diff -ur qtwebengine-opensource-src-5.6.0-beta/src/3rdparty/chromium/build/common.gypi qtwebengine-opensource-src-5.6.0-beta-no-format/src/3rdparty/chromium/build/common.gypi
--- qtwebengine-opensource-src-5.6.0-beta/src/3rdparty/chromium/build/common.gypi	2015-12-10 18:17:21.000000000 +0100
+++ qtwebengine-opensource-src-5.6.0-beta-no-format/src/3rdparty/chromium/build/common.gypi	2016-01-05 05:58:55.336938182 +0100
@@ -3142,11 +3142,6 @@
               # Don't warn about hash_map in third-party code.
               '-Wno-deprecated',
             ],
-            'cflags': [
-              # Don't warn about printf format problems.
-              # This is off by default in gcc but on in Ubuntu's gcc(!).
-              '-Wno-format',
-            ],
             'cflags_cc!': [
               # Necessary because llvm.org/PR10448 is WONTFIX (crbug.com/90453).
               '-Wsign-compare',
diff -ur qtwebengine-opensource-src-5.6.0-beta/src/3rdparty/chromium/build/config/compiler/BUILD.gn qtwebengine-opensource-src-5.6.0-beta-no-format/src/3rdparty/chromium/build/config/compiler/BUILD.gn
--- qtwebengine-opensource-src-5.6.0-beta/src/3rdparty/chromium/build/config/compiler/BUILD.gn	2015-12-10 18:17:21.000000000 +0100
+++ qtwebengine-opensource-src-5.6.0-beta-no-format/src/3rdparty/chromium/build/config/compiler/BUILD.gn	2016-01-05 05:58:55.362938322 +0100
@@ -1013,11 +1013,6 @@
   }
 
   if (is_linux || is_android) {
-    cflags += [
-      # Don't warn about printf format problems. This is off by default in gcc
-      # but on in Ubuntu's gcc(!).
-      "-Wno-format",
-    ]
     cflags_cc += [
       # Don't warn about hash_map in third-party code.
       "-Wno-deprecated",