diff -r 000000000000 -r 6474c204b198 memory/replace/dummy/dummy_replace_malloc.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/memory/replace/dummy/dummy_replace_malloc.c	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,15 @@
+/* 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/. */
+
+#include "mozilla/Types.h"
+
+/*
+ * Dummy functions for linking purpose on OSX with older XCode.
+ * See details in configure.in, under "Replace-malloc Mac linkage quirks"
+ */
+#define MALLOC_FUNCS MALLOC_FUNCS_ALL
+#define MALLOC_DECL(name, ...) \
+  MOZ_EXPORT void replace_ ## name() { }
+
+#include "malloc_decls.h"