Bug 986794 - Suppress clang warnings in third-party code: libopus and libtheora. r=derf

media/libopus/moz.build

@@ -67,3 +67,9 @@ else:
         'silk/fixed',
     ]
     SOURCES += silk_sources_fixed
+
+# Suppress warnings in third-party code.
+if CONFIG['GNU_CC']:
+    CFLAGS += ['-Wno-declaration-after-statement']
+    if CONFIG['CLANG_CXX']:
+        CFLAGS += ['-Wno-\#pragma-messages']

media/libtheora/lib/moz.build

@@ -78,5 +78,7 @@ FINAL_LIBRARY = 'gkmedias'
 DEFINES['THEORA_DISABLE_ENCODE'] = True
 
 # Suppress warnings in third-party code.
-if CONFIG['CLANG_CXX']:
-    CFLAGS += ['-Wno-tautological-compare']
+if CONFIG['GNU_CC']:
+    CFLAGS += ['-Wno-type-limits']
+    if CONFIG['CLANG_CXX']:
+        CFLAGS += ['-Wno-tautological-compare']