lib-ld.m4 (5440B)
1 # lib-ld.m4 2 # serial 13 3 dnl Copyright (C) 1996-2003, 2009-2024 Free Software Foundation, Inc. 4 dnl This file is free software; the Free Software Foundation 5 dnl gives unlimited permission to copy and/or distribute it, 6 dnl with or without modifications, as long as this notice is preserved. 7 dnl This file is offered as-is, without any warranty. 8 9 dnl Subroutines of libtool.m4, 10 dnl with replacements s/_*LT_PATH/AC_LIB_PROG/ and s/lt_/acl_/ to avoid 11 dnl collision with libtool.m4. 12 13 dnl From libtool-2.4. Sets the variable with_gnu_ld to yes or no. 14 AC_DEFUN([AC_LIB_PROG_LD_GNU], 15 [AC_CACHE_CHECK([if the linker ($LD) is GNU ld], [acl_cv_prog_gnu_ld], 16 [# I'd rather use --version here, but apparently some GNU lds only accept -v. 17 case `$LD -v 2>&1 </dev/null` in 18 *GNU* | *'with BFD'*) 19 acl_cv_prog_gnu_ld=yes 20 ;; 21 *) 22 acl_cv_prog_gnu_ld=no 23 ;; 24 esac]) 25 with_gnu_ld=$acl_cv_prog_gnu_ld 26 ]) 27 28 dnl From libtool-2.4. Sets the variable LD. 29 AC_DEFUN([AC_LIB_PROG_LD], 30 [AC_REQUIRE([AC_PROG_CC])dnl 31 AC_REQUIRE([AC_CANONICAL_HOST])dnl 32 33 AC_ARG_WITH([gnu-ld], 34 [AS_HELP_STRING([[--with-gnu-ld]], 35 [assume the C compiler uses GNU ld [default=no]])], 36 [test "$withval" = no || with_gnu_ld=yes], 37 [with_gnu_ld=no])dnl 38 39 # Prepare PATH_SEPARATOR. 40 # The user is always right. 41 if test "${PATH_SEPARATOR+set}" != set; then 42 # Determine PATH_SEPARATOR by trying to find /bin/sh in a PATH which 43 # contains only /bin. Note that ksh looks also at the FPATH variable, 44 # so we have to set that as well for the test. 45 PATH_SEPARATOR=: 46 (PATH='/bin;/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 \ 47 && { (PATH='/bin:/bin'; FPATH=$PATH; sh -c :) >/dev/null 2>&1 \ 48 || PATH_SEPARATOR=';' 49 } 50 fi 51 52 if test -n "$LD"; then 53 AC_MSG_CHECKING([for ld]) 54 elif test "$GCC" = yes; then 55 AC_MSG_CHECKING([for ld used by $CC]) 56 elif test "$with_gnu_ld" = yes; then 57 AC_MSG_CHECKING([for GNU ld]) 58 else 59 AC_MSG_CHECKING([for non-GNU ld]) 60 fi 61 if test -n "$LD"; then 62 # Let the user override the test with a path. 63 : 64 else 65 AC_CACHE_VAL([acl_cv_path_LD], 66 [ 67 acl_cv_path_LD= # Final result of this test 68 ac_prog=ld # Program to search in $PATH 69 if test "$GCC" = yes; then 70 # Check if gcc -print-prog-name=ld gives a path. 71 case $host in 72 *-*-mingw* | windows*) 73 # gcc leaves a trailing carriage return which upsets mingw 74 acl_output=`($CC -print-prog-name=ld) 2>&5 | tr -d '\015'` ;; 75 *) 76 acl_output=`($CC -print-prog-name=ld) 2>&5` ;; 77 esac 78 case $acl_output in 79 # Accept absolute paths. 80 [[\\/]]* | ?:[[\\/]]*) 81 re_direlt='/[[^/]][[^/]]*/\.\./' 82 # Canonicalize the pathname of ld 83 acl_output=`echo "$acl_output" | sed 's%\\\\%/%g'` 84 while echo "$acl_output" | grep "$re_direlt" > /dev/null 2>&1; do 85 acl_output=`echo $acl_output | sed "s%$re_direlt%/%"` 86 done 87 # Got the pathname. No search in PATH is needed. 88 acl_cv_path_LD="$acl_output" 89 ac_prog= 90 ;; 91 "") 92 # If it fails, then pretend we aren't using GCC. 93 ;; 94 *) 95 # If it is relative, then search for the first ld in PATH. 96 with_gnu_ld=unknown 97 ;; 98 esac 99 fi 100 if test -n "$ac_prog"; then 101 # Search for $ac_prog in $PATH. 102 acl_saved_IFS="$IFS"; IFS=$PATH_SEPARATOR 103 for ac_dir in $PATH; do 104 IFS="$acl_saved_IFS" 105 test -z "$ac_dir" && ac_dir=. 106 if test -f "$ac_dir/$ac_prog" || test -f "$ac_dir/$ac_prog$ac_exeext"; then 107 acl_cv_path_LD="$ac_dir/$ac_prog" 108 # Check to see if the program is GNU ld. I'd rather use --version, 109 # but apparently some variants of GNU ld only accept -v. 110 # Break only if it was the GNU/non-GNU ld that we prefer. 111 case `"$acl_cv_path_LD" -v 2>&1 </dev/null` in 112 *GNU* | *'with BFD'*) 113 test "$with_gnu_ld" != no && break 114 ;; 115 *) 116 test "$with_gnu_ld" != yes && break 117 ;; 118 esac 119 fi 120 done 121 IFS="$acl_saved_IFS" 122 fi 123 case $host in 124 *-*-aix*) 125 AC_COMPILE_IFELSE( 126 [AC_LANG_SOURCE( 127 [[#if defined __powerpc64__ || defined __LP64__ 128 int ok; 129 #else 130 error fail 131 #endif 132 ]])], 133 [# The compiler produces 64-bit code. Add option '-b64' so that the 134 # linker groks 64-bit object files. 135 case "$acl_cv_path_LD " in 136 *" -b64 "*) ;; 137 *) acl_cv_path_LD="$acl_cv_path_LD -b64" ;; 138 esac 139 ], []) 140 ;; 141 sparc64-*-netbsd*) 142 AC_COMPILE_IFELSE( 143 [AC_LANG_SOURCE( 144 [[#if defined __sparcv9 || defined __arch64__ 145 int ok; 146 #else 147 error fail 148 #endif 149 ]])], 150 [], 151 [# The compiler produces 32-bit code. Add option '-m elf32_sparc' 152 # so that the linker groks 32-bit object files. 153 case "$acl_cv_path_LD " in 154 *" -m elf32_sparc "*) ;; 155 *) acl_cv_path_LD="$acl_cv_path_LD -m elf32_sparc" ;; 156 esac 157 ]) 158 ;; 159 esac 160 ]) 161 LD="$acl_cv_path_LD" 162 fi 163 if test -n "$LD"; then 164 AC_MSG_RESULT([$LD]) 165 else 166 AC_MSG_RESULT([no]) 167 AC_MSG_ERROR([no acceptable ld found in \$PATH]) 168 fi 169 AC_LIB_PROG_LD_GNU 170 ])