obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
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1 files changed, 230 insertions, 0 deletions

diff --git a/gcc/gthr-mipssde.h b/gcc/gthr-mipssde.h
new file mode 100644
index 000000000..34f9b6cf5
--- /dev/null
+++ b/gcc/gthr-mipssde.h
@@ -0,0 +1,230 @@
+/* MIPS SDE threads compatibility routines for libgcc2 and libobjc.  */
+/* Compile this one with gcc.  */
+/* Copyright (C) 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
+   Contributed by Nigel Stephens <nigel@mips.com>
+
+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_MIPSSDE_H
+#define GCC_GTHR_MIPSSDE_H
+
+/* MIPS SDE threading API specific definitions.
+   Easy, since the interface is pretty much one-to-one.  */
+
+#define __GTHREADS 1
+
+#include <sdethread.h>
+#include <unistd.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef __sdethread_key_t __gthread_key_t;
+typedef __sdethread_once_t __gthread_once_t;
+typedef __sdethread_mutex_t __gthread_mutex_t;
+
+typedef struct {
+  long depth;
+  __sdethread_t owner;
+  __sdethread_mutex_t actual;
+} __gthread_recursive_mutex_t;
+
+#define __GTHREAD_MUTEX_INIT __SDETHREAD_MUTEX_INITIALIZER("gthr")
+#define __GTHREAD_ONCE_INIT __SDETHREAD_ONCE_INIT
+static inline int
+__gthread_recursive_mutex_init_function(__gthread_recursive_mutex_t *__mutex);
+#define __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION __gthread_recursive_mutex_init_function
+
+#if SUPPORTS_WEAK && GTHREAD_USE_WEAK
+# define __gthrw(name) \
+  static __typeof(name) __gthrw_ ## name __attribute__ ((__weakref__(#name)));
+# define __gthrw_(name) __gthrw_ ## name
+#else
+# define __gthrw(name)
+# define __gthrw_(name) name
+#endif
+
+__gthrw(__sdethread_once)
+__gthrw(__sdethread_key_create)
+__gthrw(__sdethread_key_delete)
+__gthrw(__sdethread_getspecific)
+__gthrw(__sdethread_setspecific)
+
+__gthrw(__sdethread_self)
+
+__gthrw(__sdethread_mutex_lock)
+__gthrw(__sdethread_mutex_trylock)
+__gthrw(__sdethread_mutex_unlock)
+
+__gthrw(__sdethread_mutex_init)
+
+__gthrw(__sdethread_threading)
+
+#if SUPPORTS_WEAK && GTHREAD_USE_WEAK
+
+static inline int
+__gthread_active_p (void)
+{
+  return !!(void *)&__sdethread_threading;
+}
+
+#else /* not SUPPORTS_WEAK */
+
+static inline int
+__gthread_active_p (void)
+{
+  return 1;
+}
+
+#endif /* SUPPORTS_WEAK */
+
+static inline int
+__gthread_once (__gthread_once_t *__once, void (*__func) (void))
+{
+  if (__gthread_active_p ())
+    return __gthrw_(__sdethread_once) (__once, __func);
+  else
+    return -1;
+}
+
+static inline int
+__gthread_key_create (__gthread_key_t *__key, void (*__dtor) (void *))
+{
+  return __gthrw_(__sdethread_key_create) (__key, __dtor);
+}
+
+static inline int
+__gthread_key_delete (__gthread_key_t __key)
+{
+  return __gthrw_(__sdethread_key_delete) (__key);
+}
+
+static inline void *
+__gthread_getspecific (__gthread_key_t __key)
+{
+  return __gthrw_(__sdethread_getspecific) (__key);
+}
+
+static inline int
+__gthread_setspecific (__gthread_key_t __key, const void *__ptr)
+{
+  return __gthrw_(__sdethread_setspecific) (__key, __ptr);
+}
+
+static inline int
+__gthread_mutex_destroy (__gthread_mutex_t * UNUSED(__mutex))
+{
+  return 0;
+}
+
+static inline int
+__gthread_mutex_lock (__gthread_mutex_t *__mutex)
+{
+  if (__gthread_active_p ())
+    return __gthrw_(__sdethread_mutex_lock) (__mutex);
+  else
+    return 0;
+}
+
+static inline int
+__gthread_mutex_trylock (__gthread_mutex_t *__mutex)
+{
+  if (__gthread_active_p ())
+    return __gthrw_(__sdethread_mutex_trylock) (__mutex);
+  else
+    return 0;
+}
+
+static inline int
+__gthread_mutex_unlock (__gthread_mutex_t *__mutex)
+{
+  if (__gthread_active_p ())
+    return __gthrw_(__sdethread_mutex_unlock) (__mutex);
+  else
+    return 0;
+}
+
+static inline int
+__gthread_recursive_mutex_init_function (__gthread_recursive_mutex_t *__mutex)
+{
+  __mutex->depth = 0;
+  __mutex->owner = __gthrw_(__sdethread_self) ();
+  return __gthrw_(__sdethread_mutex_init) (&__mutex->actual, NULL);
+}
+
+static inline int
+__gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *__mutex)
+{
+  if (__gthread_active_p ())
+    {
+      __sdethread_t __me = __gthrw_(__sdethread_self) ();
+
+      if (__mutex->owner != __me)
+	{
+	  __gthrw_(__sdethread_mutex_lock) (&__mutex->actual);
+	  __mutex->owner = __me;
+	}
+
+      __mutex->depth++;
+    }
+  return 0;
+}
+
+static inline int
+__gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *__mutex)
+{
+  if (__gthread_active_p ())
+    {
+      __sdethread_t __me = __gthrw_(__sdethread_self) ();
+
+      if (__mutex->owner != __me)
+	{
+	  if (__gthrw_(__sdethread_mutex_trylock) (&__mutex->actual))
+	    return 1;
+	  __mutex->owner = __me;
+	}
+
+      __mutex->depth++;
+    }
+  return 0;
+}
+
+static inline int
+__gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *__mutex)
+{
+  if (__gthread_active_p ())
+    {
+      if (--__mutex->depth == 0)
+	{
+	   __mutex->owner = (__sdethread_t) 0;
+	   __gthrw_(__sdethread_mutex_unlock) (&__mutex->actual);
+	}
+    }
+  return 0;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* ! GCC_GTHR_MIPSSDE_H */