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      1 # lib-ld.m4 serial 3 (gettext-0.13)
      2 dnl Copyright (C) 1996-2003 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/AC_/AC_LIB/ and s/lt_cv/acl_cv/ to avoid collision
      9 dnl with libtool.m4.
     10 
     11 dnl From libtool-1.4. 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 ($LD) is GNU ld], acl_cv_prog_gnu_ld,
     14 [# I'd rather use --version here, but apparently some GNU ld's only accept -v.
     15 case `$LD -v 2>&1 </dev/null` in
     16 *GNU* | *'with BFD'*)
     17   acl_cv_prog_gnu_ld=yes ;;
     18 *)
     19   acl_cv_prog_gnu_ld=no ;;
     20 esac])
     21 with_gnu_ld=$acl_cv_prog_gnu_ld
     22 ])
     23 
     24 dnl From libtool-1.4. Sets the variable LD.
     25 AC_DEFUN([AC_LIB_PROG_LD],
     26 [AC_ARG_WITH(gnu-ld,
     27 [  --with-gnu-ld           assume the C compiler uses GNU ld [default=no]],
     28 test "$withval" = no || with_gnu_ld=yes, with_gnu_ld=no)
     29 AC_REQUIRE([AC_PROG_CC])dnl
     30 AC_REQUIRE([AC_CANONICAL_HOST])dnl
     31 # Prepare PATH_SEPARATOR.
     32 # The user is always right.
     33 if test "${PATH_SEPARATOR+set}" != set; then
     34   echo "#! /bin/sh" >conf$$.sh
     35   echo  "exit 0"   >>conf$$.sh
     36   chmod +x conf$$.sh
     37   if (PATH="/nonexistent;."; conf$$.sh) >/dev/null 2>&1; then
     38     PATH_SEPARATOR=';'
     39   else
     40     PATH_SEPARATOR=:
     41   fi
     42   rm -f conf$$.sh
     43 fi
     44 ac_prog=ld
     45 if test "$GCC" = yes; then
     46   # Check if gcc -print-prog-name=ld gives a path.
     47   AC_MSG_CHECKING([for ld used by GCC])
     48   case $host in
     49   *-*-mingw*)
     50     # gcc leaves a trailing carriage return which upsets mingw
     51     ac_prog=`($CC -print-prog-name=ld) 2>&5 | tr -d '\015'` ;;
     52   *)
     53     ac_prog=`($CC -print-prog-name=ld) 2>&5` ;;
     54   esac
     55   case $ac_prog in
     56     # Accept absolute paths.
     57     [[\\/]* | [A-Za-z]:[\\/]*)]
     58       [re_direlt='/[^/][^/]*/\.\./']
     59       # Canonicalize the path of ld
     60       ac_prog=`echo $ac_prog| sed 's%\\\\%/%g'`
     61       while echo $ac_prog | grep "$re_direlt" > /dev/null 2>&1; do
     62 	ac_prog=`echo $ac_prog| sed "s%$re_direlt%/%"`
     63       done
     64       test -z "$LD" && LD="$ac_prog"
     65       ;;
     66   "")
     67     # If it fails, then pretend we aren't using GCC.
     68     ac_prog=ld
     69     ;;
     70   *)
     71     # If it is relative, then search for the first ld in PATH.
     72     with_gnu_ld=unknown
     73     ;;
     74   esac
     75 elif test "$with_gnu_ld" = yes; then
     76   AC_MSG_CHECKING([for GNU ld])
     77 else
     78   AC_MSG_CHECKING([for non-GNU ld])
     79 fi
     80 AC_CACHE_VAL(acl_cv_path_LD,
     81 [if test -z "$LD"; then
     82   IFS="${IFS= 	}"; ac_save_ifs="$IFS"; IFS="${IFS}${PATH_SEPARATOR-:}"
     83   for ac_dir in $PATH; do
     84     test -z "$ac_dir" && ac_dir=.
     85     if test -f "$ac_dir/$ac_prog" || test -f "$ac_dir/$ac_prog$ac_exeext"; then
     86       acl_cv_path_LD="$ac_dir/$ac_prog"
     87       # Check to see if the program is GNU ld.  I'd rather use --version,
     88       # but apparently some GNU ld's only accept -v.
     89       # Break only if it was the GNU/non-GNU ld that we prefer.
     90       case `"$acl_cv_path_LD" -v 2>&1 < /dev/null` in
     91       *GNU* | *'with BFD'*)
     92 	test "$with_gnu_ld" != no && break ;;
     93       *)
     94 	test "$with_gnu_ld" != yes && break ;;
     95       esac
     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 ])
    111