c99 bool support

#define M_PI        3.14159265358979323846264338327950288f   /* pi */

//#include "external/clang/lib/Headers/stdbool.h"

#define bool _Bool

#define true 1

#define false 0

#define __bool_true_false_are_defined 1

#include "stdbool.h"

typedef char int8_t;

typedef short int16_t;

typedef int int32_t;