1# Check for stdbool.h that conforms to C99. 2 3# Copyright (C) 2002-2003 Free Software Foundation, Inc. 4 5# This program is free software; you can redistribute it and/or modify 6# it under the terms of the GNU General Public License as published by 7# the Free Software Foundation; either version 2, or (at your option) 8# any later version. 9 10# This program is distributed in the hope that it will be useful, 11# but WITHOUT ANY WARRANTY; without even the implied warranty of 12# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13# GNU General Public License for more details. 14 15# You should have received a copy of the GNU General Public License 16# along with this program; if not, write to the Free Software 17# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 18# USA. 19 20# Prepare for substituting <stdbool.h> if it is not supported. 21 22AC_DEFUN([AM_STDBOOL_H], 23[ 24 AC_REQUIRE([AC_HEADER_STDBOOL]) 25 26 # Define two additional variables used in the Makefile substitution. 27 28 if test "$ac_cv_header_stdbool_h" = yes; then 29 STDBOOL_H='' 30 else 31 STDBOOL_H='stdbool.h' 32 fi 33 AC_SUBST([STDBOOL_H]) 34 35 if test "$ac_cv_type__Bool" = yes; then 36 HAVE__BOOL=1 37 else 38 HAVE__BOOL=0 39 fi 40 AC_SUBST([HAVE__BOOL]) 41]) 42