CF_SHARED_OPTS

dnl CF_SHARED_OPTS version: 111 updated: 2024/03/29 20:08:49
dnl --------------
dnl --------------
dnl Attempt to determine the appropriate CC/LD options for creating a shared
dnl library.
dnl
dnl Notes:
dnl a) ${LOCAL_LDFLAGS} is used to link executables that will run within
dnl the build-tree, i.e., by making use of the libraries that are compiled in
dnl $rel_builddir/lib We avoid compiling-in a $rel_builddir/lib path for the
dnl shared library since that can lead to unexpected results at runtime.
dnl b) ${LOCAL_LDFLAGS2} has the same intention but assumes that the shared
dnl libraries are compiled in ../../lib
dnl
dnl The variable 'cf_cv_do_symlinks' is used to control whether we configure
dnl to install symbolic links to the rel/abi versions of shared libraries.
dnl
dnl The variable 'cf_cv_shlib_version' controls whether we use the rel or abi
dnl version when making symbolic links.
dnl
dnl The variable 'cf_cv_shlib_version_infix' controls whether shared library
dnl version numbers are infix (ex: libncurses.<ver>.dylib) or postfix
dnl (ex: libncurses.so.<ver>).
dnl
dnl Some loaders leave 'so_locations' lying around.  It is nice to clean up.
AC_DEFUN([CF_SHARED_OPTS],
[
	AC_REQUIRE([CF_LD_RPATH_OPT])

	RM_SHARED_OPTS=
	LOCAL_LDFLAGS=
	LOCAL_LDFLAGS2=
	LD_SHARED_OPTS=
	INSTALL_LIB="-m 644"
	: ${rel_builddir:=.}

	shlibdir=$libdir
	AC_SUBST(shlibdir)

	MAKE_DLLS="#"
	AC_SUBST(MAKE_DLLS)

	cf_cv_do_symlinks=no
	cf_ld_rpath_opt=
	test "$cf_cv_enable_rpath" = yes && cf_ld_rpath_opt="$LD_RPATH_OPT"

	AC_MSG_CHECKING(whether to use release or ABI version in shared library file names)
	AC_ARG_WITH(shlib-version,
	[[  --with-shlib-version[={rel|abi}] use release or ABI version in shared library file names]],
	[test -z "$withval" && withval=auto
	case "$withval" in
	(yes)
		cf_cv_shlib_version=auto
		;;
	(rel|abi|auto)
		cf_cv_shlib_version=$withval
		;;
	(*)
		AC_MSG_RESULT($withval)
		AC_MSG_ERROR([option value must be one of: rel, abi, or auto])
		;;
	esac
	],[cf_cv_shlib_version=auto])
	AC_MSG_RESULT($cf_cv_shlib_version)

	cf_cv_rm_so_locs=no
	cf_try_cflags=

	# Some less-capable ports of gcc support only -fpic
	CC_SHARED_OPTS=

	cf_try_fPIC=no
	if test "$GCC" = yes
	then
		cf_try_fPIC=yes
	else
		case "$cf_cv_system_name" in
		(*linux*)	# e.g., PGI compiler
			cf_try_fPIC=yes
			;;
		esac
	fi

	if test "$cf_try_fPIC" = yes
	then
		AC_MSG_CHECKING(which $CC option to use)
		cf_save_CFLAGS="$CFLAGS"
		for CC_SHARED_OPTS in -fPIC -fpic ''
		do
			CFLAGS="$cf_save_CFLAGS $CC_SHARED_OPTS"
			AC_TRY_COMPILE([#include <stdio.h>],[int x = 1; (void)x],[break],[])
		done
		AC_MSG_RESULT($CC_SHARED_OPTS)
		CFLAGS="$cf_save_CFLAGS"
	fi

	cf_cv_shlib_version_infix=no

	case "$cf_cv_system_name" in
	(aix4.[3-9]*|aix[[5-7]]*)
		if test "$GCC" = yes; then
			CC_SHARED_OPTS='-Wl,-brtl'
			MK_SHARED_LIB='${CC} ${LDFLAGS} ${CFLAGS} -shared -Wl,-brtl -Wl,-blibpath:${RPATH_LIST}:/usr/lib -o [$]@'
		else
			CC_SHARED_OPTS='-brtl'
			# as well as '-qpic=large -G' or perhaps "-bM:SRE -bnoentry -bexpall"
			MK_SHARED_LIB='${CC} ${LDFLAGS} ${CFLAGS} -G -Wl,-brtl -Wl,-blibpath:${RPATH_LIST}:/usr/lib -o [$]@'
		fi
		;;
	(beos*)
		MK_SHARED_LIB='${CC} ${LDFLAGS} ${CFLAGS} -o $[@] -Xlinker -soname=`basename $[@]` -nostart -e 0'
		;;
	(cygwin*)
		CC_SHARED_OPTS=
		MK_SHARED_LIB=$SHELL' '$rel_builddir'/mk_shared_lib.sh [$]@ [$]{CC} [$]{CFLAGS}'
		RM_SHARED_OPTS="$RM_SHARED_OPTS $rel_builddir/mk_shared_lib.sh *.dll.a"
		cf_cv_shlib_version=cygdll
		cf_cv_shlib_version_infix=cygdll
		shlibdir=$bindir
		MAKE_DLLS=
		cat >mk_shared_lib.sh <<-CF_EOF
		#!$SHELL
		SHARED_LIB=\[$]1
		IMPORT_LIB=\`echo "\[$]1" | sed -e 's/cyg/lib/' -e 's/[[0-9]]*\.dll[$]/.dll.a/'\`
		shift
		cat <<-EOF
		Linking shared library
		** SHARED_LIB \[$]SHARED_LIB
		** IMPORT_LIB \[$]IMPORT_LIB
EOF
		exec \[$]* ${LDFLAGS} -shared -Wl,--out-implib=\[$]{IMPORT_LIB} -Wl,--export-all-symbols -o \[$]{SHARED_LIB}
CF_EOF
		chmod +x mk_shared_lib.sh
		;;
	(msys*)
		CC_SHARED_OPTS=
		MK_SHARED_LIB=$SHELL' '$rel_builddir'/mk_shared_lib.sh [$]@ [$]{CC} [$]{CFLAGS}'
		RM_SHARED_OPTS="$RM_SHARED_OPTS $rel_builddir/mk_shared_lib.sh *.dll.a"
		cf_cv_shlib_version=msysdll
		cf_cv_shlib_version_infix=msysdll
		shlibdir=$bindir
		MAKE_DLLS=
		cat >mk_shared_lib.sh <<-CF_EOF
		#!$SHELL
		SHARED_LIB=\[$]1
		IMPORT_LIB=\`echo "\[$]1" | sed -e 's/msys-/lib/' -e 's/[[0-9]]*\.dll[$]/.dll.a/'\`
		shift
		cat <<-EOF
		Linking shared library
		** SHARED_LIB \[$]SHARED_LIB
		** IMPORT_LIB \[$]IMPORT_LIB
EOF
		exec \[$]* ${LDFLAGS} -shared -Wl,--out-implib=\[$]{IMPORT_LIB} -Wl,--export-all-symbols -o \[$]{SHARED_LIB}
CF_EOF
		chmod +x mk_shared_lib.sh
		;;
	(darwin*)
		cf_try_cflags="no-cpp-precomp"
		CC_SHARED_OPTS="-dynamic"
		MK_SHARED_LIB='${CC} ${LDFLAGS} ${CFLAGS} -dynamiclib -install_name ${libdir}/`basename $[@]` -compatibility_version ${ABI_VERSION} -current_version ${ABI_VERSION} -o $[@]'
		test "$cf_cv_shlib_version" = auto && cf_cv_shlib_version=abi
		cf_cv_shlib_version_infix=yes
		AC_CACHE_CHECK([if ld -search_paths_first works], cf_cv_ldflags_search_paths_first, [
			cf_save_LDFLAGS=$LDFLAGS
			LDFLAGS="$LDFLAGS -Wl,-search_paths_first"
			AC_TRY_LINK(, [int i;], cf_cv_ldflags_search_paths_first=yes, cf_cv_ldflags_search_paths_first=no)
				LDFLAGS=$cf_save_LDFLAGS])
		if test "$cf_cv_ldflags_search_paths_first" = yes; then
			LDFLAGS="$LDFLAGS -Wl,-search_paths_first"
		fi
		;;
	(haiku*)
		CF_SHARED_SONAME
		MK_SHARED_LIB='${CC} ${LDFLAGS} ${CFLAGS} -shared -Wl,-soname,'$cf_cv_shared_soname',-stats,-lc -o $[@]'
		;;
	(hpux[[7-8]]*)
		# HP-UX 8.07 ld lacks "+b" option used for libdir search-list
		if test "$GCC" != yes; then
			CC_SHARED_OPTS='+Z'
		fi
		MK_SHARED_LIB='${LD} ${LDFLAGS} -b -o $[@]'
		INSTALL_LIB="-m 555"
		;;
	(hpux*)
		# (tested with gcc 2.7.2 -- I don't have c89)
		if test "$GCC" = yes; then
			LD_SHARED_OPTS='-Xlinker +b -Xlinker ${libdir}'
		else
			CC_SHARED_OPTS='+Z'
			LD_SHARED_OPTS='-Wl,+b,${libdir}'
		fi
		MK_SHARED_LIB='${LD} ${LDFLAGS} +b ${libdir} -b -o $[@]'
		# HP-UX shared libraries must be executable, and should be
		# readonly to exploit a quirk in the memory manager.
		INSTALL_LIB="-m 555"
		;;
	(interix*)
		test "$cf_cv_shlib_version" = auto && cf_cv_shlib_version=rel
		if test "$cf_cv_shlib_version" = rel; then
			cf_shared_soname='`basename $[@] .${REL_VERSION}`.${ABI_VERSION}'
		else
			cf_shared_soname='`basename $[@]`'
		fi
		CC_SHARED_OPTS=
		MK_SHARED_LIB='${CC} ${LDFLAGS} ${CFLAGS} -shared -Wl,-rpath,${RPATH_LIST} -Wl,-h,'$cf_shared_soname' -o $[@]'
		;;
	(irix*)
		if test "$cf_cv_enable_rpath" = yes ; then
			EXTRA_LDFLAGS="${cf_ld_rpath_opt}\${RPATH_LIST} $EXTRA_LDFLAGS"
		fi
		# tested with IRIX 5.2 and 'cc'.
		if test "$GCC" != yes; then
			CC_SHARED_OPTS='-KPIC'
			MK_SHARED_LIB='${CC} ${LDFLAGS} ${CFLAGS} -shared -rdata_shared -soname `basename $[@]` -o $[@]'
		else
			MK_SHARED_LIB='${CC} ${LDFLAGS} ${CFLAGS} -shared -Wl,-soname,`basename $[@]` -o $[@]'
		fi
		cf_cv_rm_so_locs=yes
		;;
	(linux*|gnu*|k*bsd*-gnu)
		if test "$DFT_LWR_MODEL" = "shared" && test -n "$LD_RPATH_OPT" ; then
			LOCAL_LDFLAGS="${LD_RPATH_OPT}\$(LOCAL_LIBDIR)"
			LOCAL_LDFLAGS2="$LOCAL_LDFLAGS"
		fi
		if test "$cf_cv_enable_rpath" = yes ; then
			EXTRA_LDFLAGS="${cf_ld_rpath_opt}\${RPATH_LIST} $EXTRA_LDFLAGS"
		fi
		CF_SHARED_SONAME
		MK_SHARED_LIB='${CC} ${LDFLAGS} ${CFLAGS} -shared -Wl,-soname,'$cf_cv_shared_soname',-stats,-lc -o $[@]'
		;;
	(mingw*msvc*)
		cf_cv_shlib_version=msvcdll
		cf_cv_shlib_version_infix=msvcdll
		shlibdir=$bindir
		MAKE_DLLS=
		if test "$DFT_LWR_MODEL" = "shared" ; then
			LOCAL_LDFLAGS="-link -dll"
			LOCAL_LDFLAGS2="$LOCAL_LDFLAGS"
			EXTRA_LDFLAGS="-link -dll $EXTRA_LDFLAGS"
		fi
		CC_SHARED_OPTS=
		MK_SHARED_LIB=$SHELL' '$rel_builddir'/mk_shared_lib.sh [$]@ ${LD} [$]{CFLAGS}'
		RM_SHARED_OPTS="$RM_SHARED_OPTS $rel_builddir/mk_shared_lib.sh *.dll.lib"
		cat >mk_shared_lib.sh <<-CF_EOF
		#!$SHELL
		SHARED_LIB=\[$]1
		IMPORT_LIB=\`echo "\[$]1" | sed -e 's/[[0-9]]*\.dll[$]/.dll.lib/'\`
		shift
		my_ld=\[$]1
		shift
		cat <<-EOF
		Linking shared library
		** SHARED LIB \$SHARED_LIB
		** IMPORT_LIB \$IMPORT_LIB
EOF
		args=\$(echo \[$]* | sed -E "s#-l(\w*)#\1.dll.lib#g" | sed -E "s#-L(\w*)#-LIBPATH:\1#g")
		exec \$my_ld -DLL -IMPLIB:"\${IMPORT_LIB}" -OUT:"\${SHARED_LIB}" ${LDFLAGS} \$args
		mv "\${IMPORT_LIB}" "\${IMPORT_LIB}"
CF_EOF
		chmod +x mk_shared_lib.sh
		cat >mk_prog.sh <<-CF_EOF
		#!$SHELL
		shift
		# Ignore first argument (compiler) and use LD (link.exe) unconditionally
		LD="[$]LD"
		clopts=()
		ldopts=("/subsystem:console")
		libs=()
		isdll=0
		while test \[$]# -gt 0; do
			case "\[$]1" in
				-link)
					# ignore -link argument
					;;
				-M[[TD]] | -M[[TD]]d)
					# ignore runtime-library option
					;;
				-dll)
					isdll=1
					;;
				-W* | -w*)
					# ignore warnings
					;;
				-D*)
					clopts+=("\[$]1")
					;;
				-I*)
					clopts+=("\[$]1")
					;;
				-l*)
					libs+=("\`echo \"\[$]1\" | sed \"s/^-l//\"\`")
					;;
				-L*)
					ldopts+=("\`echo \"\[$]1\" | sed \"s/^-L/-LIBPATH:/\"\`")
					;;
				*.obj | *.o)
					ldopts+=("\[$]1")
					;;
				-Wl,*)
					for linkarg in \`echo '\[$]1' | sed -e 's/-Wl,//' -e 's/,/ /'\`; do
						ldopts+=("\[$]{linkarg}")
					done
					;;
				*.lib)
					ldopts+=("\[$]1")
					;;
				-o)
					shift
					ldopts+=("-out:\[$]1")
					;;
				*)
					clopts+=("\[$]1")
					ldopts+=("\[$]1")
					;;
			esac
			shift
		done
		if [[ "\$isdll" -ne 0 ]]; then
			for lib in \[$]{libs[[*]]}; do
				ldopts+=("\[$]lib.dll.lib")
			done
		else
			for lib in \[$]{libs[[*]]}; do
				ldopts+=("\[$]lib.lib")
			done
		fi
		cat <<-EOF
		Creating program
		** ld options:   "\[$]{ldopts[[@]]}"
EOF
		exec \[$]LD \[$]{ldopts[[@]]}
CF_EOF
		chmod +x mk_prog.sh
		LINK_PROGS="$SHELL ${rel_builddir}/mk_prog.sh"
		LINK_TESTS="$SHELL ${rel_builddir}/mk_prog.sh"
		;;
	(mingw*)
		cf_cv_shlib_version=mingw
		cf_cv_shlib_version_infix=mingw
		shlibdir=$bindir
		MAKE_DLLS=
		if test "$DFT_LWR_MODEL" = "shared" ; then
			LOCAL_LDFLAGS="-Wl,--enable-auto-import"
			LOCAL_LDFLAGS2="$LOCAL_LDFLAGS"
			EXTRA_LDFLAGS="-Wl,--enable-auto-import $EXTRA_LDFLAGS"
		fi
		CC_SHARED_OPTS=
		MK_SHARED_LIB=$SHELL' '$rel_builddir'/mk_shared_lib.sh [$]@ [$]{CC} [$]{CFLAGS}'
		RM_SHARED_OPTS="$RM_SHARED_OPTS $rel_builddir/mk_shared_lib.sh *.dll.a"
		cat >mk_shared_lib.sh <<-CF_EOF
		#!$SHELL
		SHARED_LIB=\[$]1
		IMPORT_LIB=\`echo "\[$]1" | sed -e 's/[[0-9]]*\.dll[$]/.dll.a/'\`
		shift
		cat <<-EOF
		Linking shared library
		** SHARED_LIB \[$]SHARED_LIB
		** IMPORT_LIB \[$]IMPORT_LIB
EOF
		exec \[$]* ${LDFLAGS} -shared -Wl,--enable-auto-import,--out-implib=\[$]{IMPORT_LIB} -Wl,--export-all-symbols -o \[$]{SHARED_LIB}
CF_EOF
		chmod +x mk_shared_lib.sh
		;;
	(openbsd[[2-9]].*|mirbsd*)
		if test "$DFT_LWR_MODEL" = "shared" && test -n "$LD_RPATH_OPT" ; then
			LOCAL_LDFLAGS="${LD_RPATH_OPT}\$(LOCAL_LIBDIR)"
			LOCAL_LDFLAGS2="$LOCAL_LDFLAGS"
		fi
		if test "$cf_cv_enable_rpath" = yes ; then
			EXTRA_LDFLAGS="${cf_ld_rpath_opt}\${RPATH_LIST} $EXTRA_LDFLAGS"
		fi
		CC_SHARED_OPTS="$CC_SHARED_OPTS -DPIC"
		CF_SHARED_SONAME
		MK_SHARED_LIB='${CC} ${LDFLAGS} ${CFLAGS} -shared -Wl,-Bshareable,-soname,'$cf_cv_shared_soname',-stats,-lc -o $[@]'
		;;
	(nskJ*)
		CC_SHARED_OPTS=
		MK_SHARED_LIB='${LD} -Wshared -Weld=-export_all -o $[@]'
		;;
	(nskL*)
		CC_SHARED_OPTS=
		MK_SHARED_LIB='${LD} -Wshared -Wxld=-export_all -o $[@]'
		;;
	(nto-qnx*|openbsd*|freebsd[[12]].*)
		CC_SHARED_OPTS="$CC_SHARED_OPTS -DPIC"
		MK_SHARED_LIB='${LD} ${LDFLAGS} -Bshareable -o $[@]'
		test "$cf_cv_shlib_version" = auto && cf_cv_shlib_version=rel
		;;
	(dragonfly*|freebsd*)
		CC_SHARED_OPTS="$CC_SHARED_OPTS -DPIC"
		if test "$DFT_LWR_MODEL" = "shared" && test "$cf_cv_enable_rpath" = yes ; then
			LOCAL_LDFLAGS="${cf_ld_rpath_opt}\$(LOCAL_LIBDIR)"
			LOCAL_LDFLAGS2="${cf_ld_rpath_opt}\${RPATH_LIST} $LOCAL_LDFLAGS"
			EXTRA_LDFLAGS="${cf_ld_rpath_opt}\${RPATH_LIST} $EXTRA_LDFLAGS"
		fi
		CF_SHARED_SONAME
		MK_SHARED_LIB='${CC} ${LDFLAGS} ${CFLAGS} -shared -Wl,-soname,'$cf_cv_shared_soname',-stats,-lc -o $[@]'
		;;
	(netbsd*)
		CC_SHARED_OPTS="$CC_SHARED_OPTS -DPIC"
		if test "$DFT_LWR_MODEL" = "shared" && test "$cf_cv_enable_rpath" = yes ; then
			LOCAL_LDFLAGS="${cf_ld_rpath_opt}\$(LOCAL_LIBDIR)"
			LOCAL_LDFLAGS2="$LOCAL_LDFLAGS"
			EXTRA_LDFLAGS="${cf_ld_rpath_opt}\${RPATH_LIST} $EXTRA_LDFLAGS"
			if test "$cf_cv_shlib_version" = auto; then
			if test -f /usr/libexec/ld.elf_so; then
				cf_cv_shlib_version=abi
			else
				cf_cv_shlib_version=rel
			fi
			fi
			CF_SHARED_SONAME
			MK_SHARED_LIB='${CC} ${LDFLAGS} ${CFLAGS} -shared -Wl,-soname,'$cf_cv_shared_soname' -o $[@]'
		else
			MK_SHARED_LIB='${CC} ${LDFLAGS} ${CFLAGS} -shared -o $[@]'
		fi
		;;
	(osf*|mls+*)
		# tested with OSF/1 V3.2 and 'cc'
		# tested with OSF/1 V3.2 and gcc 2.6.3 (but the c++ demo didn't
		# link with shared libs).
		MK_SHARED_LIB='${LD} ${LDFLAGS} -set_version ${REL_VERSION}:${ABI_VERSION} -expect_unresolved "*" -shared -soname `basename $[@]`'
		case "$host_os" in
		(osf4*)
			MK_SHARED_LIB="${MK_SHARED_LIB} -msym"
			;;
		esac
		MK_SHARED_LIB="${MK_SHARED_LIB}"' -o $[@]'
		if test "$DFT_LWR_MODEL" = "shared" && test -n "$LD_RPATH_OPT" ; then
			LOCAL_LDFLAGS="${LD_RPATH_OPT}\$(LOCAL_LIBDIR)"
			LOCAL_LDFLAGS2="$LOCAL_LDFLAGS"
		fi
		cf_cv_rm_so_locs=yes
		;;
	(sco3.2v5*)  # also uw2* and UW7: hops 13-Apr-98
		# tested with osr5.0.5
		if test "$GCC" != yes; then
			CC_SHARED_OPTS='-belf -KPIC'
		fi
		MK_SHARED_LIB='${LD} ${LDFLAGS} -dy -G -h `basename $[@] .${REL_VERSION}`.${ABI_VERSION} -o [$]@'
		if test "$cf_cv_enable_rpath" = yes ; then
			# only way is to set LD_RUN_PATH but no switch for it
			RUN_PATH=$libdir
		fi
		test "$cf_cv_shlib_version" = auto && cf_cv_shlib_version=rel
		LINK_PROGS='LD_RUN_PATH=${libdir}'
		LINK_TESTS='Pwd=`pwd`;LD_RUN_PATH=`dirname $${Pwd}`/lib'
		;;
	(sunos4*)
		# tested with SunOS 4.1.1 and gcc 2.7.0
		if test "$GCC" != yes; then
			CC_SHARED_OPTS='-KPIC'
		fi
		MK_SHARED_LIB='${LD} ${LDFLAGS} -assert pure-text -o $[@]'
		test "$cf_cv_shlib_version" = auto && cf_cv_shlib_version=rel
		;;
	(solaris2*)
		# tested with SunOS 5.5.1 (solaris 2.5.1) and gcc 2.7.2
		# tested with SunOS 5.10 (solaris 10) and gcc 3.4.3
		if test "$DFT_LWR_MODEL" = "shared" ; then
			LOCAL_LDFLAGS="-R\$(LOCAL_LIBDIR):\${libdir}"
			LOCAL_LDFLAGS2="$LOCAL_LDFLAGS"
		fi
		if test "$cf_cv_enable_rpath" = yes ; then
			EXTRA_LDFLAGS="-R\${libdir} $EXTRA_LDFLAGS"
		fi
		CF_SHARED_SONAME
		if test "$GCC" != yes; then
			cf_save_CFLAGS="$CFLAGS"
			for cf_shared_opts in -xcode=pic32 -xcode=pic13 -KPIC -Kpic -O
			do
				CFLAGS="$cf_shared_opts $cf_save_CFLAGS"
				AC_TRY_COMPILE([#include <stdio.h>],[printf("Hello\\n");],[break])
			done
			CFLAGS="$cf_save_CFLAGS"
			CC_SHARED_OPTS=$cf_shared_opts
			MK_SHARED_LIB='${CC} ${LDFLAGS} ${CFLAGS} -dy -G -Wl,-h,'$cf_cv_shared_soname' -o $[@]'
		else
			MK_SHARED_LIB='${CC} ${LDFLAGS} ${CFLAGS} -shared -dy -G -Wl,-h,'$cf_cv_shared_soname' -o $[@]'
		fi
		;;
	(sysv5uw7*|unix_sv*)
		# tested with UnixWare 7.1.0 (gcc 2.95.2 and cc)
		if test "$GCC" != yes; then
			CC_SHARED_OPTS='-KPIC'
		fi
		MK_SHARED_LIB='${LD} ${LDFLAGS} -d y -G -o [$]@'
		;;
	(*)
		CC_SHARED_OPTS='unknown'
		MK_SHARED_LIB='echo unknown'
		;;
	esac

	# This works if the last tokens in $MK_SHARED_LIB are the -o target.
	case "$cf_cv_shlib_version" in
	(rel|abi)
		case "$MK_SHARED_LIB" in
		(*'-o $[@]')
			test "$cf_cv_do_symlinks" = no && cf_cv_do_symlinks=yes
			;;
		(*)
			AC_MSG_WARN(ignored --with-shlib-version)
			;;
		esac
		;;
	esac

	if test -n "$cf_try_cflags"
	then
cat > conftest.$ac_ext <<EOF
#line __oline__ "${as_me:-configure}"
#include <stdio.h>
int main(int argc, char *argv[[]])
{
	printf("hello\\n");
	return (argv[[argc-1]] == 0) ;
}
EOF
		cf_save_CFLAGS="$CFLAGS"
		for cf_opt in $cf_try_cflags
		do
			CFLAGS="$cf_save_CFLAGS -$cf_opt"
			AC_MSG_CHECKING(if CFLAGS option -$cf_opt works)
			if AC_TRY_EVAL(ac_compile); then
				AC_MSG_RESULT(yes)
				cf_save_CFLAGS="$CFLAGS"
			else
				AC_MSG_RESULT(no)
			fi
		done
		CFLAGS="$cf_save_CFLAGS"
	fi


	# RPATH_LIST is a colon-separated list of directories
	test -n "$cf_ld_rpath_opt" && MK_SHARED_LIB="$MK_SHARED_LIB $cf_ld_rpath_opt\${RPATH_LIST}"
	test -z "$RPATH_LIST" && RPATH_LIST="\${libdir}"

	test "$cf_cv_rm_so_locs" = yes && RM_SHARED_OPTS="$RM_SHARED_OPTS so_locations"

	CF_VERBOSE(CC_SHARED_OPTS: $CC_SHARED_OPTS)
	CF_VERBOSE(MK_SHARED_LIB:  $MK_SHARED_LIB)

	AC_SUBST(CC_SHARED_OPTS)
	AC_SUBST(LD_RPATH_OPT)
	AC_SUBST(LD_SHARED_OPTS)
	AC_SUBST(MK_SHARED_LIB)
	AC_SUBST(RM_SHARED_OPTS)

	AC_SUBST(LINK_PROGS)
	AC_SUBST(LINK_TESTS)

	AC_SUBST(EXTRA_LDFLAGS)
	AC_SUBST(LOCAL_LDFLAGS)
	AC_SUBST(LOCAL_LDFLAGS2)

	AC_SUBST(INSTALL_LIB)
	AC_SUBST(RPATH_LIST)
])dnl