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-# ===========================================================================
-# http://www.gnu.org/software/autoconf-archive/ax_check_define.html
-# ===========================================================================
-#
-# SYNOPSIS
-#
-# AC_CHECK_DEFINE([symbol], [ACTION-IF-FOUND], [ACTION-IF-NOT])
-# AX_CHECK_DEFINE([includes],[symbol], [ACTION-IF-FOUND], [ACTION-IF-NOT])
-#
-# DESCRIPTION
-#
-# Complements AC_CHECK_FUNC but it does not check for a function but for a
-# define to exist. Consider a usage like:
-#
-# AC_CHECK_DEFINE(__STRICT_ANSI__, CFLAGS="$CFLAGS -D_XOPEN_SOURCE=500")
-#
-# LICENSE
-#
-# Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
-#
-# This program is free software; you can redistribute it and/or modify it
-# under the terms of the GNU General Public License as published by the
-# Free Software Foundation; either version 3 of the License, or (at your
-# option) any later version.
-#
-# This program is distributed in the hope that it will be useful, but
-# WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
-# Public License for more details.
-#
-# You should have received a copy of the GNU General Public License along
-# with this program. If not, see <http://www.gnu.org/licenses/>.
-#
-# As a special exception, the respective Autoconf Macro's copyright owner
-# gives unlimited permission to copy, distribute and modify the configure
-# scripts that are the output of Autoconf when processing the Macro. You
-# need not follow the terms of the GNU General Public License when using
-# or distributing such scripts, even though portions of the text of the
-# Macro appear in them. The GNU General Public License (GPL) does govern
-# all other use of the material that constitutes the Autoconf Macro.
-#
-# This special exception to the GPL applies to versions of the Autoconf
-# Macro released by the Autoconf Archive. When you make and distribute a
-# modified version of the Autoconf Macro, you may extend this special
-# exception to the GPL to apply to your modified version as well.
-
-#serial 8
-
-AU_ALIAS([AC_CHECK_DEFINED], [AC_CHECK_DEFINE])
-AC_DEFUN([AC_CHECK_DEFINE],[
-AS_VAR_PUSHDEF([ac_var],[ac_cv_defined_$1])dnl
-AC_CACHE_CHECK([for $1 defined], ac_var,
-AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[
- #ifdef $1
- int ok;
- #else
- choke me
- #endif
-]])],[AS_VAR_SET(ac_var, yes)],[AS_VAR_SET(ac_var, no)]))
-AS_IF([test AS_VAR_GET(ac_var) != "no"], [$2], [$3])dnl
-AS_VAR_POPDEF([ac_var])dnl
-])
-
-AU_ALIAS([AX_CHECK_DEFINED], [AX_CHECK_DEFINE])
-AC_DEFUN([AX_CHECK_DEFINE],[
-AS_VAR_PUSHDEF([ac_var],[ac_cv_defined_$2_$1])dnl
-AC_CACHE_CHECK([for $2 defined in $1], ac_var,
-AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <$1>]], [[
- #ifdef $2
- int ok;
- #else
- choke me
- #endif
-]])],[AS_VAR_SET(ac_var, yes)],[AS_VAR_SET(ac_var, no)]))
-AS_IF([test AS_VAR_GET(ac_var) != "no"], [$3], [$4])dnl
-AS_VAR_POPDEF([ac_var])dnl
-])
-
-AC_DEFUN([AX_CHECK_FUNC],
-[AS_VAR_PUSHDEF([ac_var], [ac_cv_func_$2])dnl
-AC_CACHE_CHECK([for $2], ac_var,
-dnl AC_LANG_FUNC_LINK_TRY
-[AC_LINK_IFELSE([AC_LANG_PROGRAM([$1
- #undef $2
- char $2 ();],[
- char (*f) () = $2;
- return f != $2; ])],
- [AS_VAR_SET(ac_var, yes)],
- [AS_VAR_SET(ac_var, no)])])
-AS_IF([test AS_VAR_GET(ac_var) = yes], [$3], [$4])dnl
-AS_VAR_POPDEF([ac_var])dnl
-])# AC_CHECK_FUNC