unrealircd

- supernets unrealircd source & configuration
git clone git://git.acid.vegas/unrealircd.git
ax_check_link_flag.m4 (3056B)
      1 # ===========================================================================
      2 #    http://www.gnu.org/software/autoconf-archive/ax_check_link_flag.html
      3 # ===========================================================================
      4 #
      5 # SYNOPSIS
      6 #
      7 #   AX_CHECK_LINK_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS])
      8 #
      9 # DESCRIPTION
     10 #
     11 #   Check whether the given FLAG works with the linker or gives an error.
     12 #   (Warnings, however, are ignored)
     13 #
     14 #   ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on
     15 #   success/failure.
     16 #
     17 #   If EXTRA-FLAGS is defined, it is added to the linker's default flags
     18 #   when the check is done.  The check is thus made with the flags: "LDFLAGS
     19 #   EXTRA-FLAGS FLAG".  This can for example be used to force the linker to
     20 #   issue an error when a bad flag is given.
     21 #
     22 #   NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this
     23 #   macro in sync with AX_CHECK_{PREPROC,COMPILE}_FLAG.
     24 #
     25 # LICENSE
     26 #
     27 #   Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
     28 #   Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com>
     29 #
     30 #   This program is free software: you can redistribute it and/or modify it
     31 #   under the terms of the GNU General Public License as published by the
     32 #   Free Software Foundation, either version 3 of the License, or (at your
     33 #   option) any later version.
     34 #
     35 #   This program is distributed in the hope that it will be useful, but
     36 #   WITHOUT ANY WARRANTY; without even the implied warranty of
     37 #   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
     38 #   Public License for more details.
     39 #
     40 #   You should have received a copy of the GNU General Public License along
     41 #   with this program. If not, see <http://www.gnu.org/licenses/>.
     42 #
     43 #   As a special exception, the respective Autoconf Macro's copyright owner
     44 #   gives unlimited permission to copy, distribute and modify the configure
     45 #   scripts that are the output of Autoconf when processing the Macro. You
     46 #   need not follow the terms of the GNU General Public License when using
     47 #   or distributing such scripts, even though portions of the text of the
     48 #   Macro appear in them. The GNU General Public License (GPL) does govern
     49 #   all other use of the material that constitutes the Autoconf Macro.
     50 #
     51 #   This special exception to the GPL applies to versions of the Autoconf
     52 #   Macro released by the Autoconf Archive. When you make and distribute a
     53 #   modified version of the Autoconf Macro, you may extend this special
     54 #   exception to the GPL to apply to your modified version as well.
     55 
     56 #serial 2
     57 
     58 AC_DEFUN([AX_CHECK_LINK_FLAG],
     59 [AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_ldflags_$4_$1])dnl
     60 AC_CACHE_CHECK([whether the linker accepts $1], CACHEVAR, [
     61   ax_check_save_flags=$LDFLAGS
     62   LDFLAGS="$LDFLAGS $4 $1"
     63   AC_LINK_IFELSE([AC_LANG_PROGRAM()],
     64     [AS_VAR_SET(CACHEVAR,[yes])],
     65     [AS_VAR_SET(CACHEVAR,[no])])
     66   LDFLAGS=$ax_check_save_flags])
     67 AS_IF([test x"AS_VAR_GET(CACHEVAR)" = xyes],
     68   [m4_default([$2], :)],
     69   [m4_default([$3], :)])
     70 AS_VAR_POPDEF([CACHEVAR])dnl
     71 ])dnl AX_CHECK_LINK_FLAGS