path: root/configure

#!/bin/sh

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

# Configuration script
#   Copyright (C) 1988, 1990, 1991, 1992, 1993 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=$*
configdirs=
exec_prefix=
exec_prefixoption=
fatal=
floating_point=default
gas=default
host_alias=
host_makefile_frag=
moveifchange=
next_host=
next_prefix=
next_site=
next_srcdir=
next_target=
next_tmpdir=
norecursion=
package_makefile_frag=
prefix=/usr/local
progname=
program_prefix=
program_prefixoption=
program_suffix=
program_suffixoption=
program_transform_name=
program_transform_nameoption=
redirect=">/dev/null"
removing=
site=
site_makefile_frag=
site_option=
srcdir=
srctrigger=
subdirs=
target_alias=
target_makefile_frag=
undefinedargs=
version="$Revision$"
x11=default

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

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

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_program_suffix}" ] ; then
                program_suffix=${arg}
                program_suffixoption="-program_suffix=${program_suffix}"
                next_program_suffix=
        elif [ -n "${next_program_transform_name}" ] ; then
                # Double any backslashes or dollar signs in the argument
		if [ -n "${arg}" ] ; then
			program_transform_name="${program_transform_name} -e `echo ${arg} | sed -e 's/\\\\/\\\\\\\\/g' -e 's/\\\$/$$/g'`"
		fi
                program_transform_nameoption="${program_transform_nameoption} --program-transform-name='${arg}'"
                next_program_transform_name=
        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_host}" ] ; then
                next_host=
                case "${host_alias}" in
                "")
                        host_alias="${arg}"
                        ;;
                *)
                        echo '***' Can only configure for one host 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=* | --exec-prefix=* | --exec-prefi=* | --exec-pref=* | --exec-pre=* | --exec-pr=* | --exec-p=* | --exec-=* )
                        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 | -exec-prefix | --exec-prefix | --exec-prefi | --exec-pref | --exec-pre | --exec-pr | --exec-p | --exec-)
                        next_exec_prefix=yes
                        ;;
                -gas | --g*)
                        gas=yes
                        ;;
                -help | --he*)
                        fatal=true
                        ;;
                -host=* | --host=* | --hos=* | --ho=*)
                        case "${host_alias}" in
                        "")
                                host_alias="`echo ${arg} | sed 's/^[-a-z]*=//'`"
                                ;;
                        *)
                                echo '***' Can only configure for one host at a time.  1>&2
                                fatal=yes
                                ;;
                        esac
                        ;;
                -host=* | --host | --hos | --ho)
                        case "${host_alias}" in
                        "")
                                next_host=yes
                                ;;
                        *)
                                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-prefix=* | --program-prefix=* | --program-prefi=* | --program-pref=* | --program-pre=* | --program-pr=* | --program-p=*)
                        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-prefix | --program-prefix | --program-prefi | --program-pref | --program-pre | --program-pr | --program-p)
                        next_program_prefix=yes
                        ;;
                -program_suffix=* | --program_suffix=* | --program_suffi=* | --program_suff=* | --program_suf=* | --program_su=* | --program_s=* | -program-suffix=* | --program-suffix=* | --program-suffi=* | --program-suff=* | --program-suf=* | --program-su=* | --program-s=*)
                        program_suffix=`echo ${arg} | sed 's/^[-a-z_]*=//'`
                        program_suffixoption=${arg}
                        ;;
                -program_suffix | --program_suffix | --program_suffi | --program_suff | --program_suf | --program_su | --program_s |-program-suffix | --program-suffix | --program-suffi | --program-suff | --program-suf | --program-su | --program-s)
                        next_program_suffix=yes
                        ;;
                -program_transform_name=* | --program_transform_name=* | --program_transform_nam=* | --program_transform_na=* | --program_transform_n=* | --program_transform_=* | --program_transform=* | --program_transfor=* | --program_transfo=* | --program_transf=* | --program_trans=* | --program_tran=* | --program_tra=* | --program_tr=* | --program_t=* | -program-transform-name=* | --program-transform-name=* | --program-transform-nam=* | --program-transform-na=* | --program-transform-n=* | --program-transform-=* | --program-transform=* | --program-transfor=* | --program-transfo=* | --program-transf=* | --program-trans=* | --program-tran=* | --program-tra=* | --program-tr=* | --program-t=*)
			arg=`echo ${arg} | sed -e 's/^[-a-z_]*=//'`
                        # Double any \ or $ in the argument
			if [ -n "${arg}" ] ; then
	                        program_transform_name="${program_transform_name} -e `echo ${arg} | sed -e 's/\\\\/\\\\\\\\/g' -e 's/\\\$/$$/g'`"
			fi
                        program_transform_nameoption="${program_transform_nameoption} --program-transform-name='${arg}'"
                        ;;
                -program_transform_name | --program_transform_name | --program_transform_nam | --program_transform_na | --program_transform_n | --program_transform_ | --program_transform | --program_transfor | --program_transfo | --program_transf | --program_trans | --program_tran | --program_tra | --program_tr | --program_t | -program-transform-name | --program-transform-name | --program-transform-nam | --program-transform-na | --program-transform-n | --program-transform- | --program-transform | --program-transfor | --program-transfo | --program-transf | --program-trans | --program-tran | --program-tra | --program-tr | --program-t)
                        next_program_transform_name=yes
                        ;;
                -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)
                        redirect=
                        verbose=-v
                        ;;
                -version | -V | --version | --V)
                        echo "This is Cygnus Configure version" `echo ${version} | sed 's/[ $:]//g'`
                        exit 0
                        ;;
                -with*=* | --with*=*)
                        withopt=`echo ${arg} | sed 's:^-*\(with[^=]*\)=.*$:\1:;s/-/_/g'`
                        withval=`echo ${arg} | sed 's:^-*with[^=]*=\(.*\)$:\1:'`
                        eval $withopt="$withval"
                        withoptions="$withoptions $arg"
                        ;;
                -without* | --without*)
                        withopt=`echo ${arg} | sed 's:^-*without:with:;s/-/_/g'`		
                        eval $withopt=no
                        withoutoptions="$withoutoptions $arg"
                        ;;
                -with* | --with*)
                        withopt=`echo ${arg} | sed 's:^-*with:with:;s/-/_/g'`
                        eval $withopt=yes
                        withoptions="$withoptions $arg"
                        ;;
                -x | --x) ;;
                -* | --*)
                        (echo ;
                        echo "Unrecognized option: \"${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
                guesssys=`echo ${progname} | sed 's/configure$/config.guess/'`
                if tmp_alias=`${guesssys}` ; then
                        echo "Configuring for a ${tmp_alias} host." 1>&2
                        host_alias=${tmp_alias}
			case "${target_alias}" in
			"") target_alias=${tmp_alias} ;;
			*) ;;
			esac
			arguments="--host=${host_alias} ${arguments}"
                else
                        echo 'Config.guess failed to determine the host type.  You need to specify one.' 1>&2
                        fatal=yes
                fi
        else
                case "${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 " --prefix=MYDIR            configure for installation of host dependent files into MYDIR. [\"/usr/local\"]" ;
        echo " --exec-prefix=MYDIR       configure for installation of host dependent files into MYDIR. [\"/usr/local\"]" ;
        echo " --help                    print this message. [normal config]" ;
        echo " --norecursion             configure this directory only. [recurse]" ;
        echo " --program-prefix=FOO      install programs with FOO prepended to their names. [ \"\" ]" ;
        echo " --program-suffix=FOO      install programs with FOO appended to their names. [ \"\" ]" ;
        echo " --program-transform-name=FOO      install programs with names transformed by sed pattern FOO. [ \"\" ]" ;
        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 " --nfp                     configure the compilers default to soft floating point. [hard float]" ;
        echo " --with-FOO, --with-FOO=BAR specify that FOO is available"
        echo " --without-FOO             specify that FOO is NOT available"
        echo ;
        echo "Where HOST and TARGET are something like \"vax\", \"sun3\", \"encore\", etc." ;
        echo ;
        ) 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=`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=`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 ${PWD=`pwd`}/${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
# Use a double $ so that make ignores it
if [ "${program_suffix}" != "" ] ; then
    program_transform_name="-e s/\$\$/${program_suffix}/ ${program_transform_name}"
fi

if [ "${program_prefix}" != "" ] ; then
    program_transform_name="-e s/^/${program_prefix}/ ${program_transform_name}"
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=${srcdir} ;;
                *) makesrcdir=${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
                ${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

                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 .
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 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 > ${Makefile}
                      else
                              echo '***' Expected package makefile fragment \"${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}-${target_os}
EOF
            case "${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 

	    # make sure that some sort of reasonable default exists for these 
	    # two variables
	    CXX=${CXX-"g++ -O"}
	    CC=${CC-cc}

            # 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 = ${exec_prefix}:" \
		    -e "/^CC[ 	]*=/{
			b chkcc
			:contcc
			N
			:chkcc
			s/\\\\$//
			t contcc
			s/^CC[ 	]*=.*$/CC = ${CC}/
			}" \
		    -e "/^CXX[ 	]*=/{
			b chkcxx
			:contcxx
			N
			:chkcxx
			s/\\\\$//
			t contcxx
			s/^CXX[ 	]*=.*$/CXX = ${CXX}/
			}" \
                    -e "s:^srcdir[ 	]*=.*$: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}
            # 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

### 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} ${verbose} --host=${host_alias} --target=${target_alias} \
        	                        ${prefixoption} ${tmpdiroption} ${exec_prefixoption} \
                	                ${srcdiroption} ${program_prefixoption} ${program_suffixoption} ${program_transform_nameoption} ${site_option} ${withoptions} ${withoutoptions} ${removing} ${redirect} ; then
	                                true
        	                else
                	                exit 1
                        	fi
			fi

                        cd ${POPDIR}
                fi
        done
fi

exit 0

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

# end of configure