diff -up qtwebengine-everywhere-src-5.10.0/src/3rdparty/chromium/tools/gn/bootstrap/bootstrap.py.QTBUG-64759 qtwebengine-everywhere-src-5.10.0/src/3rdparty/chromium/tools/gn/bootstrap/bootstrap.py
--- qtwebengine-everywhere-src-5.10.0/src/3rdparty/chromium/tools/gn/bootstrap/bootstrap.py.QTBUG-64759	2018-02-16 12:52:27.991861536 -0600
+++ qtwebengine-everywhere-src-5.10.0/src/3rdparty/chromium/tools/gn/bootstrap/bootstrap.py	2018-02-16 13:16:30.778130158 -0600
@@ -331,6 +331,9 @@ def write_gn_ninja(path, root_gen_dir, o
   cflags_cc = []
   ldflags = []
 
+  cflags.extend(['-fabi-version=11'])
+  cflags_cc.extend(['-fabi-version=11'])
+
   include_dirs = [root_gen_dir, SRC_ROOT]
   libs = []