diff -r 000000000000 -r 6474c204b198 js/xpconnect/loader/moz.build
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/xpconnect/loader/moz.build	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,33 @@
+# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# 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/.
+
+# These files cannot be built in unified mode because they rely on plarena.h
+# and they want to force NSPR logging.
+SOURCES += [
+    'mozJSComponentLoader.cpp',
+    'mozJSLoaderUtils.cpp',
+    'mozJSSubScriptLoader.cpp',
+]
+
+EXTRA_JS_MODULES += [
+    'ISO8601DateUtils.jsm',
+    'XPCOMUtils.jsm',
+]
+
+FAIL_ON_WARNINGS = True
+
+MSVC_ENABLE_PGO = True
+
+FINAL_LIBRARY = 'xpconnect_s'
+
+DEFINES['JS_THREADSAFE'] = True
+
+LOCAL_INCLUDES += [
+    '../src',
+    '../wrappers',
+    '/content/base/src',
+]
+