--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/config/rs6000/rtems.h	Fri Jul 17 14:47:48 2009 +0900
@@ -0,0 +1,56 @@
+/* Definitions for rtems targeting a PowerPC using elf.
+   Copyright (C) 1996, 1997, 2000, 2001, 2002, 2003, 2004, 2005, 2007
+   Free Software Foundation, Inc.
+   Contributed by Joel Sherrill (joel@OARcorp.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.
+
+   You should have received a copy of the GNU General Public License
+   along with GCC; see the file COPYING3.  If not see
+   <http://www.gnu.org/licenses/>.  */
+
+/* Specify predefined symbols in preprocessor.  */
+
+#undef TARGET_OS_CPP_BUILTINS
+#define TARGET_OS_CPP_BUILTINS()          \
+  do                                      \
+    {                                     \
+      builtin_define_std ("PPC");         \
+      builtin_define ("__rtems__");       \
+      builtin_define ("__USE_INIT_FINI__"); \
+      builtin_assert ("system=rtems");    \
+      builtin_assert ("cpu=powerpc");     \
+      builtin_assert ("machine=powerpc"); \
+      TARGET_OS_SYSV_CPP_BUILTINS ();     \
+    }                                     \
+  while (0)
+
+#undef CPP_OS_DEFAULT_SPEC
+#define CPP_OS_DEFAULT_SPEC "%(cpp_os_rtems)"
+
+#define CPP_OS_RTEMS_SPEC "\
+%{!mcpu*:  %{!Dppc*: %{!Dmpc*: -Dmpc750} } }\
+%{mcpu=403:  %{!Dppc*: %{!Dmpc*: -Dppc403}  } } \
+%{mcpu=505:  %{!Dppc*: %{!Dmpc*: -Dmpc505}  } } \
+%{mcpu=601:  %{!Dppc*: %{!Dmpc*: -Dppc601}  } } \
+%{mcpu=602:  %{!Dppc*: %{!Dmpc*: -Dppc602}  } } \
+%{mcpu=603:  %{!Dppc*: %{!Dmpc*: -Dppc603}  } } \
+%{mcpu=603e: %{!Dppc*: %{!Dmpc*: -Dppc603e} } } \
+%{mcpu=604:  %{!Dppc*: %{!Dmpc*: -Dmpc604}  } } \
+%{mcpu=750:  %{!Dppc*: %{!Dmpc*: -Dmpc750}  } } \
+%{mcpu=821:  %{!Dppc*: %{!Dmpc*: -Dmpc821}  } } \
+%{mcpu=860:  %{!Dppc*: %{!Dmpc*: -Dmpc860}  } }" 
+
+#undef  SUBSUBTARGET_EXTRA_SPECS
+#define SUBSUBTARGET_EXTRA_SPECS \
+  { "cpp_os_rtems",		CPP_OS_RTEMS_SPEC }