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# lib-link.m4 serial 4 (gettext-0.12)
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dnl Copyright (C) 2001-2003 Free Software Foundation, Inc.
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dnl This file is free software, distributed under the terms of the GNU
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dnl General Public License. As a special exception to the GNU General
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dnl Public License, this file may be distributed as part of a program
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dnl that contains a configuration script generated by Autoconf, under
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dnl the same distribution terms as the rest of that program.
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# lib-link.m4 serial 13 (gettext-0.17)
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dnl Copyright (C) 2001-2007 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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dnl From Bruno Haible.
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dnl AC_LIB_LINKFLAGS(name [, dependencies]) searches for libname and
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dnl the libraries corresponding to explicit and implicit dependencies.
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dnl Sets and AC_SUBSTs the LIB${NAME} and LTLIB${NAME} variables and
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dnl augments the CPPFLAGS variable.
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dnl Sets and AC_SUBSTs the LIB${NAME}_PREFIX variable to nonempty if libname
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dnl was found in ${LIB${NAME}_PREFIX}/$acl_libdirstem.
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AC_DEFUN([AC_LIB_LINKFLAGS],
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AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
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ac_cv_lib[]Name[]_libs="$LIB[]NAME"
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ac_cv_lib[]Name[]_ltlibs="$LTLIB[]NAME"
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ac_cv_lib[]Name[]_cppflags="$INC[]NAME"
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ac_cv_lib[]Name[]_prefix="$LIB[]NAME[]_PREFIX"
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LIB[]NAME="$ac_cv_lib[]Name[]_libs"
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LTLIB[]NAME="$ac_cv_lib[]Name[]_ltlibs"
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INC[]NAME="$ac_cv_lib[]Name[]_cppflags"
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LIB[]NAME[]_PREFIX="$ac_cv_lib[]Name[]_prefix"
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AC_LIB_APPENDTOVAR([CPPFLAGS], [$INC]NAME)
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AC_SUBST([LIB]NAME)
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AC_SUBST([LTLIB]NAME)
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AC_SUBST([LIB]NAME[_PREFIX])
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dnl Also set HAVE_LIB[]NAME so that AC_LIB_HAVE_LINKFLAGS can reuse the
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dnl results of this search when this library appears as a dependency.
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dnl LTLIB${NAME} variables and augments the CPPFLAGS variable, and
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dnl #defines HAVE_LIB${NAME} to 1. Otherwise, it sets and AC_SUBSTs
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dnl HAVE_LIB${NAME}=no and LIB${NAME} and LTLIB${NAME} to empty.
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dnl Sets and AC_SUBSTs the LIB${NAME}_PREFIX variable to nonempty if libname
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dnl was found in ${LIB${NAME}_PREFIX}/$acl_libdirstem.
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AC_DEFUN([AC_LIB_HAVE_LINKFLAGS],
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AC_REQUIRE([AC_LIB_PREPARE_PREFIX])
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CPPFLAGS="$ac_save_CPPFLAGS"
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AC_SUBST([HAVE_LIB]NAME)
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AC_SUBST([LIB]NAME)
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AC_SUBST([LTLIB]NAME)
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AC_SUBST([LIB]NAME[_PREFIX])
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dnl Determine the platform dependent parameters needed to use rpath:
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dnl libext, shlibext, hardcode_libdir_flag_spec, hardcode_libdir_separator,
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dnl hardcode_direct, hardcode_minus_L.
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dnl acl_hardcode_libdir_flag_spec,
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dnl acl_hardcode_libdir_separator,
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dnl acl_hardcode_direct,
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dnl acl_hardcode_minus_L.
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AC_DEFUN([AC_LIB_RPATH],
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dnl Tell automake >= 1.10 to complain if config.rpath is missing.
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m4_ifdef([AC_REQUIRE_AUX_FILE], [AC_REQUIRE_AUX_FILE([config.rpath])])
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AC_REQUIRE([AC_PROG_CC]) dnl we use $CC, $GCC, $LDFLAGS
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AC_REQUIRE([AC_LIB_PROG_LD]) dnl we use $LD, $with_gnu_ld
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AC_REQUIRE([AC_CANONICAL_HOST]) dnl we use $host
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acl_cv_rpath=done
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libext="$acl_cv_libext"
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shlibext="$acl_cv_shlibext"
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hardcode_libdir_flag_spec="$acl_cv_hardcode_libdir_flag_spec"
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hardcode_libdir_separator="$acl_cv_hardcode_libdir_separator"
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hardcode_direct="$acl_cv_hardcode_direct"
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hardcode_minus_L="$acl_cv_hardcode_minus_L"
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acl_libext="$acl_cv_libext"
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acl_shlibext="$acl_cv_shlibext"
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acl_libname_spec="$acl_cv_libname_spec"
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acl_library_names_spec="$acl_cv_library_names_spec"
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acl_hardcode_libdir_flag_spec="$acl_cv_hardcode_libdir_flag_spec"
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acl_hardcode_libdir_separator="$acl_cv_hardcode_libdir_separator"
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acl_hardcode_direct="$acl_cv_hardcode_direct"
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acl_hardcode_minus_L="$acl_cv_hardcode_minus_L"
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dnl Determine whether the user wants rpath handling at all.
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AC_ARG_ENABLE(rpath,
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[ --disable-rpath do not hardcode runtime library paths],
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dnl AC_LIB_LINKFLAGS_BODY(name [, dependencies]) searches for libname and
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dnl the libraries corresponding to explicit and implicit dependencies.
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dnl Sets the LIB${NAME}, LTLIB${NAME} and INC${NAME} variables.
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dnl Also, sets the LIB${NAME}_PREFIX variable to nonempty if libname was found
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dnl in ${LIB${NAME}_PREFIX}/$acl_libdirstem.
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AC_DEFUN([AC_LIB_LINKFLAGS_BODY],
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AC_REQUIRE([AC_LIB_PREPARE_MULTILIB])
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define([NAME],[translit([$1],[abcdefghijklmnopqrstuvwxyz./-],
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[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])])
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dnl Autoconf >= 2.61 supports dots in --with options.
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define([N_A_M_E],[m4_if(m4_version_compare(m4_defn([m4_PACKAGE_VERSION]),[2.61]),[-1],[translit([$1],[.],[_])],[$1])])
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dnl By default, look in $includedir and $libdir.
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use_additional=yes
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AC_LIB_WITH_FINAL_PREFIX([
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eval additional_includedir=\"$includedir\"
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eval additional_libdir=\"$libdir\"
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AC_LIB_ARG_WITH([lib$1-prefix],
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[ --with-lib$1-prefix[=DIR] search for lib$1 in DIR/include and DIR/lib
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--without-lib$1-prefix don't search for lib$1 in includedir and libdir],
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AC_LIB_ARG_WITH([lib]N_A_M_E[-prefix],
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[ --with-lib]N_A_M_E[-prefix[=DIR] search for lib$1 in DIR/include and DIR/lib
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--without-lib]N_A_M_E[-prefix don't search for lib$1 in includedir and libdir],
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if test "X$withval" = "Xno"; then
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use_additional=no
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eval libname=\"$acl_libname_spec\" # typically: libname=lib$name
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if test -n "$acl_shlibext"; then
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shrext=".$acl_shlibext" # typically: shrext=.so
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if test $use_additional = yes; then
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if test -n "$shlibext" && test -f "$additional_libdir/lib$name.$shlibext"; then
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found_dir="$additional_libdir"
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found_so="$additional_libdir/lib$name.$shlibext"
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if test -f "$additional_libdir/lib$name.la"; then
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found_la="$additional_libdir/lib$name.la"
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if test -f "$additional_libdir/lib$name.$libext"; then
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found_dir="$additional_libdir"
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found_a="$additional_libdir/lib$name.$libext"
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if test -f "$additional_libdir/lib$name.la"; then
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found_la="$additional_libdir/lib$name.la"
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dir="$additional_libdir"
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dnl The same code as in the loop below:
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dnl First look for a shared library.
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if test -n "$acl_shlibext"; then
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if test -f "$dir/$libname$shrext"; then
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found_so="$dir/$libname$shrext"
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if test "$acl_library_names_spec" = '$libname$shrext$versuffix'; then
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for f in "$libname$shrext".*; do echo "$f"; done \
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| sed -e "s,^$libname$shrext\\\\.,," \
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| sort -t '.' -n -r -k1,1 -k2,2 -k3,3 -k4,4 -k5,5 \
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| sed 1q ) 2>/dev/null`
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if test -n "$ver" && test -f "$dir/$libname$shrext.$ver"; then
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found_so="$dir/$libname$shrext.$ver"
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eval library_names=\"$acl_library_names_spec\"
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for f in $library_names; do
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if test -f "$dir/$f"; then
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dnl Then look for a static library.
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if test "X$found_dir" = "X"; then
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if test -f "$dir/$libname.$acl_libext"; then
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found_a="$dir/$libname.$acl_libext"
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if test "X$found_dir" != "X"; then
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if test -f "$dir/$libname.la"; then
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found_la="$dir/$libname.la"
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if test "X$found_dir" = "X"; then
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for x in $LDFLAGS $LTLIB[]NAME; do
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dir=`echo "X$x" | sed -e 's/^X-L//'`
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if test -n "$shlibext" && test -f "$dir/lib$name.$shlibext"; then
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found_so="$dir/lib$name.$shlibext"
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if test -f "$dir/lib$name.la"; then
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found_la="$dir/lib$name.la"
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if test -f "$dir/lib$name.$libext"; then
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dnl First look for a shared library.
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if test -n "$acl_shlibext"; then
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if test -f "$dir/$libname$shrext"; then
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found_a="$dir/lib$name.$libext"
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if test -f "$dir/lib$name.la"; then
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found_la="$dir/lib$name.la"
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found_so="$dir/$libname$shrext"
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if test "$acl_library_names_spec" = '$libname$shrext$versuffix'; then
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for f in "$libname$shrext".*; do echo "$f"; done \
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| sed -e "s,^$libname$shrext\\\\.,," \
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| sort -t '.' -n -r -k1,1 -k2,2 -k3,3 -k4,4 -k5,5 \
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| sed 1q ) 2>/dev/null`
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if test -n "$ver" && test -f "$dir/$libname$shrext.$ver"; then
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found_so="$dir/$libname$shrext.$ver"
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eval library_names=\"$acl_library_names_spec\"
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for f in $library_names; do
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if test -f "$dir/$f"; then
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dnl Then look for a static library.
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if test "X$found_dir" = "X"; then
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if test -f "$dir/$libname.$acl_libext"; then
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found_a="$dir/$libname.$acl_libext"
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if test "X$found_dir" != "X"; then
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if test -f "$dir/$libname.la"; then
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found_la="$dir/$libname.la"
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if test "X$found_dir" != "X"; then
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dnl Linking with a shared library. We attempt to hardcode its
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dnl directory into the executable's runpath, unless it's the
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dnl standard /usr/lib.
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if test "$enable_rpath" = no || test "X$found_dir" = "X/usr/lib"; then
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if test "$enable_rpath" = no || test "X$found_dir" = "X/usr/$acl_libdirstem"; then
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dnl No hardcoding is needed.
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LIB[]NAME="${LIB[]NAME}${LIB[]NAME:+ }$found_so"
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ltrpathdirs="$ltrpathdirs $found_dir"
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dnl The hardcoding into $LIBNAME is system dependent.
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if test "$hardcode_direct" = yes; then
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if test "$acl_hardcode_direct" = yes; then
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dnl Using DIR/libNAME.so during linking hardcodes DIR into the
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dnl resulting binary.
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LIB[]NAME="${LIB[]NAME}${LIB[]NAME:+ }$found_so"
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if test -n "$hardcode_libdir_flag_spec" && test "$hardcode_minus_L" = no; then
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if test -n "$acl_hardcode_libdir_flag_spec" && test "$acl_hardcode_minus_L" = no; then
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dnl Use an explicit option to hardcode DIR into the resulting
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LIB[]NAME="${LIB[]NAME}${LIB[]NAME:+ }$found_so"
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if test -z "$haveit"; then
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LIB[]NAME="${LIB[]NAME}${LIB[]NAME:+ }-L$found_dir"
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if test "$hardcode_minus_L" != no; then
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if test "$acl_hardcode_minus_L" != no; then
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dnl FIXME: Not sure whether we should use
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dnl "-L$found_dir -l$name" or "-L$found_dir $found_so"
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LIB[]NAME="${LIB[]NAME}${LIB[]NAME:+ }$found_so"
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dnl We cannot use $hardcode_runpath_var and LD_RUN_PATH
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dnl We cannot use $acl_hardcode_runpath_var and LD_RUN_PATH
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dnl here, because this doesn't fit in flags passed to the
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dnl compiler. So give up. No hardcoding. This affects only
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dnl very old systems.
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dnl Assume the include files are nearby.
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additional_includedir=
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case "$found_dir" in
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basedir=`echo "X$found_dir" | sed -e 's,^X,,' -e 's,/lib/*$,,'`
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*/$acl_libdirstem | */$acl_libdirstem/)
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basedir=`echo "X$found_dir" | sed -e 's,^X,,' -e "s,/$acl_libdirstem/"'*$,,'`
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LIB[]NAME[]_PREFIX="$basedir"
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additional_includedir="$basedir/include"
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dnl 3. if it's already present in $LDFLAGS or the already
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dnl constructed $LIBNAME,
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dnl 4. if it doesn't exist as a directory.
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if test "X$additional_libdir" != "X/usr/lib"; then
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if test "X$additional_libdir" != "X/usr/$acl_libdirstem"; then
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if test "X$additional_libdir" = "X/usr/local/lib"; then
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if test "X$additional_libdir" = "X/usr/local/$acl_libdirstem"; then
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if test -n "$GCC"; then
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linux* | gnu* | k*bsd*-gnu) haveit=yes;;
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if test "X$rpathdirs" != "X"; then
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if test -n "$hardcode_libdir_separator"; then
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if test -n "$acl_hardcode_libdir_separator"; then
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dnl Weird platform: only the last -rpath option counts, the user must
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dnl pass all path elements in one option. We can arrange that for a
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dnl single library, but not when more than one $LIBNAMEs are used.
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for found_dir in $rpathdirs; do
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alldirs="${alldirs}${alldirs:+$hardcode_libdir_separator}$found_dir"
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alldirs="${alldirs}${alldirs:+$acl_hardcode_libdir_separator}$found_dir"
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dnl Note: hardcode_libdir_flag_spec uses $libdir and $wl.
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dnl Note: acl_hardcode_libdir_flag_spec uses $libdir and $wl.
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acl_save_libdir="$libdir"
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libdir="$alldirs"
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eval flag=\"$hardcode_libdir_flag_spec\"
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eval flag=\"$acl_hardcode_libdir_flag_spec\"
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libdir="$acl_save_libdir"
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LIB[]NAME="${LIB[]NAME}${LIB[]NAME:+ }$flag"
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for found_dir in $rpathdirs; do
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acl_save_libdir="$libdir"
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libdir="$found_dir"
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eval flag=\"$hardcode_libdir_flag_spec\"
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eval flag=\"$acl_hardcode_libdir_flag_spec\"
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libdir="$acl_save_libdir"
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LIB[]NAME="${LIB[]NAME}${LIB[]NAME:+ }$flag"
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dnl For those cases where a variable contains several -L and -l options
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dnl referring to unknown libraries and directories, this macro determines the
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dnl necessary additional linker options for the runtime path.
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dnl AC_LIB_LINKFLAGS_FROM_LIBS([LDADDVAR], [LIBSVALUE], [USE-LIBTOOL])
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dnl sets LDADDVAR to linker options needed together with LIBSVALUE.
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dnl If USE-LIBTOOL evaluates to non-empty, linking with libtool is assumed,
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dnl otherwise linking without libtool is assumed.
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AC_DEFUN([AC_LIB_LINKFLAGS_FROM_LIBS],
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AC_REQUIRE([AC_LIB_RPATH])
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AC_REQUIRE([AC_LIB_PREPARE_MULTILIB])
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if test "$enable_rpath" != no; then
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if test -n "$acl_hardcode_libdir_flag_spec" && test "$acl_hardcode_minus_L" = no; then
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dnl Use an explicit option to hardcode directories into the resulting
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if test -n "$next"; then
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dnl No need to hardcode the standard /usr/lib.
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if test "X$dir" != "X/usr/$acl_libdirstem"; then
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rpathdirs="$rpathdirs $dir"
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-L*) dir=`echo "X$opt" | sed -e 's,^X-L,,'`
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dnl No need to hardcode the standard /usr/lib.
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if test "X$dir" != "X/usr/$acl_libdirstem"; then
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rpathdirs="$rpathdirs $dir"
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if test "X$rpathdirs" != "X"; then
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if test -n ""$3""; then
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dnl libtool is used for linking. Use -R options.
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for dir in $rpathdirs; do
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$1="${$1}${$1:+ }-R$dir"
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dnl The linker is used for linking directly.
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if test -n "$acl_hardcode_libdir_separator"; then
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dnl Weird platform: only the last -rpath option counts, the user
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dnl must pass all path elements in one option.
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for dir in $rpathdirs; do
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alldirs="${alldirs}${alldirs:+$acl_hardcode_libdir_separator}$dir"
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acl_save_libdir="$libdir"
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eval flag=\"$acl_hardcode_libdir_flag_spec\"
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libdir="$acl_save_libdir"
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dnl The -rpath options are cumulative.
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for dir in $rpathdirs; do
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acl_save_libdir="$libdir"
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eval flag=\"$acl_hardcode_libdir_flag_spec\"
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libdir="$acl_save_libdir"
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$1="${$1}${$1:+ }$flag"
added
removed
m4/lib-link.m4
