diff -r 000000000000 -r 6474c204b198 js/src/js-config.h.in
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/js-config.h.in	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,56 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * vim: set ts=8 sw=4 et tw=78:
+ *
+ * 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/. */
+
+#ifndef js_config_h
+#define js_config_h
+
+/* Definitions set at build time that affect SpiderMonkey's public API.
+   This header file is generated by the SpiderMonkey configure script,
+   and installed along with jsapi.h.  */
+
+/* Define to 1 if SpiderMonkey is in debug mode. */
+#undef JS_DEBUG
+
+/* Define to 1 if SpiderMonkey should not use struct types in debug builds. */
+#undef JS_NO_JSVAL_JSID_STRUCT_TYPES
+
+/* Define to 1 if SpiderMonkey should support multi-threaded clients.  */
+#undef JS_THREADSAFE
+
+/* Define to 1 if SpiderMonkey should include ctypes support.  */
+#undef JS_HAS_CTYPES
+
+/* Define to 1 if SpiderMonkey should support the ability to perform
+   entirely too much GC.  */
+#undef JS_GC_ZEAL
+
+/* Define to 1 if SpiderMonkey should use Incremental GC. */
+#undef JSGC_INCREMENTAL
+
+/* Define to 1 if SpiderMonkey should use Generational GC. */
+#undef JSGC_GENERATIONAL
+
+/* Define to 1 if SpiderMonkey should use Exact Rooting. */
+#undef JSGC_USE_EXACT_ROOTING
+
+/* Define to 1 if the <endian.h> header is present and
+   useable.  See jscpucfg.h.  */
+#undef JS_HAVE_ENDIAN_H
+
+/* Define to 1 if the <machine/endian.h> header is present and
+   useable.  See jscpucfg.h.  */
+#undef JS_HAVE_MACHINE_ENDIAN_H
+
+/* Define to 1 if the <sys/isa_defs.h> header is present and
+   useable.  See jscpucfg.h.  */
+#undef JS_HAVE_SYS_ISA_DEFS_H
+
+/* MOZILLA JSAPI version number components */
+#undef MOZJS_MAJOR_VERSION
+#undef MOZJS_MINOR_VERSION
+
+#endif /* js_config_h */