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# LT_PATH_LD and its dependencies adapted with minor modifications
# from libtool.m4 for use in libxmp:
# libtool.m4 - Configure libtool for the host system. -*-Autoconf-*-
#
# Copyright (C) 1996-2001, 2003-2015 Free Software Foundation, Inc.
# Written by Gordon Matzigkeit, 1996
#
# This file is free software; the Free Software Foundation gives
# unlimited permission to copy and/or distribute it, with or without
# modifications, as long as this notice is preserved.
# _LT_PROG_ECHO_BACKSLASH
# -----------------------
# Find how we can fake an echo command that does not interpret backslash.
m4_defun([_LT_PROG_ECHO_BACKSLASH],
[ECHO='\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\'
ECHO=$ECHO$ECHO$ECHO$ECHO$ECHO
ECHO=$ECHO$ECHO$ECHO$ECHO$ECHO$ECHO
AC_MSG_CHECKING([how to print strings])
# Test print first, because it will be a builtin if present.
if test "X`( print -r -- -n ) 2>/dev/null`" = X-n && \
test "X`print -r -- $ECHO 2>/dev/null`" = "X$ECHO"; then
ECHO='print -r --'
elif test "X`printf %s $ECHO 2>/dev/null`" = "X$ECHO"; then
ECHO='printf %s\n'
else
# Use this function as a fallback that always works.
func_fallback_echo ()
{
eval 'cat <<_LTECHO_EOF
$[]1
_LTECHO_EOF'
}
ECHO='func_fallback_echo'
fi
case $ECHO in
printf*) AC_MSG_RESULT([printf]) ;;
print*) AC_MSG_RESULT([print -r]) ;;
*) AC_MSG_RESULT([cat]) ;;
esac
])# _LT_PROG_ECHO_BACKSLASH
# LT_PATH_LD
# ----------
# find the pathname to the GNU or non-GNU linker
AC_DEFUN([LT_PATH_LD],
[AC_REQUIRE([AC_PROG_CC])dnl
AC_REQUIRE([AC_CANONICAL_HOST])dnl
AC_REQUIRE([AC_CANONICAL_BUILD])dnl
AC_REQUIRE([AC_PROG_SED])dnl
AC_REQUIRE([AC_PROG_GREP])dnl
m4_require([_LT_PROG_ECHO_BACKSLASH])dnl
AC_ARG_WITH([gnu-ld],
[AS_HELP_STRING([--with-gnu-ld],
[assume the C compiler uses GNU ld @<:@default=no@:>@])],
[test no = "$withval" || with_gnu_ld=yes],
[with_gnu_ld=no])dnl
ac_prog=ld
if test yes = "$GCC"; then
# Check if gcc -print-prog-name=ld gives a path.
# lose possible carriage return from output.
AC_MSG_CHECKING([for ld used by $CC])
ac_prog=`($CC -print-prog-name=ld) 2>&5 | tr -d '\015'`
case $ac_prog in
# Accept absolute paths.
[[\\/]]* | ?:[[\\/]]*)
re_direlt='/[[^/]][[^/]]*/\.\./'
# Canonicalize the pathname of ld
ac_prog=`$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 yes = "$with_gnu_ld"; then
AC_MSG_CHECKING([for GNU ld])
else
AC_MSG_CHECKING([for non-GNU ld])
fi
AC_CACHE_VAL(lt_cv_path_LD,
[if test -z "$LD"; then
lt_save_ifs=$IFS; IFS=$PATH_SEPARATOR
for ac_dir in $PATH; do
IFS=$lt_save_ifs
test -z "$ac_dir" && ac_dir=.
if test -f "$ac_dir/$ac_prog" || test -f "$ac_dir/$ac_prog$ac_exeext"; then
lt_cv_path_LD=$ac_dir/$ac_prog
# Check to see if the program is GNU ld. I'd rather use --version,
# but apparently some variants of GNU ld only accept -v.
# Break only if it was the GNU/non-GNU ld that we prefer.
case `"$lt_cv_path_LD" -v 2>&1 </dev/null` in
*GNU* | *'with BFD'*)
test no != "$with_gnu_ld" && break
;;
*)
test yes != "$with_gnu_ld" && break
;;
esac
fi
done
IFS=$lt_save_ifs
else
lt_cv_path_LD=$LD # Let the user override the test with a path.
fi])
LD=$lt_cv_path_LD
if test -n "$LD"; then
AC_MSG_RESULT($LD)
else
AC_MSG_RESULT(no)
AC_MSG_WARN([no acceptable ld found in \$PATH])
LD=:
fi
_LT_PATH_LD_GNU
AC_SUBST([LD])
])# LT_PATH_LD
# _LT_PATH_LD_GNU
#- --------------
m4_defun([_LT_PATH_LD_GNU],
[AC_CACHE_CHECK([if the linker ($LD) is GNU ld], lt_cv_prog_gnu_ld,
[# I'd rather use --version here, but apparently some GNU lds only accept -v.
case `$LD -v 2>&1 </dev/null` in
*GNU* | *'with BFD'*)
lt_cv_prog_gnu_ld=yes
;;
*)
lt_cv_prog_gnu_ld=no
;;
esac])
with_gnu_ld=$lt_cv_prog_gnu_ld
])# _LT_PATH_LD_GNU
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