#include <setjmp.h>

#define T(t) (t*)0;

static void f()

{

T(jmp_buf)

{void(*p)(jmp_buf,int) = longjmp;}

#ifdef setjmp

{int x = setjmp((jmp_buf){0});}

#else

{int(*p)(jmp_buf) = setjmp;}

#endif

#ifdef _POSIX_C_SOURCE

T(sigjmp_buf)

{void(*p)(sigjmp_buf,int) = siglongjmp;}

#ifdef sigsetjmp

{int x = sigsetjmp((sigjmp_buf){0}, 0);}

#else

{int(*p)(sigjmp_buf,int) = sigsetjmp;}

#endif

#endif

#if defined _XOPEN_SOURCE && defined OBSOLETE

{void(*p)(jmp_buf,int) = _longjmp;}

#ifdef _setjmp

{int x = _setjmp((jmp_buf){0});}

#else

{int(*p)(jmp_buf) = _setjmp;}

#endif

#endif

}