gcc/gcc/config.host

# GCC host-specific configuration file.
# Copyright 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2006, 2007, 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.

#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/>.

# This is the GCC host-specific configuration file
# where a configuration type is mapped to different system-specific
# definitions and files.  This is invoked by the autoconf-generated
# configure script.  Putting it in a separate shell file lets us skip
# running autoconf when modifying host-specific information.

# This file switches on the shell variable ${host}.  As much of this as
# is reasonable should be replaced with autoconf tests in the future.

# This file sets the following shell variables for use by the
# autoconf-generated configure script:
#
#  host_xm_file         List of files to include when compiling for the
#                       host machine.
#
#  host_xm_defines      List of macros to define when compiling for the
#                       host machine.
#
#  host_xmake_file      List of host-specific makefile-fragments.
#
#  host_exeext          Set to the suffix, if the host machine requires
#                       executables to have a file name suffix.
#
#  host_extra_objs      List of extra host-dependent objects that should
#                       be linked into the compiler proper.
#
#  host_extra_gcc_objs  List of extra host-dependent objects that should
#                       be linked into the gcc driver.
#
#  out_host_hook_obj    An object file that provides the host hooks.
#
#  host_can_use_collect2 Set to yes normally; to no if the host cannot
#			link or otherwise use collect2
#  use_long_long_for_widest_fast_int Set this to 'yes' if 'long long'
#			(or '__int64') is wider than 'long' but still
#			efficeiently supported by the host hardware.
#			Only affects compile speed.  Default is 'no'.

# When setting any of these variables, check to see if a corresponding
# variable is present in config.build; if so, you will likely want to 
# set it in both places.

# Default settings.
host_xm_file=
host_xm_defines=
host_xmake_file=
host_exeext=
host_extra_objs=
host_extra_gcc_objs=
out_host_hook_obj=host-default.o
host_can_use_collect2=yes
use_long_long_for_widest_fast_int=no

# Unsupported hosts list.  Generally, only include hosts known to fail here,
# since we allow hosts not listed to be supported generically.
case ${host} in
   i[34567]86-sequent-sysv \
 | i[34567]86-sequent-sysv[123]* \
 | i[34567]86-go32-* \
 | i[34567]86-*-go32* \
 | vax-*-vms*)
    echo "*** Configuration for host ${host} not supported" 1>&2
    exit 1
    ;;
esac

# Common parts for widely ported systems.
case ${host} in
  *-darwin*)
    # Generic darwin host support.
    out_host_hook_obj=host-darwin.o
    host_xmake_file="${host_xmake_file} x-darwin"
    ;;
esac

case ${host} in
  alpha*-*-linux*)
    case ${target} in
      alpha*-*-linux*)
	host_extra_gcc_objs="driver-alpha.o"
	host_xmake_file="${host_xmake_file} alpha/x-alpha"
	;;
    esac
    ;;
  i[34567]86-*-* \
  | x86_64-*-* )
    case ${target} in
      i[34567]86-*-* \
      | x86_64-*-* )
	host_extra_gcc_objs="driver-i386.o"
	host_xmake_file="${host_xmake_file} i386/x-i386"
	;;
    esac
    ;;
  mips*-*-linux*)
    case ${target} in
      mips*-*-linux*)
	host_extra_gcc_objs="driver-native.o"
	host_xmake_file="${host_xmake_file} mips/x-native"
      ;;
    esac
    ;;
  rs6000-*-* \
  | powerpc*-*-* )
    case ${target} in
      rs6000-*-* \
      | powerpc*-*-* )
        host_extra_gcc_objs="driver-rs6000.o"
        host_xmake_file="${host_xmake_file} rs6000/x-rs6000"
        ;;
    esac
    case ${host} in
      *-*-linux* )
	if test "${GCC}:${ac_cv_sizeof_long}" = yes:4; then
	  # On powerpc*-*-linux* use -Wl,--relax to link cc1,
	  # if ld is new enough, otherwise force -O1 in CFLAGS.
	  host_ppc_relax_xmake_file=
	  host_ld_ver=`${CC} -Wl,--version 2>/dev/null | sed 1q`
	  if echo "$host_ld_ver" | grep GNU > /dev/null; then
	    host_ld_date=`echo $host_ld_ver \
			  | sed -n 's,^.*\([2-9][0-9][0-9][0-9]\)[-]*\([01][0-9]\)[-]*\([0-3][0-9]\).*$,\1\2\3,p'`
	    if test 0"$host_ld_date" -gt 20080806; then
	      host_ppc_relax_xmake_file=rs6000/x-linux-relax
	    fi
	  fi
	  if test -z "${host_ppc_relax_xmake_file}"; then
	    host_ppc_relax_xmake_file=x-cflags-O1
	  fi
	  host_xmake_file="${host_xmake_file} ${host_ppc_relax_xmake_file}"
	fi
	;;
    esac
    ;;
esac

# Machine-specific settings.
case ${host} in
  alpha64-dec-*vms*)
    host_xm_file="vms/xm-vms.h vms/xm-vms64.h"
    host_xmake_file=vms/x-vms
    host_exeext=.exe
    host_can_use_collect2=no
    prefix=/gnu
    local_prefix=/gnu/local
    ;;
  alpha*-dec-*vms*)
    host_xm_file="vms/xm-vms.h"
    host_xmake_file=vms/x-vms
    host_exeext=.exe
    host_can_use_collect2=no
    prefix=/gnu
    local_prefix=/gnu/local
    ;;
  hppa1.0-*-hpux10* | hppa1.1-*-hpux10* | hppa2*-*-hpux10*)
    out_host_hook_obj=host-hpux.o
    host_xmake_file="${host_xmake_file} x-hpux"
    ;;
  hppa1.0-*-hpux11* | hppa1.1-*-hpux11* | hppa2*-*-hpux11* | \
  hppa*64*-*-hpux11*)
    out_host_hook_obj=host-hpux.o
    host_xmake_file="${host_xmake_file} x-hpux"
    ;;
  hppa*-*-linux*)
    out_host_hook_obj=host-hpux.o
    host_xmake_file="${host_xmake_file} x-hpux"
    ;;
  i370-*-opened* | i370-*-mvs* ) # IBM 360/370/390 Architecture
    host_xm_defines='FATAL_EXIT_CODE=12'
    ;;
  i[34567]86-*-solaris2*)
    out_host_hook_obj=host-solaris.o
    host_xmake_file="${host_xmake_file} x-solaris"
    ;;
  i[34567]86-pc-msdosdjgpp*)
    host_xm_file=i386/xm-djgpp.h
    host_exeext=.exe
    # Shorten $target_noncanonical for 8.3 filename conventions.
    case ${target} in
      *pc-msdosdjgpp*)
        target_noncanonical=djgpp
        ;;
    esac
    ;;
  i[34567]86-*-pe | i[34567]86-*-cygwin*)
    host_xm_file=i386/xm-cygwin.h
    out_host_hook_obj=host-cygwin.o
    host_xmake_file="${host_xmake_file} i386/x-cygwin"
    host_exeext=.exe
    ;;
  i[34567]86-*-mingw32* | x86_64-*-mingw*)
    host_xm_file=i386/xm-mingw32.h
    host_xmake_file="${host_xmake_file} i386/x-mingw32"
    host_exeext=.exe
    out_host_hook_obj=host-mingw32.o
    ;;
  i[34567]86-*-uwin*)
    echo "*** UWIN may not be used as a host platform because"
    echo "*** linking with posix.dll is not allowed by the GNU GPL."
    exit 1
    ;;
  i[34567]86-*-darwin* | x86_64-*-darwin*)
    out_host_hook_obj="${out_host_hook_obj} host-i386-darwin.o"
    host_xmake_file="${host_xmake_file} i386/x-darwin"
    ;;
  ia64-hp-*vms*)
    host_xm_file="vms/xm-vms.h vms/xm-vms64.h"
    host_xmake_file=vms/x-vms
    host_exeext=.exe
    host_can_use_collect2=no
    prefix=/gnu
    local_prefix=/gnu/local
    ;;
  powerpc-*-beos*)
    host_can_use_collect2=no
    ;;
  powerpc-*-darwin*)
    out_host_hook_obj="${out_host_hook_obj} host-ppc-darwin.o"
    host_xmake_file="${host_xmake_file} rs6000/x-darwin"
    ;;
  powerpc64-*-darwin*)
    out_host_hook_obj="${out_host_hook_obj} host-ppc64-darwin.o"
    host_xmake_file="${host_xmake_file} rs6000/x-darwin64"
    ;;
  rs6000-ibm-aix* | powerpc-ibm-aix*)
    host_xmake_file="${host_xmake_file} rs6000/x-aix"
    ;;
  *-*-solaris2*)
    out_host_hook_obj=host-solaris.o
    host_xmake_file="${host_xmake_file} x-solaris"
    ;;
  *-*-linux*)
    out_host_hook_obj=host-linux.o
    host_xmake_file="${host_xmake_file} x-linux"
    ;;
  ia64-*-hpux*)
    use_long_long_for_widest_fast_int=yes
    out_host_hook_obj=host-hpux.o
    host_xmake_file="${host_xmake_file} x-hpux"
    ;;
esac