gcc/config/rs6000/option-defaults.h

/* Definitions of default options for config/rs6000 configurations.
   Copyright (C) 1992-2018 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}}" }