diff -r 000000000000 -r 6474c204b198 extensions/pref/autoconfig/src/Makefile.in
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/extensions/pref/autoconfig/src/Makefile.in	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,21 @@
+# 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/.
+
+AUTOCFG_JS_EXPORTS = \
+		$(srcdir)/prefcalls.js \
+		$(NULL)
+
+ifeq (cocoa,$(MOZ_WIDGET_TOOLKIT))
+AUTOCFG_JS_EXPORTS += $(srcdir)/mac/platform.js
+else
+ifeq ($(MOZ_WIDGET_TOOLKIT), windows)
+AUTOCFG_JS_EXPORTS += $(srcdir)/win/platform.js
+else
+ifeq ($(MOZ_WIDGET_TOOLKIT), beos)
+AUTOCFG_JS_EXPORTS += $(srcdir)/beos/platform.js
+else
+AUTOCFG_JS_EXPORTS += $(srcdir)/unix/platform.js
+endif
+endif
+endif