#ifndef __clock_t_defined#define __clock_t_defined 1#include <bits/types.h>
__BEGIN_NAMESPACE_STD
/* Returned by `clock'. */typedef __clock_t clock_t;
__END_NAMESPACE_STD
#if defined __USE_XOPEN || defined __USE_POSIX__USING_NAMESPACE_STD(clock_t)#endif#endif