-#if HAVE_STDBOOL_H
-# include <stdbool.h>
-#else
-# ifndef HAVE__BOOL
-# ifdef __cplusplus
-typedef bool _Bool;
-# else
-# define _Bool signed char
-# endif
-# endif
-# define bool _Bool
-# define false 0
-# define true 1
-# define __bool_true_false_are_defined 1
-#endif