config/lib-ld.m4

   1 # lib-ld.m4 serial 2 (gettext-0.12)
   2 dnl Copyright (C) 1996-2003 Free Software Foundation, Inc.
   3 dnl This file is free software, distributed under the terms of the GNU
   4 dnl General Public License.  As a special exception to the GNU General
   5 dnl Public License, this file may be distributed as part of a program
   6 dnl that contains a configuration script generated by Autoconf, under
   7 dnl the same distribution terms as the rest of that program.
   8
   9 dnl Subroutines of libtool.m4,
  10 dnl with replacements s/AC_/AC_LIB/ and s/lt_cv/acl_cv/ to avoid collision
  11 dnl with libtool.m4.
  12
  13 dnl From libtool-1.4. 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 ld's only accept -v.
  17 if $LD -v 2>&1 </dev/null | egrep '(GNU|with BFD)' 1>&5; then
  18   acl_cv_prog_gnu_ld=yes
  19 else
  20   acl_cv_prog_gnu_ld=no
  21 fi])
  22 with_gnu_ld=$acl_cv_prog_gnu_ld
  23 ])
  24
  25 dnl From libtool-1.4. Sets the variable LD.
  26 AC_DEFUN([AC_LIB_PROG_LD],
  27 [AC_ARG_WITH(gnu-ld,
  28 [  --with-gnu-ld           assume the C compiler uses GNU ld [default=no]],
  29 test "$withval" = no || with_gnu_ld=yes, with_gnu_ld=no)
  30 AC_REQUIRE([AC_PROG_CC])dnl
  31 AC_REQUIRE([AC_CANONICAL_HOST])dnl
  32 # Prepare PATH_SEPARATOR.
  33 # The user is always right.
  34 if test "${PATH_SEPARATOR+set}" != set; then
  35   echo "#! /bin/sh" >conf$$.sh
  36   echo  "exit 0"   >>conf$$.sh
  37   chmod +x conf$$.sh
  38   if (PATH="/nonexistent;."; conf$$.sh) >/dev/null 2>&1; then
  39     PATH_SEPARATOR=';'
  40   else
  41     PATH_SEPARATOR=:
  42   fi
  43   rm -f conf$$.sh
  44 fi
  45 ac_prog=ld
  46 if test "$GCC" = yes; then
  47   # Check if gcc -print-prog-name=ld gives a path.
  48   AC_MSG_CHECKING([for ld used by GCC])
  49   case $host in
  50   *-*-mingw*)
  51     # gcc leaves a trailing carriage return which upsets mingw
  52     ac_prog=`($CC -print-prog-name=ld) 2>&5 | tr -d '\015'` ;;
  53   *)
  54     ac_prog=`($CC -print-prog-name=ld) 2>&5` ;;
  55   esac
  56   case $ac_prog in
  57     # Accept absolute paths.
  58     [[\\/]* | [A-Za-z]:[\\/]*)]
  59       [re_direlt='/[^/][^/]*/\.\./']
  60       # Canonicalize the path of ld
  61       ac_prog=`echo $ac_prog| sed 's%\\\\%/%g'`
  62       while echo $ac_prog | grep "$re_direlt" > /dev/null 2>&1; do
  63         ac_prog=`echo $ac_prog| sed "s%$re_direlt%/%"`
  64       done
  65       test -z "$LD" && LD="$ac_prog"
  66       ;;
  67   "")
  68     # If it fails, then pretend we aren't using GCC.
  69     ac_prog=ld
  70     ;;
  71   *)
  72     # If it is relative, then search for the first ld in PATH.
  73     with_gnu_ld=unknown
  74     ;;
  75   esac
  76 elif test "$with_gnu_ld" = yes; then
  77   AC_MSG_CHECKING([for GNU ld])
  78 else
  79   AC_MSG_CHECKING([for non-GNU ld])
  80 fi
  81 AC_CACHE_VAL(acl_cv_path_LD,
  82 [if test -z "$LD"; then
  83   IFS="${IFS=   }"; ac_save_ifs="$IFS"; IFS="${IFS}${PATH_SEPARATOR-:}"
  84   for ac_dir in $PATH; do
  85     test -z "$ac_dir" && ac_dir=.
  86     if test -f "$ac_dir/$ac_prog" || test -f "$ac_dir/$ac_prog$ac_exeext"; then
  87       acl_cv_path_LD="$ac_dir/$ac_prog"
  88       # Check to see if the program is GNU ld.  I'd rather use --version,
  89       # but apparently some GNU ld's only accept -v.
  90       # Break only if it was the GNU/non-GNU ld that we prefer.
  91       if "$acl_cv_path_LD" -v 2>&1 < /dev/null | egrep '(GNU|with BFD)' > /dev/null; then
  92         test "$with_gnu_ld" != no && break
  93       else
  94         test "$with_gnu_ld" != yes && break
  95       fi
  96     fi
  97   done
  98   IFS="$ac_save_ifs"
  99 else
 100   acl_cv_path_LD="$LD" # Let the user override the test with a path.
 101 fi])
 102 LD="$acl_cv_path_LD"
 103 if test -n "$LD"; then
 104   AC_MSG_RESULT($LD)
 105 else
 106   AC_MSG_RESULT(no)
 107 fi
 108 test -z "$LD" && AC_MSG_ERROR([no acceptable ld found in \$PATH])
 109 AC_LIB_PROG_LD_GNU
 110 ])