--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/config/powerpcspe/option-defaults.h	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,64 @@
+/* Definitions of default options for config/rs6000 configurations.
+   Copyright (C) 1992-2017 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/>.  */
+
+/* This header needs to be included after any other headers affecting
+   TARGET_DEFAULT.  */
+
+#if TARGET_AIX_OS
+#define OPT_64 "maix64"
+#define OPT_32 "maix32"
+#else
+#define OPT_64 "m64"
+#define OPT_32 "m32"
+#endif
+
+#ifndef OPTION_MASK_64BIT
+#define OPTION_MASK_64BIT 0
+#define MASK_64BIT 0
+#endif
+
+#if TARGET_DEFAULT & OPTION_MASK_64BIT
+#define OPT_ARCH64 "!" OPT_32
+#define OPT_ARCH32 OPT_32
+#else
+#define OPT_ARCH64 OPT_64
+#define OPT_ARCH32 "!" OPT_64
+#endif
+
+/* Support for a compile-time default CPU, et cetera.  The rules are:
+   --with-cpu is ignored if -mcpu is specified; likewise --with-cpu-32
+     and --with-cpu-64.
+   --with-tune is ignored if -mtune or -mcpu is specified; likewise
+     --with-tune-32 and --with-tune-64.
+   --with-float is ignored if -mhard-float or -msoft-float are
+     specified.  */
+#define OPTION_DEFAULT_SPECS \
+  {"abi", "%{!mabi=elfv*:-mabi=%(VALUE)}" }, \
+  {"tune", "%{!mtune=*:%{!mcpu=*:-mtune=%(VALUE)}}" }, \
+  {"tune_32", "%{" OPT_ARCH32 ":%{!mtune=*:%{!mcpu=*:-mtune=%(VALUE)}}}" }, \
+  {"tune_64", "%{" OPT_ARCH64 ":%{!mtune=*:%{!mcpu=*:-mtune=%(VALUE)}}}" }, \
+  {"cpu", "%{!mcpu=*:-mcpu=%(VALUE)}" }, \
+  {"cpu_32", "%{" OPT_ARCH32 ":%{!mcpu=*:-mcpu=%(VALUE)}}" }, \
+  {"cpu_64", "%{" OPT_ARCH64 ":%{!mcpu=*:-mcpu=%(VALUE)}}" }, \
+  {"float", "%{!msoft-float:%{!mhard-float:-m%(VALUE)-float}}" }