--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/gthr-gnat.h	Fri Jul 17 14:47:48 2009 +0900
@@ -0,0 +1,48 @@
+/* Threads compatibility routines for libgcc2.  */
+/* Compile this one with gcc.  */
+/* Copyright (C) 2003, 2004, 2008, 2009 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+<http://www.gnu.org/licenses/>.  */
+
+#ifndef GCC_GTHR_GNAT_H
+#define GCC_GTHR_GNAT_H
+
+#ifndef HIDE_EXPORTS
+#pragma GCC visibility push(default)
+#endif
+
+/* Just provide compatibility for mutex handling.  */
+
+typedef int __gthread_mutex_t;
+
+#define __GTHREAD_MUTEX_INIT 0
+
+extern void __gnat_install_locks (void (*) (void), void (*) (void));
+extern int __gthread_active_p (void);
+extern int __gthread_mutex_lock (__gthread_mutex_t *);
+extern int __gthread_mutex_unlock (__gthread_mutex_t *);
+
+#ifndef HIDE_EXPORTS
+#pragma GCC visibility pop
+#endif
+
+#endif /* ! GCC_GTHR_GNAT_H */
+