diff -r 000000000000 -r 6474c204b198 xulrunner/config/mozconfigs/common
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/xulrunner/config/mozconfigs/common	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,9 @@
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+# This file is included at the top of all xulrunner mozconfigs
+
+. "$topsrcdir/build/mozconfig.common"
+
+ac_add_options --disable-unified-compilation