diff -r 000000000000 -r 6474c204b198 xpcom/reflect/xptcall/src/md/unix/xptc_gcc_x86_unix.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/xpcom/reflect/xptcall/src/md/unix/xptc_gcc_x86_unix.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,17 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* 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/. */
+
+/* Special include file for xptc*_gcc_x86_unix.cpp */
+
+// 
+// this may improve the static function calls, but may not.
+//
+
+#ifdef MOZ_NEED_LEADING_UNDERSCORE
+#define SYMBOL_UNDERSCORE "_"
+#else
+#define SYMBOL_UNDERSCORE
+#endif
+