120 lines
3.6 KiB
Plaintext
120 lines
3.6 KiB
Plaintext
# lib-ld.m4 serial 6
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dnl Copyright (C) 1996-2003, 2009-2016 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 Subroutines of libtool.m4,
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dnl with replacements s/_*LT_PATH/AC_LIB_PROG/ and s/lt_/acl_/ to avoid
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dnl collision with libtool.m4.
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dnl From libtool-2.4. Sets the variable with_gnu_ld to yes or no.
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AC_DEFUN([AC_LIB_PROG_LD_GNU],
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[AC_CACHE_CHECK([if the linker ($LD) is GNU ld], [acl_cv_prog_gnu_ld],
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[# I'd rather use --version here, but apparently some GNU lds only accept -v.
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case `$LD -v 2>&1 </dev/null` in
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*GNU* | *'with BFD'*)
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acl_cv_prog_gnu_ld=yes
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;;
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*)
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acl_cv_prog_gnu_ld=no
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;;
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esac])
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with_gnu_ld=$acl_cv_prog_gnu_ld
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])
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dnl From libtool-2.4. Sets the variable LD.
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AC_DEFUN([AC_LIB_PROG_LD],
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[AC_REQUIRE([AC_PROG_CC])dnl
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AC_REQUIRE([AC_CANONICAL_HOST])dnl
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AC_ARG_WITH([gnu-ld],
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[AS_HELP_STRING([--with-gnu-ld],
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[assume the C compiler uses GNU ld [default=no]])],
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[test "$withval" = no || with_gnu_ld=yes],
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[with_gnu_ld=no])dnl
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# Prepare PATH_SEPARATOR.
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# The user is always right.
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if test "${PATH_SEPARATOR+set}" != set; then
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# Determine PATH_SEPARATOR by trying to find /bin/sh in a PATH which
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# contains only /bin. Note that ksh looks also at the FPATH variable,
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# so we have to set that as well for the test.
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PATH_SEPARATOR=:
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(PATH='/bin;/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 \
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&& { (PATH='/bin:/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 \
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|| PATH_SEPARATOR=';'
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}
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fi
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ac_prog=ld
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if test "$GCC" = yes; then
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# Check if gcc -print-prog-name=ld gives a path.
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AC_MSG_CHECKING([for ld used by $CC])
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case $host in
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*-*-mingw*)
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# gcc leaves a trailing carriage return which upsets mingw
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ac_prog=`($CC -print-prog-name=ld) 2>&5 | tr -d '\015'` ;;
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*)
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ac_prog=`($CC -print-prog-name=ld) 2>&5` ;;
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esac
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case $ac_prog in
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# Accept absolute paths.
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[[\\/]]* | ?:[[\\/]]*)
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re_direlt='/[[^/]][[^/]]*/\.\./'
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# Canonicalize the pathname of ld
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ac_prog=`echo "$ac_prog"| sed 's%\\\\%/%g'`
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while echo "$ac_prog" | grep "$re_direlt" > /dev/null 2>&1; do
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ac_prog=`echo $ac_prog| sed "s%$re_direlt%/%"`
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done
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test -z "$LD" && LD="$ac_prog"
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;;
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"")
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# If it fails, then pretend we aren't using GCC.
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ac_prog=ld
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;;
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*)
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# If it is relative, then search for the first ld in PATH.
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with_gnu_ld=unknown
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;;
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esac
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elif test "$with_gnu_ld" = yes; then
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AC_MSG_CHECKING([for GNU ld])
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else
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AC_MSG_CHECKING([for non-GNU ld])
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fi
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AC_CACHE_VAL([acl_cv_path_LD],
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[if test -z "$LD"; then
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acl_save_ifs="$IFS"; IFS=$PATH_SEPARATOR
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for ac_dir in $PATH; do
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IFS="$acl_save_ifs"
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test -z "$ac_dir" && ac_dir=.
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if test -f "$ac_dir/$ac_prog" || test -f "$ac_dir/$ac_prog$ac_exeext"; then
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acl_cv_path_LD="$ac_dir/$ac_prog"
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# Check to see if the program is GNU ld. I'd rather use --version,
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# but apparently some variants of GNU ld only accept -v.
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# Break only if it was the GNU/non-GNU ld that we prefer.
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case `"$acl_cv_path_LD" -v 2>&1 </dev/null` in
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*GNU* | *'with BFD'*)
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test "$with_gnu_ld" != no && break
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;;
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*)
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test "$with_gnu_ld" != yes && break
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;;
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esac
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fi
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done
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IFS="$acl_save_ifs"
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else
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acl_cv_path_LD="$LD" # Let the user override the test with a path.
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fi])
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LD="$acl_cv_path_LD"
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if test -n "$LD"; then
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AC_MSG_RESULT([$LD])
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else
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AC_MSG_RESULT([no])
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fi
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test -z "$LD" && AC_MSG_ERROR([no acceptable ld found in \$PATH])
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AC_LIB_PROG_LD_GNU
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])
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