diff -r 000000000000 -r 6474c204b198 memory/replace/jemalloc/pthread_atfork.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/memory/replace/jemalloc/pthread_atfork.c	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,10 @@
+/* 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/. */
+
+int pthread_atfork(void (*prefork)(void),
+                   void (*postfork_parent)(void),
+                   void (*postfork_child)(void))
+{
+  return 0;
+}