[gcc.git] / gcc / configure.in

# configure.in for GNU CC
# Process this file with autoconf to generate a configuration script.

# Copyright (C) 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.

#This file is part of GNU CC.

#GNU CC 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.

#GNU CC 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 GNU CC; see the file COPYING.  If not, write to
#the Free Software Foundation, 59 Temple Place - Suite 330,
#Boston, MA 02111-1307, USA.

# Initialization and defaults
AC_PREREQ(2.13)
AC_INIT(tree.c)
AC_CONFIG_HEADER(auto-host.h:config.in)

remove=rm
hard_link=ln
symbolic_link='ln -s'
copy=cp

# Check for bogus environment variables.
# Test if LIBRARY_PATH contains the notation for the current directory
# since this would lead to problems installing/building glibc.
# LIBRARY_PATH contains the current directory if one of the following
# is true:
# - one of the terminals (":" and ";") is the first or last sign
# - two terminals occur directly after each other
# - the path contains an element with a dot in it
AC_MSG_CHECKING(LIBRARY_PATH variable)
changequote(,)dnl
case ${LIBRARY_PATH} in
  [:\;]* | *[:\;] | *[:\;][:\;]* |  *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
    library_path_setting="contains current directory"
    ;;
  *)
    library_path_setting="ok"
    ;;
esac
changequote([,])dnl
AC_MSG_RESULT($library_path_setting)
if test "$library_path_setting" != "ok"; then
AC_MSG_ERROR([
*** LIBRARY_PATH shouldn't contain the current directory when
*** building gcc. Please change the environment variable
*** and run configure again.])
fi

# Test if GCC_EXEC_PREFIX contains the notation for the current directory
# since this would lead to problems installing/building glibc.
# GCC_EXEC_PREFIX contains the current directory if one of the following
# is true:
# - one of the terminals (":" and ";") is the first or last sign
# - two terminals occur directly after each other
# - the path contains an element with a dot in it
AC_MSG_CHECKING(GCC_EXEC_PREFIX variable)
changequote(,)dnl
case ${GCC_EXEC_PREFIX} in
  [:\;]* | *[:\;] | *[:\;][:\;]* |  *[:\;]. | .[:\;]*| . | *[:\;].[:\;]* )
    gcc_exec_prefix_setting="contains current directory"
    ;;
  *)
    gcc_exec_prefix_setting="ok"
    ;;
esac
changequote([,])dnl
AC_MSG_RESULT($gcc_exec_prefix_setting)
if test "$gcc_exec_prefix_setting" != "ok"; then
AC_MSG_ERROR([
*** GCC_EXEC_PREFIX shouldn't contain the current directory when
*** building gcc. Please change the environment variable
*** and run configure again.])
fi

# Check for additional parameters

# With GNU ld
AC_ARG_WITH(gnu-ld,
[  --with-gnu-ld           arrange to work with GNU ld.],
gnu_ld_flag="$with_gnu_ld",
gnu_ld_flag=no)

# With pre-defined ld
AC_ARG_WITH(ld,
[  --with-ld               arrange to use the specified ld (full pathname).],
DEFAULT_LINKER="$with_ld")
if test x"${DEFAULT_LINKER+set}" = x"set"; then
  if test ! -x "$DEFAULT_LINKER"; then
    AC_MSG_WARN([cannot execute: $DEFAULT_LINKER: check --with-ld or env. var. DEFAULT_LINKER])
  elif $DEFAULT_LINKER -v < /dev/null 2>&1 | grep GNU > /dev/null; then
    gnu_ld_flag=yes
  fi
  AC_DEFINE_UNQUOTED(DEFAULT_LINKER,"$DEFAULT_LINKER",
	[Define to enable the use of a default linker.])
fi

# With GNU as
AC_ARG_WITH(gnu-as,
[  --with-gnu-as           arrange to work with GNU as.],
gas_flag="$with_gnu_as",
gas_flag=no)

AC_ARG_WITH(as,
[  --with-as               arrange to use the specified as (full pathname).],
DEFAULT_ASSEMBLER="$with_as")
if test x"${DEFAULT_ASSEMBLER+set}" = x"set"; then
  if test ! -x "$DEFAULT_ASSEMBLER"; then
    AC_MSG_WARN([cannot execute: $DEFAULT_ASSEMBLER: check --with-as or env. var. DEFAULT_ASSEMBLER])
  elif $DEFAULT_ASSEMBLER -v < /dev/null 2>&1 | grep GNU > /dev/null; then
    gas_flag=yes
  fi
  AC_DEFINE_UNQUOTED(DEFAULT_ASSEMBLER,"$DEFAULT_ASSEMBLER",
	[Define to enable the use of a default assembler.])
fi

# With stabs
AC_ARG_WITH(stabs,
[  --with-stabs            arrange to use stabs instead of host debug format.],
stabs="$with_stabs",
stabs=no)

# With ELF
AC_ARG_WITH(elf,
[  --with-elf              arrange to use ELF instead of host debug format.],
elf="$with_elf",
elf=no)

# Specify the local prefix
local_prefix=
AC_ARG_WITH(local-prefix,
[  --with-local-prefix=DIR specifies directory to put local include.],
[case "${withval}" in
yes)	AC_MSG_ERROR(bad value ${withval} given for local include directory prefix) ;;
no)	;;
*)	local_prefix=$with_local_prefix ;;
esac])

# Default local prefix if it is empty
if test x$local_prefix = x; then
	local_prefix=/usr/local
fi

# Build a new-libstdc++ system (ie libstdc++-v3)
AC_MSG_CHECKING([for libstdc++ to install])
AC_ARG_ENABLE(libstdcxx-v3,
[  --enable-libstdcxx-v3 
			  enable libstdc++-v3 for building and installation],
  [enable_libstdcxx_v3="$enableval"], [enable_libstdcxx_v3=yes])

if test x$enable_libstdcxx_v3 = xyes; then
  AC_MSG_RESULT(v3)
  HAVE_LIBSTDCXX_V3=1
  ac_esn=1
else
  AC_MSG_RESULT(v2)
  HAVE_LIBSTDCXX_V3=0
  ac_esn=0
fi

# Don't set gcc_gxx_include_dir to gxx_include_dir since that's only
# passed in by the toplevel make and thus we'd get different behavior
# depending on where we built the sources.
gcc_gxx_include_dir=
# Specify the g++ header file directory
AC_ARG_WITH(gxx-include-dir,
[  --with-gxx-include-dir=DIR
                          specifies directory to put g++ header files.],
[case "${withval}" in
yes)	AC_MSG_ERROR(bad value ${withval} given for g++ include directory) ;;
no)	;;
*)	gcc_gxx_include_dir=$with_gxx_include_dir ;;
esac])

if test x${gcc_gxx_include_dir} = x; then
  if test x${enable_version_specific_runtime_libs} = xyes; then
    gcc_gxx_include_dir='${libsubdir}/include/g++'
  else
    topsrcdir=${srcdir}/.. . ${srcdir}/../config.if
changequote(<<, >>)dnl
    gcc_gxx_include_dir="\$(libsubdir)/\$(unlibsubdir)/..\`echo \$(exec_prefix) | sed -e 's|^\$(prefix)||' -e 's|/[^/]*|/..|g'\`/include/"${libstdcxx_incdir}
changequote([, ])dnl
  fi
fi

# Enable expensive internal checks
AC_ARG_ENABLE(checking,
[  --enable-checking[=LIST]
			  enable expensive run-time checks.  With LIST,
			  enable only specific categories of checks.
			  Categories are: misc,tree,rtl,gc,gcac; default
			  is misc,tree,gc],
[ac_checking=
ac_tree_checking=
ac_rtl_checking=
ac_gc_checking=
ac_gc_always_collect=
case "${enableval}" in
yes)	ac_checking=1 ; ac_tree_checking=1 ; ac_gc_checking=1 ;;
no)	;;
*)	IFS="${IFS= 	}"; ac_save_IFS="$IFS"; IFS="$IFS,"
	set fnord $enableval; shift
	IFS="$ac_save_IFS"
	for check
	do
		case $check in
		misc)	ac_checking=1 ;;
		tree)	ac_tree_checking=1 ;;
		rtl)	ac_rtl_checking=1 ;;
		gc)	ac_gc_checking=1 ;;
		gcac)	ac_gc_always_collect=1 ;;
		*)	AC_MSG_ERROR(unknown check category $check) ;;
		esac
	done
	;;
esac
], 
# Enable some checks by default for development versions of GCC
[ac_checking=1; ac_tree_checking=1; ac_gc_checking=1;])
if test x$ac_checking != x ; then
  AC_DEFINE(ENABLE_CHECKING, 1,
[Define if you want more run-time sanity checks.  This one gets a grab
   bag of miscellaneous but relatively cheap checks.])
fi
if test x$ac_tree_checking != x ; then
  AC_DEFINE(ENABLE_TREE_CHECKING, 1,
[Define if you want all operations on trees (the basic data
   structure of the front ends) to be checked for dynamic type safety
   at runtime.  This is moderately expensive.])
fi
if test x$ac_rtl_checking != x ; then
  AC_DEFINE(ENABLE_RTL_CHECKING, 1,
[Define if you want all operations on RTL (the basic data structure
   of the optimizer and back end) to be checked for dynamic type safety
   at runtime.  This is quite expensive.])
fi
if test x$ac_gc_checking != x ; then
  AC_DEFINE(ENABLE_GC_CHECKING, 1,
[Define if you want the garbage collector to do object poisoning and
   other memory allocation checks.  This is quite expensive.])
fi
if test x$ac_gc_always_collect != x ; then
  AC_DEFINE(ENABLE_GC_ALWAYS_COLLECT, 1,
[Define if you want the garbage collector to operate in maximally
   paranoid mode, validating the entire heap and collecting garbage at
   every opportunity.  This is extremely expensive.])
fi


AC_ARG_ENABLE(cpp,
[  --disable-cpp           don't provide a user-visible C preprocessor.],
[], [enable_cpp=yes])

AC_ARG_WITH(cpp_install_dir,
[  --with-cpp-install-dir=DIR
                          install the user visible C preprocessor in DIR
                          (relative to PREFIX) as well as PREFIX/bin.],
[if test x$withval = xyes; then
  AC_MSG_ERROR([option --with-cpp-install-dir requires an argument])
elif test x$withval != xno; then
  cpp_install_dir=$withval
fi])

# Enable Multibyte Characters for C/C++
AC_ARG_ENABLE(c-mbchar,
[  --enable-c-mbchar       Enable multibyte characters for C and C++.],
if test x$enable_c_mbchar != xno; then
  AC_DEFINE(MULTIBYTE_CHARS, 1,
  [Define if you want the C and C++ compilers to support multibyte
   character sets for source code.])
fi)
  
# Enable threads
# Pass with no value to take the default
# Pass with a value to specify a thread package
AC_ARG_ENABLE(threads,
[  --enable-threads        enable thread usage for target GCC.
  --enable-threads=LIB    use LIB thread package for target GCC.],,
enable_threads='')

enable_threads_flag=$enable_threads
# Check if a valid thread package
case x${enable_threads_flag} in
	x | xno)
		# No threads
		target_thread_file='single'
		;;
	xyes)
		# default
		target_thread_file=''
		;;
	xdecosf1 | xirix | xmach | xos2 | xposix | xpthreads | xsingle | \
	xsolaris | xwin32 | xdce | xvxworks | xaix)
		target_thread_file=$enable_threads_flag
		;;
	*)
		echo "$enable_threads is an unknown thread package" 1>&2
		exit 1
		;;
esac

AC_ARG_ENABLE(objc-gc,
[  --enable-objc-gc	  enable the use of Boehm's garbage collector with
			  the GNU Objective-C runtime.],
if test x$enable_objc_gc = xno; then
	objc_boehm_gc=''
else
	objc_boehm_gc=1
fi,
objc_boehm_gc='')

AC_ARG_WITH(dwarf2,
[  --with-dwarf2	  force the default debug format to be DWARF2.],
dwarf2="$with_dwarf2",
dwarf2=no)

AC_ARG_ENABLE(shared,
[  --disable-shared       don't provide a shared libgcc.],
[], [enable_shared=yes])
AC_SUBST(enable_shared)

# Determine the host, build, and target systems
AC_CANONICAL_SYSTEM

# Find the native compiler
AC_PROG_CC
AC_PROG_CC_C_O
# autoconf is lame and doesn't give us any substitution variable for this.
if eval "test \"`echo '$ac_cv_prog_cc_'${ac_cc}_c_o`\" = no"; then
  NO_MINUS_C_MINUS_O=yes
else
  OUTPUT_OPTION='-o $@'
fi
AC_SUBST(NO_MINUS_C_MINUS_O)
AC_SUBST(OUTPUT_OPTION)

gcc_AC_C_LONG_DOUBLE

AC_CACHE_CHECK(whether ${CC-cc} accepts -Wno-long-long,
ac_cv_prog_cc_no_long_long,
[save_CFLAGS="$CFLAGS"
CFLAGS="-Wno-long-long"
AC_TRY_COMPILE(,,ac_cv_prog_cc_no_long_long=yes,
	       ac_cv_prog_cc_no_long_long=no)
CFLAGS="$save_CFLAGS"])
strict1_warn=
if test $ac_cv_prog_cc_no_long_long = yes; then
  strict1_warn="-pedantic -Wno-long-long"
fi
AC_SUBST(strict1_warn)

# If the native compiler is GCC, we can enable warnings even in stage1.  
# That's useful for people building cross-compilers, or just running a
# quick `make'.
warn_cflags=
if test "x$GCC" = "xyes"; then
  warn_cflags='$(GCC_WARN_CFLAGS)'
fi
AC_SUBST(warn_cflags)

# Stage specific cflags for build.
stage1_cflags=
case $build in
vax-*-*)
  if test x$GCC = xyes
  then
    stage1_cflags="-Wa,-J"
  else
    stage1_cflags="-J"
  fi
  ;;
esac
AC_SUBST(stage1_cflags)

AC_PROG_MAKE_SET

AC_MSG_CHECKING([whether a default assembler was specified])
if test x"${DEFAULT_ASSEMBLER+set}" = x"set"; then
    if test x"$gas_flag" = x"no"; then
    	AC_MSG_RESULT([yes ($DEFAULT_ASSEMBLER)])
    else
	AC_MSG_RESULT([yes ($DEFAULT_ASSEMBLER - GNU as)])
    fi
else
    AC_MSG_RESULT(no)
fi

AC_MSG_CHECKING([whether a default linker was specified])
if test x"${DEFAULT_LINKER+set}" = x"set"; then
    if test x"$gnu_ld_flag" = x"no"; then
	AC_MSG_RESULT([yes ($DEFAULT_LINKER)])
    else
	AC_MSG_RESULT([yes ($DEFAULT_LINKER - GNU ld)])
    fi
else
    AC_MSG_RESULT(no)
fi

AC_MSG_CHECKING(for GNU C library)
AC_CACHE_VAL(gcc_cv_glibc,
[AC_TRY_COMPILE(
  [#include <features.h>],[
#if ! (defined __GLIBC__ || defined __GNU_LIBRARY__)
#error Not a GNU C library system
#endif], 
  [gcc_cv_glibc=yes], 
  gcc_cv_glibc=no)])
AC_MSG_RESULT($gcc_cv_glibc)
if test $gcc_cv_glibc = yes; then
  AC_DEFINE(_GNU_SOURCE, 1, [Always define this when using the GNU C Library])
fi

AC_C_INLINE

# Find some useful tools
AC_PROG_AWK
gcc_AC_PROG_LN
gcc_AC_PROG_LN_S
gcc_AC_C_VOLATILE
AC_PROG_RANLIB
gcc_AC_PROG_INSTALL

AC_HEADER_STDC
AC_HEADER_TIME
gcc_AC_HEADER_STRING
AC_HEADER_SYS_WAIT
AC_CHECK_HEADERS(limits.h stddef.h string.h strings.h stdlib.h time.h \
		 fcntl.h unistd.h stab.h sys/file.h sys/time.h \
		 sys/resource.h sys/param.h sys/times.h sys/stat.h \
		 direct.h malloc.h langinfo.h iconv.h)

# Check for thread headers.
AC_CHECK_HEADER(thread.h, [have_thread_h=yes], [have_thread_h=])
AC_CHECK_HEADER(pthread.h, [have_pthread_h=yes], [have_pthread_h=])

# See if GNAT has been installed
AC_CHECK_PROG(gnat, gnatbind, yes, no)

# See if we have the mktemp command.
AC_CHECK_PROG(have_mktemp_command, mktemp, yes, no)

# Do we have a single-tree copy of texinfo?
if test -f $srcdir/../texinfo/Makefile.in; then
  MAKEINFO='$(objdir)/../texinfo/makeinfo/makeinfo'
  gcc_cv_prog_makeinfo_modern=yes
  AC_MSG_RESULT([Using makeinfo from the unified source tree.])
else
  # See if makeinfo has been installed and is modern enough
  # that we can use it.
  gcc_AC_CHECK_PROG_VER(MAKEINFO, makeinfo, --version,
  [GNU texinfo.* \([0-9][0-9.]*\)],
  [4.*])
fi

if test $gcc_cv_prog_makeinfo_modern = no; then
  AC_MSG_WARN([
*** Makeinfo is missing or too old.
*** Info documentation will not be built.])
  BUILD_INFO=
else
  BUILD_INFO=info		AC_SUBST(BUILD_INFO)
fi

# Is pod2man recent enough to regenerate manpages?
AC_MSG_CHECKING([for recent Pod::Man])
if perl -e 'use 1.10 Pod::Man' >/dev/null 2>&1; then
  AC_MSG_RESULT(yes)
  GENERATED_MANPAGES=generated-manpages		AC_SUBST(GENERATED_MANPAGES)
else
  AC_MSG_RESULT(no)
  GENERATED_MANPAGES=
fi

# How about lex?
dnl Don't use AC_PROG_LEX; we insist on flex.
dnl LEXLIB is not useful in gcc.
if test -f $srcdir/../flex/skel.c; then
  FLEX='$(objdir)/../flex/flex'
else
  AC_CHECK_PROG(FLEX, flex, flex, false)
fi

# Bison?
# The -L switch is so bison can find its skeleton file.
if test -f $srcdir/../bison/bison.simple; then
  BISON='$(objdir)/../bison/bison -L $(srcdir)/../bison/'
else
  AC_CHECK_PROG(BISON, bison, bison, false)
fi

# See if the stage1 system preprocessor understands the ANSI C
# preprocessor stringification operator.
AC_C_STRINGIZE

# Use <inttypes.h> only if it exists,
# doesn't clash with <sys/types.h>, and declares intmax_t.
AC_MSG_CHECKING(for inttypes.h)
AC_CACHE_VAL(gcc_cv_header_inttypes_h,
[AC_TRY_COMPILE(
  [#include <sys/types.h>
#include <inttypes.h>],
  [intmax_t i = -1;],
  [gcc_cv_header_inttypes_h=yes],
  gcc_cv_header_inttypes_h=no)])
AC_MSG_RESULT($gcc_cv_header_inttypes_h)
if test $gcc_cv_header_inttypes_h = yes; then
  AC_DEFINE(HAVE_INTTYPES_H, 1,
	[Define if you have a working <inttypes.h> header file.])
fi

#
# Determine if enumerated bitfields are unsigned.   ISO C says they can 
# be either signed or unsigned.
#
AC_CACHE_CHECK(for unsigned enumerated bitfields, gcc_cv_enum_bf_unsigned,
[AC_TRY_RUN(#include <stdlib.h>
enum t { BLAH = 128 } ;
struct s_t { enum t member : 8; } s ;
int main(void)
{            
        s.member = BLAH;
        if (s.member < 0) exit(1);
        exit(0);

}, gcc_cv_enum_bf_unsigned=yes, gcc_cv_enum_bf_unsigned=no, gcc_cv_enum_bf_unsigned=yes)])
if test $gcc_cv_enum_bf_unsigned = yes; then
  AC_DEFINE(ENUM_BITFIELDS_ARE_UNSIGNED, 1,
    [Define if enumerated bitfields are treated as unsigned values.])
fi

AC_CHECK_FUNCS(strtoul bsearch putenv popen bcopy \
	strchr strrchr kill getrlimit setrlimit atoll atoq \
	sysconf isascii gettimeofday strsignal putc_unlocked fputc_unlocked \
	fputs_unlocked getrusage iconv nl_langinfo)

AC_CHECK_TYPE(ssize_t, int)

# Try to determine the array type of the second argument of getgroups
# for the target system (int or gid_t).
AC_TYPE_GETGROUPS
if test "${target}" = "${build}"; then
  TARGET_GETGROUPS_T=$ac_cv_type_getgroups
else
  case "${target}" in
	# This condition may need some tweaking.  It should include all
	# targets where the array type of the second argument of getgroups
	# is int and the type of gid_t is not equivalent to int.
	*-*-sunos* | *-*-ultrix*)
		TARGET_GETGROUPS_T=int
		;;
	*)
		TARGET_GETGROUPS_T=gid_t
		;;
  esac
fi
AC_SUBST(TARGET_GETGROUPS_T)

gcc_AC_FUNC_VFPRINTF_DOPRNT
gcc_AC_FUNC_PRINTF_PTR

case "${host}" in
*-*-uwin*)
  AC_MSG_ERROR([
*** UWIN may not be used as a host platform because
*** linking with posix.dll is not allowed by the GNU GPL])
  ;;
esac
AC_FUNC_VFORK
AC_FUNC_MMAP_ANYWHERE
AC_FUNC_MMAP_FILE

# We will need to find libiberty.h and ansidecl.h
saved_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -I${srcdir} -I${srcdir}/../include"
gcc_AC_CHECK_DECLS(bcopy \
	getenv atol sbrk abort atof getcwd getwd \
	strsignal putc_unlocked fputs_unlocked strstr environ \
	malloc realloc calloc free basename getopt, , ,[
#include "gansidecl.h"
#include "system.h"])

gcc_AC_CHECK_DECLS(getrlimit setrlimit getrusage, , ,[
#include "gansidecl.h"
#include "system.h"
#ifdef HAVE_SYS_RESOURCE_H
#include <sys/resource.h>
#endif
])

# Restore CFLAGS from before the gcc_AC_NEED_DECLARATIONS tests.
CFLAGS="$saved_CFLAGS"

# mkdir takes a single argument on some systems. 
gcc_AC_FUNC_MKDIR_TAKES_ONE_ARG

# File extensions
manext='.1'
objext='.o'
AC_SUBST(manext)
AC_SUBST(objext)

build_xm_file=
build_xm_defines=
build_install_headers_dir=install-headers-tar
build_exeext=
host_xm_file=
host_xm_defines=
host_xmake_file=
host_truncate_target=
host_exeext=

# Decode the host machine, then the target machine.
# For the host machine, we save the xm_file variable as host_xm_file;
# then we decode the target machine and forget everything else
# that came from the host machine.
for machine in $build $host $target; do
	. ${srcdir}/config.gcc
done

extra_objs="${host_extra_objs} ${extra_objs}"

# Default the target-machine variables that were not explicitly set.
if test x"$tm_file" = x
then tm_file=$cpu_type/$cpu_type.h; fi

if test x"$extra_headers" = x
then extra_headers=; fi

if test x"$xm_file" = x
then xm_file=$cpu_type/xm-$cpu_type.h; fi

if test x$md_file = x
then md_file=$cpu_type/$cpu_type.md; fi

if test x$out_file = x
then out_file=$cpu_type/$cpu_type.c; fi

if test x"$tmake_file" = x
then tmake_file=$cpu_type/t-$cpu_type
fi

if test x"$dwarf2" = xyes
then tm_file="$tm_file tm-dwarf2.h"
fi

if test x$float_format = x
then float_format=i64
fi

if test $float_format = none
then float_h_file=Makefile.in
else float_h_file=float-$float_format.h
fi

# Handle cpp installation.
if test x$enable_cpp != xno
then
  tmake_file="$tmake_file t-install-cpp"
fi

# Say what files are being used for the output code and MD file.
echo "Using \`$srcdir/config/$out_file' to output insns."
echo "Using \`$srcdir/config/$md_file' as machine description file."

count=a
for f in $tm_file; do
	count=${count}x
done
if test $count = ax; then
	echo "Using \`$srcdir/config/$tm_file' as target machine macro file."
else
	echo "Using the following target machine macro files:"
	for f in $tm_file; do
		echo "	$srcdir/config/$f"
	done
fi

count=a
for f in $host_xm_file; do
	count=${count}x
done
if test $count = ax; then
	echo "Using \`$srcdir/config/$host_xm_file' as host machine macro file."
else
	echo "Using the following host machine macro files:"
	for f in $host_xm_file; do
		echo "	$srcdir/config/$f"
	done
fi

if test "$host_xm_file" != "$build_xm_file"; then
	count=a
	for f in $build_xm_file; do
		count=${count}x
	done
	if test $count = ax; then
		echo "Using \`$srcdir/config/$build_xm_file' as build machine macro file."
	else
		echo "Using the following build machine macro files:"
		for f in $build_xm_file; do
			echo "	$srcdir/config/$f"
		done
	fi
fi

if test x$thread_file = x; then
	if test x$target_thread_file != x; then
		thread_file=$target_thread_file
	else
		thread_file='single'
	fi
fi

# Set up the header files.
# $links is the list of header files to create.
# $vars is the list of shell variables with file names to include.
# auto-host.h is the file containing items generated by autoconf and is
# the first file included by config.h.
null_defines=
host_xm_file="auto-host.h gansidecl.h ${host_xm_file} hwint.h"

# If host=build, it is correct to have hconfig include auto-host.h
# as well.  If host!=build, we are in error and need to do more 
# work to find out the build config parameters.
if test x$host = x$build
then
	build_xm_file="auto-host.h gansidecl.h ${build_xm_file} hwint.h"
else
	# We create a subdir, then run autoconf in the subdir.
	# To prevent recursion we set host and build for the new
	# invocation of configure to the build for this invocation
	# of configure. 
	tempdir=build.$$
	rm -rf $tempdir
	mkdir $tempdir
	cd $tempdir
	case ${srcdir} in
	/* | [A-Za-z]:[\\/]* ) realsrcdir=${srcdir};;
	*) realsrcdir=../${srcdir};;
	esac
	CC=${CC_FOR_BUILD} ${realsrcdir}/configure \
		--target=$target --host=$build --build=$build

	# We just finished tests for the build machine, so rename
	# the file auto-build.h in the gcc directory.
	mv auto-host.h ../auto-build.h
	cd ..
	rm -rf $tempdir
	build_xm_file="auto-build.h gansidecl.h ${build_xm_file} hwint.h"
fi

xm_file="gansidecl.h ${xm_file}"
tm_file="gansidecl.h ${tm_file}"

vars="host_xm_file tm_file tm_p_file xm_file build_xm_file"
links="config.h tm.h tm_p.h tconfig.h hconfig.h"
defines="host_xm_defines null_defines null_defines xm_defines build_xm_defines"

rm -f config.bak
if test -f config.status; then mv -f config.status config.bak; fi

# Make the links.
while test -n "$vars"
do
	set $vars; var=$1; shift; vars=$*
	set $links; link=$1; shift; links=$*
	set $defines; define=$1; shift; defines=$*

	rm -f $link
	# Make sure the file is created, even if it is empty.
	echo >$link

	# Define TARGET_CPU_DEFAULT if the system wants one.
	# This substitutes for lots of *.h files.
	if test "$target_cpu_default" != "" -a $link = tm.h
	then
		echo "#define TARGET_CPU_DEFAULT ($target_cpu_default)" >>$link
	fi

	for file in `eval echo '$'$var`; do
		case $file in
		auto-host.h | auto-build.h )
			;;
		*)
			echo '#ifdef IN_GCC' >>$link
			;;
		esac
		echo "#include \"$file\"" >>$link
		case $file in
		auto-host.h | auto-build.h )
			;;
		*)
			echo '#endif' >>$link
			;;
		esac
	done

	for def in `eval echo '$'$define`; do
		echo "#ifndef $def" >>$link
		echo "#define $def" >>$link
		echo "#endif" >>$link
	done

	if test $link = tm.h
	then
		# Include insn-codes.h last, because it includes machmode.h,
		# and we want EXTRA_CC_MODES to be taken into account.
		echo "#ifndef GENERATOR_FILE" >>$link
		echo "#include \"insn-codes.h\"" >>$link
		echo "#endif" >>$link
	fi
done

# Truncate the target if necessary
if test x$host_truncate_target != x; then
	target=`echo $target | sed -e 's/\(..............\).*/\1/'`
fi

# Get the version trigger filename from the toplevel
if test "${with_gcc_version_trigger+set}" = set; then
	gcc_version_trigger=$with_gcc_version_trigger
else
	gcc_version_trigger=${srcdir}/version.c
fi
changequote(,)dnl
gcc_version_full=`grep version_string ${gcc_version_trigger} | sed -e 's/.*\"\([^\"]*\)\".*/\1/'`
gcc_version=`echo ${gcc_version_full} | sed -e 's/\([^ ]*\) .*/\1/'`

# Compile in configure arguments.
if test -f configargs.h ; then
	# Being re-configured.
	gcc_config_arguments=`grep configuration_arguments configargs.h | sed -e 's/.*\"\([^\"]*\)\".*/\1/'`
	gcc_config_arguments="$gcc_config_arguments : (reconfigured) $TOPLEVEL_CONFIGURE_ARGUMENTS"
else
	gcc_config_arguments="$TOPLEVEL_CONFIGURE_ARGUMENTS"
fi
cat > configargs.h <<EOF
/* Generated automatically. */
static const char configuration_arguments[] = "$gcc_config_arguments";
EOF
changequote([,])dnl

# Internationalization
PACKAGE=gcc
VERSION="$gcc_version"
AC_DEFINE_UNQUOTED(PACKAGE, "$PACKAGE",
	[Define to the name of the distribution.])
AC_DEFINE_UNQUOTED(VERSION, "$VERSION",
	[Define to the version of the distribution.])
AC_SUBST(PACKAGE)
AC_SUBST(VERSION)

ALL_LINGUAS="sv"

# Enable NLS support by default
AC_ARG_ENABLE(nls,
  [  --enable-nls            use Native Language Support (default)],
  , enable_nls=yes)

# if cross compiling, disable NLS support.
# It's not worth the trouble, at least for now.

if test "${build}" != "${host}" && test "x$enable_nls" = "xyes"; then
  AC_MSG_WARN(Disabling NLS support for canadian cross compiler.)
  enable_nls=no
fi

# if NLS is enabled, also enable check in po subdir
if test $enable_nls = yes; then
  CHECK_PO=check-po
else
  CHECK_PO=""
fi

AC_SUBST(CHECK_PO)

AM_GNU_GETTEXT
XGETTEXT="AWK='$AWK' \$(SHELL) \$(top_srcdir)/exgettext $XGETTEXT"

# Windows32 Registry support for specifying GCC installation paths.
AC_ARG_ENABLE(win32-registry,
[  --disable-win32-registry
                          Disable lookup of installation paths in the
                         Registry on Windows hosts.
  --enable-win32-registry Enable registry lookup (default).
  --enable-win32-registry=KEY
                          Use KEY instead of GCC version as the last portion
                         of the registry key.],,)

AC_MSG_CHECKING(whether windows registry support is requested)
if test x$enable_win32_registry != xno; then
  AC_DEFINE(ENABLE_WIN32_REGISTRY, 1,
[Define to 1 if installation paths should be looked up in Windows32
   Registry. Ignored on non windows32 hosts.])
  AC_MSG_RESULT(yes)
else
  AC_MSG_RESULT(no)
fi

# Check if user specified a different registry key.
case x${enable_win32_registry} in
x | xyes)
  # default.
  gcc_cv_win32_registry_key="$VERSION"
  ;;
xno)
  # no registry lookup.
  gcc_cv_win32_registry_key=''
  ;;
*)
  # user-specified key.
  gcc_cv_win32_registry_key="$enable_win32_registry"
  ;;
esac

if test x$enable_win32_registry != xno; then
  AC_MSG_CHECKING(registry key on windows hosts)
  AC_DEFINE_UNQUOTED(WIN32_REGISTRY_KEY, "$gcc_cv_win32_registry_key",
	[Define to be the last portion of registry key on windows hosts.])
  AC_MSG_RESULT($gcc_cv_win32_registry_key)
fi

# Get an absolute path to the GCC top-level source directory
holddir=`pwd`
cd $srcdir
topdir=`pwd`
cd $holddir

# Conditionalize the makefile for this host machine.
# Make-host contains the concatenation of all host makefile fragments
# [there can be more than one].  This file is built by configure.frag.
host_overrides=Make-host
dep_host_xmake_file=
for f in .. ${host_xmake_file}
do
	if test -f ${srcdir}/config/$f
	then
		dep_host_xmake_file="${dep_host_xmake_file} ${srcdir}/config/$f"
	fi
done

# Conditionalize the makefile for this target machine.
# Make-target contains the concatenation of all host makefile fragments
# [there can be more than one].  This file is built by configure.frag.
target_overrides=Make-target
dep_tmake_file=
for f in .. ${tmake_file}
do
	if test -f ${srcdir}/config/$f
	then
		dep_tmake_file="${dep_tmake_file} ${srcdir}/config/$f"
	fi
done

# If the host doesn't support symlinks, modify CC in
# FLAGS_TO_PASS so CC="stage1/xgcc -Bstage1/" works.
# Otherwise, we can use "CC=$(CC)".
rm -f symtest.tem
if $symbolic_link $srcdir/gcc.c symtest.tem 2>/dev/null
then
	cc_set_by_configure="\$(CC)"
	quoted_cc_set_by_configure="\$(CC)"
	stage_prefix_set_by_configure="\$(STAGE_PREFIX)"
else
	rm -f symtest.tem
	if cp -p $srcdir/gcc.c symtest.tem 2>/dev/null
	then
		symbolic_link="cp -p"
	else
		symbolic_link="cp"
	fi
	cc_set_by_configure="\`case '\$(CC)' in stage*) echo '\$(CC)' | sed -e 's|stage|../stage|g';; *) echo '\$(CC)';; esac\`"
	quoted_cc_set_by_configure="\\\`case '\\\$(CC)' in stage*) echo '\\\$(CC)' | sed -e 's|stage|../stage|g';; *) echo '\\\$(CC)';; esac\\\`"
	stage_prefix_set_by_configure="\`case '\$(STAGE_PREFIX)' in stage*) echo '\$(STAGE_PREFIX)' | sed -e 's|stage|../stage|g';; *) echo '\$(STAGE_PREFIX)';; esac\`"
fi
rm -f symtest.tem

out_object_file=`basename $out_file .c`.o

tm_file_list=
for f in $tm_file; do
  case $f in
    gansidecl.h )
       tm_file_list="${tm_file_list} $f" ;;
    *) tm_file_list="${tm_file_list} \$(srcdir)/config/$f" ;;
  esac
done

host_xm_file_list=
for f in $host_xm_file; do
  case $f in
    auto-host.h | gansidecl.h | hwint.h )
       host_xm_file_list="${host_xm_file_list} $f" ;;
    *) host_xm_file_list="${host_xm_file_list} \$(srcdir)/config/$f" ;;
  esac
done

build_xm_file_list=
for f in $build_xm_file; do
  case $f in
    auto-build.h | auto-host.h | gansidecl.h | hwint.h )
       build_xm_file_list="${build_xm_file_list} $f" ;;
    *) build_xm_file_list="${build_xm_file_list} \$(srcdir)/config/$f" ;;
  esac
done

# Define macro CROSS_COMPILE in compilation
# if this is a cross-compiler.
# Also use all.cross instead of all.internal
# and add cross-make to Makefile.
cross_overrides="/dev/null"
if test x$host != x$target
then
	cross_defines="CROSS=-DCROSS_COMPILE"
	cross_overrides="${topdir}/cross-make"
fi

# If this is a cross-compiler that does not
# have its own set of headers then define
# inhibit_libc

# If this is using newlib, then define inhibit_libc in
# LIBGCC2_CFLAGS.  This will cause __eprintf to be left out of
# libgcc.a, but that's OK because newlib should have its own version of
# assert.h.
inhibit_libc=
if [test x$host != x$target] && [test x$with_headers = x]; then
       inhibit_libc=-Dinhibit_libc
else
       if [test x$with_newlib = xyes]; then
               inhibit_libc=-Dinhibit_libc
       fi
fi
AC_SUBST(inhibit_libc)

# When building gcc with a cross-compiler, we need to fix a few things.
# This must come after cross-make as we want all.build to override
# all.cross.
build_overrides="/dev/null"
if test x$build != x$host
then
	build_overrides="${topdir}/build-make"
fi

# Expand extra_headers to include complete path.
# This substitutes for lots of t-* files.
extra_headers_list=
if test "x$extra_headers" = x
then true
else
	# Prepend ${srcdir}/ginclude/ to every entry in extra_headers.
	for file in $extra_headers;
	do
		extra_headers_list="${extra_headers_list} \$(srcdir)/ginclude/${file}"
	done
fi

if test x$use_collect2 = xno; then
	use_collect2=
fi

# Add a definition of USE_COLLECT2 if system wants one.
# Also tell toplev.c what to do.
# This substitutes for lots of t-* files.
if test x$use_collect2 = x
then
	will_use_collect2=
	maybe_use_collect2=
else
	will_use_collect2="collect2"
	maybe_use_collect2="-DUSE_COLLECT2"
fi

# If we have gas in the build tree, make a link to it.
if test -f ../gas/Makefile; then
	rm -f as; $symbolic_link ../gas/as-new$host_exeext as$host_exeext 2>/dev/null
fi

# If we have nm in the build tree, make a link to it.
if test -f ../binutils/Makefile; then
	rm -f nm; $symbolic_link ../binutils/nm-new$host_exeext nm$host_exeext 2>/dev/null
fi

# If we have ld in the build tree, make a link to it.
if test -f ../ld/Makefile; then
#	if test x$use_collect2 = x; then
#		rm -f ld; $symbolic_link ../ld/ld-new$host_exeext ld$host_exeext 2>/dev/null
#	else
		rm -f collect-ld; $symbolic_link ../ld/ld-new$host_exeext collect-ld$host_exeext 2>/dev/null
#	fi
fi

# Figure out what assembler we will be using.
AC_MSG_CHECKING(what assembler to use)
gcc_cv_as=
gcc_cv_gas_major_version=
gcc_cv_gas_minor_version=
gcc_cv_as_gas_srcdir=`echo $srcdir | sed -e 's,/gcc$,,'`/gas
if test -x "$DEFAULT_ASSEMBLER"; then
	gcc_cv_as="$DEFAULT_ASSEMBLER"
elif test -x "$AS"; then
	gcc_cv_as="$AS"
elif test -x as$host_exeext; then
	# Build using assembler in the current directory.
	gcc_cv_as=./as$host_exeext
elif test -f $gcc_cv_as_gas_srcdir/configure.in -a -f ../gas/Makefile; then
	# Single tree build which includes gas.
	for f in $gcc_cv_as_gas_srcdir/configure $gcc_cv_as_gas_srcdir/configure.in $gcc_cv_as_gas_srcdir/Makefile.in
	do
changequote(,)dnl
		gcc_cv_gas_version=`grep '^VERSION=[0-9]*\.[0-9]*' $f`
changequote([,])dnl
		if test x$gcc_cv_gas_version != x; then
			break
		fi
	done
changequote(,)dnl
	gcc_cv_gas_major_version=`expr "$gcc_cv_gas_version" : "VERSION=\([0-9]*\)"`
	gcc_cv_gas_minor_version=`expr "$gcc_cv_gas_version" : "VERSION=[0-9]*\.\([0-9]*\)"`
changequote([,])dnl
fi

if test "x$gcc_cv_as" = x -a x$host = x$target; then
	# Native build.
	# Search the same directories that the installed compiler will
	# search.  Else we may find the wrong assembler and lose.  If we
	# do not find a suitable assembler binary, then try the user's
	# path.
	#
	# Also note we have to check MD_EXEC_PREFIX before checking the
	# user's path.  Unfortunately, there is no good way to get at the
	# value of MD_EXEC_PREFIX here.  So we do a brute force search
	# through all the known MD_EXEC_PREFIX values.  Ugh.  This needs
	# to be fixed as part of the make/configure rewrite too.

	if test "x$exec_prefix" = xNONE; then
		if test "x$prefix" = xNONE; then
			test_prefix=/usr/local
		else
			test_prefix=$prefix
		fi
	else
		test_prefix=$exec_prefix
	fi

	# If the loop below does not find an assembler, then use whatever
	# one we can find in the users's path.
	# user's path.
	as=as$host_exeext

	test_dirs="$test_prefix/lib/gcc-lib/$target/$gcc_version \
		   $test_prefix/lib/gcc-lib/$target \
		   /usr/lib/gcc/$target/$gcc_version \
		   /usr/lib/gcc/$target \
		   $test_prefix/$target/bin/$target/$gcc_version \
		   $test_prefix/$target/bin \
		   /usr/libexec \
		   /usr/ccs/gcc \
		   /usr/ccs/bin \
		   /udk/usr/ccs/bin \
		   /bsd43/usr/lib/cmplrs/cc \
		   /usr/cross64/usr/bin \
		   /usr/lib/cmplrs/cc \
		   /sysv/usr/lib/cmplrs/cc \
		   /svr4/usr/lib/cmplrs/cc \
		   /usr/bin"

	for dir in $test_dirs; do
		if test -f $dir/as$host_exeext; then
			gcc_cv_as=$dir/as$host_exeext
			break;
		fi
	done
fi
if test x$gcc_cv_gas_major_version != x -a x$gcc_cv_gas_minor_version != x; then
  AC_MSG_RESULT("newly built gas")
else
  AC_MSG_RESULT($gcc_cv_as)
fi

# Figure out what nm we will be using.
AC_MSG_CHECKING(what nm to use)
if test -x nm$host_exeext; then
	gcc_cv_nm=./nm$host_exeext
elif test x$host = x$target; then
	# Native build.
	gcc_cv_nm=nm$host_exeext
fi
AC_MSG_RESULT($gcc_cv_nm)

# Figure out what assembler alignment features are present.
AC_MSG_CHECKING(assembler alignment features)
gcc_cv_as_alignment_features=none
if test x$gcc_cv_gas_major_version != x -a x$gcc_cv_gas_minor_version != x; then
	# Gas version 2.6 and later support for .balign and .p2align.
	# bytes to skip when using .p2align.
	if test "$gcc_cv_gas_major_version" -eq 2 -a "$gcc_cv_gas_minor_version" -ge 6 -o "$gcc_cv_gas_major_version" -gt 2; then
		gcc_cv_as_alignment_features=".balign and .p2align"
		AC_DEFINE(HAVE_GAS_BALIGN_AND_P2ALIGN)
	fi
	# Gas version 2.8 and later support specifying the maximum
	# bytes to skip when using .p2align.
	if test "$gcc_cv_gas_major_version" -eq 2 -a "$gcc_cv_gas_minor_version" -ge 8 -o "$gcc_cv_gas_major_version" -gt 2; then
		gcc_cv_as_alignment_features=".p2align including maximum skip"
		AC_DEFINE(HAVE_GAS_MAX_SKIP_P2ALIGN)
	fi
elif test x$gcc_cv_as != x; then
	# Check if we have .balign and .p2align
	echo ".balign  4" > conftest.s
	echo ".p2align  2" >> conftest.s
	if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
		gcc_cv_as_alignment_features=".balign and .p2align"
		AC_DEFINE(HAVE_GAS_BALIGN_AND_P2ALIGN)
	fi
	rm -f conftest.s conftest.o
	# Check if specifying the maximum bytes to skip when
	# using .p2align is supported.
	echo ".p2align 4,,7" > conftest.s
	if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
		gcc_cv_as_alignment_features=".p2align including maximum skip"
		AC_DEFINE(HAVE_GAS_MAX_SKIP_P2ALIGN)
	fi
	rm -f conftest.s conftest.o
fi
AC_MSG_RESULT($gcc_cv_as_alignment_features)

AC_MSG_CHECKING(assembler subsection support)
gcc_cv_as_subsections=no
if test x$gcc_cv_gas_major_version != x -a x$gcc_cv_gas_minor_version != x; then
  if test "$gcc_cv_gas_major_version" -eq 2 -a "$gcc_cv_gas_minor_version" -ge 9 -o "$gcc_cv_gas_major_version" -gt 2 && grep 'obj_format = elf' ../gas/Makefile > /dev/null; then
    gcc_cv_as_subsections="working .subsection -1"
  fi
elif test x$gcc_cv_as != x; then
	# Check if we have .subsection
	echo ".subsection 1" > conftest.s
	if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
		gcc_cv_as_subsections=".subsection"
		if test x$gcc_cv_nm != x; then
			cat > conftest.s <<EOF
conftest_label1: .word 0
.subsection -1
conftest_label2: .word 0
.previous
EOF
			if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
				$gcc_cv_nm conftest.o | grep conftest_label1 > conftest.nm1
				$gcc_cv_nm conftest.o | grep conftest_label2 | sed -e 's/label2/label1/' > conftest.nm2
				if cmp conftest.nm1 conftest.nm2 > /dev/null 2>&1; then
					:
				else
					gcc_cv_as_subsections="working .subsection -1"
				fi
			fi
		fi
	fi
	rm -f conftest.s conftest.o conftest.nm1 conftest.nm2
fi
if test x"$gcc_cv_as_subsections" = x"working .subsection -1"; then
	AC_DEFINE(HAVE_GAS_SUBSECTION_ORDERING, 1,
[Define if your assembler supports .subsection and .subsection -1 starts
   emitting at the beginning of your section.])
fi
AC_MSG_RESULT($gcc_cv_as_subsections)

AC_MSG_CHECKING(assembler weak support)
gcc_cv_as_weak=no
if test x$gcc_cv_gas_major_version != x -a x$gcc_cv_gas_minor_version != x; then
  if test "$gcc_cv_gas_major_version" -eq 2 -a "$gcc_cv_gas_minor_version" -ge 2 -o "$gcc_cv_gas_major_version" -gt 2; then
    gcc_cv_as_weak="yes"
  fi
elif test x$gcc_cv_as != x; then
	# Check if we have .weak
	echo "	.weak foobar" > conftest.s
	if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
		gcc_cv_as_weak="yes"
	fi
	rm -f conftest.s conftest.o conftest.nm1 conftest.nm2
fi
if test x"$gcc_cv_as_weak" = xyes; then
	AC_DEFINE(HAVE_GAS_WEAK, 1, [Define if your assembler supports .weak.])
fi
AC_MSG_RESULT($gcc_cv_as_weak)

AC_MSG_CHECKING(assembler hidden support)
gcc_cv_as_hidden=no
if test x$gcc_cv_gas_major_version != x -a x$gcc_cv_gas_minor_version != x; then
  if test "$gcc_cv_gas_major_version" -eq 2 -a "$gcc_cv_gas_minor_version" -ge 10 -o "$gcc_cv_gas_major_version" -gt 2 && grep 'obj_format = elf' ../gas/Makefile > /dev/null; then
    gcc_cv_as_hidden="yes"
  fi
elif test x$gcc_cv_as != x; then
	# Check if we have .hidden
	echo "	.hidden foobar" > conftest.s
	echo "foobar:" >> conftest.s
	if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
		gcc_cv_as_hidden="yes"
	fi
	rm -f conftest.s conftest.o conftest.nm1 conftest.nm2
fi
if test x"$gcc_cv_as_hidden" = xyes; then
	AC_DEFINE(HAVE_GAS_HIDDEN, 1,
		[Define if your assembler supports .hidden.])
fi
AC_MSG_RESULT($gcc_cv_as_hidden)

case "$target" in 
  sparc*-*-*)
    AC_CACHE_CHECK([assembler .register pseudo-op support],
	gcc_cv_as_register_pseudo_op, [
	gcc_cv_as_register_pseudo_op=unknown
	if test x$gcc_cv_as != x; then
	    # Check if we have .register
	    echo ".register %g2, #scratch" > conftest.s
	    if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
		gcc_cv_as_register_pseudo_op=yes
	    else
		gcc_cv_as_register_pseudo_op=no
	    fi
	    rm -f conftest.s conftest.o
	fi
    ])
    if test "x$gcc_cv_as_register_pseudo_op" = xyes; then
	AC_DEFINE(HAVE_AS_REGISTER_PSEUDO_OP, 1,
		[Define if your assembler supports .register.])
    fi

    AC_CACHE_CHECK([assembler supports -relax],
	gcc_cv_as_relax_opt, [
	gcc_cv_as_relax_opt=unknown
	if test x$gcc_cv_as != x; then
	    # Check if gas supports -relax
	    echo ".text" > conftest.s
	    if $gcc_cv_as -relax -o conftest.o conftest.s > /dev/null 2>&1; then
		gcc_cv_as_relax_opt=yes
	    else
		gcc_cv_as_relax_opt=no
	    fi
	    rm -f conftest.s conftest.o
	fi
    ])
    if test "x$gcc_cv_as_relax_opt" = xyes; then
	AC_DEFINE(HAVE_AS_RELAX_OPTION, 1,
		[Define if your assembler supports -relax option.])
    fi

    case "$tm_file" in
    *64*)
	AC_CACHE_CHECK([for 64 bit support in assembler ($gcc_cv_as)],
	    gcc_cv_as_flags64, [
		if test -n "$gcc_cv_as"; then
		    echo ".xword foo" > conftest.s
		    gcc_cv_as_flags64=no
		    for flag in "-xarch=v9" "-64 -Av9"; do
			if $gcc_cv_as $flag -o conftest.o conftest.s \
			    > /dev/null 2>&1; then
			    gcc_cv_as_flags64=$flag
			    break
			fi
		    done
		    rm -f conftest.s conftest.o
		else
		    if test "$gas" = yes; then
			gcc_cv_as_flags64="-64 -Av9"
		    else
			gcc_cv_as_flags64="-xarch=v9"
		    fi
		fi
	])
	if test "x$gcc_cv_as_flags64" = xno; then
changequote(, )
	    tmake_file=`echo " $tmake_file " | sed -e 's, sparc/t-sol2-64 , ,' -e 's,^ ,,' -e 's, $,,'`
	    dep_tmake_file=`echo " $dep_tmake_file " | sed -e 's, [^ ]*/config/sparc/t-sol2-64 , ,' -e 's,^ ,,' -e 's, $,,'`
changequote([, ])
	else
	    AC_DEFINE_UNQUOTED(AS_SPARC64_FLAG, "$gcc_cv_as_flags64",
			[Define if the assembler supports 64bit sparc.])
	fi
	;;
    *) gcc_cv_as_flags64=${gcc_cv_as_flags64-no}
	;;
    esac

    if test "x$gcc_cv_as_flags64" != xno; then
	AC_CACHE_CHECK([for assembler offsetable %lo() support],
	    gcc_cv_as_offsetable_lo10, [
	    gcc_cv_as_offsetable_lo10=unknown
	    if test "x$gcc_cv_as" != x; then
		# Check if assembler has offsetable %lo()
		echo "or %g1, %lo(ab) + 12, %g1" > conftest.s
		echo "or %g1, %lo(ab + 12), %g1" > conftest1.s
		if $gcc_cv_as $gcc_cv_as_flags64 -o conftest.o conftest.s \
			> /dev/null 2>&1 &&
		   $gcc_cv_as $gcc_cv_as_flags64 -o conftest1.o conftest1.s \
			> /dev/null 2>&1; then
		    if cmp conftest.o conftest1.o > /dev/null 2>&1; then
			gcc_cv_as_offsetable_lo10=no
		    else
			gcc_cv_as_offsetable_lo10=yes
		    fi
		else
		    gcc_cv_as_offsetable_lo10=no
		fi
		rm -f conftest.s conftest.o conftest1.s conftest1.o
	    fi
	])
	if test "x$gcc_cv_as_offsetable_lo10" = xyes; then
	    AC_DEFINE(HAVE_AS_OFFSETABLE_LO10, 1,
		[Define if your assembler supports offsetable %lo().])
	fi
    fi
    ;;

changequote(,)dnl
  i[34567]86-*-*)
changequote([,])dnl
    AC_MSG_CHECKING(assembler instructions)
    gcc_cv_as_instructions=
    if test x$gcc_cv_gas_major_version != x -a x$gcc_cv_gas_minor_version != x; then
      if test "$gcc_cv_gas_major_version" -eq 2 -a "$gcc_cv_gas_minor_version" -ge 9 -o "$gcc_cv_gas_major_version" -gt 2; then
	gcc_cv_as_instructions="filds fists"
      fi
    elif test x$gcc_cv_as != x; then
	set "filds fists" "filds mem; fists mem"
	while test $# -gt 0
  	do
		echo "$2" > conftest.s
		if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1; then
			gcc_cv_as_instructions=${gcc_cv_as_instructions}$1" "
		fi
		shift 2
	done
	rm -f conftest.s conftest.o
    fi
    if test x"$gcc_cv_as_instructions" != x; then
	AC_DEFINE_UNQUOTED(HAVE_GAS_`echo "$gcc_cv_as_instructions" | sed -e 's/ $//' | tr '[a-z ]' '[A-Z_]'`)
    fi
    AC_MSG_RESULT($gcc_cv_as_instructions)
    ;;
esac

AC_MSG_CHECKING(assembler dwarf2 debug_line support)
gcc_cv_as_dwarf2_debug_line=no
# ??? Not all targets support dwarf2 debug_line, even within a version
# of gas.  Moreover, we need to emit a valid instruction to trigger any
# info to the output file.  So, as supported targets are added to gas 2.11,
# add some instruction here to (also) show we expect this might work.
# ??? Once 2.11 is released, probably need to add first known working
# version to the per-target configury.
case "$target" in
  i?86*-*-* | mips*-*-* | alpha*-*-* | powerpc*-*-* | sparc*-*-*)
    insn="nop"
    ;;
  ia64*-*-*)
    insn="nop 0"
    ;;
  esac
if test x$gcc_cv_gas_major_version != x -a x$gcc_cv_gas_minor_version != x;
then
  if test "$gcc_cv_gas_major_version" -eq 2 \
	-a "$gcc_cv_gas_minor_version" -ge 11 \
	-o "$gcc_cv_gas_major_version" -gt 2 \
     && grep 'obj_format = elf' ../gas/Makefile > /dev/null \
     && test x"$insn" != x ; then
    gcc_cv_as_dwarf2_debug_line="yes"
  fi
elif test x$gcc_cv_as != x -a x"$insn" != x ; then
	echo '	.file 0 "conftest.s"' > conftest.s
	echo '	.loc 0 3 0' >> conftest.s
	echo "	$insn" >> conftest.s
	if $gcc_cv_as -o conftest.o conftest.s > /dev/null 2>&1 \
	   && grep debug_line conftest.o > /dev/null 2>&1 ; then
		gcc_cv_as_dwarf2_debug_line="yes"
	fi
	rm -f conftest.s conftest.o conftest.nm1 conftest.nm2
fi
if test x"$gcc_cv_as_dwarf2_debug_line" = xyes; then
	AC_DEFINE(HAVE_AS_DWARF2_DEBUG_LINE, 1,
	  [Define if your assembler supports dwarf2 .file/.loc directives.])
fi
AC_MSG_RESULT($gcc_cv_as_dwarf2_debug_line)

# Figure out what language subdirectories are present.
# Look if the user specified --enable-languages="..."; if not, use
# the environment variable $LANGUAGES if defined. $LANGUAGES might
# go away some day.
if test x"${enable_languages+set}" != xset; then
	if test x"${LANGUAGES+set}" = xset; then
		enable_languages="`echo ${LANGUAGES} | tr ' ' ','`"
	else
		enable_languages=all
	fi
else
	if test x"${enable_languages}" = x; then
		AC_MSG_ERROR([--enable-languages needs at least one argument])
	fi
fi
subdirs=
for lang in ${srcdir}/*/config-lang.in ..
do
	case $lang in
	..) ;;
	# The odd quoting in the next line works around
	# an apparent bug in bash 1.12 on linux.
changequote(,)dnl
	${srcdir}/[*]/config-lang.in) ;;
	*)
	  lang_alias=`sed -n -e 's,^language=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^language=\([^ 	]*\).*$,\1,p' $lang`
	  this_lang_libs=`sed -n -e 's,^target_libs=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^target_libs=\([^ 	]*\).*$,\1,p' $lang`
	  build_by_default=`sed -n -e 's,^build_by_default=['"'"'"'"]\(.*\)["'"'"'"'].*$,\1,p' -e 's,^build_by_default=\([^ 	]*\).*$,\1,p' $lang`
	  if test "x$lang_alias" = x
	  then
		echo "$lang doesn't set \$language." 1>&2
		exit 1
	  fi
	  case ${build_by_default},${enable_languages}, in
	  *,$lang_alias,*) add_this_lang=yes ;;
	  no,*) add_this_lang=no ;;
	  *,all,*) add_this_lang=yes ;;
	  *) add_this_lang=no ;;
	  esac
	  if test x"${add_this_lang}" = xyes; then
		case $lang in
		    ${srcdir}/ada/config-lang.in)
			if test x$gnat = xyes ; then
				subdirs="$subdirs `echo $lang | sed -e 's,^.*/\([^/]*\)/config-lang.in$,\1,'`"
			fi
			;;
		    *)
			subdirs="$subdirs `echo $lang | sed -e 's,^.*/\([^/]*\)/config-lang.in$,\1,'`"
			;;
		esac
	  fi
	  ;;
changequote([,])dnl
	esac
done

# Make gthr-default.h if we have a thread file.
gthread_flags=
if test $thread_file != single; then
    rm -f gthr-default.h
    echo "#include \"gthr-${thread_file}.h\"" > gthr-default.h
    gthread_flags=-DHAVE_GTHR_DEFAULT
fi
AC_SUBST(gthread_flags)

# Find out what GC implementation we want, or may, use.
AC_ARG_WITH(gc,
[  --with-gc={simple,page} Choose the garbage collection mechanism to use
                           with the compiler.],
[case "$withval" in
  simple | page)
    GGC=ggc-$withval
    ;;
  *)
    AC_MSG_ERROR([$withval is an invalid option to --with-gc])
    ;;
esac],
[GGC=ggc-page])
AC_SUBST(GGC)
echo "Using $GGC for garbage collection."

# Use the system's zlib library.
zlibdir=-L../zlib
zlibinc="-I\$(srcdir)/../zlib"
AC_ARG_WITH(system-zlib,
[  --with-system-zlib      use installed libz],
zlibdir=
zlibinc=
)
AC_SUBST(zlibdir)
AC_SUBST(zlibinc)

# Build a new-abi (c++) system
AC_ARG_ENABLE(new-gxx-abi,
[  --enable-new-gxx-abi
			  select the new abi for g++. You must select an ABI
			  at configuration time, so that the correct runtime
			  support is built. You cannot mix ABIs.],
   ,
  enable_new_gxx_abi=yes)

if test x$enable_new_gxx_abi = xyes; then
  AC_DEFINE(ENABLE_NEW_GXX_ABI, 1,
	    [Define if you want to always select the new-abi for g++.])
  GXX_ABI_FLAG='-fnew-abi'
else
  GXX_ABI_FLAG=
fi
AC_SUBST(GXX_ABI_FLAG)

AC_DEFINE_UNQUOTED(ENABLE_STD_NAMESPACE, $ac_esn,
  [Define to 1 if you want to enable namespaces (-fhonor-std) by default.])
AC_SUBST(HAVE_LIBSTDCXX_V3)

dnl Very limited version of automake's enable-maintainer-mode

AC_MSG_CHECKING([whether to enable maintainer-specific portions of Makefiles])
  dnl maintainer-mode is disabled by default
  AC_ARG_ENABLE(maintainer-mode,
[  --enable-maintainer-mode enable make rules and dependencies not useful
                          (and sometimes confusing) to the casual installer],
      maintainer_mode=$enableval,
      maintainer_mode=no)

AC_MSG_RESULT($maintainer_mode)

if test "$maintainer_mode" = "yes"; then
  MAINT=''
else
  MAINT='#'
fi
AC_SUBST(MAINT)dnl

# Make empty files to contain the specs and options for each language.
# Then add #include lines to for a compiler that has specs and/or options.

lang_specs_files=
lang_options_files=
lang_tree_files=
rm -f specs.h options.h gencheck.h
touch specs.h options.h gencheck.h
for subdir in . $subdirs
do
	if test -f $srcdir/$subdir/lang-specs.h; then
		echo "#include \"$subdir/lang-specs.h\"" >>specs.h
		lang_specs_files="$lang_specs_files $srcdir/$subdir/lang-specs.h"
	fi
	if test -f $srcdir/$subdir/lang-options.h; then
		echo "#include \"$subdir/lang-options.h\"" >>options.h
		lang_options_files="$lang_options_files $srcdir/$subdir/lang-options.h"
	fi
	if test -f $srcdir/$subdir/$subdir-tree.def; then
		echo "#include \"$subdir/$subdir-tree.def\"" >>gencheck.h
		lang_tree_files="$lang_tree_files $srcdir/$subdir/$subdir-tree.def"
	fi
done

# These (without "all_") are set in each config-lang.in.
# `language' must be a single word so is spelled singularly.
all_languages=
all_boot_languages=
all_compilers=
all_stagestuff=
all_diff_excludes=
all_outputs='Makefile intl/Makefile po/Makefile.in fixinc/Makefile gccbug mklibgcc'
# List of language makefile fragments.
all_lang_makefiles=
all_headers=
all_lib2funcs=

# Add the language fragments.
# Languages are added via two mechanisms.  Some information must be
# recorded in makefile variables, these are defined in config-lang.in.
# We accumulate them and plug them into the main Makefile.
# The other mechanism is a set of hooks for each of the main targets
# like `clean', `install', etc.

language_fragments="Make-lang"
language_hooks="Make-hooks"

for s in .. $subdirs
do
	if test $s != ".."
	then
		language=
		boot_language=
		compilers=
		stagestuff=
		diff_excludes=
		headers=
		outputs=
		lib2funcs=
		. ${srcdir}/$s/config-lang.in
		if test "x$language" = x
		then
			echo "${srcdir}/$s/config-lang.in doesn't set \$language." 1>&2
			exit 1
		fi
		all_lang_makefiles="$all_lang_makefiles ${srcdir}/$s/Make-lang.in"
		if test -f ${srcdir}/$s/Makefile.in
		then all_lang_makefiles="$all_lang_makefiles ${srcdir}/$s/Makefile.in"
		fi
		all_languages="$all_languages $language"
		if test "x$boot_language" = xyes
		then
			all_boot_languages="$all_boot_languages $language"
		fi
		all_compilers="$all_compilers $compilers"
		all_stagestuff="$all_stagestuff $stagestuff"
		all_diff_excludes="$all_diff_excludes $diff_excludes"
		all_headers="$all_headers $headers"
		all_outputs="$all_outputs $outputs"
		all_lib2funcs="$all_lib2funcs $lib2funcs"
	fi
done

# Since we can't use `::' targets, we link each language in
# with a set of hooks, reached indirectly via lang.${target}.

rm -f Make-hooks
touch Make-hooks
target_list="all.build all.cross start.encap rest.encap \
	info dvi \
	install-normal install-common install-info install-man \
	uninstall \
	mostlyclean clean distclean extraclean maintainer-clean \
	stage1 stage2 stage3 stage4"
for t in $target_list
do
	x=
	for lang in .. $all_languages
	do
		if test $lang != ".."; then
			x="$x $lang.$t"
		fi
	done
	echo "lang.$t: $x" >> Make-hooks
done

# If we're not building in srcdir, create .gdbinit.

if test ! -f Makefile.in; then
	echo "dir ." > .gdbinit
	echo "dir ${srcdir}" >> .gdbinit
	if test x$gdb_needs_out_file_path = xyes
	then
		echo "dir ${srcdir}/config/"`dirname ${out_file}` >> .gdbinit
	fi
	if test "x$subdirs" != x; then
		for s in $subdirs
		do
			echo "dir ${srcdir}/$s" >> .gdbinit
		done
	fi
	echo "source ${srcdir}/.gdbinit" >> .gdbinit
fi

# Define variables host_canonical and build_canonical
# because some Cygnus local changes in the Makefile depend on them.
build_canonical=${build}
host_canonical=${host}
target_subdir=
if test "${host}" != "${target}" ; then
    target_subdir=${target}/
fi
AC_SUBST(build_canonical)
AC_SUBST(host_canonical)
AC_SUBST(target_subdir)
	
# If $(exec_prefix) exists and is not the same as $(prefix), then compute an
# absolute path for gcc_tooldir based on inserting the number of up-directory
# movements required to get from $(exec_prefix) to $(prefix) into the basic
# $(libsubdir)/@(unlibsubdir) based path.
# Don't set gcc_tooldir to tooldir since that's only passed in by the toplevel
# make and thus we'd get different behavior depending on where we built the
# sources.
if test x$exec_prefix = xNONE -o x$exec_prefix = x$prefix; then
    gcc_tooldir='$(libsubdir)/$(unlibsubdir)/../$(target_alias)'
else
changequote(<<, >>)dnl
# An explanation of the sed strings:
#  -e 's|^\$(prefix)||'   matches and eliminates 'prefix' from 'exec_prefix'
#  -e 's|/$||'            match a trailing forward slash and eliminates it
#  -e 's|^[^/]|/|'        forces the string to start with a forward slash (*)
#  -e 's|/[^/]*|../|g'    replaces each occurance of /<directory> with ../
#
# (*) Note this pattern overwrites the first character of the string
# with a forward slash if one is not already present.  This is not a
# problem because the exact names of the sub-directories concerned is
# unimportant, just the number of them matters.
#
# The practical upshot of these patterns is like this:
#
#  prefix     exec_prefix        result
#  ------     -----------        ------
#   /foo        /foo/bar          ../
#   /foo/       /foo/bar          ../
#   /foo        /foo/bar/         ../
#   /foo/       /foo/bar/         ../
#   /foo        /foo/bar/ugg      ../../
#
    dollar='$$'
    gcc_tooldir="\$(libsubdir)/\$(unlibsubdir)/\`echo \$(exec_prefix) | sed -e 's|^\$(prefix)||' -e 's|/\$(dollar)||' -e 's|^[^/]|/|' -e 's|/[^/]*|../|g'\`\$(target_alias)"
changequote([, ])dnl
fi
AC_SUBST(gcc_tooldir)
AC_SUBST(dollar)

# Find a directory in which to install a shared libgcc.

AC_ARG_ENABLE(version-specific-runtime-libs,
[  --enable-version-specific-runtime-libs    Specify that runtime libraries shou
ld be installed in a compiler-specific directory ])

AC_ARG_WITH(slibdir,
[  --with-slibdir=DIR      shared libraries in DIR [LIBDIR]],
slibdir="$with_slibdir",
if test "${enable_version_specific_runtime_libs+set}" = set; then
  slibdir='$(libsubdir)'
elif test "$host" != "$target"; then
  slibdir='$(build_tooldir)/lib'
else
  slibdir='$(libdir)'
fi)
AC_SUBST(slibdir)

# Nothing to do for FLOAT_H, float_format already handled.
objdir=`pwd`
AC_SUBST(objdir)

# Process the language and host/target makefile fragments.
${CONFIG_SHELL-/bin/sh} $srcdir/configure.frag $srcdir "$subdirs" "$dep_host_xmake_file" "$dep_tmake_file"

# Substitute configuration variables
AC_SUBST(subdirs)
AC_SUBST(all_boot_languages)
AC_SUBST(all_compilers)
AC_SUBST(all_diff_excludes)
AC_SUBST(all_headers)
AC_SUBST(all_lang_makefiles)
AC_SUBST(all_languages)
AC_SUBST(all_lib2funcs)
AC_SUBST(all_stagestuff)
AC_SUBST(build_exeext)
AC_SUBST(build_install_headers_dir)
AC_SUBST(build_xm_file_list)
AC_SUBST(cc_set_by_configure)
AC_SUBST(quoted_cc_set_by_configure)
AC_SUBST(cpp_install_dir)
AC_SUBST(dep_host_xmake_file)
AC_SUBST(dep_tmake_file)
AC_SUBST(extra_c_flags)
AC_SUBST(extra_headers_list)
AC_SUBST(extra_objs)
AC_SUBST(extra_parts)
AC_SUBST(extra_passes)
AC_SUBST(extra_programs)
AC_SUBST(float_h_file)
AC_SUBST(gcc_config_arguments)
AC_SUBST(gcc_gxx_include_dir)
AC_SUBST(libstdcxx_incdir)
AC_SUBST(gcc_version)
AC_SUBST(gcc_version_full)
AC_SUBST(gcc_version_trigger)
AC_SUBST(host_exeext)
AC_SUBST(host_extra_gcc_objs)
AC_SUBST(host_xm_file_list)
AC_SUBST(install)
AC_SUBST(lang_options_files)
AC_SUBST(lang_specs_files)
AC_SUBST(lang_tree_files)
AC_SUBST(local_prefix)
AC_SUBST(maybe_use_collect2)
AC_SUBST(md_file)
AC_SUBST(objc_boehm_gc)
AC_SUBST(out_file)
AC_SUBST(out_object_file)
AC_SUBST(stage_prefix_set_by_configure)
AC_SUBST(symbolic_link)
AC_SUBST(thread_file)
AC_SUBST(tm_file_list)
AC_SUBST(will_use_collect2)
AC_SUBST(c_target_objs)
AC_SUBST(cxx_target_objs)


AC_SUBST_FILE(target_overrides)
AC_SUBST_FILE(host_overrides)
AC_SUBST(cross_defines)
AC_SUBST_FILE(cross_overrides)
AC_SUBST_FILE(build_overrides)
AC_SUBST_FILE(language_fragments)
AC_SUBST_FILE(language_hooks)

# Echo that links are built
if test x$host = x$target
then
	str1="native "
else
	str1="cross-"
	str2=" from $host"
fi

if test x$host != x$build
then
	str3=" on a $build system"
fi

if test "x$str2" != x || test "x$str3" != x
then
	str4=
fi

echo "Links are now set up to build a ${str1}compiler for ${target}$str4" 1>&2

if test "x$str2" != x || test "x$str3" != x
then
	echo " ${str2}${str3}." 1>&2
fi

# Truncate the target if necessary
if test x$host_truncate_target != x; then
	target=`echo $target | sed -e 's/\(..............\).*/\1/'`
fi

# Configure the subdirectories
# AC_CONFIG_SUBDIRS($subdirs)

# Create the Makefile
# and configure language subdirectories
AC_OUTPUT($all_outputs,
[
case x$CONFIG_HEADERS in
xauto-host.h:config.in)
echo > cstamp-h ;;
esac
# If the host supports symlinks, point stage[1234] at ../stage[1234] so
# bootstrapping and the installation procedure can still use
# CC="stage1/xgcc -Bstage1/".  If the host doesn't support symlinks,
# FLAGS_TO_PASS has been modified to solve the problem there.
# This is virtually a duplicate of what happens in configure.lang; we do
# an extra check to make sure this only happens if ln -s can be used.
if test "$symbolic_link" = "ln -s"; then
 for d in .. ${subdirs} ; do
   if test $d != ..; then
	STARTDIR=`pwd`
	cd $d
	for t in stage1 stage2 stage3 stage4 include
	do
		rm -f $t
		$symbolic_link ../$t $t 2>/dev/null
	done
	cd $STARTDIR
   fi
 done
else true ; fi
# Avoid having to add intl to our include paths.
if test -f intl/libintl.h; then
  echo creating libintl.h
  echo '#include "intl/libintl.h"' >libintl.h
fi
],
[
host='${host}'
build='${build}'
target='${target}'
target_alias='${target_alias}'
srcdir='${srcdir}'
subdirs='${subdirs}'
symbolic_link='${symbolic_link}'
program_transform_set='${program_transform_set}'
program_transform_name='${program_transform_name}'
dep_host_xmake_file='${dep_host_xmake_file}'
host_xmake_file='${host_xmake_file}'
dep_tmake_file='${dep_tmake_file}'
tmake_file='${tmake_file}'
thread_file='${thread_file}'
gcc_config_arguments='${gcc_config_arguments}'
gcc_version='${gcc_version}'
gcc_version_full='${gcc_version_full}'
gcc_version_trigger='${gcc_version_trigger}'
local_prefix='${local_prefix}'
build_install_headers_dir='${build_install_headers_dir}'
build_exeext='${build_exeext}'
host_exeext='${host_exeext}'
out_file='${out_file}'
gdb_needs_out_file_path='${gdb_needs_out_file_path}'
SET_MAKE='${SET_MAKE}'
target_list='${target_list}'
target_overrides='${target_overrides}'
host_overrides='${host_overrides}'
cross_defines='${cross_defines}'
cross_overrides='${cross_overrides}'
build_overrides='${build_overrides}'
cpp_install_dir='${cpp_install_dir}'
])