diff -r 000000000000 -r 6474c204b198 xpcom/xpcom-config.h.in
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/xpcom/xpcom-config.h.in	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,37 @@
+/* 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/. */
+
+/* Global defines needed by xpcom clients */
+
+#ifndef _XPCOM_CONFIG_H_
+#define _XPCOM_CONFIG_H_
+
+/* Define this to throw() if the compiler complains about 
+ * constructors returning NULL
+ */
+#undef CPP_THROW_NEW
+
+/* Define if the c++ compiler can resolve ambiguity with |using| */
+#undef HAVE_CPP_AMBIGUITY_RESOLVING_USING
+
+/* Define if a dyanmic_cast to void* gives the most derived object */
+#undef HAVE_CPP_DYNAMIC_CAST_TO_VOID_PTR
+
+/* Define if the c++ compiler has trouble comparing a constant
+ * reference to a templatized class to zero
+ */
+#undef HAVE_CPP_TROUBLE_COMPARING_TO_ZERO
+
+/* Define if the c++ compiler requires implementations of 
+ * unused virtual methods
+ */
+#undef NEED_CPP_UNUSED_IMPLEMENTATIONS
+
+/* Define to either __attribute__((malloc)) or nothing */
+#undef NS_ATTR_MALLOC
+
+/* Define to either __attribute__((warn_unused_result)) or nothing */
+#undef NS_WARN_UNUSED_RESULT
+
+#endif /* _XPCOM_CONFIG_H_ */