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