configure

早期freebsd实现

# 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

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

if [ "${host_alias}" != "${target_alias}" ] ; then
    if [ "${program_prefix}" = "" ] ; then
	if [ "${program_suffix}" = "" ] ; then 
	    if [ "${program_transform_name}" = "" ] ; then
		program_prefix=${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=`echo ${subdir} | sed -e 's:[^./][^./]*:..:g'`/${srcdir}/${subdir} ;;
		esac
		;;
    esac

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

    if [ ! -d ${subdir} ] ; then
	mkdir ${subdir}
    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 \"${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 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 ${subdir}/Makefile.tem
	case "${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

	# 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}-${target_os}
EOF
	case "${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 

	# 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}")
		echo "ALL=all.internal" >> ${Makefile}
		;;
	*)
		echo "CROSS=-DCROSS_COMPILE" >> ${Makefile}
		echo "ALL=all.cross" >> ${Makefile}
		;;
	esac

	# 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 = ${exec_prefix}:" \
		-e "s:^srcdir[ 	]*=.*$: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}

	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
		eval echo Configuring ${configdir}... ${redirect}

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

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

			cd ${POPDIR}
		else
			eval echo Warning: source directory \"${srcdir}/${configdir}\" is missing. ${redirect}
		fi
	done
fi

exit 0

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

# end of configure