#!/bin/sh

# Configuration script
#   Copyright (C) 1988, 1990, 1991 Free Software Foundation, Inc.

#This file is part of GNU.

# 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.  */

# $Id$

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

#
# 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.
#

# set -e

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
ansi=
arguments=$*
commontargets=
configdirs=
defaulttargets=
destdir=
fatal=
hostsubdir=
norecursion=
objdir=
objdiroption=
progname=
recurring=
removing=
srcdir=
srctrigger=
target=
targets=
targetsubdir=
verbose=

for arg in $*;
do
	case ${arg} in
	-ansi | +a*)
		ansi=true
		clib=clib
		;;
	-destdir=* | +destdir=* | +destdi=* | +destd=* | +dest=* | +des=* | +de=* | +d=*)
		destdir=`echo ${arg} | sed 's/[+-]d[a-z]*=//'`
		;;
	-languages=* | +languages=* | +language=* | +languag=* \
		| +langua=* | +langu=* | +lang=* | +lan=* | +la=* \
		| +l=*)
		languages="${languages} `echo ${arg} | sed 's/[+-]l[a-z]*=//'`"
		;;
	-gas | +g*)
		gas=yes
		;;
	-help | +h*)
		fatal=true
		;;
	-nfp | +nf*)
		nfp=yes
		;;
	-norecursion | +no*)
		norecursion=true
		;;
	-objdir=* | +objdir=* | +objdi=* | +objd=* | +obj=* | +ob=* | +o=*)
		objdiroption=${arg}
		objdir=`echo ${arg} | sed 's/[+-]o[a-z]*=//'`
		;;
	-recurring | +recurring | +recurrin | +recurri | +recurr | +recur | +recu | +rec | +re)
		recurring=true
		;;
	-rm | +rm)
		removing=${arg}
		;;
	-site=* | +site=* | +sit=* | +si=*)
		site=`echo ${arg} | sed 's/[+-]s[a-z]*=//'`
		;;
#	-srcdir=* | +srcdir=* | +srcdi=* | +srcd=* | +src=* | +sr=*)
#		srcdir=`echo ${arg} | sed 's/[+-]s[a-z]*=//'`
#		;;
	-subdirs | +su*)
		subdirs=${arg}
		;;
	-target=* | +target=* | +targe=* | +targ=* | +tar=* | +ta=*)
		if [ -n "${targets}" ] ; then
			subdirs="+subdirs"
		fi

		newtargets="${targets} `echo ${arg} | sed 's/[+-]t[a-z]*=//'`"
		targets="${newtargets}"
		;;
	-tmpdir=* | +tmpdir=* | +tmpdi=* | +tmpd=* | +tmp=* | +tm=*)
		tmpdiroption=${arg}
		TMPDIR=`echo ${arg} | sed 's/[+-]t[a-z]*=//'`
		;;
	-v | -verbose | +v*)
		verbose=${arg}
		;;
	-* | +*)
		(echo ;
		echo "Unrecognized option: \"${arg}\"". ;
		echo) 1>&2
		fatal=true
		;;
	*)
		if [ -n "${hosts}" ] ; then
			subdirs="+subdirs"
		fi

		newhosts="${hosts} ${arg}"
		hosts=${newhosts}
		;;
	esac
done

if [ -n "${verbose}" ] ; then
	echo $0 $*
fi

## 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 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.
##
## otherwise we prepend `pwd` to $0 and hope that will give us an absolute
## path.
##

if (echo $0 | grep '^/' > /dev/null) ; then
	progname=$0
else
	if (echo $0 | grep '/' > /dev/null) ; then
		progname=`pwd`/$0
	else
		progname=$0
		PATH=$PATH:`pwd` ; export PATH
	fi
fi

configsub=`echo ${progname} | sed 's/configure\$/config.sub/'`

if [ ! -f ${configsub} ] ; then
	echo '***' cannot find config.sub.
	echo 1
fi

# process host and target only if not removing.
if [ -z "${removing}" -a -z "${fatal}" ] ; then
	# Complain if an arg is missing
	if [ -z "${hosts}" ] ; then
		(echo ;
		echo "configure: No HOST specified." ;
		echo) 1>&2
		fatal=true
	fi
fi

if [ -n "${fatal}" -o "${hosts}" = "help" ] ; then
	(echo "Usage: configure HOST" ;
	echo ;
	echo "Options: [defaults in brackets]" ;
	echo " +ansi		configure w/ANSI library. [no ansi lib]" ;
	echo " +destdir=MYDIR	configure for installation 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 " +objdir=ODIR	configure in a parallel tree rooted in ODIR. [rooted in \".\"]" ;
	echo " +rm		remove this configuration. [build a configuration]" ;
	echo " +site		configure with site specific makefile" ;
# This is correctly aligned in the output, even though it isn't here.
	echo " +subdirs	configure in subdirectories.  [in source directories]" ;
	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." ;
	echo "Asking for more than one \"+target\" implies \"+subdirs\".  Any other" ;
	echo "options given will apply to all targets.") 1>&2

	if [ -r config.status ] ; then
		cat config.status
	fi

	exit 1
fi

### break up configure.in.
if [ -r configure.in ] ; then
	if [ -z "`grep '^# per\-host:' configure.in`" ] ; then
		echo '***' `pwd`/configure.in has no "per-host:" line. 1>&2
		exit 1
	fi

	if [ -z "`grep '^# per\-target:' configure.in`" ] ; then
		echo '***' `pwd`/configure.in has no "per-target:" line. 1>&2
		exit 1
	fi

	if [ -z "${TMPDIR}" ] ; then
		TMPDIR=/tmp ; export TMPDIR
	fi

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

else
	echo '***' No configure.in in `pwd`
	exit 1
fi

### do common part of configure.in

. ${TMPDIR}/configure.$$.com

# some sanity checks on configure.in
if [ -z "${srctrigger}" ] ; then
	echo '***' srctrigger not set in `pwd`/configure.in.
	exit 1
fi

for host in ${hosts} ; do
	# Default other arg
	if [ -z "${targets}" -o -n "${defaulttargets}" ] ; then
		targets=${host}
		defaulttargets=true
	fi

	host_alias=${host}

	result=`${configsub} ${host}`
	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}
	host_makefile_frag=config/hmake-${host}

	. ${TMPDIR}/configure.$$.hst

	for target in ${targets} ; do

		target_alias=${target}
		result=`${configsub} ${target}`
		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}
		target_makefile_frag=config/tmake-${target}

		. ${TMPDIR}/configure.$$.tgt

		# Temporarily, we support only direct subdir builds.
		hostsubdir=H-${host_alias}
		targetsubdir=T-${target_alias}

		if [ -n "${removing}" ] ; then
			if [ -n "${objdir}" ] ; then
				echo '***' +rm not supported for +objdir.  Just \"rm -rf ${objdir}\" by hand.
				exit 1
			fi

			if [ -n "${subdirs}" ] ; then
				if [ -d "${hostsubdir}" ] ; then
					rm -rf ${hostsubdir}/${targetsubdir}

					if [ -z "`(ls ${hostsubdir}) 2>&1 | grep T- | grep -v T-independent`" ] ; then
						rm -rf ${hostsubdir}
					fi
				else
					echo Warning: no `pwd`/${hostsubdir} to remove.
				fi
			else
				rm -f ${Makefile} config.status ${links}
			fi
		else
			if [ -n "${objdir}" ]; then
				srcdir=`pwd`
				cd ${objdir}
			fi

			if [ -n "${subdirs}" ] ; then
				# check for existing status before allowing forced subdirs.
				if [ -f ${Makefile} ] ; then
					echo '***' "${Makefile} already exists in source directory.  `pwd` not configured." 1>&2
					exit 1
				fi

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

				if [ ! -d ${targetsubdir} ] ; then
					if [ -z "${commontargets}" ] ; then
						mkdir ${targetsubdir}
					else
						if [ ! -d T-independent ] ; then
							mkdir T-independent
						fi

						${symbolic_link} T-independent ${targetsubdir}
					fi # if target independent
				fi # if no target dir yet

				cd ${targetsubdir}

				if [ -z "${srcdir}" ] ; then
					srcdir=../..
				fi
			else
				# if not subdir builds, then make sure none exist.
				if [ -n "`(ls .) 2>&1 | (grep H- ; true)`" ] ; then
					echo '***' "Configured subdirs exist.  `pwd` not configured." 1>&2
					exit 1
				else
					true
				fi
			fi

			# Find the source files, if location was not specified.
			if [ -z "${srcdir}" ] ; then
				srcdirdefaulted=1
				srcdir=.
				if [ -n "${srctrigger}" -a ! -r ${srctrigger} ] ; then
					srcdir=..
				fi
			fi

			if [ -n "${srctrigger}" -a ! -r ${srcdir}/${srctrigger} ] ; then
				if [ -z "${srcdirdefaulted}" ] ; then
					echo '***' "${progname}: Can't find ${srcname} sources in `pwd`/${srcdir}" 1>&2
				else
					echo '***' "${progname}: Can't find ${srcname} sources in `pwd`/. or `pwd`/.." 1>&2
				fi

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

			# 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.
			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}
				rm -f config.status
				# 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

				if [ -n "${verbose}" ] ; then
					echo "Linked \"${link}\" to \"${srcdir}/${file}\"."
				fi
			done

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

			case ${srcdir} in
			.)
				;;
			*)
				echo "dir ." > .gdbinit
				echo "dir ${srcdir}" >> .gdbinit
				echo "source ${srcdir}/.gdbinit" >> .gdbinit
				;;
			esac

			# Install a makefile, and make it set VPATH
			# if necessary so that the sources are found.
			# Also change its value of srcdir.

		# FIXME-someday: This business of always writing to .tem and mv back
		# is so that I don't screw things up while developing.  Once this
		# template is stable, these should be optimized. xoxorich.

			# Define macro CROSS_COMPILE in compilation if this is a cross-compiler.
			if [ "${host}" != "${target}" ] ; then
				echo "CROSS=-DCROSS_COMPILE" > ${Makefile}
				echo "ALL=start.encap" >> ${Makefile}
			else
				echo "ALL=all.internal" > ${Makefile}
			fi

			# set target, host, VPATH
			echo "host_alias = ${host_alias}" >> ${Makefile}
			echo "host_cpu = ${host_cpu}" >> ${Makefile}
			echo "host_vendor = ${host_vendor}" >> ${Makefile}
			echo "host_os = ${host_os}" >> ${Makefile}

			echo "target_alias = ${target_alias}" >> ${Makefile}
			echo "target_cpu = ${target_cpu}" >> ${Makefile}
			echo "target_vendor = ${target_vendor}" >> ${Makefile}
			echo "target_os = ${target_os}" >> ${Makefile}

			if [ -n "${subdirs}" ] ; then
				(echo "subdir = /${hostsubdir}/${targetsubdir}" ;
					echo "unsubdir = ../..") >> ${Makefile}
			else
				(echo "subdir =" ;
					echo "unsubdir = .") >> ${Makefile}
			fi

		#	echo "workdir = `pwd`" >> ${Makefile}
			echo "VPATH = ${srcdir}" >> ${Makefile}

			# add "Makefile.in" (or whatever it's called)
			cat ${srcdir}/${Makefile_in} >> ${Makefile}

			# Conditionalize the makefile for this host.
			if [ -f ${srcdir}/${host_makefile_frag} ] ; then
				(echo "host_makefile_frag = ${srcdir}/${host_makefile_frag}" ; 
					sed -e "/^####/  r ${srcdir}/${host_makefile_frag}" ${Makefile}) > Makefile.tem
				mv Makefile.tem ${Makefile}
			fi

			# Conditionalize the makefile for this target.
			if [ -f ${srcdir}/${target_makefile_frag} ] ; then
				(echo "target_makefile_frag = ${srcdir}/${target_makefile_frag}" ; 
					sed -e "/^####/  r ${srcdir}/${target_makefile_frag}" ${Makefile}) > Makefile.tem
				mv Makefile.tem ${Makefile}
			fi

			# Conditionalize the makefile for this site.
			if [ -n "${site}" ] ; then
				site_makefile_frag=smake-${site}

				if [ -f ${srcdir}/${site_makefile_frag} ] ; then
					(echo "site_makefile_frag = ${srcdir}/${site_makefile_frag}" ; 
						sed -e "/^####/  r ${srcdir}/${site_makefile_frag}" ${Makefile}) > Makefile.tem
					mv Makefile.tem ${Makefile}
				fi
			fi

			# set srcdir
			sed "s@^srcdir = \.@srcdir = ${srcdir}@" ${Makefile} > Makefile.tem
			mv Makefile.tem ${Makefile}

			# set destdir
			if [ -n "${destdir}" ] ; then
				sed "s:^destdir =.*$:destdir = ${destdir}:" ${Makefile} > Makefile.tem
				mv Makefile.tem ${Makefile}
			fi

			# reset SUBDIRS
			sed "s:^SUBDIRS =.*$:SUBDIRS = ${configdirs}:" ${Makefile} > Makefile.tem
			mv Makefile.tem ${Makefile}

			# reset NONSUBDIRS
			sed "s:^NONSUBDIRS =.*$:NONSUBDIRS = ${noconfigdirs}:" ${Makefile} > Makefile.tem
			mv Makefile.tem ${Makefile}

			# remove any form feeds.
			sed -e "s///" ${Makefile} > Makefile.tem
			mv Makefile.tem ${Makefile}

			using=
			if [ -f ${srcdir}/${host_makefile_frag} ] ; then
				using=" using \"${host_makefile_frag}\""
			fi

			if [ -f ${srcdir}/${target_makefile_frag} ] ; then
				if [ -z "${using}" ] ; then
					andusing=" using \"${target_makefile_frag}\""
				else
					andusing="${using} and \"${target_makefile_frag}\""
				fi
			else
				andusing=${using}
			fi

			if [ -f ${srcdir}/${site_makefile_frag} ] ; then
				if [ -z "${andusing}" ] ; then
					andandusing=" using \"${site_makefile_frag}\""
				else
					andandusing="${andusing} and \"${site_makefile_frag}\""
				fi
			else
				andandusing=${using}
			fi

			if [ -n "${verbose}" -o -z "${recurring}" ] ; then
				echo "Created \"${Makefile}\"" in `pwd`${andandusing}.
			fi

			if [ -f ${TMPDIR}/configure.$$.pos ] ; then
				. ${TMPDIR}/configure.$$.pos
			fi

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

			echo "#!/bin/sh
# `pwd` was configured as follows:
(cd ${srcdir} ; ${progname}" ${arguments} `if [ -z "${norecursion}" ] ; then echo +norecursion ; else true ; fi` ")" > config.status
			chmod a+x config.status

			originaldir=`pwd`
			cd ${srcdir}
		fi

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

				if [ -d ${configdir} ] ; then
					if [ -n "${objdir}" ] ; then
						if [ ! -d ${objdir}/${configdir} ] ; then
							mkdir ${objdir}/${configdir}
						fi
					fi

					(cd ${configdir} ;
						${progname} +recurring ${host_alias} +target=${target_alias} \
							${verbose} ${subdirs} ${removing} +destdir=${destdir} \
							`if [ -n "${objdir}" ] ; then echo +objdir=${objdir}/${configdir} ; fi` \
							${tmpdiroption}) \
						| sed 's/^/	/'
				else
					if [ -n "${verbose}" ] ; then
						echo Warning: directory \"${configdir}\" is missing.
					fi
				fi
			done
		fi
	done # for each target

	# Now build a Makefile for this host.
	if [ -n "${subdirs}" -a ! -n "${removing}" ] ; then
		push=`pwd`

		if [ -n "${objdir}" ] ; then
			cd ${objdir}
		fi

		cd ${hostsubdir}
		cat > GNUmakefile << E!O!F
# Makefile generated by configure for host ${host_alias}.

ALL := $(shell ls -d T-*)

%:
	$(foreach subdir,$(ALL),$(MAKE) -C $(subdir) \$@ &&) true

all:
E!O!F
		cd ${push}
	fi
done # for each host

### clean up.

rm -f ${TMPDIR}/configure.$$.com ${TMPDIR}/configure.$$.tgt ${TMPDIR}/configure.$$.hst ${TMPDIR}/configure.$$.pos

exit 0

#
#
# $Log$
# Revision 1.52  1991/10/09 00:48:26  rich
# Another patch from jim.
#
# Revision 1.51  1991/10/08  06:07:58  wilson
# Fix bug in smake- file code.
#
# Revision 1.50  1991/10/04  23:49:37  rich
# Per's patch for my config.sub botch.
#
# Revision 1.49  1991/10/04  22:52:09  rich
# Use john's heuristic for finding ourselves.  kinda like hare krishna.
#
# Revision 1.48  1991/10/02  13:17:28  rich
# take out the set -e for now
#
# Revision 1.47  1991/10/02  10:02:23  rich
# * temporary files in TMPDIR
# * +objdir
#
# Revision 1.46  1991/10/02  06:29:53  rich
# Added +site=foo option for naming site specific Makefile fragments.
#
# Revision 1.45  1991/10/02  06:15:13  rich
# Removed +f option.  Used to stand for +forcesubdirs which is now
# called +subdirs.
#
# Revision 1.44  1991/10/02  06:02:35  rich
# Added rcs log line.
#
#
#

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

# end of configure