# lib-ld.m4 serial 9 dnl Copyright (C) 1996-2003, 2009-2020 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=$PATH; sh -c :) >/dev/null 2>&1 \ || PATH_SEPARATOR=';' } fi if test -n "$LD"; then AC_MSG_CHECKING([for ld]) elif test "$GCC" = yes; then AC_MSG_CHECKING([for ld used by $CC]) elif test "$with_gnu_ld" = yes; then AC_MSG_CHECKING([for GNU ld]) else AC_MSG_CHECKING([for non-GNU ld]) fi if test -n "$LD"; then # Let the user override the test with a path. : else AC_CACHE_VAL([acl_cv_path_LD], [ acl_cv_path_LD= # Final result of this test ac_prog=ld # Program to search in $PATH if test "$GCC" = yes; then # Check if gcc -print-prog-name=ld gives a path. case $host in *-*-mingw*) # gcc leaves a trailing carriage return which upsets mingw acl_output=`($CC -print-prog-name=ld) 2>&5 | tr -d '\015'` ;; *) acl_output=`($CC -print-prog-name=ld) 2>&5` ;; esac case $acl_output in # Accept absolute paths. [[\\/]]* | ?:[[\\/]]*) re_direlt='/[[^/]][[^/]]*/\.\./' # Canonicalize the pathname of ld acl_output=`echo "$acl_output" | sed 's%\\\\%/%g'` while echo "$acl_output" | grep "$re_direlt" > /dev/null 2>&1; do acl_output=`echo $acl_output | sed "s%$re_direlt%/%"` done # Got the pathname. No search in PATH is needed. acl_cv_path_LD="$acl_output" ac_prog= ;; "") # If it fails, then pretend we aren't using GCC. ;; *) # If it is relative, then search for the first ld in PATH. with_gnu_ld=unknown ;; esac fi if test -n "$ac_prog"; then # Search for $ac_prog in $PATH. acl_save_ifs="$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" fi case $host in *-*-aix*) AC_COMPILE_IFELSE( [AC_LANG_SOURCE( [[#if defined __powerpc64__ || defined _ARCH_PPC64 int ok; #else error fail #endif ]])], [# The compiler produces 64-bit code. Add option '-b64' so that the # linker groks 64-bit object files. case "$acl_cv_path_LD " in *" -b64 "*) ;; *) acl_cv_path_LD="$acl_cv_path_LD -b64" ;; esac ], []) ;; sparc64-*-netbsd*) AC_COMPILE_IFELSE( [AC_LANG_SOURCE( [[#if defined __sparcv9 || defined __arch64__ int ok; #else error fail #endif ]])], [], [# The compiler produces 32-bit code. Add option '-m elf32_sparc' # so that the linker groks 32-bit object files. case "$acl_cv_path_LD " in *" -m elf32_sparc "*) ;; *) acl_cv_path_LD="$acl_cv_path_LD -m elf32_sparc" ;; esac ]) ;; esac ]) LD="$acl_cv_path_LD" fi if test -n "$LD"; then AC_MSG_RESULT([$LD]) else AC_MSG_RESULT([no]) AC_MSG_ERROR([no acceptable ld found in \$PATH]) fi AC_LIB_PROG_LD_GNU ])