path: root/configure

#!/bin/sh

# Configuration script
#   Copyright (C) 1988, 1990, 1991, 1992 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., 675 Mass Ave, Cambridge, MA 02139, USA.  */

# Please email any bugs, comments, and/or additions to this file to:
# configure@cygnus.com

# This file was 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=$*
configdirs=
exec_prefix=
exec_prefixoption=
fatal=
floating_point=default
gas=default
host_alias=
host_makefile_frag=
next_host=
next_prefix=
next_site=
next_srcdir=
next_target=
moveifchange=
next_tmpdir=
norecursion=
removing=
prefix=/usr/local
progname=
program_prefix=
program_prefix_option=
silent=
site=
site_option=
site_makefile_frag=
srcdir=
srctrigger=
subdirs=
target_alias=
target_makefile_frag=
undefinedargs=
verbose=
version="$Revision$"
x11=default

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.
##

PWD=`pwd`
progname=$0

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

for arg in $*;
do
	# handle things that might have args following as separate words
	if [ -n "${next_prefix}" ] ; then prefix=${arg} ; prefixoption="-prefix=${prefix}" ; next_prefix=
	elif [ -n "${next_exec_prefix}" ] ; then
		exec_prefix=${arg}
		exec_prefixoption="-exec_prefix=${exec_prefix}"
		next_exec_prefix=
	elif [ -n "${next_site}" ] ; then site=${arg} ; site_option=-site=${site} ; next_site=
	# remove any possible trailing slash from srcdir.  See note below.
	elif [ -n "${next_srcdir}" ] ; then srcdir=`echo ${arg} | sed -e 's:/$::'` ; next_srcdir=
	elif [ -n "${next_program_prefix}" ] ; then
		program_prefix=${arg}
		program_prefixoption="-program_prefix=${program_prefix}"
		next_program_prefix=
	elif [ -n "${next_target}" ] ; then
		next_target=
		case "${target_alias}" in
		"")
			target_alias="${arg}"
			;;
		*)
			echo '***' Can only configure for one target at a time.  1>&2
			fatal=yes
			;;
		esac
	elif [ -n "${next_tmpdir}" ] ; then
		next_tmpdir=
		tmpdiroption="--tmpdir=${arg}"
		TMPDIR=${arg}

	else
		case ${arg} in
		-exec_prefix=* | --exec_prefix=* | --exec_prefi=* | --exec_pref=* | --exec_pre=* | --exec_pr=* | --exec_p=* | --exec_=* | --exec=* | --exe=* | --ex=* | --e=*)
			exec_prefix=`echo ${arg} | sed 's/^[-a-z_]*=//'`
			exec_prefixoption=${arg}
			;;
		-exec_prefix | --exec_prefix | --exec_prefi | --exec_pref | --exec_pre | --exec_pr | --exec_p | --exec_ | --exec | --exe | --ex | --e)
			next_exec_prefix=yes
			;;
		-gas | --g*)
			gas=yes
			;;
		-help | --he*)
			fatal=true
			;;
		-host=* | --host=* | --hos=* | --ho=*)
			case "${host_alias}" in
			"")
				host_alias="`echo ${arg} | sed 's/^[-a-z]*=//'`"
				;;
			*)
				echo '***' Can only configure for one host at a time.  1>&2
				fatal=yes
				;;
			esac
			;;
		-nfp | --nf*)
			floating_point=no
			;;
		-norecursion | --no*)
			norecursion=true
			;;
		-prefix=* | --prefix=* | --prefi=* | --pref=* | --pre=*)
			prefix=`echo ${arg} | sed 's/^[-a-z]*=//'`
			prefixoption=${arg}
			;;
		-prefix | --prefix | --prefi | --pref | --pre)
			next_prefix=yes
			;;
		-rm | --rm) removing=${arg} ;;
		-program_prefix=* | --program_prefix=* | --program_prefi=* | --program_pref=* | --program_pre=* | --program_pr=* | --program_p=* | --program_=* | --program=* | --progra=* | --progr=* | --prog=* | --pro=*)
			program_prefix=`echo ${arg} | sed 's/^[-a-z]*=//'`
			program_prefixoption=${arg}
			;;
		-program_prefix | --program_prefix | --program_prefi | --program_pref | --program_pre | --program_pr | --program_p | --program_ | --program | --progra | --progr | --prog | --pro)
			next_program_prefix=yes
			;;
		-s | -silent | --silent | --silen | --sile | --sil)
			silent=true
			arguments=`echo ${arguments} | sed "s:${arg}::"`
			;;
		-site=* | --site=* | --sit=* | --si=*)
			site_option=${arg}
			site=`echo ${arg} | sed 's/^[-a-z]*=//'`
			;;
		-site | --site | --sit)
			next_site=yes
			;;
		# 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=* | --srcdir=* | --srcdi=* | --srcd=* | --src=* | --sr=*)
			srcdir=`echo ${arg} | sed 's/^[-a-z]*=//' | sed -e 's:/$::'`
			;;
		-srcdir | --srcdir | --srcdi | --srcd | --src | --sr)
			next_srcdir=yes
			;;
		-target=* | --target=* | --targe=* | --targ=* | --tar=* | --ta=*)
			case "${target_alias}" in
			"") target_alias="`echo ${arg} | sed 's/^[-a-z]*=//'`" ;;
			*)
				echo '***' Can only configure for one target at a time.  1>&2
				fatal=yes
				;;
			esac
			;;
		-target | --target | --targe | --targ | --tar | --ta)
			next_target=yes
			;;
		-tmpdir=* | --tmpdir=* | --tmpdi=* | --tmpd=* | --tmp=* | --tm=*)
			tmpdiroption=${arg}
			TMPDIR=`echo ${arg} | sed 's/^[-a-z]*=//'`
			;;
		-tmpdir | --tmpdir | --tmpdi | --tmpd | --tmp | --tm)
			next_tmpdir=yes
			;;
		-v | -verbose | --v)
			verbose=${arg}
			;;
		-version | -V | --version | --V)
			echo "This is Cygnus Configure version" `echo ${version} | sed 's/[ $:]//g'`
			exit 0
			;;
		-x | --x) ;;
		-* | --*)
			(echo ;
			echo "Unrecognized option: \"${arg}\"". ;
			echo) 1>&2
			fatal=true
			;;
		*)
			case "${undefs}" in
			"")
				undefs="${arg}"
				;;
			*)
				echo '***' Can only configure for one host and one target at a time.  1>&2
				fatal=yes
				;;
			esac
			;;
		esac
	fi
done

# process host and target
case "${fatal}" in
"")
#	# Complain if an arg is missing
#	if [ -z "${host_alias}" ] ; then
#		(echo ;
#		echo "configure: No HOST specified." ;
#		echo) 1>&2
#		fatal=true
#	fi

### This is a bit twisted.
### * if all three are specified, this is an error.
### * if we have neither hosts, nor unadorned args, this is an error.
### * if no hosts are specified, then the unadorned args are hosts, but if
### there were none, this is an error.
### * if no targets are specified, then the unadorned args are targets, but if
### there were no unadorned args, then the hosts are also targets.

	if [ -n "${host_alias}" -a -n "${target_alias}" -a -n "${undefs}" ] ; then
		echo '***' Can only configure for one host and one target at a time.  1>&2
		fatal=yes
	elif [ -z "${host_alias}" -a -z "${undefs}" ] ; then
		echo '***' You must tell me for which host you want to configure.  1>&2
		fatal=yes
	else
		case "${host_alias}" in
		"") host_alias=${undefs} ;;
		*) ;;
		esac

		case "${target_alias}" in
		"")
			case "${undefs}" in
			"")	target_alias=${host_alias} ;;
			*)	target_alias=${undefs} ;;
			esac
			;;
		*) ;;
		esac
	fi
	;;
*) ;;
esac

if [ -n "${fatal}" -o "${host_alias}" = "help" ] ; then
	(echo "Usage: configure HOST" ;
	echo ;
	echo "Options: [defaults in brackets]" ;
	echo " -exec_prefix=MYDIR	configure for installation of host dependent files into MYDIR. [\"/usr/local\"]" ;
	echo " -gas			configure the compilers for use with gas. [native as]" ;
	echo " -help			print this message. [normal config]" ;
	echo " -lang=LANG		configure to build LANG. [gcc]" ;
	echo " -nfp			configure the compilers default to soft floating point. [hard float]" ;
	echo " -norecursion		configure this directory only. [recurse]" ;
	echo " -prefix=MYDIR		configure for installation of host dependent files into MYDIR. [\"/usr/local\"]" ;
	echo " -program_prefix=FOO	install programs with FOO prepended to their names. [ \"\" ]" ;
	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.  [ TMPDIR = \"/tmp\" ]" ;
	echo ;
	echo "Where HOST and TARGET are something like \"vax\", \"sun3\", \"encore\", etc." ;
	) 1>&2

	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
	;;
*) ;;
esac

### warn about some conflicting configurations.

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

# default exec_prefix
case "${exec_prefix}" 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
	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$$
trap "rm -f ${tmpfile}.com ${tmpfile}.tgt ${tmpfile}.hst ${tmpfile}.pos" 0

# 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}/configure.in.  1>&2
	exit 1
	;;
*) ;;
esac

result=`${configsub} ${host_alias}`
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

result=`${configsub} ${target_alias}`
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 ${PWD}/${srcdir}" 1>&2 ;;
	*)  echo '***' "${progname}: Can't find ${srcname} sources in ${PWD}/. or ${PWD}/.." 1>&2 ;;
	esac

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

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=${srcdir} ;;
		*) makesrcdir=../${srcdir}/${subdir} ;;
		esac
		;;
    esac

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

    if [ ! -d ${subdir} ] ; then
	mkdir ${subdir}
    fi

    case "${removing}" in
    "")
	if [ -n "${verbose}" -o -z "${silent}" ] ; then
	    echo Building in ${subdir}
	fi
	# 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 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 \"${file}\" does not exist." 1>&2
			exit 1
		fi

		${remove} -f ${link}
		# Make a symlink if possible, otherwise try a hard link
		${symbolic_link} ${srcdir}/${file} ${link} 2>/dev/null || ${hard_link} ${srcdir}/${file} ${link}

		if [ ! -r ${link} ] ; then
			echo '***' "${progname}: unable to link \"${link}\" to \"${srcdir}/${file}\"." 1>&2
			exit 1
		fi

		case "${verbose}" in
		"") ;;
		*)  echo "Linked \"${link}\" to \"${srcdir}/${file}\"." ;;
		esac
	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 .
dir ${makesrcdir}
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 three makefile fragments MUST end up in the resulting Makefile in this order: target, host, and site.
	# so do these separately because I don't trust the order of sed -e expressions.

	# Conditionalize for this site from "Makefile.in" (or whatever it's called) into Makefile.tem
	rm -f 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}. 1>&2
			mv ${subdir}/Makefile.tem ${Makefile}
		fi
	esac
	# working copy now in ${Makefile}

	# Conditionalize the makefile for this target.
	rm -f Makefile.tem
	case "${target_makefile_frag}" in
	"") mv ${Makefile} ${subdir}/Makefile.tem ;;
	*)
		target_makefile_frag=${srcdir}/${target_makefile_frag}
		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

	# 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}
target_alias = ${target_alias}
target_cpu = ${target_cpu}
target_vendor = ${target_vendor}
target_os = ${target_os}
EOF
	if [ "${target_makefile_frag}" != "" ] ; then
	    echo target_makefile_frag = ${invsubdir}${target_makefile_frag} >>${Makefile}
	fi 
	if [ "${host_makefile_frag}" != "" ] ; then
	    echo host_makefile_frag = ${invsubdir}${host_makefile_frag} >>${Makefile}
	fi 
	if [ "${site_makefile_frag}" != "" ] ; then
	    echo site_makefile_frag = ${invsubdir}${site_makefile_frag} >>${Makefile}
	fi 

	# fixme: this shouldn't be in configure.
	# Define macro CROSS_COMPILE in compilation if this is a cross-compiler.
	case "${host_alias}" in
	"${target_alias}")
		tooldir='$(libdir)'
		echo "ALL=all.internal" >> ${Makefile}
		;;
	*)
		echo "CROSS=-DCROSS_COMPILE" >> ${Makefile}
		echo "ALL=all.cross" >> ${Makefile}
		case "${program_prefix}" in
		"")	program_prefix=${target_alias}- ;;
		*)	;;
		esac

		tooldir="\$(libdir)/${target_alias}"
		;;
	esac

	# reset prefix, exec_prefix, srcdir, SUBDIRS, NONSUBDIRS,
	# remove any form feeds.
	if [ -z "${subdirs}" ]; then
	    sed -e "s:^SUBDIRS[ 	]*=.*$:SUBDIRS = ${configdirs}:" \
		-e "s:^NONSUBDIRS[ 	]*=.*$:NONSUBDIRS = ${noconfigdirs}:" \
		${subdir}/Makefile.tem > ${subdir}/Makefile.tem2
	    mv ${subdir}/Makefile.tem2 ${subdir}/Makefile.tem
	fi
	sed -e "s:^prefix[ 	]*=.*$:prefix = ${prefix}:" \
		-e "s:^exec_prefix[ 	]*=.*$:exec_prefix = ${exec_prefix}:" \
		-e "s:^srcdir[ 	]*=.*$:srcdir = ${makesrcdir}:" \
		-e "s///" \
		-e "s:^program_prefix[ 	]*=.*$:program_prefix = ${program_prefix}:" \
		-e "s:^tooldir[ 	]*=.*$:tooldir = ${tooldir}:" \
		${subdir}/Makefile.tem >> ${Makefile}
	# final copy now in ${Makefile}

	rm -f ${subdir}/Makefile.tem

	if [ -n "${verbose}" -o -z "${silent}" ] ; then
		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} ${using}
	fi

	. ${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}
# ${PWD} was configured as follows:
${progname}" ${arguments}  "
# ${using}" > ${subdir}/config.new
	else
	    echo "#!/bin/sh
# ${NO_EDIT}
# ${PWD}/${subdir} was configured as follows:
cd ${invsubdir}
${progname}" ${arguments}  "
# ${using}" > ${subdir}/config.new
	fi
	chmod a+x ${subdir}/config.new
	if [ -r 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 ${configdirs} ; do
		case "${verbose}" in
		"") ;;
		*) echo Configuring ${configdir}... ;;
		esac

		if [ -d ${srcdir}/${configdir} ] ; then
			case "${srcdir}" in
			".") ;;
			*)
				if [ ! -d ./${configdir} ] ; then
					mkdir ./${configdir}
				fi
				;;
			esac

			POPDIR=${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

### check for guested configure, otherwise fix possibly relative progname
			if [ -f ${newsrcdir}/configure ] ; then
				recprog=${newsrcdir}/configure
			else
				case "${progname}" in
				/*)	recprog=${progname} ;;
				*)	recprog=../${progname} ;;
				esac
			fi

### The recursion line is here.
			if ${recprog} -s ${host_alias} -target=${target_alias} \
				${verbose} ${prefixoption} ${tmpdiroption} ${exec_prefixoption} \
				${srcdiroption} ${program_prefixoption} ${site_option} ${removing} ; then
				true
			else
				exit 1
			fi

			cd ${POPDIR}
		else
			case "${verbose}" in
			"") ;;
			*) echo Warning: source directory \"${srcdir}/${configdir}\" is missing. ;;
			esac
		fi
	done
fi

### clean up.

# trap cmd above handles this now:
#rm -f ${tmpfile}.com ${tmpfile}.tgt ${tmpfile}.hst ${tmpfile}.pos

exit 0

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

# end of configure