Dogcows Code - chaz/openbox/blob - m4/lib-ld.m4

   1 # lib-ld.m4 serial 1 (gettext-0.11)
   2 dnl Copyright (C) 1996-2002 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 "$withval" = no || with_gnu_ld=yes, with_gnu_ld=no)
  30 AC_REQUIRE([AC_PROG_CC])dnl
  31 AC_REQUIRE([AC_CANONICAL_HOST])dnl
  32 ac_prog=ld
  33 if test "$GCC" = yes; then
  34   # Check if gcc -print-prog-name=ld gives a path.
  35   AC_MSG_CHECKING([for ld used by GCC])
  36   case $host in
  37   *-*-mingw*)
  38     # gcc leaves a trailing carriage return which upsets mingw
  39     ac_prog=`($CC -print-prog-name=ld) 2>&5 | tr -d '\015'` ;;
  40   *)
  41     ac_prog=`($CC -print-prog-name=ld) 2>&5` ;;
  42   esac
  43   case $ac_prog in
  44     # Accept absolute paths.
  45     [[\\/]* | [A-Za-z]:[\\/]*)]
  46       [re_direlt='/[^/][^/]*/\.\./']
  47       # Canonicalize the path of ld
  48       ac_prog=`echo $ac_prog| sed 's%\\\\%/%g'`
  49       while echo $ac_prog | grep "$re_direlt" > /dev/null 2>&1; do
  50         ac_prog=`echo $ac_prog| sed "s%$re_direlt%/%"`
  51       done
  52       test -z "$LD" && LD="$ac_prog"
  53       ;;
  54   "")
  55     # If it fails, then pretend we aren't using GCC.
  56     ac_prog=ld
  57     ;;
  58   *)
  59     # If it is relative, then search for the first ld in PATH.
  60     with_gnu_ld=unknown
  61     ;;
  62   esac
  63 elif test "$with_gnu_ld" = yes; then
  64   AC_MSG_CHECKING([for GNU ld])
  65 else
  66   AC_MSG_CHECKING([for non-GNU ld])
  67 fi
  68 AC_CACHE_VAL(acl_cv_path_LD,
  69 [if test -z "$LD"; then
  70   IFS="${IFS=   }"; ac_save_ifs="$IFS"; IFS="${IFS}${PATH_SEPARATOR-:}"
  71   for ac_dir in $PATH; do
  72     test -z "$ac_dir" && ac_dir=.
  73     if test -f "$ac_dir/$ac_prog" || test -f "$ac_dir/$ac_prog$ac_exeext"; then
  74       acl_cv_path_LD="$ac_dir/$ac_prog"
  75       # Check to see if the program is GNU ld.  I'd rather use --version,
  76       # but apparently some GNU ld's only accept -v.
  77       # Break only if it was the GNU/non-GNU ld that we prefer.
  78       if "$acl_cv_path_LD" -v 2>&1 < /dev/null | egrep '(GNU|with BFD)' > /dev/null; then
  79         test "$with_gnu_ld" != no && break
  80       else
  81         test "$with_gnu_ld" != yes && break
  82       fi
  83     fi
  84   done
  85   IFS="$ac_save_ifs"
  86 else
  87   acl_cv_path_LD="$LD" # Let the user override the test with a path.
  88 fi])
  89 LD="$acl_cv_path_LD"
  90 if test -n "$LD"; then
  91   AC_MSG_RESULT($LD)
  92 else
  93   AC_MSG_RESULT(no)
  94 fi
  95 test -z "$LD" && AC_MSG_ERROR([no acceptable ld found in \$PATH])
  96 AC_LIB_PROG_LD_GNU
  97 ])