1*75f6d617Schristos# Check for stdbool.h that conforms to C99. 2*75f6d617Schristos 3*75f6d617Schristos# Copyright (C) 2002 Free Software Foundation, Inc. 4*75f6d617Schristos 5*75f6d617Schristos# This program is free software; you can redistribute it and/or modify 6*75f6d617Schristos# it under the terms of the GNU General Public License as published by 7*75f6d617Schristos# the Free Software Foundation; either version 2, or (at your option) 8*75f6d617Schristos# any later version. 9*75f6d617Schristos 10*75f6d617Schristos# This program is distributed in the hope that it will be useful, 11*75f6d617Schristos# but WITHOUT ANY WARRANTY; without even the implied warranty of 12*75f6d617Schristos# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13*75f6d617Schristos# GNU General Public License for more details. 14*75f6d617Schristos 15*75f6d617Schristos# You should have received a copy of the GNU General Public License 16*75f6d617Schristos# along with this program; if not, write to the Free Software 17*75f6d617Schristos# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 18*75f6d617Schristos# 02111-1307, USA. 19*75f6d617Schristos 20*75f6d617SchristosAC_DEFUN([AC_HEADER_STDBOOL], 21*75f6d617Schristos [AC_CACHE_CHECK([for stdbool.h that conforms to C99], 22*75f6d617Schristos [ac_cv_header_stdbool_h], 23*75f6d617Schristos [AC_TRY_COMPILE( 24*75f6d617Schristos [ 25*75f6d617Schristos #include <stdbool.h> 26*75f6d617Schristos #ifndef bool 27*75f6d617Schristos "error: bool is not defined" 28*75f6d617Schristos #endif 29*75f6d617Schristos #ifndef false 30*75f6d617Schristos "error: false is not defined" 31*75f6d617Schristos #endif 32*75f6d617Schristos #ifndef true 33*75f6d617Schristos "error: false is not defined" 34*75f6d617Schristos #endif 35*75f6d617Schristos #ifndef __bool_true_false_are_defined 36*75f6d617Schristos "error: __bool_true_false_are_defined is not defined" 37*75f6d617Schristos #endif 38*75f6d617Schristos 39*75f6d617Schristos struct s { _Bool s: 1; _Bool t; } s; 40*75f6d617Schristos 41*75f6d617Schristos char a[true == 1 ? 1 : -1]; 42*75f6d617Schristos char b[false == 0 ? 1 : -1]; 43*75f6d617Schristos char c[__bool_true_false_are_defined == 1 ? 1 : -1]; 44*75f6d617Schristos char d[(bool) -0.5 == true ? 1 : -1]; 45*75f6d617Schristos char e[(bool) &s == true ? 1 : -1]; 46*75f6d617Schristos char f[(_Bool) -0.0 == false ? 1 : -1]; 47*75f6d617Schristos char g[true]; 48*75f6d617Schristos char h[sizeof (_Bool)]; 49*75f6d617Schristos char i[sizeof s.t]; 50*75f6d617Schristos ], 51*75f6d617Schristos [ return !a + !b + !c + !d + !e + !f + !g + !h + !i; ], 52*75f6d617Schristos [ac_cv_header_stdbool_h=yes], 53*75f6d617Schristos [ac_cv_header_stdbool_h=no])]) 54*75f6d617Schristos if test $ac_cv_header_stdbool_h = yes; then 55*75f6d617Schristos AC_DEFINE(HAVE_STDBOOL_H, 1, [Define to 1 if stdbool.h conforms to C99.]) 56*75f6d617Schristos fi]) 57