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119 lines
3.6 KiB
119 lines
3.6 KiB
# lib-ld.m4 serial 6 |
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dnl Copyright (C) 1996-2003, 2009-2017 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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