| # lib-ld.m4 serial 6 |
| dnl Copyright (C) 1996-2003, 2009-2016 Free Software Foundation, Inc. |
| dnl This file is free software; the Free Software Foundation |
| dnl gives unlimited permission to copy and/or distribute it, |
| dnl with or without modifications, as long as this notice is preserved. |
| |
| dnl Subroutines of libtool.m4, |
| dnl with replacements s/_*LT_PATH/AC_LIB_PROG/ and s/lt_/acl_/ to avoid |
| dnl collision with libtool.m4. |
| |
| dnl From libtool-2.4. Sets the variable with_gnu_ld to yes or no. |
| AC_DEFUN([AC_LIB_PROG_LD_GNU], |
| [AC_CACHE_CHECK([if the linker ($LD) is GNU ld], [acl_cv_prog_gnu_ld], |
| [# I'd rather use --version here, but apparently some GNU lds only accept -v. |
| case `$LD -v 2>&1 </dev/null` in |
| *GNU* | *'with BFD'*) |
| acl_cv_prog_gnu_ld=yes |
| ;; |
| *) |
| acl_cv_prog_gnu_ld=no |
| ;; |
| esac]) |
| with_gnu_ld=$acl_cv_prog_gnu_ld |
| ]) |
| |
| dnl From libtool-2.4. Sets the variable LD. |
| AC_DEFUN([AC_LIB_PROG_LD], |
| [AC_REQUIRE([AC_PROG_CC])dnl |
| AC_REQUIRE([AC_CANONICAL_HOST])dnl |
| |
| AC_ARG_WITH([gnu-ld], |
| [AS_HELP_STRING([--with-gnu-ld], |
| [assume the C compiler uses GNU ld [default=no]])], |
| [test "$withval" = no || with_gnu_ld=yes], |
| [with_gnu_ld=no])dnl |
| |
| # Prepare PATH_SEPARATOR. |
| # The user is always right. |
| if test "${PATH_SEPARATOR+set}" != set; then |
| # Determine PATH_SEPARATOR by trying to find /bin/sh in a PATH which |
| # contains only /bin. Note that ksh looks also at the FPATH variable, |
| # so we have to set that as well for the test. |
| PATH_SEPARATOR=: |
| (PATH='/bin;/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 \ |
| && { (PATH='/bin:/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 \ |
| || PATH_SEPARATOR=';' |
| } |
| fi |
| |
| ac_prog=ld |
| if test "$GCC" = yes; then |
| # Check if gcc -print-prog-name=ld gives a path. |
| AC_MSG_CHECKING([for ld used by $CC]) |
| 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 $ac_prog in |
| # Accept absolute paths. |
| [[\\/]]* | ?:[[\\/]]*) |
| re_direlt='/[[^/]][[^/]]*/\.\./' |
| # Canonicalize the pathname of ld |
| ac_prog=`echo "$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 "$with_gnu_ld" = yes; then |
| AC_MSG_CHECKING([for GNU ld]) |
| else |
| AC_MSG_CHECKING([for non-GNU ld]) |
| fi |
| AC_CACHE_VAL([acl_cv_path_LD], |
| [if test -z "$LD"; then |
| acl_save_ifs="$IFS"; IFS=$PATH_SEPARATOR |
| for ac_dir in $PATH; do |
| IFS="$acl_save_ifs" |
| 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 variants of GNU ld only accept -v. |
| # Break only if it was the GNU/non-GNU ld that we prefer. |
| case `"$acl_cv_path_LD" -v 2>&1 </dev/null` in |
| *GNU* | *'with BFD'*) |
| test "$with_gnu_ld" != no && break |
| ;; |
| *) |
| test "$with_gnu_ld" != yes && break |
| ;; |
| esac |
| fi |
| done |
| IFS="$acl_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 |
| ]) |