diff -r 000000000000 -r 6474c204b198 xpcom/build/xrecore.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/xpcom/build/xrecore.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,23 @@
+/* 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 xrecore_h__
+#define xrecore_h__
+
+#include "nscore.h"
+
+/**
+ * Import/export macros for libXUL APIs.
+ */
+#ifdef XPCOM_GLUE
+#define XRE_API(type, name, params) \
+  typedef type (NS_FROZENCALL * name##Type) params; \
+  extern name##Type name NS_HIDDEN;
+#elif defined(IMPL_LIBXUL)
+#define XRE_API(type, name, params) EXPORT_XPCOM_API(type) name params;
+#else
+#define XRE_API(type, name, params) IMPORT_XPCOM_API(type) name params;
+#endif
+
+#endif // xrecore_h__