config.gcc

上一个上传的有问题,这个是好的。visopsys包括系统内核和GUI的全部SOURCE code ,还包括一些基本的docs文档。里面src子目录对应所有SOURCE code.对于想研究操作系统的朋

# GCC build-, host- and target-specific configuration file.
# Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 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 2, 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 COPYING.  If not, write to the Free
#Software Foundation, 59 Temple Place - Suite 330, Boston, MA
#02111-1307, USA.

# This is the GCC build-, host- and target-specific configuration file
# where a configuration type, as recognized and generated by config.bfd,
# is mapped to different system-specific definitions and files.  This is
# invoked by the autoconf-generated configure script, called for build,
# host and target in that order, setting ${machine} to each.  Putting it
# in a separate shell file lets us skip running autoconf when modifying
# build-, host- and target-specific information.

# This file switches on the shell variable ${machine}, and also uses the
# following shell variables:
#
#  with_*		Various variables as set by configure.
#
#  enable_threads_flag	Either the name, yes or no depending on whether
#			threads support was requested.
#
#  gas_flag		Either yes or no depending on whether GNU as was
#			requested.
#
#  gnu_ld_flag		Either yes or no depending on whether GNU ld was
#			requested.

# This file sets the following shell variables for use by the
# autoconf-generated configure script:
#
#  cpu_type		The name of the cpu, if different from machine.
#
#  tm_file		A list of target macro files, if different from
#			"$cpu_type/$cpu_type.h". Usually it's constructed
#			per target in a way like this:
#			tm_file="${tm_file} dbxelf.h elfos.h svr4.h ${cpu_type.h}/elf.h"
#			Note that the preferred order is:
#			- specific target header "${cpu_type}/${cpu_type.h}"
#			- generic headers like dbxelf.h elfos.h, netware.h, etc.
#			- specializing target headers like ${cpu_type.h}/elf.h
#			This helps to keep OS specific stuff out of the CPU
#			defining header ${cpu_type}/${cpu_type.h}.
#
#  tm_p_file		Location of file with declarations for functions
#			in $out_file.
#
#  out_file		The name of the machine description C support
#			file, if different from "$cpu_type/$cpu_type.c".
#
#  md_file		The name of the machine-description file, if
#			different from "$cpu_type/$cpu_type.md".
#
#  tmake_file		A list of machine-description-specific
#			makefile-fragments, if different from
#			"$cpu_type/t-$cpu_type".
#
#  float_format		Set to the symbolic name for the floating-point
#			formats used for this machine, if different from
#			"i64".  Used to derive a header file name to
#			include, like "vax" for "float-vax.h".  If no such
#			file is wanted, set to "none".
#
#  extra_objs		List of extra objects that should be linked into
#			the compiler proper (cc1, cc1obj, cc1plus)
#			depending on target.
#
#  extra_headers	List of used header files from the directory
#			config/${cpu_type}.
#
#  host_xmake_file	List of host-specific makefile-fragments.
#
#  extra_passes		List of extra executables compiled for this target
#			machine, used for compiling from source to object.
#
#  extra_parts		List of extra object files that should be compiled
#			for this target machine.
#
#  extra_programs	Like extra_passes, but these are used when linking.
#
#  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.
#
#  c_target_objs	List of extra target-dependent objects that be
#			linked into the C compiler only.
#
#  cxx_target_objs	List of extra target-dependent objects that be
#			linked into the C++ compiler only.
#
#  build_xm_defines	List of macros to define when compiling for the
#			build machine.
#
#  build_xm_file	List of files to include when compiling for the
#			build machine.
#
#  host_xm_defines	List of macros to define when compiling for the
#			host machine.
#
#  host_xm_file		List of files to include when compiling for the
#			host machine.
#
#  xm_defines		List of macros to define when compiling for the
#			target machine.
#
#  xm_file		List of files to include when compiling for the
#			target machine.
#
#  use_collect2		Set to yes or no, depending on whether collect2
#			will be used.
#
#  target_cpu_default	Set to override the default target model.
#
#  build_install_headers_dir
#			Target to use when installing header files.
#
#  host_truncate_target
#			Non-empty if the target name should be truncated
#			on this host, due to filename length issues.
#
#  gdb_needs_out_file_path
#			Set to yes if gdb needs a dir command with
#			`dirname $out_file`.
#
#  build_exeext		Set to the suffix, if the build machine requires
#			executables to have a file name suffix.
#
#  host_exeext		Set to the suffix, if the host machine requires
#			executables to have a file name suffix.
#
#  thread_file		Set to control which thread package to use.
#
#  gas			Set to yes or no depending on whether the target
#			system normally uses GNU as.

# The following variables are used in each case-construct to build up the
# outgoing variables:
#
#  xmake_file		Makefile-fragment when this system is as a host,
#			for host_xmake_file.
#
#  extra_host_objs	List of extra objects that should be linked into
#			the compiler proper when this system is a host,
#			for host_extra_objs.
#
#  install_headers_dir	Makefile-target for how the header file directory
#			is installed, when this system is a build system,
#			for build_install_headers_dir.
#
#  truncate_target	Non-empty if the target name should be truncated
#			when this system is a host, due to filename length
#			issues.  For host_truncate_target.
#
#  exeext		The suffix for executables on this system.
#
#  gnu_ld		Set to yes or no depending on whether the target
#			system normally uses GNU ld.

out_file=
xmake_file=
tmake_file=
extra_headers=
extra_passes=
extra_parts=
extra_programs=
extra_objs=
extra_host_objs=
extra_gcc_objs=
c_target_objs=
cxx_target_objs=
xm_defines=
float_format=
# Set this to force installation and use of collect2.
use_collect2=
# Set this to override the default target model.
target_cpu_default=
# Set this to control how the header file directory is installed.
install_headers_dir=install-headers-tar
# Set this if directory names should be truncated to 14 characters.
truncate_target=
# Set this if gdb needs a dir command with `dirname $out_file`
gdb_needs_out_file_path=
# Set this if the build machine requires executables to have a
# file name suffix.
exeext=
# Set this to control which thread package will be used.
thread_file=
# Reinitialize these from the flag values every loop pass, since some
# configure entries modify them.
gas="$gas_flag"
gnu_ld="$gnu_ld_flag"
enable_threads=$enable_threads_flag

# Obsolete configurations.
# To avoid some tedious lists, we have a blacklist with a whitelist
# embedded within it.
case $machine in
	  1750a-* \
	| a29k-* \
	| alpha*-*-osf[123]* \
	| arm-*-riscix* \
	| c*-convex-* \
	| clipper-* \
	| elxsi-* \
	| i860-* \
	| i?86-*-aix* \
	| i?86-*-bsd* \
	| i?86-*-chorusos* \
	| i?86-*-dgux* \
	| i?86-*-freebsd1.* \
	| i?86-*-isc* \
	| i?86-*-linux*oldld* \
	| i?86-*-osf1* \
	| i?86-*-osfrose* \
	| i?86-*-rtemscoff* \
	| i?86-*-sunos* \
	| i?86-go32-rtems* \
	| i?86-next-* \
	| i?86-sequent-bsd* \
	| i?86-sequent-ptx[12]* \
	| i?86-sequent-sysv3* \
	| m68[k0]*-*-lynxos* \
	| m68[k0]*-*-rtemscoff* \
	| m68[k0]*-*-sysv3* \
	| m68[k0]*-altos-* \
	| m68[k0]*-apollo-* \
	| m68[k0]*-apple-* \
	| m68[k0]*-bull-* \
	| m68[k0]*-convergent-* \
	| m68[k0]*-isi-* \
	| m68[k0]*-next-* \
	| m68[k0]*-sony-* \
	| m88k-* \
	| mips-*-bsd* \
	| mips-*-riscos* \
	| mips-*-sysv* \
	| mips-*-ultrix* \
	| mips-dec-* \
	| mips-sgi-irix[1234]* \
	| mips-sony-* \
	| mips-tandem-* \
	| ns32k-* \
	| pj-* \
	| pjl-* \
	| romp-* \
	| sparc-*-rtemsaout* \
	| we32k-* \
)
  case $machine in
	  mips-sni-sysv4 \
	| m88k-*-aout* | m88k-*-openbsd* | m88k-*-sysv4* \
	| ns32k-*-netbsd* | ns32k-*-openbsd* \
	| romp-*-openbsd* \
   )
    # Whitelisted.
    ;;
  *)
    if test "x$enable_obsolete" != xyes; then
      echo "*** Configuration $machine is obsolete." >&2
      echo "*** Specify --enable-obsolete to build it anyway." >&2
      echo "*** Support will be REMOVED in the next major release of GCC," >&2
      echo "*** unless a maintainer comes forward." >&2
      exit 1
    fi;;
  esac
esac

# Set default cpu_type, tm_file, tm_p_file and xm_file so it can be
# updated in each machine entry.  Also set default extra_headers for some
# machines.
tm_p_file=
cpu_type=`echo $machine | sed 's/-.*$//'`
case $machine in
alpha*-*-*)
	cpu_type=alpha
	;;
strongarm*-*-*)
	cpu_type=arm
	;;
arm*-*-*)
	cpu_type=arm
	;;
xscale-*-*)
	cpu_type=arm
	;;
c*-convex-*)
	cpu_type=convex
	extra_headers=proto.h
	;;
i[34567]86-*-*)
	cpu_type=i386
	extra_headers="mmintrin.h xmmintrin.h"
	;;
x86_64-*-*)
	cpu_type=i386
	extra_headers="mmintrin.h xmmintrin.h"
	;;
ia64-*-*)
	extra_headers=ia64intrin.h
	;;
hppa*-*-* | parisc*-*-*)
	cpu_type=pa
	;;
m680[012]0-*-*)
	cpu_type=m68k
	extra_headers=math-68881.h
	;;
m68k-*-*)
	extra_headers=math-68881.h
	;;
mips*-*-*)
	cpu_type=mips
	;;
pj*-*-*)
	cpu_type=pj
	;;
powerpc*-*-*)
	cpu_type=rs6000
	extra_headers="ppc-asm.h altivec.h"
	;;
sparc*-*-*)
	cpu_type=sparc
	;;
sh64-*-*)
	cpu_type=sh
	;;
esac

tm_file=${cpu_type}/${cpu_type}.h
if test -f ${srcdir}/config/${cpu_type}/${cpu_type}-protos.h
then
	tm_p_file=${cpu_type}/${cpu_type}-protos.h
fi

case $machine in
x86_64-*-*)
	tm_file="i386/biarch64.h ${tm_file}"
	;;
esac

# On a.out targets, we need to use collect2.
case $machine in
*-*-*aout*)
	use_collect2=yes
	;;
esac

# Common parts for GNU/Linux, GNU/Hurd, OpenBSD, NetBSD, and FreeBSD systems.
case $machine in
*-*-linux*)
	xm_defines=POSIX
	case $machine in
	*-*-linux*ecoff* | *-*-linux*libc1* | *-*-linux*oldld* | *-*-linux*aout*)
		;;
	*)
		case x${enable_threads} in
			x | xyes | xposix) thread_file='posix'
			;;
		esac
		;;
	esac
	;;
*-*-gnu*)
	# On the Hurd, the setup is just about the same on
	# each different CPU.  The specific machines that we
	# support are matched above and just set $cpu_type.
	xm_defines=POSIX
	tm_file="${cpu_type}/gnu.h"
	extra_parts="crtbegin.o crtend.o crtbeginS.o crtendS.o crtbeginT.o"
	# GNU always uses ELF.
	elf=yes
	# GNU tools are the only tools.
	gnu_ld=yes
	gas=yes
	# These details are the same as for Linux.
	# But here we need a little extra magic.
	tmake_file="t-slibgcc-elf-ver t-linux t-gnu"
	case $machine in
	i[34567]86-*-*)
		tm_file="${cpu_type}/${cpu_type}.h i386/att.h dbxelf.h elfos.h svr4.h linux.h i386/linux.h gnu.h ${tm_file}"
		;;
	esac
	;;
*-*-openbsd*)
	tm_file=${cpu_type}/openbsd.h
	tmake_file="t-libc-ok t-openbsd t-libgcc-pic"
	xm_defines=POSIX
	if test x$enable_threads = xyes; then
		thread_file='posix'
		tmake_file="${tmake_file} t-openbsd-thread"
	fi
	;;
*-*-netbsd*)
	tmake_file="t-slibgcc-elf-ver t-libc-ok t-netbsd"
	xm_defines=POSIX
	gas=yes
	gnu_ld=yes
	;;
*-*-freebsd[12] | *-*-freebsd[12].* | *-*-freebsd*aout*)
	# This is the place-holder for the generic a.out configuration
	# of FreeBSD.  No actual configuration resides here since
	# there was only ever a bare-bones ix86 configuration for
	# a.out and it exists solely in the machine-specific section.
	# This place-holder must exist to avoid dropping into
	# the generic ELF configuration of FreeBSD (i.e. it must be
	# ordered before that section).
	;;
*-*-freebsd*)
	# This is the generic ELF configuration of FreeBSD.  Later
	# machine-specific sections may refine and add to this
	# configuration.
	#
	# Due to tm_file entry ordering issues that vary between cpu
	# architectures, we only define fbsd_tm_file to allow the
	# machine-specific section to dictate the final order of all
	# entries of tm_file with the minor exception that components
	# of the tm_file set here will always be of the form:
	#
	# freebsd<version_number>.h [freebsd-<conf_option>.h ...] freebsd-spec.h freebsd.h
	#
	# The machine-specific section should not tamper with this
	# ordering but may order all other entries of tm_file as it
	# pleases around the provided core setting.
	gas=yes
	gnu_ld=yes
	extra_parts="crtbegin.o crtend.o crtbeginS.o crtendS.o"
	case $machine in
	*-*-freebsd3 | *-*-freebsd[3].*) fbsd_tm_file="freebsd3.h";;
	*-*-freebsd4 | *-*-freebsd[4].*) fbsd_tm_file="freebsd4.h";;
	*-*-freebsd5 | *-*-freebsd[5].*) fbsd_tm_file="freebsd5.h";;
	*-*-freebsd6 | *-*-freebsd[6].*) fbsd_tm_file="freebsd6.h";;
	*) echo 'Please update *-*-freebsd* in gcc/config.gcc'; exit 1;;
	esac
	tmake_file="t-slibgcc-elf-ver t-freebsd"
	xmake_file=none
	xm_defines=POSIX
	case x${enable_threads} in
	xno) fbsd_tm_file="${fbsd_tm_file} freebsd-nthr.h";;
	x | xyes | xpthreads | xposix)
		thread_file='posix'
		tmake_file="${tmake_file} t-freebsd-thread"
		# Before 5.0, FreeBSD can't bind shared libraries to -lc
		# when "optionally" threaded via weak pthread_* checks.
		case $machine in
		*-*-freebsd[34] | *-*-freebsd[34].*)
			tmake_file="${tmake_file} t-slibgcc-nolc-override";;
		esac
		;;
	*) echo 'Unknown thread configuration for FreeBSD'; exit 1;;
	esac
	fbsd_tm_file="${fbsd_tm_file} freebsd-spec.h freebsd.h"
	;;
esac

case $machine in
# Support site-specific machine types.
*local*)
	rest=`echo $machine | sed -e "s/$cpu_type-//"`
	tm_file=${cpu_type}/$rest.h
	if test -f $srcdir/config/${cpu_type}/xm-$rest.h
	then xm_file=${cpu_type}/xm-$rest.h
	fi
	if test -f $srcdir/config/${cpu_type}/x-$rest
	then xmake_file=${cpu_type}/x-$rest
	fi
	if test -f $srcdir/config/${cpu_type}/t-$rest
	then tmake_file=${cpu_type}/t-$rest
	fi
	;;
1750a-*-*)
	# 1750a is only supported as a target.
	case "$build,$host" in 1750a*,* | *,1750a* )
		echo "*** $machine is only supported as a target" >&2
		exit 1
	esac
	;;
a29k-*-bsd* | a29k-*-sym1*)
	tm_file="${tm_file} a29k/unix.h"
	xm_defines=POSIX
	use_collect2=yes
	;;
a29k-*-udi | a29k-*-coff)
	tm_file="${tm_file} dbxcoff.h"
	tmake_file=a29k/t-a29kbare
	;;
a29k*-*-rtems*)
	xm_defines=POSIX
	tm_file="a29k/a29k.h a29k/rtems.h rtems.h"
	tmake_file="a29k/t-a29kbare t-rtems"
	if test x$enable_threads = xyes; then
	  thread_file='rtems'
	fi
	;;
a29k-wrs-vxworks*)
	tm_file="${tm_file} dbxcoff.h a29k/vx29k.h"
	tmake_file=a29k/t-vx29k
	extra_parts="crtbegin.o crtend.o"