path: root/configure

#!/bin/sh

### WARNING: this file contains embedded tabs.  Do not run untabify on this file.

# Configuration script
# Copyright (C) 1988, 90, 91, 92, 93, 94 Free Software Foundation, Inc.

# This program 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 of the License, or
# (at your option) any later version.
# 
# This program 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 this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

# This file was originally written by K. Richard Pixley.

#
# Shell script to create proper links to machine-dependent files in
# preparation for compilation.
#
# If configure succeeds, it leaves its status in config.status.
# If configure fails after disturbing the status quo, 
#       config.status is removed.
#

export PATH || (echo "OOPS, this isn't sh.  Desperation time.  I will feed myself to sh."; sh $0 $argv; kill $$)

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

#for Test
#remove="echo rm"
#hard_link="echo ln"
#symbolic_link="echo ln -s"

# clear some things potentially inherited from environment.

Makefile=Makefile
Makefile_in=Makefile.in
arguments=
build_alias=
cache_file=
cache_file_option=
configdirs=
exec_prefix=
exec_prefixoption=
fatal=
floating_point=default
gas=default
host_alias=NOHOST
host_makefile_frag=
moveifchange=
norecursion=
other_options=
package_makefile_frag=
prefix=/usr/local
progname=
program_prefix=
program_prefixoption=
program_suffix=
program_suffixoption=
program_transform_name=
program_transform_nameoption=
redirect=">/dev/null"
removing=
site=
site_makefile_frag=
site_option=
srcdir=
srctrigger=
subdirs=
target_alias=NOTARGET
target_makefile_frag=
undefs=NOUNDEFS
version="$Revision$"
x11=default

### we might need to use some other shell than /bin/sh for running subshells
#
config_shell=${CONFIG_SHELL-/bin/sh}

NO_EDIT="This file was generated automatically by configure.  Do not edit."

## this is a little touchy and won't always work, but...
##
## if the argv[0] starts with a slash then it is an absolute name that can (and
## must) be used as is.
##
## otherwise, if argv[0] has no slash in it, we can assume that it is on the
## path.  Since PATH might include "." we also add `pwd` to the end of PATH.
##

progname=$0
# if PWD already has a value, it is probably wrong.
if [ -n "$PWD" ]; then PWD=`pwd`; fi

case "${progname}" in
/*) ;;
*/*) ;;
*)
        PATH=$PATH:${PWD=`pwd`} ; export PATH
        ;;
esac

# Loop over all args

while :
do

# Break out if there are no more args
	case $# in
	0)
		break
		;;
	esac

# Get the first arg, and shuffle
	option=$1
	shift

# Make all options have two hyphens
	orig_option=$option	# Save original for error messages
	case $option in
	--*) ;;
	-*) option=-$option ;;
	esac
		
# Split out the argument for options that take them
	case $option in
	--*=*)
		optarg=`echo $option | sed -e 's/^[^=]*=//'`
		arguments="$arguments $option"
		;;
# These options have mandatory values.  Since we didn't find an = sign,
# the value must be in the next argument
	--b* | --cache* | --ex* | --ho* | --pre* | --program-p* | --program-s* | --program-t* | --si* | --sr* | --ta* | --tm* | --x-*)
		optarg=$1
		shift
		arguments="$arguments $option=$optarg"
		;;
	--*)
		arguments="$arguments $option"
		;;
	esac

# Now, process the options
	case $option in

	--build* | --b*)
		case "$build_alias" in
		"") build_alias=$optarg ;;
		*) echo '***' Can only configure for one build machine at a time.  1>&2
		   fatal=yes
		   ;;
		esac
		;;
	--cache*)
		cache_file=$optarg
		;;
	--disable-*)
		enableopt=`echo ${option} | sed 's:^--disable-:enable_:;s:-:_:g'`
		eval $enableopt=no
		disableoptions="$disableoptions $option"
		;;
	--enable-*)
		case "$option" in
		*=*)	;;
		*)	optarg=yes ;;
		esac

		enableopt=`echo ${option} | sed 's:^--::;s:=.*$::;s:-:_:g'`
		eval $enableopt="$optarg"
		enableoptions="$enableoptions $option"
		;;
	--exec-prefix* | --ex*)
		exec_prefix=$optarg
		exec_prefixoption="--exec-prefix=$optarg"
		;;
	--gas | --g*)
		gas=yes
		;;
	--help | --he*)
		fatal=yes
		;;
	--host* | --ho*)
		case $host_alias in
		NOHOST) host_alias=$optarg ;;
		*) echo '***' Can only configure for one host at a time.  1>&2
		   fatal=yes
		   ;;
		esac
		;;
	--nfp | --nf*)
		floating_point=no
		;;
	--norecursion | --no*)
		norecursion=yes
		;;
	--prefix* | --pre*)
		prefix=$optarg
		prefixoption="--prefix=$optarg"
		;;
	--program-prefix* | --program-p*)
		program_prefix=$optarg
		program_prefixoption="--program-prefix=$optarg"
		;;
	--program-suffix* | --program-s*)
		program_suffix=$optarg
		program_suffixoption="--program-suffix=$optarg"
		;;
	--program-transform-name* | --program-t*)
		# Double any backslashes or dollar signs in the argument
		program_transform_name="${program_transform_name} -e `echo ${optarg} | sed -e 's/\\\\/\\\\\\\\/g' -e 's/\\\$/$$/g'`"
		program_transform_nameoption="${program_transform_nameoption} --program-transform-name='$optarg'"
		;;
	--rm)
		removing=--rm
		;;
	--silent | --sil* | --quiet | --q*)
		redirect=">/dev/null"
		verbose=--silent
		;;
	--site* | --sit*)
		site=$optarg
		site_option="--site=$optarg"
		;;
	--srcdir*/ | --sr*/)
                # Remove trailing slashes.  Otherwise, when the file name gets
                # bolted into an object file as debug info, it has two slashes
                # in it.  Ordinarily this is ok, but emacs takes double slash
                # to mean "forget the first part".
		srcdir=`echo $optarg | sed -e 's:/$::'`
		;;
	--srcdir* | --sr*)
		srcdir=$optarg
		;;
	--target* | --ta*)
		case $target_alias in
		NOTARGET) target_alias=$optarg ;;
		*) echo '***' Can only configure for one target at a time.  1>&2
		   fatal=yes
		   ;;
		esac
		;;
	--tmpdir* | --tm*)
		TMPDIR=$optarg
		tmpdiroption="--tmpdir=$optarg"
		;;
	--verbose | --v | --verb*)
		redirect=
		verbose=--verbose
		;;
	--version | --V | --vers*)
		echo "This is Cygnus Configure version" `echo ${version} | sed 's/[ $:]//g'`
		exit 0
		;;
	--with-*)
		case "$option" in
		*=*)	;;
		*)	optarg=yes ;;
		esac

		withopt=`echo ${option} | sed 's:^--::;s:=.*$::;s:-:_:g'`
		eval $withopt="$optarg"
		withoptions="$withoptions $option"
		;;
	--without-*)
		withopt=`echo ${option} | sed 's:^--::;s:out::;s:-:_:g'`
		eval $withopt=no
		withoutoptions="$withoutoptions $option"
		;;
	--x)	with_x=yes
		withoptions="$withoptions --with-x"
		;;
	--x-i* | --x-l*) other_options="$other_options $orig_option"
		;;
	--*)
		echo "configure: Unrecognized option: \"$orig_option\"; use --help for usage." >&2
		exit 1
		;;
	*)
		case $undefs in
		NOUNDEFS) undefs=$option ;;
		*) echo '***' Can only configure for one host and one target at a time.  1>&2
		   fatal=yes
		   ;;
		esac
		;;
	esac
done

# process host and target

# Do some error checking and defaulting for the host and target type.
# The inputs are:
#    configure --host=HOST --target=TARGET UNDEFS
#
# The rules are:
# 1. You aren't allowed to specify --host, --target, and undefs at the
#    same time.
# 2. Host defaults to undefs.
# 3. If undefs is not specified, then host defaults to the current host,
#    as determined by config.guess.
# 4. Target defaults to undefs.
# 5. If undefs is not specified, then target defaults to host.

case "${fatal}" in
"")
	# Make sure that host, target & undefs aren't all specified at the
	# same time.
	case $host_alias---$target_alias---$undefs in
	NOHOST---*---* | *---NOTARGET---* | *---*---NOUNDEFS)
		;;
	*) echo '***' Can only configure for one host and one target at a time.  1>&2
	   fatal=yes
	   break 2
		;;
	esac

	# Now, do defaulting for host.
	case $host_alias in
	NOHOST)
		case $undefs in
		NOUNDEFS)
			# Neither --host option nor undefs were present.
			# Call config.guess.
			guesssys=`echo ${progname} | sed 's/configure$/config.guess/'`
			if host_alias=`${guesssys}`
			then
				# If the string we are going to use for
				# the target is a prefix of the string
				# we just guessed for the host, then
				# assume we are running native, and force
				# the same string for both target and host.
				case $target_alias in
				NOTARGET) ;;
				*)
					if expr $host_alias : $target_alias >/dev/null
					then
						host_alias=$target_alias
					fi
					;;
				esac
				echo "Configuring for a ${host_alias} host." 1>&2
				arguments="--host=$host_alias $arguments"
			else
				echo 'Config.guess failed to determine the host type.  You need to specify one.' 1>&2
				fatal=yes
			fi
			;;
		*)
			host_alias=$undefs
			arguments="--host=$host_alias $arguments"
			undefs=NOUNDEFS
			;;
		esac
	esac

	# Do defaulting for target.  If --target option isn't present, default
	# to undefs.  If undefs isn't present, default to host.
	case $target_alias in
	NOTARGET)
		case $undefs in
		NOUNDEFS)
			target_alias=$host_alias
			;;
		*)
			target_alias=$undefs
			arguments="--target=$target_alias $arguments"
			;;
		esac
	esac
	;;
*) ;;
esac

if [ -n "${fatal}" -o "${host_alias}" = "help" ] ; then
	exec 1>&2
	echo Usage: configure [OPTIONS] [HOST]
	echo
	echo Options: [defaults in brackets]
	echo ' --prefix=MYDIR		 install into MYDIR [/usr/local]'
	echo ' --exec-prefix=MYDIR	 install host-dependent files into MYDIR [/usr/local]'
	echo ' --help			 print this message [normal config]'
	echo ' --build=BUILD		 configure for building on BUILD [BUILD=HOST]'
	echo ' --host=HOST		 configure for HOST [determined via config.guess]'
	echo ' --norecursion		 configure this directory only [recurse]'
	echo ' --program-prefix=FOO	 prepend FOO to installed program names [""]'
	echo ' --program-suffix=FOO	 append FOO to installed program names [""]'
	echo ' --program-transform-name=P transform installed names by sed pattern P [""]'
	echo ' --site=SITE		 configure with site-specific makefile for SITE'
	echo ' --srcdir=DIR		 find the sources in DIR [. or ..]'
	echo ' --target=TARGET	 configure for TARGET [TARGET=HOST]'
	echo ' --tmpdir=TMPDIR	 create temporary files in TMPDIR [/tmp]'
	echo ' --nfp			 configure for software floating point [hard float]'
	echo ' --with-FOO, --with-FOO=BAR package FOO is available (parameter BAR)'
	echo ' --without-FOO		 package FOO is NOT available'
	echo ' --enable-FOO, --enable-FOO=BAR include feature FOO (parameter BAR)'
	echo ' --disable-FOO		 do not include feature FOO'
	echo
	echo 'Where HOST and TARGET are something like "sparc-sunos", "mips-sgi-irix5", etc.'
	echo
	if [ -r config.status ] ; then
		cat config.status
	fi

	exit 1
fi

configsub=`echo ${progname} | sed 's/configure$/config.sub/'`
moveifchange=`echo ${progname} | sed 's/configure$/move-if-change/'`

# this is a hack.  sun4 must always be a valid host alias or this will fail.
if ${configsub} sun4 >/dev/null 2>&1 ; then
        true
else
        echo '***' cannot find config.sub.  1>&2
        exit 1
fi

touch config.junk
if ${moveifchange} config.junk config.trash ; then
        true
else
        echo '***' cannot find move-if-change.  1>&2
        exit 1
fi
rm -f config.junk config.trash

case "${srcdir}" in
"")
        if [ -r configure.in ] ; then
                srcdir=.
        else
                if [ -r ${progname}.in ] ; then
                        srcdir=`echo ${progname} | sed 's:/configure$::'`
                else
                        echo '***' "Can't find configure.in.  Try using --srcdir=some_dir"  1>&2
                        exit 1
                fi
        fi
        ;;
*)
	# Set srcdir to "." if that's what it is.
	# This is important for multilib support.
	if [ ! -d ${srcdir} ] ; then
		echo "Invalid source directory ${srcdir}" >&2
		exit 1
	fi
	pwd=`pwd`
	srcpwd=`cd ${srcdir} ; pwd`
	if [ "${pwd}" = "${srcpwd}" ] ; then
		srcdir=.
	fi
esac

### warn about some conflicting configurations.

case "${srcdir}" in
".") ;;
*)
        if [ -f ${srcdir}/config.status ] ; then
                echo '***' Cannot configure here in \"${PWD=`pwd`}\" when \"${srcdir}\" is currently configured. 1>&2
                exit 1
        fi
esac

# default exec_prefix
case "${exec_prefixoption}" in
"") exec_prefix="\$(prefix)" ;;
*) ;;
esac

### break up ${srcdir}/configure.in.
case "`grep '^# per\-host:' ${srcdir}/configure.in`" in
"")
        echo '***' ${srcdir}/configure.in has no \"per-host:\" line. 1>&2
	# Check for a directory that's been converted to use autoconf since
	# it was last configured.
	if grep AC_OUTPUT ${srcdir}/configure.in >/dev/null ; then
	  echo '***' Hmm, looks like this directory has been autoconfiscated. 1>&2
	  if [ -r ${srcdir}/configure ] ; then
	    echo '***' Running the local configure script. 1>&2
	    case "${cache_file}" in
	    "") cache_file_option= ;;
	    *)  cache_file_option="--cache-file=${cache_file}" ;;
	    esac
	    srcdiroption="--srcdir=${srcdir}"
	    case "${build_alias}" in
	    "") buildopt= ;;
	    *)  buildopt="--build=${build_alias}" ;;
	    esac
	    eval exec ${config_shell} ${srcdir}/configure ${verbose} \
		${buildopt} --host=${host_alias} --target=${target_alias} \
		${prefixoption} ${tmpdiroption} ${exec_prefixoption} \
		${srcdiroption} \
		${program_prefixoption} ${program_suffixoption} \
		${program_transform_nameoption} ${site_option} \
		${withoptions} ${withoutoptions} \
		${enableoptions} ${disableoptions} \
		${cache_file_option} ${removing} ${other_options} ${redirect}
	  else
	    echo '***' There is no configure script present though. 1>&2
	  fi
	fi
        exit 1
        ;;
*) ;;
esac

case "`grep '^# per\-target:' ${srcdir}/configure.in`" in
"")
        echo '***' ${srcdir}/configure.in has no \"per-target:\" line. 1>&2
        exit 1
        ;;
*) ;;
esac

case "${TMPDIR}" in
"") TMPDIR=/tmp ; export TMPDIR ;;
*) ;;
esac

# keep this filename short for &%*%$*# 14 char file names
tmpfile=${TMPDIR}/cONf$$
# Note that under many versions of sh a trap handler for 0 will *override* any
# exit status you explicitly specify!  At this point, the only non-error exit
# is at the end of the script; these actions are duplicated there, minus
# the "exit 1".  Don't use "exit 0" anywhere after this without resetting the
# trap handler, or you'll lose.
trap "rm -f Makefile.tem ${tmpfile}.com ${tmpfile}.tgt ${tmpfile}.hst ${tmpfile}.pos; exit 1" 0 1 2 15

# split ${srcdir}/configure.in into common, per-host, per-target,
# and post-target parts.  Post-target is optional.
sed -e '/^# per\-host:/,$d' ${srcdir}/configure.in > ${tmpfile}.com
sed -e '1,/^# per\-host:/d' -e '/^# per\-target:/,$d' ${srcdir}/configure.in > ${tmpfile}.hst
if grep '^# post-target:' ${srcdir}/configure.in >/dev/null ; then
  sed -e '1,/^# per\-target:/d' -e '/^# post\-target:/,$d' ${srcdir}/configure.in > ${tmpfile}.tgt
  sed -e '1,/^# post\-target:/d' ${srcdir}/configure.in > ${tmpfile}.pos
else
  sed -e '1,/^# per\-target:/d' ${srcdir}/configure.in > ${tmpfile}.tgt
  echo >${tmpfile}.pos
fi

### do common part of configure.in

. ${tmpfile}.com

# some sanity checks on configure.in
case "${srctrigger}" in
"")
        echo '***' srctrigger not set in ${PWD=`pwd`}/configure.in.  1>&2
        exit 1
        ;;
*) ;;
esac

case "${build_alias}" in
"")
	if result=`${config_shell} ${configsub} ${host_alias}` ; then
	    build_cpu=`echo $result | sed 's/^\(.*\)-\(.*\)-\(.*\)$/\1/'`
	    build_vendor=`echo $result | sed 's/^\(.*\)-\(.*\)-\(.*\)$/\2/'`
	    build_os=`echo $result | sed 's/^\(.*\)-\(.*\)-\(.*\)$/\3/'`
	    build=${build_cpu}-${build_vendor}-${build_os}
	    build_alias=${host_alias}
	fi
	;;
*)
	if result=`${config_shell} ${configsub} ${build_alias}` ; then
	    buildopt="--build=${build_alias}"
	    build_cpu=`echo $result | sed 's/^\(.*\)-\(.*\)-\(.*\)$/\1/'`
	    build_vendor=`echo $result | sed 's/^\(.*\)-\(.*\)-\(.*\)$/\2/'`
	    build_os=`echo $result | sed 's/^\(.*\)-\(.*\)-\(.*\)$/\3/'`
	    build=${build_cpu}-${build_vendor}-${build_os}
	else
	    echo "Unrecognized build system name ${build_alias}." 1>&2
	    exit 1
	fi
	;;
esac

if result=`${config_shell} ${configsub} ${host_alias}` ; then
    true
else
    echo "Unrecognized host system name ${host_alias}." 1>&2
    exit 1
fi
host_cpu=`echo $result | sed 's/^\(.*\)-\(.*\)-\(.*\)$/\1/'`
host_vendor=`echo $result | sed 's/^\(.*\)-\(.*\)-\(.*\)$/\2/'`
host_os=`echo $result | sed 's/^\(.*\)-\(.*\)-\(.*\)$/\3/'`
host=${host_cpu}-${host_vendor}-${host_os}

. ${tmpfile}.hst

if result=`${config_shell} ${configsub} ${target_alias}` ; then
    true
else
    echo "Unrecognized target system name ${target_alias}." 1>&2
    exit 1
fi
target_cpu=`echo $result | sed 's/^\(.*\)-\(.*\)-\(.*\)$/\1/'`
target_vendor=`echo $result | sed 's/^\(.*\)-\(.*\)-\(.*\)$/\2/'`
target_os=`echo $result | sed 's/^\(.*\)-\(.*\)-\(.*\)$/\3/'`
target=${target_cpu}-${target_vendor}-${target_os}

. ${tmpfile}.tgt

# Find the source files, if location was not specified.
case "${srcdir}" in
"")
        srcdirdefaulted=1
        srcdir=.
        if [ ! -r ${srctrigger} ] ; then
                srcdir=..
        fi
        ;;
*) ;;
esac

if [ ! -r ${srcdir}/${srctrigger} ] ; then
        case "${srcdirdefaulted}" in
        "") echo '***' "${progname}: Can't find ${srcname} sources in ${PWD=`pwd`}/${srcdir}" 1>&2 ;;
        *)  echo '***' "${progname}: Can't find ${srcname} sources in ${PWD=`pwd`}/. or ${PWD=`pwd`}/.." 1>&2 ;;
        esac

        echo '***' \(At least ${srctrigger} is missing.\) 1>&2
        exit 1
fi

# Some systems (e.g., one of the i386-aix systems the gas testers are
# using) don't handle "\$" correctly, so don't use it here.
tooldir='$(exec_prefix)'/${target_alias}

if [ "${host_alias}" != "${target_alias}" ] ; then
    if [ "${program_prefixoption}" = "" ] ; then
        if [ "${program_suffixoption}" = "" ] ; then 
            if [ "${program_transform_nameoption}" = "" ] ; then
                program_prefix=${target_alias}- ;
            fi
        fi
    fi
fi

# Merge program_prefix and program_suffix onto program_transform_name.
# (program_suffix used to use $, but it's hard to preserve $ through both
# make and sh.)
if [ "${program_suffix}" != "" ] ; then
    program_transform_name="-e s,\\\\(.*\\\\),\\\\1${program_suffix}, ${program_transform_name}"
fi

if [ "${program_prefix}" != "" ] ; then
    program_transform_name="-e s,^,${program_prefix}, ${program_transform_name}"
fi

# If CC and CXX are not set in the environment, and the Makefile
# exists, try to extract them from it.  This is to handle running
# ./config.status by hand.
if [ -z "${CC}" -a -r Makefile ]; then
  sed -n -e ':loop
/\\$/ N
/\\$/ b loop
s/\\\n//g
/^CC[ 	]*=/ s/CC[ 	]*=[ 	]*\(.*\)/\1/p' < Makefile > Makefile.cc
  CC=`tail -1 Makefile.cc`
  rm -f Makefile.cc
fi

if [ -z "${CXX}" -a -r Makefile ]; then
  sed -n -e ':loop
/\\$/ N
/\\$/ b loop
s/\\\n//g
/^CXX[ 	]*=/ s/CXX[ 	]*=[ 	]*\(.*\)/\1/p' < Makefile > Makefile.cc
  CXX=`tail -1 Makefile.cc`
  rm -f Makefile.cc
fi

if [ "${build}" != "${host}" ]; then
  # If we are doing a Canadian Cross, in which the host and build systems
  # are not the same, we set reasonable default values for the tools.

  tools="AR AR_FOR_TARGET AS AS_FOR_TARGET BISON CC_FOR_BUILD"
  tools="${tools} CC_FOR_TARGET CXX_FOR_TARGET HOST_PREFIX"
  tools="${tools} HOST_PREFIX_1 LD LD_FOR_TARGET LEX MAKEINFO NM"
  tools="${tools} NM_FOR_TARGET RANLIB RANLIB_FOR_TARGET"

  for var in ${tools}; do
    if [ -z "`eval 'echo $'"${var}"`" -a -r Makefile ]; then
      sed -n -e ':loop
/\\$/ N
/\\$/ b loop
s/\\\n//g
/^'"${var}"'[ 	]*=/ s/'"${var}"'[ 	]*=[ 	]*\(.*\)/\1/p' \
	< Makefile > Makefile.v
      t=`tail -1 Makefile.v`
      if [ -n "${t}" ]; then
	eval "${var}='${t}'"
      fi
      rm -f Makefile.v
    fi
  done

  AR=${AR-${host_alias}-ar}
  AR_FOR_TARGET=${AR_FOR_TARGET-${target_alias}-ar}
  AS=${AS-${host_alias}-as}
  AS_FOR_TARGET=${AS_FOR_TARGET-${target_alias}-as}
  CC=${CC-${host_alias}-gcc}
  CXX=${CXX-${host_alias}-gcc}
  CC_FOR_BUILD=${CC_FOR_BUILD-gcc}
  CC_FOR_TARGET=${CC_FOR_TARGET-${target_alias}-gcc}
  CXX_FOR_TARGET=${CXX_FOR_TARGET-${target_alias}-gcc}
  HOST_PREFIX=${build_alias}-
  HOST_PREFIX_1=${build_alias}-
  LD=${LD-${host_alias}-ld}
  LD_FOR_TARGET=${LD_FOR_TARGET-${target_alias}-ld}
  MAKEINFO=${MAKEINFO-makeinfo}
  NM=${NM-${host_alias}-nm}
  NM_FOR_TARGET=${NM_FOR_TARGET-${target_alias}-nm}
  RANLIB=${RANLIB-${host_alias}-ranlib}
  RANLIB_FOR_TARGET=${RANLIB_FOR_TARGET-${target_alias}-ranlib}

  if [ -z "${BISON}" ]; then
    IFS="${IFS= 	}"; save_ifs="$IFS"; IFS="${IFS}:"
    for dir in $PATH; do
      test -z "$dir" && dir=.
      if test -f $dir/byacc; then
	BISON=byacc
	break
      fi
      if test -f $dir/bison; then
	BISON=bison
	break
      fi
      if test -f $dir/yacc; then
	BISON=yacc
	break
      fi
    done
    IFS="$save_ifs"
    BISON=${BISON-bison}
  fi

  if [ -z "${LEX}" ]; then
    IFS="${IFS= 	}"; save_ifs="$IFS"; IFS="${IFS}:"
    for dir in $PATH; do
      test -z "$dir" && dir=.
      if test -f $dir/flex; then
	LEX=flex
	break
      fi
      if test -f $dir/lex; then
	LEX=lex
	break
      fi
    done
    IFS="$save_ifs"
    LEX=${LEX-flex}
  fi

  # Export variables which autoconf might try to set.
  export AS
  export AR
  export CC_FOR_BUILD
  export LD
  export NM
  export RANLIB
else
  # If CC is still not set, try to get gcc.
  if [ -z "${CC}" ]; then
    IFS="${IFS= 	}"; save_ifs="$IFS"; IFS="${IFS}:"
    for dir in $PATH; do
      test -z "$dir" && dir=.
      if test -f $dir/gcc; then
	CC="gcc -O2"
	break
      fi
    done
    IFS="$save_ifs"
    CC=${CC-cc}
  fi

  CXX=${CXX-"gcc"}
fi

export CC
export CXX

for subdir in . ${subdirs} ; do

    # ${subdir} is relative path from . to the directory we're currently
    # configuring.
    # ${invsubdir} is inverse of ${subdir), *with* trailing /, if needed.
    invsubdir=`echo ${subdir}/ | sed -e 's|\./||g' -e 's|[^/]*/|../|g'`

    ### figure out what to do with srcdir
    case "${srcdir}" in
        ".")  # no -srcdir option.  We're building in place.
                makesrcdir=. ;;
        /*) # absolute path
                makesrcdir=`echo ${srcdir}/${subdir} | sed -e 's|/\.$||'`
                ;;
        *) # otherwise relative
                case "${subdir}" in
                .) makesrcdir=${srcdir} ;;
                *) makesrcdir=${invsubdir}${srcdir}/${subdir} ;;
                esac
                ;;
    esac

    if [ "${subdir}/" != "./" ] ; then
        Makefile=${subdir}/Makefile
    fi

    if [ ! -d ${subdir} ] ; then
        if mkdir ${subdir} ; then
                true
        else
                echo '***' "${progname}: could not make ${PWD=`pwd`}/${subdir}" 1>&2
                exit 1
        fi
    fi

    case "${removing}" in
    "")
        case "${subdir}" in
        .) ;;
        *) eval echo Building in ${subdir} ${redirect} ;;
        esac

        # FIXME Should this be done recursively ??? (Useful for e.g. gdbtest)
        # Set up the list of links to be made.
        # ${links} is the list of link names, and ${files} is the list of names to link to.

        # Make the links.
        configlinks="${links}"
        if [ -r ${subdir}/config.status ] ; then
                mv -f ${subdir}/config.status ${subdir}/config.back
        fi
        while [ -n "${files}" ] ; do
                # set file to car of files, files to cdr of files
                set ${files}; file=$1; shift; files=$*
                set ${links}; link=$1; shift; links=$*

                if [ ! -r ${srcdir}/${file} ] ; then
                        echo '***' "${progname}: cannot create a link \"${link}\"," 1>&2
                        echo '***' "since the file \"${srcdir}/${file}\" does not exist." 1>&2
                        exit 1
                fi

                ${remove} -f ${link}
		# Make a symlink if possible, otherwise try a hard link
		if ${symbolic_link} ${srcdir}/${file} ${link} >/dev/null 2>&1 ; then
			true
		else
			# We need to re-remove the file because Lynx leaves a 
			# very strange directory there when it fails an NFS symlink.
			${remove} -r -f ${link}
			${hard_link} ${srcdir}/${file} ${link}
		fi
                if [ ! -r ${link} ] ; then
                        echo '***' "${progname}: unable to link \"${link}\" to \"${srcdir}/${file}\"." 1>&2
                        exit 1
                fi

                echo "Linked \"${link}\" to \"${srcdir}/${file}\"."
        done

        # Create a .gdbinit file which runs the one in srcdir
        # and tells GDB to look there for source files.

        if [ -r ${srcdir}/${subdir}/.gdbinit ] ; then
                case ${srcdir} in
                .) ;;
                *) cat > ${subdir}/.gdbinit <<EOF
# ${NO_EDIT}
dir ${makesrcdir}
dir .
source ${makesrcdir}/.gdbinit
EOF
                        ;;
                esac
        fi

        # Install a makefile, and make it set VPATH
        # if necessary so that the sources are found.
        # Also change its value of srcdir.
        # NOTE: Makefile generation constitutes the majority of the time in configure.  Hence, this section has
        # been somewhat optimized and is perhaps a bit twisty.

        # code is order so as to try to sed the smallest input files we know.

        # the four makefile fragments MUST end up in the resulting Makefile in this order: 
        # package, target, host, and site.  so do these separately because I don't trust the
        #  order of sed -e expressions.

        if [ -f ${srcdir}/${subdir}/${Makefile_in} ] ; then

            # Conditionalize for this site from "Makefile.in" (or whatever it's called) into Makefile.tem
            rm -f ${subdir}/Makefile.tem
              case "${site}" in
              "") cp ${srcdir}/${subdir}/${Makefile_in} ${subdir}/Makefile.tem ;;
              *)
                      site_makefile_frag=${srcdir}/config/ms-${site}

                      if [ -f ${site_makefile_frag} ] ; then
                              sed -e "/^####/  r ${site_makefile_frag}" ${srcdir}/${subdir}/${Makefile_in} \
                                      > ${subdir}/Makefile.tem
                      else
                              cp ${srcdir}/${subdir}/${Makefile_in} ${subdir}/Makefile.tem
                              site_makefile_frag=
                      fi
                      ;;
            esac
            # working copy now in ${subdir}/Makefile.tem

            # Conditionalize the makefile for this host.
            rm -f ${Makefile}
            case "${host_makefile_frag}" in
              "") mv ${subdir}/Makefile.tem ${Makefile} ;;
              *)
                      if [ ! -f ${host_makefile_frag} ] ; then
                              host_makefile_frag=${srcdir}/${host_makefile_frag}
                      fi
                      if [ -f ${host_makefile_frag} ] ; then
                              sed -e "/^####/  r ${host_makefile_frag}" ${subdir}/Makefile.tem > ${Makefile}
                      else
                              echo '***' Expected host makefile fragment \"${host_makefile_frag}\" 1>&2
                              echo '***' is missing in ${PWD=`pwd`}. 1>&2
                              mv ${subdir}/Makefile.tem ${Makefile}
                      fi
            esac
            # working copy now in ${Makefile}

            # Conditionalize the makefile for this target.
            rm -f ${subdir}/Makefile.tem
            case "${target_makefile_frag}" in
              "") mv ${Makefile} ${subdir}/Makefile.tem ;;
              *)
                      if [ ! -f ${target_makefile_frag} ] ; then
                              target_makefile_frag=${srcdir}/${target_makefile_frag}
                      fi
                      if [ -f ${target_makefile_frag} ] ; then
                              sed -e "/^####/  r ${target_makefile_frag}" ${Makefile} > ${subdir}/Makefile.tem
                      else
                              mv ${Makefile} ${subdir}/Makefile.tem
                              target_makefile_frag=
                      fi
                      ;;
            esac
            # real copy now in ${subdir}/Makefile.tem

            # Conditionalize the makefile for this package.
            rm -f ${Makefile}
            case "${package_makefile_frag}" in
              "") mv ${subdir}/Makefile.tem ${Makefile} ;;
              *)
                      if [ ! -f ${package_makefile_frag} ] ; then
                              package_makefile_frag=${srcdir}/${package_makefile_frag}
                      fi
                      if [ -f ${package_makefile_frag} ] ; then
                              sed -e "/^####/  r ${package_makefile_frag}" ${subdir}/Makefile.tem > ${Makefile}
			      rm -f ${subdir}/Makefile.tem
                      else
                              echo '***' Expected package makefile fragment \"${package_makefile_frag}\" 1>&2
                              echo '***' is missing in ${PWD=`pwd`}. 1>&2
                              mv ${subdir}/Makefile.tem ${Makefile}
                      fi
            esac
            # working copy now in ${Makefile}

            mv ${Makefile} ${subdir}/Makefile.tem

            # real copy now in ${subdir}/Makefile.tem

            # prepend warning about editting, and a bunch of variables.
            rm -f ${Makefile}
            cat > ${Makefile} <<EOF
# ${NO_EDIT}
VPATH = ${makesrcdir}
links = ${configlinks}
host_alias = ${host_alias}
host_cpu = ${host_cpu}
host_vendor = ${host_vendor}
host_os = ${host_os}
host_canonical = ${host_cpu}-${host_vendor}-${host_os}
target_alias = ${target_alias}
target_cpu = ${target_cpu}
target_vendor = ${target_vendor}
target_os = ${target_os}
target_canonical = ${target_cpu}-${target_vendor}-${target_os}
EOF
	    case "${build}" in
	      "") ;;
	      *)  cat >> ${Makefile} << EOF
build_alias = ${build_alias}
build_cpu = ${build_cpu}
build_vendor = ${build_vendor}
build_os = ${build_os}
build_canonical = ${build_cpu}-${build_vendor}-${build_os}
EOF
	    esac

            case "${package_makefile_frag}" in
              "") ;;
              /*) echo package_makefile_frag = ${package_makefile_frag} >>${Makefile} ;;
              *)  echo package_makefile_frag = ${invsubdir}${package_makefile_frag} >>${Makefile} ;;
            esac

            case "${target_makefile_frag}" in
              "") ;;
              /*) echo target_makefile_frag = ${target_makefile_frag} >>${Makefile} ;;
              *)  echo target_makefile_frag = ${invsubdir}${target_makefile_frag} >>${Makefile} ;;
            esac

            case "${host_makefile_frag}" in
              "") ;;
              /*) echo host_makefile_frag = ${host_makefile_frag} >>${Makefile} ;;
              *)  echo host_makefile_frag = ${invsubdir}${host_makefile_frag} >>${Makefile} ;;
            esac

            if [ "${site_makefile_frag}" != "" ] ; then
                echo site_makefile_frag = ${invsubdir}${site_makefile_frag} >>${Makefile}
            fi 

            # reset prefix, exec_prefix, srcdir, SUBDIRS, NONSUBDIRS,
            # remove any form feeds.
            if [ -z "${subdirs}" ]; then
                rm -f ${subdir}/Makefile.tem2
                sed -e "s:^SUBDIRS[ 	]*=.*$:SUBDIRS = ${configdirs}:" \
                    -e "s:^NONSUBDIRS[ 	]*=.*$:NONSUBDIRS = ${noconfigdirs}:" \
                    ${subdir}/Makefile.tem > ${subdir}/Makefile.tem2
                rm -f ${subdir}/Makefile.tem
                mv ${subdir}/Makefile.tem2 ${subdir}/Makefile.tem
            fi
            sed -e "s:^prefix[ 	]*=.*$:prefix = ${prefix}:" \
                    -e "s:^exec_prefix[ 	]*=.*$:exec_prefix = ${exec_prefix}:" \
		    -e "/^CC[ 	]*=/{
			:loop1
			/\\\\$/ N
			/\\\\$/ b loop1
			s/\\\\\\n//g
			s%^CC[ 	]*=.*$%CC = ${CC}%
			}" \
		    -e "/^CXX[ 	]*=/{
			:loop2
			/\\\\$/ N
			/\\\\$/ b loop2
			s/\\\\\\n//g
			s%^CXX[ 	]*=.*$%CXX = ${CXX}%
			}" \
		    -e "s:^SHELL[	 ]*=.*$:SHELL = ${config_shell}:" \
                    -e "s:^srcdir[ 	]*=.*$:srcdir = ${makesrcdir}:" \
                    -e "s///" \
                    -e "s:^program_prefix[ 	]*=.*$:program_prefix = ${program_prefix}:" \
                    -e "s:^program_suffix[ 	]*=.*$:program_suffix = ${program_suffix}:" \
                    -e "s:^program_transform_name[ 	]*=.*$:program_transform_name = ${program_transform_name}:" \
                    -e "s:^tooldir[ 	]*=.*$:tooldir = ${tooldir}:" \
                    ${subdir}/Makefile.tem >> ${Makefile}

	    # If this is a Canadian Cross, preset the values of many more
	    # tools.
	    if [ "${build}" != "${host}" ]; then
		for var in ${tools}; do
		    val=`eval 'echo $'"${var}"`
		    sed -e "/^${var}[ 	]*=/{
			   :loop1
			   /\\\\$/ N
			   /\\\\$/ b loop1
			   s/\\\\\\n//g
			   s%^${var}[ 	]*=.*$%${var} = ${val}%
			   }" ${Makefile} > ${Makefile}.tem
		    mv -f ${Makefile}.tem ${Makefile}
		done
	    fi

            # final copy now in ${Makefile}

        else
           echo "No Makefile.in found in ${srcdir}/${subdir}, unable to configure" 1>&2
        fi

        rm -f ${subdir}/Makefile.tem

        case "${host_makefile_frag}" in
        "") using= ;;
        *) using="and \"${host_makefile_frag}\"" ;;
        esac

        case "${target_makefile_frag}" in
        "") ;;
        *) using="${using} and \"${target_makefile_frag}\"" ;;
        esac

        case "${site_makefile_frag}" in
        "") ;;
        *) using="${using} and \"${site_makefile_frag}\"" ;;
        esac

        newusing=`echo "${using}" | sed 's/and/using/'`
        using=${newusing}
        echo "Created \"${Makefile}\" in" ${PWD=`pwd`} ${using}

        . ${tmpfile}.pos

        # describe the chosen configuration in config.status.
        # Make that file a shellscript which will reestablish
        # the same configuration.  Used in Makefiles to rebuild
        # Makefiles.

        case "${norecursion}" in
        "") arguments="${arguments} --norecursion" ;;
        *) ;;
        esac

        if [ ${subdir} = . ] ; then
            echo "#!/bin/sh
# ${NO_EDIT}
# This directory was configured as follows:
${progname}" ${arguments}  "
# ${using}" > ${subdir}/config.new
        else
            echo "#!/bin/sh
# ${NO_EDIT}
# This directory was configured as follows:
cd ${invsubdir}
${progname}" ${arguments}  "
# ${using}" > ${subdir}/config.new
        fi
        chmod a+x ${subdir}/config.new
        if [ -r ${subdir}/config.back ] ; then
                mv -f ${subdir}/config.back ${subdir}/config.status
        fi
        ${moveifchange} ${subdir}/config.new ${subdir}/config.status
        ;;

    *)  rm -f ${Makefile} ${subdir}/config.status ${links} ;;
    esac
done

# If there are subdirectories, then recur. 
if [ -z "${norecursion}" -a -n "${configdirs}" ] ; then 
        for configdir in ${configdirs} ; do

                if [ -d ${srcdir}/${configdir} ] ; then
                        eval echo Configuring ${configdir}... ${redirect}
                        case "${srcdir}" in
                        ".") ;;
                        *)
                                if [ ! -d ./${configdir} ] ; then
                                        if mkdir ./${configdir} ; then
                                                true
                                        else
                                                echo '***' "${progname}: could not make ${PWD=`pwd`}/${configdir}" 1>&2
                                                exit 1
                                        fi
                                fi
                                ;;
                        esac

                        POPDIR=${PWD=`pwd`}
                        cd ${configdir} 

### figure out what to do with srcdir
                        case "${srcdir}" in
                        ".") newsrcdir=${srcdir} ;; # no -srcdir option.  We're building in place.
                        /*) # absolute path
                                newsrcdir=${srcdir}/${configdir}
                                srcdiroption="--srcdir=${newsrcdir}"
                                ;;
                        *) # otherwise relative
                                newsrcdir=../${srcdir}/${configdir}
                                srcdiroption="--srcdir=${newsrcdir}"
                                ;;
                        esac

			# Handle --cache-file=../XXX
			case "${cache_file}" in
			"") # empty
				;;
			/*) # absolute path
				cache_file_option="--cache-file=${cache_file}"
				;;
			*) # relative path
				cache_file_option="--cache-file=../${cache_file}"
				;;
			esac

### check for guested configure, otherwise fix possibly relative progname
                        if [ -f ${newsrcdir}/configure ] ; then
                                recprog=${newsrcdir}/configure
                        elif [ -f ${newsrcdir}/configure.in ] ; then
                                case "${progname}" in
                                /*)     recprog=${progname} ;;
                                *)      recprog=../${progname} ;;
                                esac
			else
				eval echo No configuration information in ${configdir} ${redirect}
				recprog=
                        fi

### The recursion line is here.
			if [ ! -z "${recprog}" ] ; then
	                        if eval ${config_shell} ${recprog} ${verbose} ${buildopt} --host=${host_alias} --target=${target_alias} \
        	                        ${prefixoption} ${tmpdiroption} ${exec_prefixoption} \
                	                ${srcdiroption} ${program_prefixoption} ${program_suffixoption} ${program_transform_nameoption} ${site_option} ${withoptions} ${withoutoptions} ${enableoptions} ${disableoptions} ${cache_file_option} ${removing} ${other_options} ${redirect} ; then
	                                true
        	                else
					echo Configure in `pwd` failed, exiting. 1>&2
                	                exit 1
                        	fi
			fi

                        cd ${POPDIR}
                fi
        done
fi

# Perform the same cleanup as the trap handler, minus the "exit 1" of course,
# and reset the trap handler.
rm -f ${tmpfile}.com ${tmpfile}.tgt ${tmpfile}.hst ${tmpfile}.pos
trap 0

exit 0

#
# Local Variables:
# fill-column: 131
# End:
#

# end of configure