lac : a7733e47d211e22c5ee220d04eadc61fce959655

     1: # lib-ld.m4 serial 6
     2: dnl Copyright (C) 1996-2003, 2009-2017 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: ])