--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/config/rs6000/linux.h	Fri Jul 17 14:47:48 2009 +0900
@@ -0,0 +1,130 @@
+/* Definitions of target machine for GNU compiler,
+   for PowerPC machines running Linux.
+   Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
+   2004, 2005, 2006, 2007 Free Software Foundation, Inc.
+   Contributed by Michael Meissner (meissner@cygnus.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/>.  */
+
+#undef MD_EXEC_PREFIX
+#undef MD_STARTFILE_PREFIX
+
+/* Linux doesn't support saving and restoring 64-bit regs in a 32-bit
+   process.  */
+#define OS_MISSING_POWERPC64 1
+
+/* We use glibc _mcount for profiling.  */
+#define NO_PROFILE_COUNTERS 1
+
+/* glibc has float and long double forms of math functions.  */
+#undef  TARGET_C99_FUNCTIONS
+#define TARGET_C99_FUNCTIONS (OPTION_GLIBC)
+
+/* Whether we have sincos that follows the GNU extension.  */
+#undef  TARGET_HAS_SINCOS
+#define TARGET_HAS_SINCOS (OPTION_GLIBC)
+
+#undef  TARGET_OS_CPP_BUILTINS
+#define TARGET_OS_CPP_BUILTINS()		\
+  do						\
+    {						\
+      builtin_define_std ("PPC");		\
+      builtin_define_std ("powerpc");		\
+      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_linux)"
+
+/* The GNU C++ standard library currently requires _GNU_SOURCE being
+   defined on glibc-based systems. This temporary hack accomplishes this,
+   it should go away as soon as libstdc++-v3 has a real fix.  */
+#undef  CPLUSPLUS_CPP_SPEC
+#define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
+
+#undef  LINK_SHLIB_SPEC
+#define LINK_SHLIB_SPEC "%{shared:-shared} %{!shared: %{static:-static}}"
+
+#undef	LIB_DEFAULT_SPEC
+#define LIB_DEFAULT_SPEC "%(lib_linux)"
+
+#undef	STARTFILE_DEFAULT_SPEC
+#define STARTFILE_DEFAULT_SPEC "%(startfile_linux)"
+
+#undef	ENDFILE_DEFAULT_SPEC
+#define ENDFILE_DEFAULT_SPEC "%(endfile_linux)"
+
+#undef	LINK_START_DEFAULT_SPEC
+#define LINK_START_DEFAULT_SPEC "%(link_start_linux)"
+
+#undef	LINK_OS_DEFAULT_SPEC
+#define LINK_OS_DEFAULT_SPEC "%(link_os_linux)"
+
+#define LINK_GCC_C_SEQUENCE_SPEC \
+  "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}"
+
+/* Use --as-needed -lgcc_s for eh support.  */
+#ifdef HAVE_LD_AS_NEEDED
+#define USE_LD_AS_NEEDED 1
+#endif
+
+#undef  TARGET_VERSION
+#define TARGET_VERSION fprintf (stderr, " (PowerPC GNU/Linux)");
+
+/* Override rs6000.h definition.  */
+#undef  ASM_APP_ON
+#define ASM_APP_ON "#APP\n"
+
+/* Override rs6000.h definition.  */
+#undef  ASM_APP_OFF
+#define ASM_APP_OFF "#NO_APP\n"
+
+/* For backward compatibility, we must continue to use the AIX
+   structure return convention.  */
+#undef  DRAFT_V4_STRUCT_RET
+#define DRAFT_V4_STRUCT_RET 1
+
+/* We are 32-bit all the time, so optimize a little.  */
+#undef TARGET_64BIT
+#define TARGET_64BIT 0
+ 
+/* We don't need to generate entries in .fixup, except when
+   -mrelocatable or -mrelocatable-lib is given.  */
+#undef RELOCATABLE_NEEDS_FIXUP
+#define RELOCATABLE_NEEDS_FIXUP \
+  (target_flags & target_flags_explicit & MASK_RELOCATABLE)
+
+#define TARGET_ASM_FILE_END file_end_indicate_exec_stack
+
+#define TARGET_POSIX_IO
+
+#define MD_UNWIND_SUPPORT "config/rs6000/linux-unwind.h"
+
+#ifdef TARGET_LIBC_PROVIDES_SSP
+/* ppc32 glibc provides __stack_chk_guard in -0x7008(2).  */
+#define TARGET_THREAD_SSP_OFFSET	-0x7008
+#endif
+
+#define POWERPC_LINUX
+
+/* ppc linux has 128-bit long double support in glibc 2.4 and later.  */
+#ifdef TARGET_DEFAULT_LONG_DOUBLE_128
+#define RS6000_DEFAULT_LONG_DOUBLE_SIZE 128
+#endif