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-# ===========================================================================
-# http://www.gnu.org/software/autoconf-archive/ax_check_typedef.html
-# ===========================================================================
-#
-# SYNOPSIS
-#
-# AX_CHECK_TYPEDEF(TYPEDEF, HEADER [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND ]])
-#
-# DESCRIPTION
-#
-# Check if the given typedef-name is recognized as a type. The trick is to
-# use a sizeof(TYPEDEF) and see if the compiler is happy with that.
-#
-# This can be thought of as a mixture of AC_CHECK_TYPE(TYPEDEF,DEFAULT)
-# and AC_CHECK_LIB(LIBRARY,FUNCTION,ACTION-IF-FOUND,ACTION-IF-NOT-FOUND).
-#
-# A convenience macro AX_CHECK_TYPEDEF_ is provided that will not emit any
-# message to the user - it just executes one of the actions.
-#
-# 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 5
-
-AU_ALIAS([AC_CHECK_TYPEDEF], [AX_CHECK_TYPEDEF])
-AC_DEFUN([AX_CHECK_TYPEDEF_],
-[dnl
-ac_lib_var=`echo $1['_']$2 | sed 'y%./+-%__p_%'`
-AC_CACHE_VAL(ac_cv_lib_$ac_lib_var,
-[ eval "ac_cv_type_$ac_lib_var='not-found'"
- ac_cv_check_typedef_header=`echo ifelse([$2], , stddef.h, $2)`
- AC_TRY_COMPILE( [#include <$ac_cv_check_typedef_header>],
- [int x = sizeof($1); x = x;],
- eval "ac_cv_type_$ac_lib_var=yes" ,
- eval "ac_cv_type_$ac_lib_var=no" )
- if test `eval echo '$ac_cv_type_'$ac_lib_var` = "no" ; then
- ifelse([$4], , :, $4)
- else
- ifelse([$3], , :, $3)
- fi
-])])
-
-dnl AX_CHECK_TYPEDEF(TYPEDEF, HEADER [, ACTION-IF-FOUND,
-dnl [, ACTION-IF-NOT-FOUND ]])
-AC_DEFUN([AX_CHECK_TYPEDEF],
-[dnl
- AC_MSG_CHECKING([for $1 in $2])
- AX_CHECK_TYPEDEF_($1,$2,AC_MSG_RESULT(yes),AC_MSG_RESULT(no))dnl
-])