1 # lib-ld.m4 serial 6 2 dnl Copyright (C) 1996-2003, 2009-2012 Free Software Foundation, Inc. 3 dnl This file is free software; the Free Software Foundation 4 dnl gives unlimited permission to copy and/or distribute it, 5 dnl with or without modifications, as long as this notice is preserved. 6 7 dnl Subroutines of libtool.m4, 8 dnl with replacements s/_*LT_PATH/AC_LIB_PROG/ and s/lt_/acl_/ to avoid 9 dnl collision with libtool.m4. 10 11 dnl From libtool-2.4. Sets the variable with_gnu_ld to yes or no. 12 AC_DEFUN([AC_LIB_PROG_LD_GNU], 13 [AC_CACHE_CHECK([if the linker ($LD) is GNU ld], [acl_cv_prog_gnu_ld], 14 [# I'd rather use --version here, but apparently some GNU lds only accept -v. 15 case `$LD -v 2>&1 </dev/null` in 16 *GNU* | *'with BFD'*) 17 acl_cv_prog_gnu_ld=yes 18 ;; 19 *) 20 acl_cv_prog_gnu_ld=no 21 ;; 22 esac]) 23 with_gnu_ld=$acl_cv_prog_gnu_ld 24 ]) 25 26 dnl From libtool-2.4. Sets the variable LD. 27 AC_DEFUN([AC_LIB_PROG_LD], 28 [AC_REQUIRE([AC_PROG_CC])dnl 29 AC_REQUIRE([AC_CANONICAL_HOST])dnl 30 31 AC_ARG_WITH([gnu-ld], 32 [AS_HELP_STRING([--with-gnu-ld], 33 [assume the C compiler uses GNU ld [default=no]])], 34 [test "$withval" = no || with_gnu_ld=yes], 35 [with_gnu_ld=no])dnl 36 37 # Prepare PATH_SEPARATOR. 38 # The user is always right. 39 if test "${PATH_SEPARATOR+set}" != set; then 40 # Determine PATH_SEPARATOR by trying to find /bin/sh in a PATH which 41 # contains only /bin. Note that ksh looks also at the FPATH variable, 42 # so we have to set that as well for the test. 43 PATH_SEPARATOR=: 44 (PATH='/bin;/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 \ 45 && { (PATH='/bin:/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 \ 46 || PATH_SEPARATOR=';' 47 } 48 fi 49 50 ac_prog=ld 51 if test "$GCC" = yes; then 52 # Check if gcc -print-prog-name=ld gives a path. 53 AC_MSG_CHECKING([for ld used by $CC]) 54 case $host in 55 *-*-mingw*) 56 # gcc leaves a trailing carriage return which upsets mingw 57 ac_prog=`($CC -print-prog-name=ld) 2>&5 | tr -d '\015'` ;; 58 *) 59 ac_prog=`($CC -print-prog-name=ld) 2>&5` ;; 60 esac 61 case $ac_prog in 62 # Accept absolute paths. 63 [[\\/]]* | ?:[[\\/]]*) 64 re_direlt='/[[^/]][[^/]]*/\.\./' 65 # Canonicalize the pathname of ld 66 ac_prog=`echo "$ac_prog"| sed 's%\\\\%/%g'` 67 while echo "$ac_prog" | grep "$re_direlt" > /dev/null 2>&1; do 68 ac_prog=`echo $ac_prog| sed "s%$re_direlt%/%"` 69 done 70 test -z "$LD" && LD="$ac_prog" 71 ;; 72 "") 73 # If it fails, then pretend we aren't using GCC. 74 ac_prog=ld 75 ;; 76 *) 77 # If it is relative, then search for the first ld in PATH. 78 with_gnu_ld=unknown 79 ;; 80 esac 81 elif test "$with_gnu_ld" = yes; then 82 AC_MSG_CHECKING([for GNU ld]) 83 else 84 AC_MSG_CHECKING([for non-GNU ld]) 85 fi 86 AC_CACHE_VAL([acl_cv_path_LD], 87 [if test -z "$LD"; then 88 acl_save_ifs="$IFS"; IFS=$PATH_SEPARATOR 89 for ac_dir in $PATH; do 90 IFS="$acl_save_ifs" 91 test -z "$ac_dir" && ac_dir=. 92 if test -f "$ac_dir/$ac_prog" || test -f "$ac_dir/$ac_prog$ac_exeext"; then 93 acl_cv_path_LD="$ac_dir/$ac_prog" 94 # Check to see if the program is GNU ld. I'd rather use --version, 95 # but apparently some variants of GNU ld only accept -v. 96 # Break only if it was the GNU/non-GNU ld that we prefer. 97 case `"$acl_cv_path_LD" -v 2>&1 </dev/null` in 98 *GNU* | *'with BFD'*) 99 test "$with_gnu_ld" != no && break 100 ;; 101 *) 102 test "$with_gnu_ld" != yes && break 103 ;; 104 esac 105 fi 106 done 107 IFS="$acl_save_ifs" 108 else 109 acl_cv_path_LD="$LD" # Let the user override the test with a path. 110 fi]) 111 LD="$acl_cv_path_LD" 112 if test -n "$LD"; then 113 AC_MSG_RESULT([$LD]) 114 else 115 AC_MSG_RESULT([no]) 116 fi 117 test -z "$LD" && AC_MSG_ERROR([no acceptable ld found in \$PATH]) 118 AC_LIB_PROG_LD_GNU 119 ]) 120
