ffe13d2d76 100644
--- a/third_party/libwebrtc/modules/audio_processing/agc2/gain_applier_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/agc2/gain_applier_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("gain_applier_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/agc2/level_estimation_agc_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/agc2/level_estimation_agc_gn/moz.build
index 02acca07dae0..27a0931eab96 100644
--- a/third_party/libwebrtc/modules/audio_processing/agc2/level_estimation_agc_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/agc2/level_estimation_agc_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -148,11 +147,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -177,6 +171,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -187,10 +188,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("level_estimation_agc_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/agc2/noise_level_estimator_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/agc2/noise_level_estimator_gn/moz.build
index 7dcbcb872073..1076a2eaf57a 100644
--- a/third_party/libwebrtc/modules/audio_processing/agc2/noise_level_estimator_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/agc2/noise_level_estimator_gn/moz.build
@@ -81,7 +81,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -151,11 +150,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -180,6 +174,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -190,10 +191,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("noise_level_estimator_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/agc2/rnn_vad/rnn_vad_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/agc2/rnn_vad/rnn_vad_gn/moz.build
index b57522fefb2b..eef4b67a679a 100644
--- a/third_party/libwebrtc/modules/audio_processing/agc2/rnn_vad/rnn_vad_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/agc2/rnn_vad/rnn_vad_gn/moz.build
@@ -85,7 +85,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -155,11 +154,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -184,6 +178,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -194,10 +195,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rnn_vad_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/agc2/rnn_vad_with_level_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/agc2/rnn_vad_with_level_gn/moz.build
index ddfc187a2a41..7f05fd14ac56 100644
--- a/third_party/libwebrtc/modules/audio_processing/agc2/rnn_vad_with_level_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/agc2/rnn_vad_with_level_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -147,11 +146,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -176,6 +170,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -186,10 +187,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rnn_vad_with_level_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/api_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/api_gn/moz.build
index 9ffa477f3d7a..bf4851218d28 100644
--- a/third_party/libwebrtc/modules/audio_processing/api_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/api_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("api_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/apm_logging_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/apm_logging_gn/moz.build
index f12a13157226..64e2efdac206 100644
--- a/third_party/libwebrtc/modules/audio_processing/apm_logging_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/apm_logging_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -148,11 +147,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -177,6 +171,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -187,10 +188,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("apm_logging_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/audio_buffer_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/audio_buffer_gn/moz.build
index 1b381a50fb75..d9d1873676a1 100644
--- a/third_party/libwebrtc/modules/audio_processing/audio_buffer_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/audio_buffer_gn/moz.build
@@ -80,7 +80,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -150,11 +149,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -179,6 +173,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -189,10 +190,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_buffer_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/audio_frame_proxies_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/audio_frame_proxies_gn/moz.build
index 407b8f8393a5..bebdf8902351 100644
--- a/third_party/libwebrtc/modules/audio_processing/audio_frame_proxies_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/audio_frame_proxies_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_frame_proxies_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/audio_frame_view_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/audio_frame_view_gn/moz.build
index 25b89da6ccf3..4eab83119b7c 100644
--- a/third_party/libwebrtc/modules/audio_processing/audio_frame_view_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/audio_frame_view_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -128,11 +127,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -157,10 +151,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_frame_view_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/audio_processing_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/audio_processing_gn/moz.build
index a88d94b9f6a0..9aa3972d9a7a 100644
--- a/third_party/libwebrtc/modules/audio_processing/audio_processing_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/audio_processing_gn/moz.build
@@ -92,7 +92,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -162,11 +161,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -191,6 +185,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -201,10 +202,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_processing_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/audio_processing_statistics_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/audio_processing_statistics_gn/moz.build
index 49b23f7d0ed2..9dc4eaa94e7c 100644
--- a/third_party/libwebrtc/modules/audio_processing/audio_processing_statistics_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/audio_processing_statistics_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -132,11 +131,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -161,6 +155,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -171,10 +172,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_processing_statistics_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/config_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/config_gn/moz.build
index b8853ffb05cf..985e8a18b2fb 100644
--- a/third_party/libwebrtc/modules/audio_processing/config_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/config_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -132,11 +131,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -161,6 +155,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -171,10 +172,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("config_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/high_pass_filter_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/high_pass_filter_gn/moz.build
index 28f8d446f72c..288bc97f7b77 100644
--- a/third_party/libwebrtc/modules/audio_processing/high_pass_filter_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/high_pass_filter_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -147,11 +146,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -176,6 +170,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -186,10 +187,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("high_pass_filter_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/ns/ns_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/ns/ns_gn/moz.build
index 23e6495dae9f..83f15c9be09c 100644
--- a/third_party/libwebrtc/modules/audio_processing/ns/ns_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/ns/ns_gn/moz.build
@@ -90,7 +90,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -160,11 +159,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -189,6 +183,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -199,10 +200,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("ns_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/optionally_built_submodule_creators_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/optionally_built_submodule_creators_gn/moz.build
index baf8485cdaa6..a86d75480786 100644
--- a/third_party/libwebrtc/modules/audio_processing/optionally_built_submodule_creators_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/optionally_built_submodule_creators_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -147,11 +146,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -176,6 +170,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -186,10 +187,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("optionally_built_submodule_creators_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/rms_level_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/rms_level_gn/moz.build
index 2abe991fd3e7..734ed34f2a42 100644
--- a/third_party/libwebrtc/modules/audio_processing/rms_level_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/rms_level_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -136,11 +135,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -165,6 +159,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -175,10 +176,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rms_level_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/transient/transient_suppressor_api_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/transient/transient_suppressor_api_gn/moz.build
index 6f9845056130..910a0f6b47e4 100644
--- a/third_party/libwebrtc/modules/audio_processing/transient/transient_suppressor_api_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/transient/transient_suppressor_api_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("transient_suppressor_api_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/transient/transient_suppressor_impl_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/transient/transient_suppressor_impl_gn/moz.build
index fe2e90bf6824..01778a276399 100644
--- a/third_party/libwebrtc/modules/audio_processing/transient/transient_suppressor_impl_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/transient/transient_suppressor_impl_gn/moz.build
@@ -81,7 +81,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -151,11 +150,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -180,6 +174,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -190,10 +191,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("transient_suppressor_impl_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/utility/cascaded_biquad_filter_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/utility/cascaded_biquad_filter_gn/moz.build
index 041b61bc60f4..e916a2df4b02 100644
--- a/third_party/libwebrtc/modules/audio_processing/utility/cascaded_biquad_filter_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/utility/cascaded_biquad_filter_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -136,11 +135,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -165,6 +159,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -175,10 +176,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("cascaded_biquad_filter_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/utility/legacy_delay_estimator_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/utility/legacy_delay_estimator_gn/moz.build
index 95b28f4ccf94..ba9ff2aa76c9 100644
--- a/third_party/libwebrtc/modules/audio_processing/utility/legacy_delay_estimator_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/utility/legacy_delay_estimator_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -137,11 +136,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -166,6 +160,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -176,10 +177,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("legacy_delay_estimator_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/utility/pffft_wrapper_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/utility/pffft_wrapper_gn/moz.build
index a85468c9b3da..1884650643cd 100644
--- a/third_party/libwebrtc/modules/audio_processing/utility/pffft_wrapper_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/utility/pffft_wrapper_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -136,11 +135,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -165,6 +159,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -175,10 +176,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("pffft_wrapper_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/vad/vad_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/vad/vad_gn/moz.build
index 6b016b8bddcf..e06accb998fa 100644
--- a/third_party/libwebrtc/modules/audio_processing/vad/vad_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/vad/vad_gn/moz.build
@@ -84,7 +84,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -154,11 +153,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -183,6 +177,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -193,10 +194,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("vad_gn")
diff --git a/third_party/libwebrtc/modules/audio_processing/voice_detection_gn/moz.build b/third_party/libwebrtc/modules/audio_processing/voice_detection_gn/moz.build
index f261c0f6334c..8ef40909b1e9 100644
--- a/third_party/libwebrtc/modules/audio_processing/voice_detection_gn/moz.build
+++ b/third_party/libwebrtc/modules/audio_processing/voice_detection_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -147,11 +146,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -176,6 +170,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -186,10 +187,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("voice_detection_gn")
diff --git a/third_party/libwebrtc/modules/congestion_controller/congestion_controller_gn/moz.build b/third_party/libwebrtc/modules/congestion_controller/congestion_controller_gn/moz.build
index 4611d86993be..2d13d2a8ca67 100644
--- a/third_party/libwebrtc/modules/congestion_controller/congestion_controller_gn/moz.build
+++ b/third_party/libwebrtc/modules/congestion_controller/congestion_controller_gn/moz.build
@@ -79,7 +79,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -150,11 +149,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -179,6 +173,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -189,10 +190,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("congestion_controller_gn")
diff --git a/third_party/libwebrtc/modules/congestion_controller/goog_cc/alr_detector_gn/moz.build b/third_party/libwebrtc/modules/congestion_controller/goog_cc/alr_detector_gn/moz.build
index d43a872df5fe..a991b965ece6 100644
--- a/third_party/libwebrtc/modules/congestion_controller/goog_cc/alr_detector_gn/moz.build
+++ b/third_party/libwebrtc/modules/congestion_controller/goog_cc/alr_detector_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("alr_detector_gn")
diff --git a/third_party/libwebrtc/modules/congestion_controller/goog_cc/delay_based_bwe_gn/moz.build b/third_party/libwebrtc/modules/congestion_controller/goog_cc/delay_based_bwe_gn/moz.build
index 0af5c94f3eaa..1b862f9fa48b 100644
--- a/third_party/libwebrtc/modules/congestion_controller/goog_cc/delay_based_bwe_gn/moz.build
+++ b/third_party/libwebrtc/modules/congestion_controller/goog_cc/delay_based_bwe_gn/moz.build
@@ -79,7 +79,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -150,11 +149,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -179,6 +173,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -189,10 +190,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("delay_based_bwe_gn")
diff --git a/third_party/libwebrtc/modules/congestion_controller/goog_cc/estimators_gn/moz.build b/third_party/libwebrtc/modules/congestion_controller/goog_cc/estimators_gn/moz.build
index 6b2742cef153..49b461e41162 100644
--- a/third_party/libwebrtc/modules/congestion_controller/goog_cc/estimators_gn/moz.build
+++ b/third_party/libwebrtc/modules/congestion_controller/goog_cc/estimators_gn/moz.build
@@ -84,7 +84,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -155,11 +154,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -184,6 +178,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -194,10 +195,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("estimators_gn")
diff --git a/third_party/libwebrtc/modules/congestion_controller/goog_cc/goog_cc_gn/moz.build b/third_party/libwebrtc/modules/congestion_controller/goog_cc/goog_cc_gn/moz.build
index f2bd32521255..df17f5d59fe4 100644
--- a/third_party/libwebrtc/modules/congestion_controller/goog_cc/goog_cc_gn/moz.build
+++ b/third_party/libwebrtc/modules/congestion_controller/goog_cc/goog_cc_gn/moz.build
@@ -79,7 +79,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -150,11 +149,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -179,6 +173,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -189,10 +190,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("goog_cc_gn")
diff --git a/third_party/libwebrtc/modules/congestion_controller/goog_cc/link_capacity_estimator_gn/moz.build b/third_party/libwebrtc/modules/congestion_controller/goog_cc/link_capacity_estimator_gn/moz.build
index b20e96279d00..90860d224cff 100644
--- a/third_party/libwebrtc/modules/congestion_controller/goog_cc/link_capacity_estimator_gn/moz.build
+++ b/third_party/libwebrtc/modules/congestion_controller/goog_cc/link_capacity_estimator_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -136,11 +135,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -165,6 +159,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -175,10 +176,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("link_capacity_estimator_gn")
diff --git a/third_party/libwebrtc/modules/congestion_controller/goog_cc/loss_based_controller_gn/moz.build b/third_party/libwebrtc/modules/congestion_controller/goog_cc/loss_based_controller_gn/moz.build
index 09fe25f5ea8d..343754d93659 100644
--- a/third_party/libwebrtc/modules/congestion_controller/goog_cc/loss_based_controller_gn/moz.build
+++ b/third_party/libwebrtc/modules/congestion_controller/goog_cc/loss_based_controller_gn/moz.build
@@ -80,7 +80,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -151,11 +150,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -180,6 +174,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -190,10 +191,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("loss_based_controller_gn")
diff --git a/third_party/libwebrtc/modules/congestion_controller/goog_cc/probe_controller_gn/moz.build b/third_party/libwebrtc/modules/congestion_controller/goog_cc/probe_controller_gn/moz.build
index 41cad986c2bb..6ee25f7b9dae 100644
--- a/third_party/libwebrtc/modules/congestion_controller/goog_cc/probe_controller_gn/moz.build
+++ b/third_party/libwebrtc/modules/congestion_controller/goog_cc/probe_controller_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -149,11 +148,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -178,6 +172,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -188,10 +189,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("probe_controller_gn")
diff --git a/third_party/libwebrtc/modules/congestion_controller/goog_cc/pushback_controller_gn/moz.build b/third_party/libwebrtc/modules/congestion_controller/goog_cc/pushback_controller_gn/moz.build
index d74a42bcf8f2..b741f49e9134 100644
--- a/third_party/libwebrtc/modules/congestion_controller/goog_cc/pushback_controller_gn/moz.build
+++ b/third_party/libwebrtc/modules/congestion_controller/goog_cc/pushback_controller_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("pushback_controller_gn")
diff --git a/third_party/libwebrtc/modules/congestion_controller/rtp/control_handler_gn/moz.build b/third_party/libwebrtc/modules/congestion_controller/rtp/control_handler_gn/moz.build
index ddc97bbf20c5..95460fd8514b 100644
--- a/third_party/libwebrtc/modules/congestion_controller/rtp/control_handler_gn/moz.build
+++ b/third_party/libwebrtc/modules/congestion_controller/rtp/control_handler_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -149,11 +148,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -178,6 +172,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -188,10 +189,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("control_handler_gn")
diff --git a/third_party/libwebrtc/modules/congestion_controller/rtp/transport_feedback_gn/moz.build b/third_party/libwebrtc/modules/congestion_controller/rtp/transport_feedback_gn/moz.build
index 2bef4c93c28b..691dd4a4489a 100644
--- a/third_party/libwebrtc/modules/congestion_controller/rtp/transport_feedback_gn/moz.build
+++ b/third_party/libwebrtc/modules/congestion_controller/rtp/transport_feedback_gn/moz.build
@@ -79,7 +79,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -150,11 +149,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -179,6 +173,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -189,10 +190,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("transport_feedback_gn")
diff --git a/third_party/libwebrtc/modules/desktop_capture/desktop_capture_generic_gn/moz.build b/third_party/libwebrtc/modules/desktop_capture/desktop_capture_generic_gn/moz.build
index c4e4933bb713..d5e8525ed124 100644
--- a/third_party/libwebrtc/modules/desktop_capture/desktop_capture_generic_gn/moz.build
+++ b/third_party/libwebrtc/modules/desktop_capture/desktop_capture_generic_gn/moz.build
@@ -90,9 +90,7 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["USE_UDEV"] = True
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
-    DEFINES["WEBRTC_USE_PIPEWIRE"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -103,13 +101,7 @@ if CONFIG["OS_TARGET"] == "Linux":
         "rt"
     ]
 
-    SOURCES += [
-        "/third_party/libwebrtc/modules/desktop_capture/linux/base_capturer_pipewire.cc"
-    ]
-
     UNIFIED_SOURCES += [
-        "/third_party/libwebrtc/modules/desktop_capture/linux/screen_capturer_pipewire.cc",
-        "/third_party/libwebrtc/modules/desktop_capture/linux/window_capturer_pipewire.cc",
         "/third_party/libwebrtc/modules/desktop_capture/mouse_cursor_monitor_linux.cc",
         "/third_party/libwebrtc/modules/desktop_capture/screen_capturer_linux.cc",
         "/third_party/libwebrtc/modules/desktop_capture/window_capturer_linux.cc"
@@ -236,23 +228,28 @@ if CONFIG["CPU_ARCH"] == "aarch64":
     DEFINES["WEBRTC_ARCH_ARM64"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Darwin":
+if CONFIG["CPU_ARCH"] == "arm":
 
-    DEFINES["_DEBUG"] = True
+    CXXFLAGS += [
+        "-mfpu=neon"
+    ]
 
-if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Linux":
+    DEFINES["WEBRTC_ARCH_ARM"] = True
+    DEFINES["WEBRTC_ARCH_ARM_V7"] = True
+    DEFINES["WEBRTC_HAS_NEON"] = True
+    DEFINES["WEBRTC_USE_PIPEWIRE"] = True
+    DEFINES["_GNU_SOURCE"] = True
 
-    DEFINES["_DEBUG"] = True
+    SOURCES += [
+        "/third_party/libwebrtc/modules/desktop_capture/linux/base_capturer_pipewire.cc"
+    ]
 
-if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "OpenBSD":
+    UNIFIED_SOURCES += [
+        "/third_party/libwebrtc/modules/desktop_capture/linux/screen_capturer_pipewire.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/window_capturer_pipewire.cc"
+    ]
 
-    DEFINES["_DEBUG"] = True
-
-if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "WINNT":
-
-    DEFINES["_HAS_ITERATOR_DEBUGGING"] = "0"
-
-if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
+if CONFIG["CPU_ARCH"] == "ppc64":
 
     DEFINES["USE_X11"] = "1"
     DEFINES["WEBRTC_USE_X11"] = True
@@ -281,10 +278,182 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
         "/third_party/libwebrtc/modules/desktop_capture/linux/x_window_property.cc"
     ]
 
+if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Darwin":
+
+    DEFINES["_DEBUG"] = True
+
+if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_DEBUG"] = True
+
+if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "OpenBSD":
+
+    DEFINES["_DEBUG"] = True
+
+if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "WINNT":
+
+    DEFINES["_HAS_ITERATOR_DEBUGGING"] = "0"
+
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["WEBRTC_USE_PIPEWIRE"] = True
+    DEFINES["_GNU_SOURCE"] = True
+
+    SOURCES += [
+        "/third_party/libwebrtc/modules/desktop_capture/linux/base_capturer_pipewire.cc"
+    ]
+
+    UNIFIED_SOURCES += [
+        "/third_party/libwebrtc/modules/desktop_capture/linux/screen_capturer_pipewire.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/window_capturer_pipewire.cc"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["WEBRTC_USE_PIPEWIRE"] = True
+    DEFINES["_GNU_SOURCE"] = True
+
+    SOURCES += [
+        "/third_party/libwebrtc/modules/desktop_capture/linux/base_capturer_pipewire.cc"
+    ]
+
+    UNIFIED_SOURCES += [
+        "/third_party/libwebrtc/modules/desktop_capture/linux/screen_capturer_pipewire.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/window_capturer_pipewire.cc"
+    ]
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["WEBRTC_USE_PIPEWIRE"] = True
+    DEFINES["_GNU_SOURCE"] = True
+
+    SOURCES += [
+        "/third_party/libwebrtc/modules/desktop_capture/linux/base_capturer_pipewire.cc"
+    ]
+
+    UNIFIED_SOURCES += [
+        "/third_party/libwebrtc/modules/desktop_capture/linux/screen_capturer_pipewire.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/window_capturer_pipewire.cc"
+    ]
+
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["USE_X11"] = "1"
+    DEFINES["WEBRTC_USE_X11"] = True
+
+    OS_LIBS += [
+        "X11",
+        "Xcomposite",
+        "Xdamage",
+        "Xext",
+        "Xfixes",
+        "Xrandr",
+        "Xrender",
+        "Xtst"
+    ]
+
+    UNIFIED_SOURCES += [
+        "/third_party/libwebrtc/modules/desktop_capture/linux/mouse_cursor_monitor_x11.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/screen_capturer_x11.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/shared_x_display.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/window_capturer_x11.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/window_finder_x11.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/window_list_utils.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/x_atom_cache.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/x_error_trap.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/x_server_pixel_buffer.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/x_window_property.cc"
+    ]
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["USE_X11"] = "1"
+    DEFINES["WEBRTC_USE_X11"] = True
+
+    OS_LIBS += [
+        "X11",
+        "Xcomposite",
+        "Xdamage",
+        "Xext",
+        "Xfixes",
+        "Xrandr",
+        "Xrender",
+        "Xtst"
+    ]
+
+    UNIFIED_SOURCES += [
+        "/third_party/libwebrtc/modules/desktop_capture/linux/mouse_cursor_monitor_x11.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/screen_capturer_x11.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/shared_x_display.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/window_capturer_x11.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/window_finder_x11.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/window_list_utils.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/x_atom_cache.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/x_error_trap.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/x_server_pixel_buffer.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/x_window_property.cc"
+    ]
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["USE_X11"] = "1"
+    DEFINES["WEBRTC_USE_X11"] = True
+
+    OS_LIBS += [
+        "X11",
+        "Xcomposite",
+        "Xdamage",
+        "Xext",
+        "Xfixes",
+        "Xrandr",
+        "Xrender",
+        "Xtst"
+    ]
+
+    UNIFIED_SOURCES += [
+        "/third_party/libwebrtc/modules/desktop_capture/linux/mouse_cursor_monitor_x11.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/screen_capturer_x11.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/shared_x_display.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/window_capturer_x11.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/window_finder_x11.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/window_list_utils.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/x_atom_cache.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/x_error_trap.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/x_server_pixel_buffer.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/x_window_property.cc"
+    ]
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["USE_X11"] = "1"
+    DEFINES["WEBRTC_USE_X11"] = True
+
+    OS_LIBS += [
+        "X11",
+        "Xcomposite",
+        "Xdamage",
+        "Xext",
+        "Xfixes",
+        "Xrandr",
+        "Xrender",
+        "Xtst"
+    ]
+
+    UNIFIED_SOURCES += [
+        "/third_party/libwebrtc/modules/desktop_capture/linux/mouse_cursor_monitor_x11.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/screen_capturer_x11.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/shared_x_display.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/window_capturer_x11.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/window_finder_x11.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/window_list_utils.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/x_atom_cache.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/x_error_trap.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/x_server_pixel_buffer.cc",
+        "/third_party/libwebrtc/modules/desktop_capture/linux/x_window_property.cc"
+    ]
+
 Library("desktop_capture_generic_gn")
diff --git a/third_party/libwebrtc/modules/desktop_capture/desktop_capture_gn/moz.build b/third_party/libwebrtc/modules/desktop_capture/desktop_capture_gn/moz.build
index 77af4824a742..e281ba8daf2a 100644
--- a/third_party/libwebrtc/modules/desktop_capture/desktop_capture_gn/moz.build
+++ b/third_party/libwebrtc/modules/desktop_capture/desktop_capture_gn/moz.build
@@ -56,7 +56,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -131,6 +130,29 @@ if CONFIG["CPU_ARCH"] == "aarch64":
     DEFINES["WEBRTC_ARCH_ARM64"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
+if CONFIG["CPU_ARCH"] == "arm":
+
+    DEFINES["WEBRTC_ARCH_ARM"] = True
+    DEFINES["WEBRTC_ARCH_ARM_V7"] = True
+    DEFINES["WEBRTC_HAS_NEON"] = True
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "ppc64":
+
+    DEFINES["USE_X11"] = "1"
+    DEFINES["WEBRTC_USE_X11"] = True
+
+    OS_LIBS += [
+        "X11",
+        "Xcomposite",
+        "Xdamage",
+        "Xext",
+        "Xfixes",
+        "Xrandr",
+        "Xrender",
+        "Xtst"
+    ]
+
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Darwin":
 
     DEFINES["_DEBUG"] = True
@@ -147,7 +169,67 @@ if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "WINNT":
 
     DEFINES["_HAS_ITERATOR_DEBUGGING"] = "0"
 
-if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["USE_X11"] = "1"
+    DEFINES["WEBRTC_USE_X11"] = True
+
+    OS_LIBS += [
+        "X11",
+        "Xcomposite",
+        "Xdamage",
+        "Xext",
+        "Xfixes",
+        "Xrandr",
+        "Xrender",
+        "Xtst"
+    ]
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["USE_X11"] = "1"
+    DEFINES["WEBRTC_USE_X11"] = True
+
+    OS_LIBS += [
+        "X11",
+        "Xcomposite",
+        "Xdamage",
+        "Xext",
+        "Xfixes",
+        "Xrandr",
+        "Xrender",
+        "Xtst"
+    ]
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["USE_X11"] = "1"
+    DEFINES["WEBRTC_USE_X11"] = True
+
+    OS_LIBS += [
+        "X11",
+        "Xcomposite",
+        "Xdamage",
+        "Xext",
+        "Xfixes",
+        "Xrandr",
+        "Xrender",
+        "Xtst"
+    ]
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
     DEFINES["WEBRTC_USE_X11"] = True
diff --git a/third_party/libwebrtc/modules/desktop_capture/primitives_gn/moz.build b/third_party/libwebrtc/modules/desktop_capture/primitives_gn/moz.build
index 601ef5ff72ca..27fd94b5b85c 100644
--- a/third_party/libwebrtc/modules/desktop_capture/primitives_gn/moz.build
+++ b/third_party/libwebrtc/modules/desktop_capture/primitives_gn/moz.build
@@ -64,7 +64,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -113,6 +112,21 @@ if CONFIG["CPU_ARCH"] == "aarch64":
     DEFINES["WEBRTC_ARCH_ARM64"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
+if CONFIG["CPU_ARCH"] == "arm":
+
+    CXXFLAGS += [
+        "-mfpu=neon"
+    ]
+
+    DEFINES["WEBRTC_ARCH_ARM"] = True
+    DEFINES["WEBRTC_ARCH_ARM_V7"] = True
+    DEFINES["WEBRTC_HAS_NEON"] = True
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "ppc64":
+
+    DEFINES["USE_X11"] = "1"
+
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Darwin":
 
     DEFINES["_DEBUG"] = True
@@ -129,9 +143,9 @@ if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "WINNT":
 
     DEFINES["_HAS_ITERATOR_DEBUGGING"] = "0"
 
-if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
 
-    DEFINES["USE_X11"] = "1"
+    DEFINES["_GNU_SOURCE"] = True
 
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
@@ -139,4 +153,26 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["USE_X11"] = "1"
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["USE_X11"] = "1"
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["USE_X11"] = "1"
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["USE_X11"] = "1"
+
 Library("primitives_gn")
diff --git a/third_party/libwebrtc/modules/module_api_gn/moz.build b/third_party/libwebrtc/modules/module_api_gn/moz.build
index 60cb0ad73c84..6ec677faa02d 100644
--- a/third_party/libwebrtc/modules/module_api_gn/moz.build
+++ b/third_party/libwebrtc/modules/module_api_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("module_api_gn")
diff --git a/third_party/libwebrtc/modules/module_api_public_gn/moz.build b/third_party/libwebrtc/modules/module_api_public_gn/moz.build
index 7bef70e8f421..5eb4229dd18c 100644
--- a/third_party/libwebrtc/modules/module_api_public_gn/moz.build
+++ b/third_party/libwebrtc/modules/module_api_public_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("module_api_public_gn")
diff --git a/third_party/libwebrtc/modules/module_fec_api_gn/moz.build b/third_party/libwebrtc/modules/module_fec_api_gn/moz.build
index 74d5aa72d3a2..0a1dad5b877b 100644
--- a/third_party/libwebrtc/modules/module_fec_api_gn/moz.build
+++ b/third_party/libwebrtc/modules/module_fec_api_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("module_fec_api_gn")
diff --git a/third_party/libwebrtc/modules/pacing/interval_budget_gn/moz.build b/third_party/libwebrtc/modules/pacing/interval_budget_gn/moz.build
index 262345a29bd8..b38038c227df 100644
--- a/third_party/libwebrtc/modules/pacing/interval_budget_gn/moz.build
+++ b/third_party/libwebrtc/modules/pacing/interval_budget_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("interval_budget_gn")
diff --git a/third_party/libwebrtc/modules/pacing/pacing_gn/moz.build b/third_party/libwebrtc/modules/pacing/pacing_gn/moz.build
index c5abf90241b1..77f554bcaa93 100644
--- a/third_party/libwebrtc/modules/pacing/pacing_gn/moz.build
+++ b/third_party/libwebrtc/modules/pacing/pacing_gn/moz.build
@@ -83,7 +83,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -154,11 +153,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -183,6 +177,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -193,10 +194,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("pacing_gn")
diff --git a/third_party/libwebrtc/modules/remote_bitrate_estimator/remote_bitrate_estimator_gn/moz.build b/third_party/libwebrtc/modules/remote_bitrate_estimator/remote_bitrate_estimator_gn/moz.build
index 80230e2f0118..7ad9daf4dc2c 100644
--- a/third_party/libwebrtc/modules/remote_bitrate_estimator/remote_bitrate_estimator_gn/moz.build
+++ b/third_party/libwebrtc/modules/remote_bitrate_estimator/remote_bitrate_estimator_gn/moz.build
@@ -89,7 +89,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -160,11 +159,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -189,6 +183,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -199,10 +200,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("remote_bitrate_estimator_gn")
diff --git a/third_party/libwebrtc/modules/rtp_rtcp/rtp_rtcp_format_gn/moz.build b/third_party/libwebrtc/modules/rtp_rtcp/rtp_rtcp_format_gn/moz.build
index 339fa1c95ff1..59dfc51872bf 100644
--- a/third_party/libwebrtc/modules/rtp_rtcp/rtp_rtcp_format_gn/moz.build
+++ b/third_party/libwebrtc/modules/rtp_rtcp/rtp_rtcp_format_gn/moz.build
@@ -119,7 +119,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -190,11 +189,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -219,6 +213,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -229,10 +230,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rtp_rtcp_format_gn")
diff --git a/third_party/libwebrtc/modules/rtp_rtcp/rtp_rtcp_gn/moz.build b/third_party/libwebrtc/modules/rtp_rtcp/rtp_rtcp_gn/moz.build
index a964d3ddee98..0448d75c65be 100644
--- a/third_party/libwebrtc/modules/rtp_rtcp/rtp_rtcp_gn/moz.build
+++ b/third_party/libwebrtc/modules/rtp_rtcp/rtp_rtcp_gn/moz.build
@@ -131,7 +131,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -202,11 +201,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -231,6 +225,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -241,10 +242,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rtp_rtcp_gn")
diff --git a/third_party/libwebrtc/modules/rtp_rtcp/rtp_video_header_gn/moz.build b/third_party/libwebrtc/modules/rtp_rtcp/rtp_video_header_gn/moz.build
index b6f31cb6ccc6..99b466e4f96f 100644
--- a/third_party/libwebrtc/modules/rtp_rtcp/rtp_video_header_gn/moz.build
+++ b/third_party/libwebrtc/modules/rtp_rtcp/rtp_video_header_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rtp_video_header_gn")
diff --git a/third_party/libwebrtc/modules/third_party/fft/fft_gn/moz.build b/third_party/libwebrtc/modules/third_party/fft/fft_gn/moz.build
index 09055c15e733..bd5ba8d068b6 100644
--- a/third_party/libwebrtc/modules/third_party/fft/fft_gn/moz.build
+++ b/third_party/libwebrtc/modules/third_party/fft/fft_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -132,11 +131,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -161,6 +155,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CFLAGS += [
@@ -171,10 +172,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("fft_gn")
diff --git a/third_party/libwebrtc/modules/third_party/g711/g711_3p_gn/moz.build b/third_party/libwebrtc/modules/third_party/g711/g711_3p_gn/moz.build
index 7b8447b62334..3090f6672642 100644
--- a/third_party/libwebrtc/modules/third_party/g711/g711_3p_gn/moz.build
+++ b/third_party/libwebrtc/modules/third_party/g711/g711_3p_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -132,11 +131,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -161,6 +155,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CFLAGS += [
@@ -171,10 +172,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("g711_3p_gn")
diff --git a/third_party/libwebrtc/modules/third_party/g722/g722_3p_gn/moz.build b/third_party/libwebrtc/modules/third_party/g722/g722_3p_gn/moz.build
index bf3a33c773b5..786091938c38 100644
--- a/third_party/libwebrtc/modules/third_party/g722/g722_3p_gn/moz.build
+++ b/third_party/libwebrtc/modules/third_party/g722/g722_3p_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -136,11 +135,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -165,6 +159,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CFLAGS += [
@@ -175,10 +176,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("g722_3p_gn")
diff --git a/third_party/libwebrtc/modules/utility/utility_gn/moz.build b/third_party/libwebrtc/modules/utility/utility_gn/moz.build
index 78c017360b45..575c3b3ac226 100644
--- a/third_party/libwebrtc/modules/utility/utility_gn/moz.build
+++ b/third_party/libwebrtc/modules/utility/utility_gn/moz.build
@@ -82,7 +82,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -152,11 +151,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -181,6 +175,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -191,10 +192,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("utility_gn")
diff --git a/third_party/libwebrtc/modules/video_capture/video_capture_internal_impl_gn/moz.build b/third_party/libwebrtc/modules/video_capture/video_capture_internal_impl_gn/moz.build
index be1c683e1302..645c2d7c0273 100644
--- a/third_party/libwebrtc/modules/video_capture/video_capture_internal_impl_gn/moz.build
+++ b/third_party/libwebrtc/modules/video_capture/video_capture_internal_impl_gn/moz.build
@@ -74,7 +74,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -166,11 +165,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -195,16 +189,41 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    CXXFLAGS += [
+        "-mfpu=neon"
+    ]
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("video_capture_internal_impl_gn")
diff --git a/third_party/libwebrtc/modules/video_capture/video_capture_module_gn/moz.build b/third_party/libwebrtc/modules/video_capture/video_capture_module_gn/moz.build
index c722c9a1addf..1322791ebee7 100644
--- a/third_party/libwebrtc/modules/video_capture/video_capture_module_gn/moz.build
+++ b/third_party/libwebrtc/modules/video_capture/video_capture_module_gn/moz.build
@@ -82,7 +82,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -153,11 +152,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -182,6 +176,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -192,10 +193,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("video_capture_module_gn")
diff --git a/third_party/libwebrtc/modules/video_coding/chain_diff_calculator_gn/moz.build b/third_party/libwebrtc/modules/video_coding/chain_diff_calculator_gn/moz.build
index 752427600cc8..2f3f10ecfec9 100644
--- a/third_party/libwebrtc/modules/video_coding/chain_diff_calculator_gn/moz.build
+++ b/third_party/libwebrtc/modules/video_coding/chain_diff_calculator_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("chain_diff_calculator_gn")
diff --git a/third_party/libwebrtc/modules/video_coding/codec_globals_headers_gn/moz.build b/third_party/libwebrtc/modules/video_coding/codec_globals_headers_gn/moz.build
index 4c609bcf5987..a509d7ca5d3a 100644
--- a/third_party/libwebrtc/modules/video_coding/codec_globals_headers_gn/moz.build
+++ b/third_party/libwebrtc/modules/video_coding/codec_globals_headers_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -128,11 +127,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -157,10 +151,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("codec_globals_headers_gn")
diff --git a/third_party/libwebrtc/modules/video_coding/codecs/av1/libaom_av1_decoder_gn/moz.build b/third_party/libwebrtc/modules/video_coding/codecs/av1/libaom_av1_decoder_gn/moz.build
index 10ebc739ec0c..7c6bba5360ea 100644
--- a/third_party/libwebrtc/modules/video_coding/codecs/av1/libaom_av1_decoder_gn/moz.build
+++ b/third_party/libwebrtc/modules/video_coding/codecs/av1/libaom_av1_decoder_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("aom_av1_decoder_gn")
diff --git a/third_party/libwebrtc/modules/video_coding/codecs/av1/libaom_av1_encoder_gn/moz.build b/third_party/libwebrtc/modules/video_coding/codecs/av1/libaom_av1_encoder_gn/moz.build
index 784c29ac2eb4..ebba8c336f4b 100644
--- a/third_party/libwebrtc/modules/video_coding/codecs/av1/libaom_av1_encoder_gn/moz.build
+++ b/third_party/libwebrtc/modules/video_coding/codecs/av1/libaom_av1_encoder_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("aom_av1_encoder_gn")
diff --git a/third_party/libwebrtc/modules/video_coding/deprecated/nack_module_gn/moz.build b/third_party/libwebrtc/modules/video_coding/deprecated/nack_module_gn/moz.build
index 16c1e39afd32..8ffb99dc9f9b 100644
--- a/third_party/libwebrtc/modules/video_coding/deprecated/nack_module_gn/moz.build
+++ b/third_party/libwebrtc/modules/video_coding/deprecated/nack_module_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -147,11 +146,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -176,6 +170,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -186,10 +187,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("nack_module_gn")
diff --git a/third_party/libwebrtc/modules/video_coding/encoded_frame_gn/moz.build b/third_party/libwebrtc/modules/video_coding/encoded_frame_gn/moz.build
index 2b90cece77c2..ec4c04daed07 100644
--- a/third_party/libwebrtc/modules/video_coding/encoded_frame_gn/moz.build
+++ b/third_party/libwebrtc/modules/video_coding/encoded_frame_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -149,11 +148,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -178,6 +172,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -188,10 +189,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("encoded_frame_gn")
diff --git a/third_party/libwebrtc/modules/video_coding/frame_dependencies_calculator_gn/moz.build b/third_party/libwebrtc/modules/video_coding/frame_dependencies_calculator_gn/moz.build
index cdbe6e8ff64c..85bfa4e12eed 100644
--- a/third_party/libwebrtc/modules/video_coding/frame_dependencies_calculator_gn/moz.build
+++ b/third_party/libwebrtc/modules/video_coding/frame_dependencies_calculator_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("frame_dependencies_calculator_gn")
diff --git a/third_party/libwebrtc/modules/video_coding/nack_module_gn/moz.build b/third_party/libwebrtc/modules/video_coding/nack_module_gn/moz.build
index aa97afcceee0..9aaf3524fe58 100644
--- a/third_party/libwebrtc/modules/video_coding/nack_module_gn/moz.build
+++ b/third_party/libwebrtc/modules/video_coding/nack_module_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -148,11 +147,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -177,6 +171,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -187,10 +188,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("nack_module_gn")
diff --git a/third_party/libwebrtc/modules/video_coding/video_codec_interface_gn/moz.build b/third_party/libwebrtc/modules/video_coding/video_codec_interface_gn/moz.build
index 9376b1f0cf5e..20e0b2301bc9 100644
--- a/third_party/libwebrtc/modules/video_coding/video_codec_interface_gn/moz.build
+++ b/third_party/libwebrtc/modules/video_coding/video_codec_interface_gn/moz.build
@@ -79,7 +79,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -150,11 +149,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -179,6 +173,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -189,10 +190,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("video_codec_interface_gn")
diff --git a/third_party/libwebrtc/modules/video_coding/video_coding_gn/moz.build b/third_party/libwebrtc/modules/video_coding/video_coding_gn/moz.build
index 6df10be0664d..5d1d6b149efe 100644
--- a/third_party/libwebrtc/modules/video_coding/video_coding_gn/moz.build
+++ b/third_party/libwebrtc/modules/video_coding/video_coding_gn/moz.build
@@ -98,7 +98,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -169,11 +168,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -198,6 +192,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -208,10 +209,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("video_coding_gn")
diff --git a/third_party/libwebrtc/modules/video_coding/video_coding_utility_gn/moz.build b/third_party/libwebrtc/modules/video_coding/video_coding_utility_gn/moz.build
index 5c408d3e0083..aef956f70da7 100644
--- a/third_party/libwebrtc/modules/video_coding/video_coding_utility_gn/moz.build
+++ b/third_party/libwebrtc/modules/video_coding/video_coding_utility_gn/moz.build
@@ -87,7 +87,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -158,11 +157,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -187,6 +181,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -197,10 +198,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("video_coding_utility_gn")
diff --git a/third_party/libwebrtc/modules/video_coding/webrtc_h264_gn/moz.build b/third_party/libwebrtc/modules/video_coding/webrtc_h264_gn/moz.build
index b1190c405c1e..3eab3acb7156 100644
--- a/third_party/libwebrtc/modules/video_coding/webrtc_h264_gn/moz.build
+++ b/third_party/libwebrtc/modules/video_coding/webrtc_h264_gn/moz.build
@@ -83,7 +83,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -154,11 +153,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -183,6 +177,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -193,10 +194,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("webrtc_h264_gn")
diff --git a/third_party/libwebrtc/modules/video_coding/webrtc_multiplex_gn/moz.build b/third_party/libwebrtc/modules/video_coding/webrtc_multiplex_gn/moz.build
index cc6ce9457f46..087fbfe8054e 100644
--- a/third_party/libwebrtc/modules/video_coding/webrtc_multiplex_gn/moz.build
+++ b/third_party/libwebrtc/modules/video_coding/webrtc_multiplex_gn/moz.build
@@ -81,7 +81,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -152,11 +151,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -181,6 +175,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -191,10 +192,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("webrtc_multiplex_gn")
diff --git a/third_party/libwebrtc/modules/video_coding/webrtc_vp8_gn/moz.build b/third_party/libwebrtc/modules/video_coding/webrtc_vp8_gn/moz.build
index 1ba6d9081da6..66a15bc24254 100644
--- a/third_party/libwebrtc/modules/video_coding/webrtc_vp8_gn/moz.build
+++ b/third_party/libwebrtc/modules/video_coding/webrtc_vp8_gn/moz.build
@@ -82,7 +82,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -153,11 +152,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -182,6 +176,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -192,10 +193,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("webrtc_vp8_gn")
diff --git a/third_party/libwebrtc/modules/video_coding/webrtc_vp8_temporal_layers_gn/moz.build b/third_party/libwebrtc/modules/video_coding/webrtc_vp8_temporal_layers_gn/moz.build
index fd36f83b4a6d..e0af1f81e72b 100644
--- a/third_party/libwebrtc/modules/video_coding/webrtc_vp8_temporal_layers_gn/moz.build
+++ b/third_party/libwebrtc/modules/video_coding/webrtc_vp8_temporal_layers_gn/moz.build
@@ -83,7 +83,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -154,11 +153,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -183,6 +177,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -193,10 +194,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("webrtc_vp8_temporal_layers_gn")
diff --git a/third_party/libwebrtc/modules/video_coding/webrtc_vp9_gn/moz.build b/third_party/libwebrtc/modules/video_coding/webrtc_vp9_gn/moz.build
index 686b6c1973d9..9aa5e0557fbe 100644
--- a/third_party/libwebrtc/modules/video_coding/webrtc_vp9_gn/moz.build
+++ b/third_party/libwebrtc/modules/video_coding/webrtc_vp9_gn/moz.build
@@ -80,7 +80,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -151,11 +150,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -180,6 +174,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -190,10 +191,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("webrtc_vp9_gn")
diff --git a/third_party/libwebrtc/modules/video_coding/webrtc_vp9_helpers_gn/moz.build b/third_party/libwebrtc/modules/video_coding/webrtc_vp9_helpers_gn/moz.build
index 1f2575bff58a..7f52a73077f0 100644
--- a/third_party/libwebrtc/modules/video_coding/webrtc_vp9_helpers_gn/moz.build
+++ b/third_party/libwebrtc/modules/video_coding/webrtc_vp9_helpers_gn/moz.build
@@ -79,7 +79,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -150,11 +149,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -179,6 +173,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -189,10 +190,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("webrtc_vp9_helpers_gn")
diff --git a/third_party/libwebrtc/modules/video_processing/denoiser_filter_gn/moz.build b/third_party/libwebrtc/modules/video_processing/denoiser_filter_gn/moz.build
index 0b49b35e4c56..bd1b5a54b70a 100644
--- a/third_party/libwebrtc/modules/video_processing/denoiser_filter_gn/moz.build
+++ b/third_party/libwebrtc/modules/video_processing/denoiser_filter_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("denoiser_filter_gn")
diff --git a/third_party/libwebrtc/modules/video_processing/video_processing_gn/moz.build b/third_party/libwebrtc/modules/video_processing/video_processing_gn/moz.build
index e5ad2edf1d68..439ca091a399 100644
--- a/third_party/libwebrtc/modules/video_processing/video_processing_gn/moz.build
+++ b/third_party/libwebrtc/modules/video_processing/video_processing_gn/moz.build
@@ -84,7 +84,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -155,11 +154,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -184,6 +178,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -194,10 +195,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("video_processing_gn")
diff --git a/third_party/libwebrtc/modules/video_processing/video_processing_neon_gn/moz.build b/third_party/libwebrtc/modules/video_processing/video_processing_neon_gn/moz.build
index a0294fb2b699..5224e3c4aa6b 100644
--- a/third_party/libwebrtc/modules/video_processing/video_processing_neon_gn/moz.build
+++ b/third_party/libwebrtc/modules/video_processing/video_processing_neon_gn/moz.build
@@ -72,7 +72,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["USE_NSS_CERTS"] = "1"
     DEFINES["USE_OZONE"] = "1"
     DEFINES["USE_UDEV"] = True
-    DEFINES["WEBRTC_ARCH_ARM64"] = True
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
@@ -118,11 +117,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM"] = True
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -147,4 +141,15 @@ if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["WEBRTC_ARCH_ARM64"] = True
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["WEBRTC_ARCH_ARM64"] = True
+
 Library("video_processing_neon_gn")
diff --git a/third_party/libwebrtc/moz.build b/third_party/libwebrtc/moz.build
index 11313553ede4..0860a1906fbb 100644
--- a/third_party/libwebrtc/moz.build
+++ b/third_party/libwebrtc/moz.build
@@ -384,18 +384,6 @@ if CONFIG["OS_TARGET"] == "Darwin":
         "/third_party/libwebrtc/sdk/helpers_objc_gn"
     ]
 
-if CONFIG["OS_TARGET"] == "Linux":
-
-    DIRS += [
-        "/third_party/libwebrtc/api/audio_codecs/isac/audio_decoder_isac_float_gn",
-        "/third_party/libwebrtc/api/audio_codecs/isac/audio_encoder_isac_float_gn",
-        "/third_party/libwebrtc/modules/audio_coding/isac_c_gn",
-        "/third_party/libwebrtc/modules/audio_coding/isac_gn",
-        "/third_party/libwebrtc/modules/desktop_capture/desktop_capture_generic_gn",
-        "/third_party/libwebrtc/modules/desktop_capture/desktop_capture_gn",
-        "/third_party/libwebrtc/modules/desktop_capture/primitives_gn"
-    ]
-
 if CONFIG["OS_TARGET"] == "OpenBSD":
 
     DIRS += [
@@ -500,28 +488,77 @@ if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Darwin":
 if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
 
     DIRS += [
+        "/third_party/libwebrtc/api/audio_codecs/isac/audio_decoder_isac_float_gn",
+        "/third_party/libwebrtc/api/audio_codecs/isac/audio_encoder_isac_float_gn",
         "/third_party/libwebrtc/common_audio/common_audio_neon_c_gn",
         "/third_party/libwebrtc/common_audio/common_audio_neon_gn",
+        "/third_party/libwebrtc/modules/audio_coding/isac_c_gn",
+        "/third_party/libwebrtc/modules/audio_coding/isac_gn",
+        "/third_party/libwebrtc/modules/desktop_capture/desktop_capture_generic_gn",
+        "/third_party/libwebrtc/modules/desktop_capture/desktop_capture_gn",
+        "/third_party/libwebrtc/modules/desktop_capture/primitives_gn",
         "/third_party/libwebrtc/modules/video_processing/video_processing_neon_gn"
     ]
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DIRS += [
+        "/third_party/libwebrtc/api/audio_codecs/isac/audio_decoder_isac_fix_gn",
+        "/third_party/libwebrtc/api/audio_codecs/isac/audio_encoder_isac_fix_gn",
+        "/third_party/libwebrtc/common_audio/common_audio_neon_c_gn",
+        "/third_party/libwebrtc/common_audio/common_audio_neon_gn",
+        "/third_party/libwebrtc/modules/audio_coding/isac_fix_c_arm_asm_gn",
+        "/third_party/libwebrtc/modules/audio_coding/isac_fix_c_gn",
+        "/third_party/libwebrtc/modules/audio_coding/isac_fix_common_gn",
+        "/third_party/libwebrtc/modules/audio_coding/isac_fix_gn",
+        "/third_party/libwebrtc/modules/audio_coding/isac_neon_gn",
+        "/third_party/libwebrtc/modules/desktop_capture/desktop_capture_generic_gn",
+        "/third_party/libwebrtc/modules/desktop_capture/desktop_capture_gn",
+        "/third_party/libwebrtc/modules/desktop_capture/primitives_gn",
+        "/third_party/libwebrtc/modules/video_processing/video_processing_neon_gn",
+        "/third_party/libwebrtc/rtc_base/system/asm_defines_gn"
+    ]
+
+if CONFIG["CPU_ARCH"] == "ppc64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DIRS += [
+        "/third_party/libwebrtc/api/audio_codecs/isac/audio_decoder_isac_float_gn",
+        "/third_party/libwebrtc/api/audio_codecs/isac/audio_encoder_isac_float_gn",
+        "/third_party/libwebrtc/modules/audio_coding/isac_c_gn",
+        "/third_party/libwebrtc/modules/audio_coding/isac_gn"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     DIRS += [
+        "/third_party/libwebrtc/api/audio_codecs/isac/audio_decoder_isac_float_gn",
+        "/third_party/libwebrtc/api/audio_codecs/isac/audio_encoder_isac_float_gn",
         "/third_party/libwebrtc/common_audio/common_audio_avx2_gn",
         "/third_party/libwebrtc/common_audio/common_audio_sse2_gn",
+        "/third_party/libwebrtc/modules/audio_coding/isac_c_gn",
+        "/third_party/libwebrtc/modules/audio_coding/isac_gn",
         "/third_party/libwebrtc/modules/audio_processing/aec3/aec3_avx2_gn",
         "/third_party/libwebrtc/modules/desktop_capture/desktop_capture_differ_sse2_gn",
+        "/third_party/libwebrtc/modules/desktop_capture/desktop_capture_generic_gn",
+        "/third_party/libwebrtc/modules/desktop_capture/desktop_capture_gn",
+        "/third_party/libwebrtc/modules/desktop_capture/primitives_gn",
         "/third_party/libwebrtc/modules/video_processing/video_processing_sse2_gn"
     ]
 
 if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
 
     DIRS += [
+        "/third_party/libwebrtc/api/audio_codecs/isac/audio_decoder_isac_float_gn",
+        "/third_party/libwebrtc/api/audio_codecs/isac/audio_encoder_isac_float_gn",
         "/third_party/libwebrtc/common_audio/common_audio_avx2_gn",
         "/third_party/libwebrtc/common_audio/common_audio_sse2_gn",
+        "/third_party/libwebrtc/modules/audio_coding/isac_c_gn",
+        "/third_party/libwebrtc/modules/audio_coding/isac_gn",
         "/third_party/libwebrtc/modules/audio_processing/aec3/aec3_avx2_gn",
         "/third_party/libwebrtc/modules/desktop_capture/desktop_capture_differ_sse2_gn",
+        "/third_party/libwebrtc/modules/desktop_capture/desktop_capture_generic_gn",
+        "/third_party/libwebrtc/modules/desktop_capture/desktop_capture_gn",
+        "/third_party/libwebrtc/modules/desktop_capture/primitives_gn",
         "/third_party/libwebrtc/modules/video_processing/video_processing_sse2_gn"
     ]
 
diff --git a/third_party/libwebrtc/rtc_base/atomicops_gn/moz.build b/third_party/libwebrtc/rtc_base/atomicops_gn/moz.build
index 4d1ec84c7569..963c9d8d4e47 100644
--- a/third_party/libwebrtc/rtc_base/atomicops_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/atomicops_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("atomicops_gn")
diff --git a/third_party/libwebrtc/rtc_base/audio_format_to_string_gn/moz.build b/third_party/libwebrtc/rtc_base/audio_format_to_string_gn/moz.build
index 1a9765e38653..741fb67c65ed 100644
--- a/third_party/libwebrtc/rtc_base/audio_format_to_string_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/audio_format_to_string_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("audio_format_to_string_gn")
diff --git a/third_party/libwebrtc/rtc_base/checks_gn/moz.build b/third_party/libwebrtc/rtc_base/checks_gn/moz.build
index 723a0237e390..985ffb8c0c5b 100644
--- a/third_party/libwebrtc/rtc_base/checks_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/checks_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -136,11 +135,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -165,6 +159,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -175,10 +176,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("checks_gn")
diff --git a/third_party/libwebrtc/rtc_base/compile_assert_c_gn/moz.build b/third_party/libwebrtc/rtc_base/compile_assert_c_gn/moz.build
index 56066830a871..95c3d974b436 100644
--- a/third_party/libwebrtc/rtc_base/compile_assert_c_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/compile_assert_c_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("compile_assert_c_gn")
diff --git a/third_party/libwebrtc/rtc_base/criticalsection_gn/moz.build b/third_party/libwebrtc/rtc_base/criticalsection_gn/moz.build
index f94f9fb1539d..7a36bfe59368 100644
--- a/third_party/libwebrtc/rtc_base/criticalsection_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/criticalsection_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -136,11 +135,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -165,6 +159,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -175,10 +176,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("criticalsection_gn")
diff --git a/third_party/libwebrtc/rtc_base/deprecation_gn/moz.build b/third_party/libwebrtc/rtc_base/deprecation_gn/moz.build
index 35ab1255738a..984702b66441 100644
--- a/third_party/libwebrtc/rtc_base/deprecation_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/deprecation_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("deprecation_gn")
diff --git a/third_party/libwebrtc/rtc_base/divide_round_gn/moz.build b/third_party/libwebrtc/rtc_base/divide_round_gn/moz.build
index e4c57819f3c9..799abf416696 100644
--- a/third_party/libwebrtc/rtc_base/divide_round_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/divide_round_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -128,11 +127,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -157,10 +151,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("divide_round_gn")
diff --git a/third_party/libwebrtc/rtc_base/experiments/alr_experiment_gn/moz.build b/third_party/libwebrtc/rtc_base/experiments/alr_experiment_gn/moz.build
index 214a827e0cfc..19fe6abc20ad 100644
--- a/third_party/libwebrtc/rtc_base/experiments/alr_experiment_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/experiments/alr_experiment_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("alr_experiment_gn")
diff --git a/third_party/libwebrtc/rtc_base/experiments/balanced_degradation_settings_gn/moz.build b/third_party/libwebrtc/rtc_base/experiments/balanced_degradation_settings_gn/moz.build
index a2f0626988c7..bbdb5131257c 100644
--- a/third_party/libwebrtc/rtc_base/experiments/balanced_degradation_settings_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/experiments/balanced_degradation_settings_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("balanced_degradation_settings_gn")
diff --git a/third_party/libwebrtc/rtc_base/experiments/cpu_speed_experiment_gn/moz.build b/third_party/libwebrtc/rtc_base/experiments/cpu_speed_experiment_gn/moz.build
index 77348177d482..0eed1ad60f0d 100644
--- a/third_party/libwebrtc/rtc_base/experiments/cpu_speed_experiment_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/experiments/cpu_speed_experiment_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("cpu_speed_experiment_gn")
diff --git a/third_party/libwebrtc/rtc_base/experiments/field_trial_parser_gn/moz.build b/third_party/libwebrtc/rtc_base/experiments/field_trial_parser_gn/moz.build
index 24d3779d30bc..796860694d34 100644
--- a/third_party/libwebrtc/rtc_base/experiments/field_trial_parser_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/experiments/field_trial_parser_gn/moz.build
@@ -80,7 +80,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -143,11 +142,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -172,6 +166,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -182,10 +183,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("field_trial_parser_gn")
diff --git a/third_party/libwebrtc/rtc_base/experiments/jitter_upper_bound_experiment_gn/moz.build b/third_party/libwebrtc/rtc_base/experiments/jitter_upper_bound_experiment_gn/moz.build
index f95dec6761ca..205bd45fa52e 100644
--- a/third_party/libwebrtc/rtc_base/experiments/jitter_upper_bound_experiment_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/experiments/jitter_upper_bound_experiment_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("jitter_upper_bound_experiment_gn")
diff --git a/third_party/libwebrtc/rtc_base/experiments/keyframe_interval_settings_experiment_gn/moz.build b/third_party/libwebrtc/rtc_base/experiments/keyframe_interval_settings_experiment_gn/moz.build
index 7e70ffcc1726..0c1a89402259 100644
--- a/third_party/libwebrtc/rtc_base/experiments/keyframe_interval_settings_experiment_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/experiments/keyframe_interval_settings_experiment_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("keyframe_interval_settings_experiment_gn")
diff --git a/third_party/libwebrtc/rtc_base/experiments/min_video_bitrate_experiment_gn/moz.build b/third_party/libwebrtc/rtc_base/experiments/min_video_bitrate_experiment_gn/moz.build
index 6ced10bae3cb..ad278ad750e3 100644
--- a/third_party/libwebrtc/rtc_base/experiments/min_video_bitrate_experiment_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/experiments/min_video_bitrate_experiment_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("min_video_bitrate_experiment_gn")
diff --git a/third_party/libwebrtc/rtc_base/experiments/quality_rampup_experiment_gn/moz.build b/third_party/libwebrtc/rtc_base/experiments/quality_rampup_experiment_gn/moz.build
index ca103a1f2249..9a719308c9e9 100644
--- a/third_party/libwebrtc/rtc_base/experiments/quality_rampup_experiment_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/experiments/quality_rampup_experiment_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("quality_rampup_experiment_gn")
diff --git a/third_party/libwebrtc/rtc_base/experiments/quality_scaler_settings_gn/moz.build b/third_party/libwebrtc/rtc_base/experiments/quality_scaler_settings_gn/moz.build
index e5b587f243c2..0d22af1cf0d5 100644
--- a/third_party/libwebrtc/rtc_base/experiments/quality_scaler_settings_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/experiments/quality_scaler_settings_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("quality_scaler_settings_gn")
diff --git a/third_party/libwebrtc/rtc_base/experiments/quality_scaling_experiment_gn/moz.build b/third_party/libwebrtc/rtc_base/experiments/quality_scaling_experiment_gn/moz.build
index a33c69046593..e1c03ed03184 100644
--- a/third_party/libwebrtc/rtc_base/experiments/quality_scaling_experiment_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/experiments/quality_scaling_experiment_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("quality_scaling_experiment_gn")
diff --git a/third_party/libwebrtc/rtc_base/experiments/rate_control_settings_gn/moz.build b/third_party/libwebrtc/rtc_base/experiments/rate_control_settings_gn/moz.build
index d23f2993452c..49f1182f5e38 100644
--- a/third_party/libwebrtc/rtc_base/experiments/rate_control_settings_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/experiments/rate_control_settings_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rate_control_settings_gn")
diff --git a/third_party/libwebrtc/rtc_base/experiments/rtt_mult_experiment_gn/moz.build b/third_party/libwebrtc/rtc_base/experiments/rtt_mult_experiment_gn/moz.build
index a7afce193d8e..8a15fa313c96 100644
--- a/third_party/libwebrtc/rtc_base/experiments/rtt_mult_experiment_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/experiments/rtt_mult_experiment_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rtt_mult_experiment_gn")
diff --git a/third_party/libwebrtc/rtc_base/experiments/stable_target_rate_experiment_gn/moz.build b/third_party/libwebrtc/rtc_base/experiments/stable_target_rate_experiment_gn/moz.build
index 0f744b1f1aca..ba3b13a5f401 100644
--- a/third_party/libwebrtc/rtc_base/experiments/stable_target_rate_experiment_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/experiments/stable_target_rate_experiment_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("stable_target_rate_experiment_gn")
diff --git a/third_party/libwebrtc/rtc_base/gtest_prod_gn/moz.build b/third_party/libwebrtc/rtc_base/gtest_prod_gn/moz.build
index 578556578b77..58ee1ed4807f 100644
--- a/third_party/libwebrtc/rtc_base/gtest_prod_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/gtest_prod_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("gtest_prod_gn")
diff --git a/third_party/libwebrtc/rtc_base/ignore_wundef_gn/moz.build b/third_party/libwebrtc/rtc_base/ignore_wundef_gn/moz.build
index 13b195e553ea..ed9683f8b8ea 100644
--- a/third_party/libwebrtc/rtc_base/ignore_wundef_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/ignore_wundef_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("ignore_wundef_gn")
diff --git a/third_party/libwebrtc/rtc_base/logging_gn/moz.build b/third_party/libwebrtc/rtc_base/logging_gn/moz.build
index 21c68779cee9..7a53cb844a09 100644
--- a/third_party/libwebrtc/rtc_base/logging_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/logging_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("logging_gn")
diff --git a/third_party/libwebrtc/rtc_base/macromagic_gn/moz.build b/third_party/libwebrtc/rtc_base/macromagic_gn/moz.build
index 44011bbf5a92..5f74a7fb3e88 100644
--- a/third_party/libwebrtc/rtc_base/macromagic_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/macromagic_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("macromagic_gn")
diff --git a/third_party/libwebrtc/rtc_base/memory/aligned_malloc_gn/moz.build b/third_party/libwebrtc/rtc_base/memory/aligned_malloc_gn/moz.build
index 1ef0c30aa65a..95d3a561c48d 100644
--- a/third_party/libwebrtc/rtc_base/memory/aligned_malloc_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/memory/aligned_malloc_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -136,11 +135,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -165,6 +159,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -175,10 +176,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("aligned_malloc_gn")
diff --git a/third_party/libwebrtc/rtc_base/network/sent_packet_gn/moz.build b/third_party/libwebrtc/rtc_base/network/sent_packet_gn/moz.build
index c33e0e25a0e5..48e810456b54 100644
--- a/third_party/libwebrtc/rtc_base/network/sent_packet_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/network/sent_packet_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -132,11 +131,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -161,6 +155,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -171,10 +172,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("sent_packet_gn")
diff --git a/third_party/libwebrtc/rtc_base/platform_thread_gn/moz.build b/third_party/libwebrtc/rtc_base/platform_thread_gn/moz.build
index ae4bfc2db28f..2505bbb202bf 100644
--- a/third_party/libwebrtc/rtc_base/platform_thread_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/platform_thread_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("platform_thread_gn")
diff --git a/third_party/libwebrtc/rtc_base/platform_thread_types_gn/moz.build b/third_party/libwebrtc/rtc_base/platform_thread_types_gn/moz.build
index 24bf5a92d410..ad03c153be01 100644
--- a/third_party/libwebrtc/rtc_base/platform_thread_types_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/platform_thread_types_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -132,11 +131,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -161,6 +155,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -171,10 +172,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("platform_thread_types_gn")
diff --git a/third_party/libwebrtc/rtc_base/protobuf_utils_gn/moz.build b/third_party/libwebrtc/rtc_base/protobuf_utils_gn/moz.build
index d543b9628e4d..220b4dc546a6 100644
--- a/third_party/libwebrtc/rtc_base/protobuf_utils_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/protobuf_utils_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("protobuf_utils_gn")
diff --git a/third_party/libwebrtc/rtc_base/rate_limiter_gn/moz.build b/third_party/libwebrtc/rtc_base/rate_limiter_gn/moz.build
index 15e3018405f9..5a4719b40967 100644
--- a/third_party/libwebrtc/rtc_base/rate_limiter_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/rate_limiter_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -147,11 +146,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -176,6 +170,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -186,10 +187,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rate_limiter_gn")
diff --git a/third_party/libwebrtc/rtc_base/refcount_gn/moz.build b/third_party/libwebrtc/rtc_base/refcount_gn/moz.build
index 8a508c4f1f40..58de50d22f5c 100644
--- a/third_party/libwebrtc/rtc_base/refcount_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/refcount_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("refcount_gn")
diff --git a/third_party/libwebrtc/rtc_base/rtc_base_approved_gn/moz.build b/third_party/libwebrtc/rtc_base/rtc_base_approved_gn/moz.build
index 41f78b20b28a..c44f0df60918 100644
--- a/third_party/libwebrtc/rtc_base/rtc_base_approved_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/rtc_base_approved_gn/moz.build
@@ -90,7 +90,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -157,11 +156,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -186,6 +180,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -196,10 +197,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rtc_base_approved_gn")
diff --git a/third_party/libwebrtc/rtc_base/rtc_base_gn/moz.build b/third_party/libwebrtc/rtc_base/rtc_base_gn/moz.build
index ffa789586099..d3d695101667 100644
--- a/third_party/libwebrtc/rtc_base/rtc_base_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/rtc_base_gn/moz.build
@@ -104,7 +104,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -190,11 +189,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -219,6 +213,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -229,10 +230,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rtc_base_gn")
diff --git a/third_party/libwebrtc/rtc_base/rtc_event_gn/moz.build b/third_party/libwebrtc/rtc_base/rtc_event_gn/moz.build
index a8bfe97efa8a..de2d81e60011 100644
--- a/third_party/libwebrtc/rtc_base/rtc_event_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/rtc_event_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -136,11 +135,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -165,6 +159,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -175,10 +176,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rtc_event_gn")
diff --git a/third_party/libwebrtc/rtc_base/rtc_numerics_gn/moz.build b/third_party/libwebrtc/rtc_base/rtc_numerics_gn/moz.build
index 09f5ff238229..ddb6df7919ab 100644
--- a/third_party/libwebrtc/rtc_base/rtc_numerics_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/rtc_numerics_gn/moz.build
@@ -79,7 +79,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -142,11 +141,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -171,6 +165,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -181,10 +182,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rtc_numerics_gn")
diff --git a/third_party/libwebrtc/rtc_base/rtc_task_queue_gn/moz.build b/third_party/libwebrtc/rtc_base/rtc_task_queue_gn/moz.build
index 8f7be39a35aa..7ddc659b10cc 100644
--- a/third_party/libwebrtc/rtc_base/rtc_task_queue_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/rtc_task_queue_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -136,11 +135,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -165,6 +159,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -175,10 +176,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rtc_task_queue_gn")
diff --git a/third_party/libwebrtc/rtc_base/safe_compare_gn/moz.build b/third_party/libwebrtc/rtc_base/safe_compare_gn/moz.build
index f1393f4a9e60..d9eff0756143 100644
--- a/third_party/libwebrtc/rtc_base/safe_compare_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/safe_compare_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("safe_compare_gn")
diff --git a/third_party/libwebrtc/rtc_base/safe_conversions_gn/moz.build b/third_party/libwebrtc/rtc_base/safe_conversions_gn/moz.build
index fed6b484e960..14051d1182b5 100644
--- a/third_party/libwebrtc/rtc_base/safe_conversions_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/safe_conversions_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -128,11 +127,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -157,10 +151,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("safe_conversions_gn")
diff --git a/third_party/libwebrtc/rtc_base/safe_minmax_gn/moz.build b/third_party/libwebrtc/rtc_base/safe_minmax_gn/moz.build
index 5dc01b430b71..e23ba45efdfa 100644
--- a/third_party/libwebrtc/rtc_base/safe_minmax_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/safe_minmax_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -128,11 +127,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -157,10 +151,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("safe_minmax_gn")
diff --git a/third_party/libwebrtc/rtc_base/sanitizer_gn/moz.build b/third_party/libwebrtc/rtc_base/sanitizer_gn/moz.build
index c4d02d4c8477..c79228b49449 100644
--- a/third_party/libwebrtc/rtc_base/sanitizer_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/sanitizer_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("sanitizer_gn")
diff --git a/third_party/libwebrtc/rtc_base/stringutils_gn/moz.build b/third_party/libwebrtc/rtc_base/stringutils_gn/moz.build
index 0f078edecc3b..d2438210af52 100644
--- a/third_party/libwebrtc/rtc_base/stringutils_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/stringutils_gn/moz.build
@@ -81,7 +81,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("stringutils_gn")
diff --git a/third_party/libwebrtc/rtc_base/synchronization/mutex_gn/moz.build b/third_party/libwebrtc/rtc_base/synchronization/mutex_gn/moz.build
index e8b1a19204e5..9916bbdc542a 100644
--- a/third_party/libwebrtc/rtc_base/synchronization/mutex_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/synchronization/mutex_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -136,11 +135,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -165,6 +159,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -175,10 +176,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("mutex_gn")
diff --git a/third_party/libwebrtc/rtc_base/synchronization/rw_lock_wrapper_gn/moz.build b/third_party/libwebrtc/rtc_base/synchronization/rw_lock_wrapper_gn/moz.build
index d265163cd464..10fcd89c276d 100644
--- a/third_party/libwebrtc/rtc_base/synchronization/rw_lock_wrapper_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/synchronization/rw_lock_wrapper_gn/moz.build
@@ -81,7 +81,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -156,11 +155,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -185,6 +179,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -195,10 +196,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rw_lock_wrapper_gn")
diff --git a/third_party/libwebrtc/rtc_base/synchronization/sequence_checker_gn/moz.build b/third_party/libwebrtc/rtc_base/synchronization/sequence_checker_gn/moz.build
index ec507a0add29..45b4ce477f94 100644
--- a/third_party/libwebrtc/rtc_base/synchronization/sequence_checker_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/synchronization/sequence_checker_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -136,11 +135,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -165,6 +159,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -175,10 +176,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("sequence_checker_gn")
diff --git a/third_party/libwebrtc/rtc_base/synchronization/yield_gn/moz.build b/third_party/libwebrtc/rtc_base/synchronization/yield_gn/moz.build
index fb5f30b9846c..5cc41102ca63 100644
--- a/third_party/libwebrtc/rtc_base/synchronization/yield_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/synchronization/yield_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -132,11 +131,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -161,6 +155,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -171,10 +172,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("yield_gn")
diff --git a/third_party/libwebrtc/rtc_base/synchronization/yield_policy_gn/moz.build b/third_party/libwebrtc/rtc_base/synchronization/yield_policy_gn/moz.build
index 58ab0be69f59..5db0a535e612 100644
--- a/third_party/libwebrtc/rtc_base/synchronization/yield_policy_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/synchronization/yield_policy_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -136,11 +135,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -165,6 +159,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -175,10 +176,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("yield_policy_gn")
diff --git a/third_party/libwebrtc/rtc_base/system/arch_gn/moz.build b/third_party/libwebrtc/rtc_base/system/arch_gn/moz.build
index 9e097c060ece..37d5eb9f295f 100644
--- a/third_party/libwebrtc/rtc_base/system/arch_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/system/arch_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("arch_gn")
diff --git a/third_party/libwebrtc/rtc_base/system/asm_defines_gn/moz.build b/third_party/libwebrtc/rtc_base/system/asm_defines_gn/moz.build
index 8ff211e954e7..c78e82d3fe2a 100644
--- a/third_party/libwebrtc/rtc_base/system/asm_defines_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/system/asm_defines_gn/moz.build
@@ -10,12 +10,7 @@ COMPILE_FLAGS["OS_INCLUDES"] = []
 AllowCompilerWarnings()
 
 DEFINES["ABSL_ALLOCATOR_NOTHROW"] = "1"
-DEFINES["ANDROID"] = True
-DEFINES["ANDROID_NDK_VERSION_ROLL"] = "r20_1"
-DEFINES["HAVE_SYS_UIO_H"] = True
 DEFINES["RTC_ENABLE_VP9"] = True
-DEFINES["WEBRTC_ANDROID"] = True
-DEFINES["WEBRTC_ANDROID_OPENSLES"] = True
 DEFINES["WEBRTC_ARCH_ARM"] = True
 DEFINES["WEBRTC_ARCH_ARM_V7"] = True
 DEFINES["WEBRTC_ENABLE_PROTOBUF"] = "0"
@@ -40,11 +35,6 @@ LOCAL_INCLUDES += [
     "/tools/profiler/public"
 ]
 
-OS_LIBS += [
-    "android_support",
-    "unwind"
-]
-
 if not CONFIG["MOZ_DEBUG"]:
 
     DEFINES["DYNAMIC_ANNOTATIONS_ENABLED"] = "0"
@@ -56,4 +46,32 @@ if CONFIG["MOZ_DEBUG"] == "1":
     DEFINES["DYNAMIC_ANNOTATIONS_ENABLED"] = "1"
     DEFINES["_DEBUG"] = True
 
+if CONFIG["OS_TARGET"] == "Android":
+
+    DEFINES["ANDROID"] = True
+    DEFINES["ANDROID_NDK_VERSION_ROLL"] = "r20_1"
+    DEFINES["HAVE_SYS_UIO_H"] = True
+    DEFINES["WEBRTC_ANDROID"] = True
+    DEFINES["WEBRTC_ANDROID_OPENSLES"] = True
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
+if CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["USE_AURA"] = "1"
+    DEFINES["USE_GLIB"] = "1"
+    DEFINES["USE_NSS_CERTS"] = "1"
+    DEFINES["USE_OZONE"] = "1"
+    DEFINES["USE_UDEV"] = True
+    DEFINES["_FILE_OFFSET_BITS"] = "64"
+    DEFINES["_LARGEFILE64_SOURCE"] = True
+    DEFINES["_LARGEFILE_SOURCE"] = True
+
+if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["USE_X11"] = "1"
+
 Library("asm_defines_gn")
diff --git a/third_party/libwebrtc/rtc_base/system/file_wrapper_gn/moz.build b/third_party/libwebrtc/rtc_base/system/file_wrapper_gn/moz.build
index bad34ada39c8..37fc7cfc1659 100644
--- a/third_party/libwebrtc/rtc_base/system/file_wrapper_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/system/file_wrapper_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -136,11 +135,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -165,6 +159,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -175,10 +176,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("file_wrapper_gn")
diff --git a/third_party/libwebrtc/rtc_base/system/ignore_warnings_gn/moz.build b/third_party/libwebrtc/rtc_base/system/ignore_warnings_gn/moz.build
index 8bf788372ddb..4ccf3744cb41 100644
--- a/third_party/libwebrtc/rtc_base/system/ignore_warnings_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/system/ignore_warnings_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("ignore_warnings_gn")
diff --git a/third_party/libwebrtc/rtc_base/system/inline_gn/moz.build b/third_party/libwebrtc/rtc_base/system/inline_gn/moz.build
index 715da99641e0..6632c7c906bd 100644
--- a/third_party/libwebrtc/rtc_base/system/inline_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/system/inline_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("inline_gn")
diff --git a/third_party/libwebrtc/rtc_base/system/rtc_export_gn/moz.build b/third_party/libwebrtc/rtc_base/system/rtc_export_gn/moz.build
index cea21728f363..2b01a6c41327 100644
--- a/third_party/libwebrtc/rtc_base/system/rtc_export_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/system/rtc_export_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rtc_export_gn")
diff --git a/third_party/libwebrtc/rtc_base/system/thread_registry_gn/moz.build b/third_party/libwebrtc/rtc_base/system/thread_registry_gn/moz.build
index f892e24e97b4..b8ef888289a7 100644
--- a/third_party/libwebrtc/rtc_base/system/thread_registry_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/system/thread_registry_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -132,11 +131,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -161,10 +155,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("thread_registry_gn")
diff --git a/third_party/libwebrtc/rtc_base/system/unused_gn/moz.build b/third_party/libwebrtc/rtc_base/system/unused_gn/moz.build
index d5991d6df8f3..5509ed80f3eb 100644
--- a/third_party/libwebrtc/rtc_base/system/unused_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/system/unused_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("unused_gn")
diff --git a/third_party/libwebrtc/rtc_base/system/warn_current_thread_is_deadlocked_gn/moz.build b/third_party/libwebrtc/rtc_base/system/warn_current_thread_is_deadlocked_gn/moz.build
index 922f2e21f209..79be38a5fcea 100644
--- a/third_party/libwebrtc/rtc_base/system/warn_current_thread_is_deadlocked_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/system/warn_current_thread_is_deadlocked_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("warn_current_thread_is_deadlocked_gn")
diff --git a/third_party/libwebrtc/rtc_base/task_utils/pending_task_safety_flag_gn/moz.build b/third_party/libwebrtc/rtc_base/task_utils/pending_task_safety_flag_gn/moz.build
index 60424907eef9..ad1b375c0b0d 100644
--- a/third_party/libwebrtc/rtc_base/task_utils/pending_task_safety_flag_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/task_utils/pending_task_safety_flag_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -136,11 +135,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -165,6 +159,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -175,10 +176,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("pending_task_safety_flag_gn")
diff --git a/third_party/libwebrtc/rtc_base/task_utils/repeating_task_gn/moz.build b/third_party/libwebrtc/rtc_base/task_utils/repeating_task_gn/moz.build
index 8a5b75e8d8fa..6f2570a95f09 100644
--- a/third_party/libwebrtc/rtc_base/task_utils/repeating_task_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/task_utils/repeating_task_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -147,11 +146,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -176,6 +170,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -186,10 +187,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("repeating_task_gn")
diff --git a/third_party/libwebrtc/rtc_base/task_utils/to_queued_task_gn/moz.build b/third_party/libwebrtc/rtc_base/task_utils/to_queued_task_gn/moz.build
index c5a12a6c884c..3303f5bb5949 100644
--- a/third_party/libwebrtc/rtc_base/task_utils/to_queued_task_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/task_utils/to_queued_task_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -128,11 +127,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -157,10 +151,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("to_queued_task_gn")
diff --git a/third_party/libwebrtc/rtc_base/third_party/base64/base64_gn/moz.build b/third_party/libwebrtc/rtc_base/third_party/base64/base64_gn/moz.build
index 04f71f58fa6b..fe1886165d68 100644
--- a/third_party/libwebrtc/rtc_base/third_party/base64/base64_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/third_party/base64/base64_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -132,11 +131,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -161,6 +155,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -171,10 +172,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("base64_gn")
diff --git a/third_party/libwebrtc/rtc_base/third_party/sigslot/sigslot_gn/moz.build b/third_party/libwebrtc/rtc_base/third_party/sigslot/sigslot_gn/moz.build
index 17099db760c4..8b527fdfbe54 100644
--- a/third_party/libwebrtc/rtc_base/third_party/sigslot/sigslot_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/third_party/sigslot/sigslot_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -132,11 +131,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -161,6 +155,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -171,10 +172,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("sigslot_gn")
diff --git a/third_party/libwebrtc/rtc_base/thread_checker_gn/moz.build b/third_party/libwebrtc/rtc_base/thread_checker_gn/moz.build
index b9d2da63ee8c..2469b6d79c69 100644
--- a/third_party/libwebrtc/rtc_base/thread_checker_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/thread_checker_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -128,11 +127,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -157,10 +151,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("thread_checker_gn")
diff --git a/third_party/libwebrtc/rtc_base/time/timestamp_extrapolator_gn/moz.build b/third_party/libwebrtc/rtc_base/time/timestamp_extrapolator_gn/moz.build
index ddbbed9b7463..27bf23bfc704 100644
--- a/third_party/libwebrtc/rtc_base/time/timestamp_extrapolator_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/time/timestamp_extrapolator_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -136,11 +135,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -165,6 +159,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -175,10 +176,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("timestamp_extrapolator_gn")
diff --git a/third_party/libwebrtc/rtc_base/timeutils_gn/moz.build b/third_party/libwebrtc/rtc_base/timeutils_gn/moz.build
index 3f0118214762..b82a9e574f7a 100644
--- a/third_party/libwebrtc/rtc_base/timeutils_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/timeutils_gn/moz.build
@@ -79,7 +79,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -142,11 +141,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -171,6 +165,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -181,10 +182,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("timeutils_gn")
diff --git a/third_party/libwebrtc/rtc_base/type_traits_gn/moz.build b/third_party/libwebrtc/rtc_base/type_traits_gn/moz.build
index 0235cd04d4a5..7a7f9ecb0a88 100644
--- a/third_party/libwebrtc/rtc_base/type_traits_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/type_traits_gn/moz.build
@@ -69,7 +69,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -124,11 +123,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -153,10 +147,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("type_traits_gn")
diff --git a/third_party/libwebrtc/rtc_base/units/unit_base_gn/moz.build b/third_party/libwebrtc/rtc_base/units/unit_base_gn/moz.build
index 93efa358f199..c6e8a0edb162 100644
--- a/third_party/libwebrtc/rtc_base/units/unit_base_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/units/unit_base_gn/moz.build
@@ -73,7 +73,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -128,11 +127,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -157,10 +151,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("unit_base_gn")
diff --git a/third_party/libwebrtc/rtc_base/weak_ptr_gn/moz.build b/third_party/libwebrtc/rtc_base/weak_ptr_gn/moz.build
index 69912a019e06..0934a884cdfa 100644
--- a/third_party/libwebrtc/rtc_base/weak_ptr_gn/moz.build
+++ b/third_party/libwebrtc/rtc_base/weak_ptr_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -136,11 +135,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -165,6 +159,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -175,10 +176,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("weak_ptr_gn")
diff --git a/third_party/libwebrtc/system_wrappers/field_trial_gn/moz.build b/third_party/libwebrtc/system_wrappers/field_trial_gn/moz.build
index de5687453546..a95460f990e5 100644
--- a/third_party/libwebrtc/system_wrappers/field_trial_gn/moz.build
+++ b/third_party/libwebrtc/system_wrappers/field_trial_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("field_trial_gn")
diff --git a/third_party/libwebrtc/system_wrappers/metrics_gn/moz.build b/third_party/libwebrtc/system_wrappers/metrics_gn/moz.build
index ad0cbf0d01a0..75e7b07f3e00 100644
--- a/third_party/libwebrtc/system_wrappers/metrics_gn/moz.build
+++ b/third_party/libwebrtc/system_wrappers/metrics_gn/moz.build
@@ -77,7 +77,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -140,11 +139,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -169,6 +163,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -179,10 +180,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("metrics_gn")
diff --git a/third_party/libwebrtc/system_wrappers/system_wrappers_gn/moz.build b/third_party/libwebrtc/system_wrappers/system_wrappers_gn/moz.build
index aaaa63784215..e5363ed34740 100644
--- a/third_party/libwebrtc/system_wrappers/system_wrappers_gn/moz.build
+++ b/third_party/libwebrtc/system_wrappers/system_wrappers_gn/moz.build
@@ -87,7 +87,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -161,11 +160,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -190,6 +184,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -200,10 +201,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("system_wrappers_gn")
diff --git a/third_party/libwebrtc/test/rtp_test_utils_gn/moz.build b/third_party/libwebrtc/test/rtp_test_utils_gn/moz.build
index 17282b9222cf..137a0d97034a 100644
--- a/third_party/libwebrtc/test/rtp_test_utils_gn/moz.build
+++ b/third_party/libwebrtc/test/rtp_test_utils_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -149,11 +148,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -178,6 +172,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -188,10 +189,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rtp_test_utils_gn")
diff --git a/third_party/libwebrtc/third_party/abseil-cpp/absl/algorithm/algorithm_gn/moz.build b/third_party/libwebrtc/third_party/abseil-cpp/absl/algorithm/algorithm_gn/moz.build
index e7ec08362c24..5fe12561bce8 100644
--- a/third_party/libwebrtc/third_party/abseil-cpp/absl/algorithm/algorithm_gn/moz.build
+++ b/third_party/libwebrtc/third_party/abseil-cpp/absl/algorithm/algorithm_gn/moz.build
@@ -52,7 +52,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["USE_OZONE"] = "1"
     DEFINES["USE_UDEV"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
 
@@ -90,13 +89,6 @@ if CONFIG["OS_TARGET"] == "WINNT":
     DEFINES["_WINDOWS"] = True
     DEFINES["__STD_C"] = True
 
-if CONFIG["CPU_ARCH"] == "arm":
-
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -121,10 +113,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("algorithm_gn")
diff --git a/third_party/libwebrtc/third_party/abseil-cpp/absl/algorithm/container_gn/moz.build b/third_party/libwebrtc/third_party/abseil-cpp/absl/algorithm/container_gn/moz.build
index 459f50119e8b..630af3526021 100644
--- a/third_party/libwebrtc/third_party/abseil-cpp/absl/algorithm/container_gn/moz.build
+++ b/third_party/libwebrtc/third_party/abseil-cpp/absl/algorithm/container_gn/moz.build
@@ -52,7 +52,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["USE_OZONE"] = "1"
     DEFINES["USE_UDEV"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
 
@@ -90,13 +89,6 @@ if CONFIG["OS_TARGET"] == "WINNT":
     DEFINES["_WINDOWS"] = True
     DEFINES["__STD_C"] = True
 
-if CONFIG["CPU_ARCH"] == "arm":
-
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -121,10 +113,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("container_gn")
diff --git a/third_party/libwebrtc/third_party/abseil-cpp/absl/base/atomic_hook_gn/moz.build b/third_party/libwebrtc/third_party/abseil-cpp/absl/base/atomic_hook_gn/moz.build
index 88c576bac924..5faed87779ac 100644
--- a/third_party/libwebrtc/third_party/abseil-cpp/absl/base/atomic_hook_gn/moz.build
+++ b/third_party/libwebrtc/third_party/abseil-cpp/absl/base/atomic_hook_gn/moz.build
@@ -52,7 +52,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["USE_OZONE"] = "1"
     DEFINES["USE_UDEV"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
 
@@ -90,13 +89,6 @@ if CONFIG["OS_TARGET"] == "WINNT":
     DEFINES["_WINDOWS"] = True
     DEFINES["__STD_C"] = True
 
-if CONFIG["CPU_ARCH"] == "arm":
-
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -121,10 +113,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("atomic_hook_gn")
diff --git a/third_party/libwebrtc/third_party/abseil-cpp/absl/base/base_internal_gn/moz.build b/third_party/libwebrtc/third_party/abseil-cpp/absl/base/base_internal_gn/moz.build
index b6dbc4831206..039d5a2ca43d 100644
--- a/third_party/libwebrtc/third_party/abseil-cpp/absl/base/base_internal_gn/moz.build
+++ b/third_party/libwebrtc/third_party/abseil-cpp/absl/base/base_internal_gn/moz.build
@@ -52,7 +52,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["USE_OZONE"] = "1"
     DEFINES["USE_UDEV"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
 
@@ -90,13 +89,6 @@ if CONFIG["OS_TARGET"] == "WINNT":
     DEFINES["_WINDOWS"] = True
     DEFINES["__STD_C"] = True
 
-if CONFIG["CPU_ARCH"] == "arm":
-
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -121,10 +113,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("base_internal_gn")
diff --git a/third_party/libwebrtc/third_party/abseil-cpp/absl/base/config_gn/moz.build b/third_party/libwebrtc/third_party/abseil-cpp/absl/base/config_gn/moz.build
index d60a3ca6b7ed..c1b4dec3de4d 100644
--- a/third_party/libwebrtc/third_party/abseil-cpp/absl/base/config_gn/moz.build
+++ b/third_party/libwebrtc/third_party/abseil-cpp/absl/base/config_gn/moz.build
@@ -52,7 +52,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["USE_OZONE"] = "1"
     DEFINES["USE_UDEV"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
 
@@ -90,13 +89,6 @@ if CONFIG["OS_TARGET"] == "WINNT":
     DEFINES["_WINDOWS"] = True
     DEFINES["__STD_C"] = True
 
-if CONFIG["CPU_ARCH"] == "arm":
-
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -121,10 +113,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("config_gn")
diff --git a/third_party/libwebrtc/third_party/abseil-cpp/absl/base/core_headers_gn/moz.build b/third_party/libwebrtc/third_party/abseil-cpp/absl/base/core_headers_gn/moz.build
index 85745df10c47..652e6a65967f 100644
--- a/third_party/libwebrtc/third_party/abseil-cpp/absl/base/core_headers_gn/moz.build
+++ b/third_party/libwebrtc/third_party/abseil-cpp/absl/base/core_headers_gn/moz.build
@@ -52,7 +52,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["USE_OZONE"] = "1"
     DEFINES["USE_UDEV"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
 
@@ -90,13 +89,6 @@ if CONFIG["OS_TARGET"] == "WINNT":
     DEFINES["_WINDOWS"] = True
     DEFINES["__STD_C"] = True
 
-if CONFIG["CPU_ARCH"] == "arm":
-
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -121,10 +113,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("core_headers_gn")
diff --git a/third_party/libwebrtc/third_party/abseil-cpp/absl/base/log_severity_gn/moz.build b/third_party/libwebrtc/third_party/abseil-cpp/absl/base/log_severity_gn/moz.build
index 44ab35fde497..8a106d7421e8 100644
--- a/third_party/libwebrtc/third_party/abseil-cpp/absl/base/log_severity_gn/moz.build
+++ b/third_party/libwebrtc/third_party/abseil-cpp/absl/base/log_severity_gn/moz.build
@@ -56,7 +56,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["USE_OZONE"] = "1"
     DEFINES["USE_UDEV"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
 
@@ -100,11 +99,6 @@ if CONFIG["CPU_ARCH"] == "arm":
         "-mfpu=neon"
     ]
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -129,6 +123,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -139,10 +140,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("log_severity_gn")
diff --git a/third_party/libwebrtc/third_party/abseil-cpp/absl/base/raw_logging_internal_gn/moz.build b/third_party/libwebrtc/third_party/abseil-cpp/absl/base/raw_logging_internal_gn/moz.build
index d5e6e2bf6d20..2445527602c9 100644
--- a/third_party/libwebrtc/third_party/abseil-cpp/absl/base/raw_logging_internal_gn/moz.build
+++ b/third_party/libwebrtc/third_party/abseil-cpp/absl/base/raw_logging_internal_gn/moz.build
@@ -56,7 +56,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["USE_OZONE"] = "1"
     DEFINES["USE_UDEV"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
 
@@ -100,11 +99,6 @@ if CONFIG["CPU_ARCH"] == "arm":
         "-mfpu=neon"
     ]
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -129,6 +123,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -139,10 +140,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("raw_logging_internal_gn")
diff --git a/third_party/libwebrtc/third_party/abseil-cpp/absl/container/compressed_tuple_gn/moz.build b/third_party/libwebrtc/third_party/abseil-cpp/absl/container/compressed_tuple_gn/moz.build
index b3b0e076fbff..cd7fed08714c 100644
--- a/third_party/libwebrtc/third_party/abseil-cpp/absl/container/compressed_tuple_gn/moz.build
+++ b/third_party/libwebrtc/third_party/abseil-cpp/absl/container/compressed_tuple_gn/moz.build
@@ -52,7 +52,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["USE_OZONE"] = "1"
     DEFINES["USE_UDEV"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
 
@@ -90,13 +89,6 @@ if CONFIG["OS_TARGET"] == "WINNT":
     DEFINES["_WINDOWS"] = True
     DEFINES["__STD_C"] = True
 
-if CONFIG["CPU_ARCH"] == "arm":
-
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -121,10 +113,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("compressed_tuple_gn")
diff --git a/third_party/libwebrtc/third_party/abseil-cpp/absl/container/flat_hash_map_gn/moz.build b/third_party/libwebrtc/third_party/abseil-cpp/absl/container/flat_hash_map_gn/moz.build
index 8ebc5b523840..c04bd9ad5d68 100644
--- a/third_party/libwebrtc/third_party/abseil-cpp/absl/container/flat_hash_map_gn/moz.build
+++ b/third_party/libwebrtc/third_party/abseil-cpp/absl/container/flat_hash_map_gn/moz.build
@@ -52,7 +52,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["USE_OZONE"] = "1"
     DEFINES["USE_UDEV"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
 
@@ -90,13 +89,6 @@ if CONFIG["OS_TARGET"] == "WINNT":
     DEFINES["_WINDOWS"] = True
     DEFINES["__STD_C"] = True
 
-if CONFIG["CPU_ARCH"] == "arm":
-
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -121,10 +113,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("flat_hash_map_gn")
diff --git a/third_party/libwebrtc/third_party/abseil-cpp/absl/container/inlined_vector_gn/moz.build b/third_party/libwebrtc/third_party/abseil-cpp/absl/container/inlined_vector_gn/moz.build
index 59b6d217a4f9..36df98d790fa 100644
--- a/third_party/libwebrtc/third_party/abseil-cpp/absl/container/inlined_vector_gn/moz.build
+++ b/third_party/libwebrtc/third_party/abseil-cpp/absl/container/inlined_vector_gn/moz.build
@@ -52,7 +52,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["USE_OZONE"] = "1"
     DEFINES["USE_UDEV"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
 
@@ -90,13 +89,6 @@ if CONFIG["OS_TARGET"] == "WINNT":
     DEFINES["_WINDOWS"] = True
     DEFINES["__STD_C"] = True
 
-if CONFIG["CPU_ARCH"] == "arm":
-
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -121,10 +113,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("inlined_vector_gn")
diff --git a/third_party/libwebrtc/third_party/abseil-cpp/absl/container/inlined_vector_internal_gn/moz.build b/third_party/libwebrtc/third_party/abseil-cpp/absl/container/inlined_vector_internal_gn/moz.build
index 421f42ed6ac6..b5f65b9c7324 100644
--- a/third_party/libwebrtc/third_party/abseil-cpp/absl/container/inlined_vector_internal_gn/moz.build
+++ b/third_party/libwebrtc/third_party/abseil-cpp/absl/container/inlined_vector_internal_gn/moz.build
@@ -52,7 +52,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["USE_OZONE"] = "1"
     DEFINES["USE_UDEV"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
 
@@ -90,13 +89,6 @@ if CONFIG["OS_TARGET"] == "WINNT":
     DEFINES["_WINDOWS"] = True
     DEFINES["__STD_C"] = True
 
-if CONFIG["CPU_ARCH"] == "arm":
-
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -121,10 +113,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("inlined_vector_internal_gn")
diff --git a/third_party/libwebrtc/third_party/abseil-cpp/absl/memory/memory_gn/moz.build b/third_party/libwebrtc/third_party/abseil-cpp/absl/memory/memory_gn/moz.build
index f9e9fe1859b3..f0a2b489ba7b 100644
--- a/third_party/libwebrtc/third_party/abseil-cpp/absl/memory/memory_gn/moz.build
+++ b/third_party/libwebrtc/third_party/abseil-cpp/absl/memory/memory_gn/moz.build
@@ -52,7 +52,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["USE_OZONE"] = "1"
     DEFINES["USE_UDEV"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
 
@@ -90,13 +89,6 @@ if CONFIG["OS_TARGET"] == "WINNT":
     DEFINES["_WINDOWS"] = True
     DEFINES["__STD_C"] = True
 
-if CONFIG["CPU_ARCH"] == "arm":
-
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -121,10 +113,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("memory_gn")
diff --git a/third_party/libwebrtc/third_party/abseil-cpp/absl/meta/type_traits_gn/moz.build b/third_party/libwebrtc/third_party/abseil-cpp/absl/meta/type_traits_gn/moz.build
index e3ea4178efc9..6114f68114ee 100644
--- a/third_party/libwebrtc/third_party/abseil-cpp/absl/meta/type_traits_gn/moz.build
+++ b/third_party/libwebrtc/third_party/abseil-cpp/absl/meta/type_traits_gn/moz.build
@@ -52,7 +52,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["USE_OZONE"] = "1"
     DEFINES["USE_UDEV"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
 
@@ -90,13 +89,6 @@ if CONFIG["OS_TARGET"] == "WINNT":
     DEFINES["_WINDOWS"] = True
     DEFINES["__STD_C"] = True
 
-if CONFIG["CPU_ARCH"] == "arm":
-
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -121,10 +113,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("type_traits_gn")
diff --git a/third_party/libwebrtc/third_party/abseil-cpp/absl/numeric/int128_gn/moz.build b/third_party/libwebrtc/third_party/abseil-cpp/absl/numeric/int128_gn/moz.build
index 39badc7e0341..69affa55af2e 100644
--- a/third_party/libwebrtc/third_party/abseil-cpp/absl/numeric/int128_gn/moz.build
+++ b/third_party/libwebrtc/third_party/abseil-cpp/absl/numeric/int128_gn/moz.build
@@ -56,7 +56,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["USE_OZONE"] = "1"
     DEFINES["USE_UDEV"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
 
@@ -100,11 +99,6 @@ if CONFIG["CPU_ARCH"] == "arm":
         "-mfpu=neon"
     ]
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -129,6 +123,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -139,10 +140,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("int128_gn")
diff --git a/third_party/libwebrtc/third_party/abseil-cpp/absl/strings/internal_gn/moz.build b/third_party/libwebrtc/third_party/abseil-cpp/absl/strings/internal_gn/moz.build
index 7e46bc347c15..3742d55f8420 100644
--- a/third_party/libwebrtc/third_party/abseil-cpp/absl/strings/internal_gn/moz.build
+++ b/third_party/libwebrtc/third_party/abseil-cpp/absl/strings/internal_gn/moz.build
@@ -58,7 +58,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["USE_OZONE"] = "1"
     DEFINES["USE_UDEV"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
 
@@ -102,11 +101,6 @@ if CONFIG["CPU_ARCH"] == "arm":
         "-mfpu=neon"
     ]
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -131,6 +125,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -141,10 +142,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("internal_gn")
diff --git a/third_party/libwebrtc/third_party/abseil-cpp/absl/strings/strings_gn/moz.build b/third_party/libwebrtc/third_party/abseil-cpp/absl/strings/strings_gn/moz.build
index 0930e8268321..c0b3ff9df0b9 100644
--- a/third_party/libwebrtc/third_party/abseil-cpp/absl/strings/strings_gn/moz.build
+++ b/third_party/libwebrtc/third_party/abseil-cpp/absl/strings/strings_gn/moz.build
@@ -71,7 +71,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["USE_OZONE"] = "1"
     DEFINES["USE_UDEV"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
 
@@ -115,11 +114,6 @@ if CONFIG["CPU_ARCH"] == "arm":
         "-mfpu=neon"
     ]
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -144,6 +138,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -154,10 +155,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("strings_gn")
diff --git a/third_party/libwebrtc/third_party/abseil-cpp/absl/types/bad_optional_access_gn/moz.build b/third_party/libwebrtc/third_party/abseil-cpp/absl/types/bad_optional_access_gn/moz.build
index 3a9117056235..2bd4896cfc2c 100644
--- a/third_party/libwebrtc/third_party/abseil-cpp/absl/types/bad_optional_access_gn/moz.build
+++ b/third_party/libwebrtc/third_party/abseil-cpp/absl/types/bad_optional_access_gn/moz.build
@@ -56,7 +56,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["USE_OZONE"] = "1"
     DEFINES["USE_UDEV"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
 
@@ -100,11 +99,6 @@ if CONFIG["CPU_ARCH"] == "arm":
         "-mfpu=neon"
     ]
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -129,6 +123,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -139,10 +140,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("bad_optional_access_gn")
diff --git a/third_party/libwebrtc/third_party/abseil-cpp/absl/types/bad_variant_access_gn/moz.build b/third_party/libwebrtc/third_party/abseil-cpp/absl/types/bad_variant_access_gn/moz.build
index 5808130012ea..349a94d61f55 100644
--- a/third_party/libwebrtc/third_party/abseil-cpp/absl/types/bad_variant_access_gn/moz.build
+++ b/third_party/libwebrtc/third_party/abseil-cpp/absl/types/bad_variant_access_gn/moz.build
@@ -56,7 +56,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["USE_OZONE"] = "1"
     DEFINES["USE_UDEV"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
 
@@ -100,11 +99,6 @@ if CONFIG["CPU_ARCH"] == "arm":
         "-mfpu=neon"
     ]
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -129,6 +123,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -139,10 +140,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("bad_variant_access_gn")
diff --git a/third_party/libwebrtc/third_party/abseil-cpp/absl/types/optional_gn/moz.build b/third_party/libwebrtc/third_party/abseil-cpp/absl/types/optional_gn/moz.build
index 175ea37f849c..3d21756a392e 100644
--- a/third_party/libwebrtc/third_party/abseil-cpp/absl/types/optional_gn/moz.build
+++ b/third_party/libwebrtc/third_party/abseil-cpp/absl/types/optional_gn/moz.build
@@ -52,7 +52,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["USE_OZONE"] = "1"
     DEFINES["USE_UDEV"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
 
@@ -90,13 +89,6 @@ if CONFIG["OS_TARGET"] == "WINNT":
     DEFINES["_WINDOWS"] = True
     DEFINES["__STD_C"] = True
 
-if CONFIG["CPU_ARCH"] == "arm":
-
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -121,10 +113,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("optional_gn")
diff --git a/third_party/libwebrtc/third_party/abseil-cpp/absl/types/span_gn/moz.build b/third_party/libwebrtc/third_party/abseil-cpp/absl/types/span_gn/moz.build
index 106d55b1407d..959c548b476d 100644
--- a/third_party/libwebrtc/third_party/abseil-cpp/absl/types/span_gn/moz.build
+++ b/third_party/libwebrtc/third_party/abseil-cpp/absl/types/span_gn/moz.build
@@ -52,7 +52,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["USE_OZONE"] = "1"
     DEFINES["USE_UDEV"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
 
@@ -90,13 +89,6 @@ if CONFIG["OS_TARGET"] == "WINNT":
     DEFINES["_WINDOWS"] = True
     DEFINES["__STD_C"] = True
 
-if CONFIG["CPU_ARCH"] == "arm":
-
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -121,10 +113,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("span_gn")
diff --git a/third_party/libwebrtc/third_party/abseil-cpp/absl/types/variant_gn/moz.build b/third_party/libwebrtc/third_party/abseil-cpp/absl/types/variant_gn/moz.build
index 9ba72b7037e9..b11a71fd0c62 100644
--- a/third_party/libwebrtc/third_party/abseil-cpp/absl/types/variant_gn/moz.build
+++ b/third_party/libwebrtc/third_party/abseil-cpp/absl/types/variant_gn/moz.build
@@ -52,7 +52,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["USE_OZONE"] = "1"
     DEFINES["USE_UDEV"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
 
@@ -90,13 +89,6 @@ if CONFIG["OS_TARGET"] == "WINNT":
     DEFINES["_WINDOWS"] = True
     DEFINES["__STD_C"] = True
 
-if CONFIG["CPU_ARCH"] == "arm":
-
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -121,10 +113,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("variant_gn")
diff --git a/third_party/libwebrtc/third_party/abseil-cpp/absl/utility/utility_gn/moz.build b/third_party/libwebrtc/third_party/abseil-cpp/absl/utility/utility_gn/moz.build
index 216ae1445304..5e5dbc641bfe 100644
--- a/third_party/libwebrtc/third_party/abseil-cpp/absl/utility/utility_gn/moz.build
+++ b/third_party/libwebrtc/third_party/abseil-cpp/absl/utility/utility_gn/moz.build
@@ -52,7 +52,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["USE_OZONE"] = "1"
     DEFINES["USE_UDEV"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
 
@@ -90,13 +89,6 @@ if CONFIG["OS_TARGET"] == "WINNT":
     DEFINES["_WINDOWS"] = True
     DEFINES["__STD_C"] = True
 
-if CONFIG["CPU_ARCH"] == "arm":
-
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -121,10 +113,33 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("utility_gn")
diff --git a/third_party/libwebrtc/third_party/pffft/pffft_gn/moz.build b/third_party/libwebrtc/third_party/pffft/pffft_gn/moz.build
index bca74a49a5b2..9f368c5bea1c 100644
--- a/third_party/libwebrtc/third_party/pffft/pffft_gn/moz.build
+++ b/third_party/libwebrtc/third_party/pffft/pffft_gn/moz.build
@@ -57,7 +57,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["USE_OZONE"] = "1"
     DEFINES["USE_UDEV"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -104,10 +103,9 @@ if CONFIG["CPU_ARCH"] == "arm":
         "-mfpu=neon"
     ]
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
+if CONFIG["CPU_ARCH"] == "ppc64":
+
+    DEFINES["PFFFT_SIMD_DISABLE"] = True
 
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
@@ -133,6 +131,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CFLAGS += [
@@ -143,10 +148,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("pffft_gn")
diff --git a/third_party/libwebrtc/third_party/rnnoise/rnn_vad_gn/moz.build b/third_party/libwebrtc/third_party/rnnoise/rnn_vad_gn/moz.build
index 19df2b315543..4d82cbfa21a5 100644
--- a/third_party/libwebrtc/third_party/rnnoise/rnn_vad_gn/moz.build
+++ b/third_party/libwebrtc/third_party/rnnoise/rnn_vad_gn/moz.build
@@ -57,7 +57,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["USE_OZONE"] = "1"
     DEFINES["USE_UDEV"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -103,11 +102,6 @@ if CONFIG["CPU_ARCH"] == "arm":
         "-mfpu=neon"
     ]
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -132,6 +126,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -142,10 +143,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("rnn_vad_gn")
diff --git a/third_party/libwebrtc/video/adaptation/video_adaptation_gn/moz.build b/third_party/libwebrtc/video/adaptation/video_adaptation_gn/moz.build
index 7e4d8c8722ef..d4504c740c91 100644
--- a/third_party/libwebrtc/video/adaptation/video_adaptation_gn/moz.build
+++ b/third_party/libwebrtc/video/adaptation/video_adaptation_gn/moz.build
@@ -85,7 +85,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -156,11 +155,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -185,6 +179,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -195,10 +196,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("video_adaptation_gn")
diff --git a/third_party/libwebrtc/video/frame_dumping_decoder_gn/moz.build b/third_party/libwebrtc/video/frame_dumping_decoder_gn/moz.build
index 1e30a499e53c..addd74837347 100644
--- a/third_party/libwebrtc/video/frame_dumping_decoder_gn/moz.build
+++ b/third_party/libwebrtc/video/frame_dumping_decoder_gn/moz.build
@@ -78,7 +78,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -149,11 +148,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -178,6 +172,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -188,10 +189,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("frame_dumping_decoder_gn")
diff --git a/third_party/libwebrtc/video/video_gn/moz.build b/third_party/libwebrtc/video/video_gn/moz.build
index e7069fc5a3ff..32f507080486 100644
--- a/third_party/libwebrtc/video/video_gn/moz.build
+++ b/third_party/libwebrtc/video/video_gn/moz.build
@@ -107,7 +107,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -178,11 +177,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -207,6 +201,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -217,10 +218,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("video_gn")
diff --git a/third_party/libwebrtc/video/video_stream_encoder_impl_gn/moz.build b/third_party/libwebrtc/video/video_stream_encoder_impl_gn/moz.build
index 12943b85c586..a4e180638985 100644
--- a/third_party/libwebrtc/video/video_stream_encoder_impl_gn/moz.build
+++ b/third_party/libwebrtc/video/video_stream_encoder_impl_gn/moz.build
@@ -83,7 +83,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -154,11 +153,6 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
-    OS_LIBS += [
-        "android_support",
-        "unwind"
-    ]
-
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
 
     DEFINES["_DEBUG"] = True
@@ -183,6 +177,13 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
 
     DEFINES["USE_X11"] = "1"
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     CXXFLAGS += [
@@ -193,10 +194,24 @@ if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
 
     CXXFLAGS += [
         "-msse2"
     ]
 
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
 Library("video_stream_encoder_impl_gn")
diff --git a/third_party/libwebrtc/webrtc_gn/moz.build b/third_party/libwebrtc/webrtc_gn/moz.build
index ebef95840599..f1195473488c 100644
--- a/third_party/libwebrtc/webrtc_gn/moz.build
+++ b/third_party/libwebrtc/webrtc_gn/moz.build
@@ -74,7 +74,6 @@ if CONFIG["OS_TARGET"] == "Linux":
     DEFINES["WEBRTC_LINUX"] = True
     DEFINES["WEBRTC_POSIX"] = True
     DEFINES["_FILE_OFFSET_BITS"] = "64"
-    DEFINES["_GNU_SOURCE"] = True
     DEFINES["_LARGEFILE64_SOURCE"] = True
     DEFINES["_LARGEFILE_SOURCE"] = True
     DEFINES["__STDC_CONSTANT_MACROS"] = True
@@ -82,7 +81,6 @@ if CONFIG["OS_TARGET"] == "Linux":
 
     OS_LIBS += [
         "dl",
-        "m",
         "rt"
     ]
 
@@ -159,9 +157,10 @@ if CONFIG["CPU_ARCH"] == "arm":
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True
 
+if CONFIG["CPU_ARCH"] == "ppc64":
+
     OS_LIBS += [
-        "android_support",
-        "unwind"
+        "m"
     ]
 
 if CONFIG["MOZ_DEBUG"] == "1" and CONFIG["OS_TARGET"] == "Android":
@@ -199,10 +198,45 @@ if CONFIG["MOZ_X11"] == "1" and CONFIG["OS_TARGET"] == "Linux":
         "Xtst"
     ]
 
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Android":
+
+    OS_LIBS += [
+        "android_support",
+        "unwind"
+    ]
+
 if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Android":
 
     OS_LIBS += [
         "android_support"
     ]
 
+if CONFIG["CPU_ARCH"] == "aarch64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+    OS_LIBS += [
+        "m"
+    ]
+
+if CONFIG["CPU_ARCH"] == "arm" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+if CONFIG["CPU_ARCH"] == "x86" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+    OS_LIBS += [
+        "m"
+    ]
+
+if CONFIG["CPU_ARCH"] == "x86_64" and CONFIG["OS_TARGET"] == "Linux":
+
+    DEFINES["_GNU_SOURCE"] = True
+
+    OS_LIBS += [
+        "m"
+    ]
+
 Library("webrtc_gn")