diff -up mozilla-aurora/media/libstagefright/moz.build.no-format mozilla-aurora/media/libstagefright/moz.build
--- mozilla-aurora/media/libstagefright/moz.build.no-format	2015-03-16 13:39:35.861598410 +0100
+++ mozilla-aurora/media/libstagefright/moz.build	2015-03-16 13:39:39.710557344 +0100
@@ -141,7 +141,6 @@ elif CONFIG['GNU_CXX']:
         '-Wno-sign-compare'
     ]
     CXXFLAGS += [
-        '-Wno-format',
         '-Wno-multichar',
         '-Wno-sign-compare',
         '-Wno-unused',