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# lib-ld.m4 serial 2
dnl Copyright (C) 1996-2003 Free Software Foundation, Inc.
dnl This file is free software, distributed under the terms of the GNU
dnl General Public License. As a special exception to the GNU General
dnl Public License, this file may be distributed as part of a program
dnl that contains a configuration script generated by Autoconf, under
dnl the same distribution terms as the rest of that program.
dnl Subroutines of libtool.m4,
dnl with replacements s/AC_/AC_LIB/ and s/lt_cv/acl_cv/ to avoid collision
dnl with libtool.m4.
dnl From libtool-1.4. Sets the variable with_gnu_ld to yes or no.
AC_DEFUN([AC_LIB_PROG_LD_GNU],
[AC_CACHE_CHECK([if the linker ($LD) is GNU ld], acl_cv_prog_gnu_ld,
[# I'd rather use --version here, but apparently some GNU ld's only accept -v.
if $LD -v 2>&1 </dev/null | egrep '(GNU|with BFD)' 1>&5; then
acl_cv_prog_gnu_ld=yes
else
acl_cv_prog_gnu_ld=no
fi])
with_gnu_ld=$acl_cv_prog_gnu_ld
])
dnl From libtool-1.4. Sets the variable LD.
AC_DEFUN([AC_LIB_PROG_LD],
[AC_ARG_WITH(gnu-ld,
[ --with-gnu-ld assume the C compiler uses GNU ld [default=no]],
test "$withval" = no || with_gnu_ld=yes, with_gnu_ld=no)
AC_REQUIRE([AC_PROG_CC])dnl
AC_REQUIRE([AC_CANONICAL_HOST])dnl
ac_prog=ld
if test "$GCC" = yes; then
# Check if gcc -print-prog-name=ld gives a path.
AC_MSG_CHECKING([for ld used by GCC])
case $host in
*-*-mingw*)
# gcc leaves a trailing carriage return which upsets mingw
ac_prog=`($CC -print-prog-name=ld) 2>&5 | tr -d '\015'` ;;
*)
ac_prog=`($CC -print-prog-name=ld) 2>&5` ;;
esac
case $ac_prog in
# Accept absolute paths.
[[\\/]* | [A-Za-z]:[\\/]*)]
[re_direlt='/[^/][^/]*/\.\./']
# Canonicalize the path of ld
ac_prog=`echo $ac_prog| sed 's%\\\\%/%g'`
while echo $ac_prog | grep "$re_direlt" > /dev/null 2>&1; do
ac_prog=`echo $ac_prog| sed "s%$re_direlt%/%"`
done
test -z "$LD" && LD="$ac_prog"
;;
"")
# If it fails, then pretend we aren't using GCC.
ac_prog=ld
;;
*)
# If it is relative, then search for the first ld in PATH.
with_gnu_ld=unknown
;;
esac
elif test "$with_gnu_ld" = yes; then
AC_MSG_CHECKING([for GNU ld])
else
AC_MSG_CHECKING([for non-GNU ld])
fi
AC_CACHE_VAL(acl_cv_path_LD,
[if test -z "$LD"; then
IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}${PATH_SEPARATOR-:}"
for ac_dir in $PATH; do
test -z "$ac_dir" && ac_dir=.
if test -f "$ac_dir/$ac_prog" || test -f "$ac_dir/$ac_prog$ac_exeext"; then
acl_cv_path_LD="$ac_dir/$ac_prog"
# Check to see if the program is GNU ld. I'd rather use --version,
# but apparently some GNU ld's only accept -v.
# Break only if it was the GNU/non-GNU ld that we prefer.
if "$acl_cv_path_LD" -v 2>&1 < /dev/null | egrep '(GNU|with BFD)' > /dev/null; then
test "$with_gnu_ld" != no && break
else
test "$with_gnu_ld" != yes && break
fi
fi
done
IFS="$ac_save_ifs"
else
acl_cv_path_LD="$LD" # Let the user override the test with a path.
fi])
LD="$acl_cv_path_LD"
if test -n "$LD"; then
AC_MSG_RESULT($LD)
else
AC_MSG_RESULT(no)
fi
test -z "$LD" && AC_MSG_ERROR([no acceptable ld found in \$PATH])
AC_LIB_PROG_LD_GNU
])
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