dnl  Copyright (C) 2003  OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
dnl  CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS 
dnl 
dnl  This library is free software; you can redistribute it and/or 
dnl  modify it under the terms of the GNU Lesser General Public 
dnl  License as published by the Free Software Foundation; either 
dnl  version 2.1 of the License. 
dnl 
dnl  This library is distributed in the hope that it will be useful, 
dnl  but WITHOUT ANY WARRANTY; without even the implied warranty of 
dnl  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU 
dnl  Lesser General Public License for more details. 
dnl 
dnl  You should have received a copy of the GNU Lesser General Public 
dnl  License along with this library; if not, write to the Free Software 
dnl  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA 
dnl 
dnl  See http://www.opencascade.org/SALOME/ or email : webmaster.salome@opencascade.org 
dnl
dnl
dnl
dnl @synopsis AC_CXX_BOOL
dnl
dnl If the compiler recognizes bool as a separate built-in type,
dnl define HAVE_BOOL. Note that a typedef is not a separate
dnl type since you cannot overload a function such that it accepts either
dnl the basic type or the typedef.
dnl
dnl @version $Id$
dnl @author Luc Maisonobe
dnl
AC_DEFUN(AC_CXX_BOOL,
[AC_CACHE_CHECK(whether the compiler recognizes bool as a built-in type,
ac_cv_cxx_bool,
[AC_LANG_SAVE
 AC_LANG_CPLUSPLUS
 AC_TRY_COMPILE([
int f(int  x){return 1;}
int f(char x){return 1;}
int f(bool x){return 1;}
],[bool b = true; return f(b);],
 ac_cv_cxx_bool=yes, ac_cv_cxx_bool=no)
 AC_LANG_RESTORE
])
if test "$ac_cv_cxx_bool" = yes; then
  AC_DEFINE(HAVE_BOOL,,[define if bool is a built-in type])
fi
])