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confuse 3.3

    1: # lib-ld.m4 serial 6
    2: dnl Copyright (C) 1996-2003, 2009-2013 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: ])