1 files changed, 61 insertions, 0 deletions
diff --git a/gcc/gthr-lynx.h b/gcc/gthr-lynx.h
new file mode 100644
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+++ b/gcc/gthr-lynx.h
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+/* Threads compatibility routines for libgcc2 and libobjc for
+   LynxOS.  */
+/* Compile this one with gcc.  */
+/* Copyright (C) 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_LYNX_H
+#define GCC_GTHR_LYNX_H
+
+#ifdef _MULTITHREADED
+
+/* Using the macro version of pthread_setspecific leads to a
+   compilation error.  Instead we have two choices either kill all
+   macros in pthread.h with defining _POSIX_THREADS_CALLS or undefine
+   individual macros where we should fall back on the function
+   implementation.  We choose the second approach.  */
+
+#include <pthread.h>
+#undef pthread_setspecific
+
+/* When using static libc on LynxOS, we cannot define pthread_create
+   weak.  If the multi-threaded application includes iostream.h,
+   gthr-posix.h is included and pthread_create will be defined weak.
+   If pthread_create is weak its defining module in libc is not
+   necessarily included in the link and the symbol is resolved to zero.
+   Therefore the first call to it will crash.
+
+   Since -mthreads is a multilib switch on LynxOS we know that at this
+   point we are compiling for multi-threaded.  Omitting the weak
+   definitions at this point should have no effect.  */
+
+#undef  GTHREAD_USE_WEAK
+#define GTHREAD_USE_WEAK 0
+
+#include "gthr-posix.h"
+
+#else
+#include "gthr-single.h"
+#endif
+
+#endif /* GCC_GTHR_LYNX_H */