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",