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#include <stdio.h>

#include <stdlib.h>

#include <stdarg.h>

volatile int should_optimize;

int

__attribute__((noinline))

__printf_chk (int flag, const char *fmt, ...)

{

  va_list ap;

  int ret;

#ifdef __OPTIMIZE__

  if (should_optimize)

    abort ();

#endif

  should_optimize = 1;

  va_start (ap, fmt);

  ret = vprintf (fmt, ap);

  va_end (ap);

  return ret;

}

int

main (void)

{

#define test(ret, opt, args...) \

  should_optimize = opt;                \

  __printf_chk (1, args);               \

  if (!should_optimize)                 \

    abort ();                           \

  should_optimize = 0;                   \

  if (__printf_chk (1, args) != ret)    \

    abort ();                           \

  if (!should_optimize)                 \

    abort ();

  test (5, 0, "hello");

  test (6, 1, "hello\n");

  test (1, 1, "a");

  test (0, 1, "");

  test (5, 0, "%s", "hello");

  test (6, 1, "%s", "hello\n");

  test (1, 1, "%s", "a");

  test (0, 1, "%s", "");

  test (1, 1, "%c", 'x');

  test (7, 1, "%s\n", "hello\n");

  test (2, 0, "%d\n", 0);

  return 0;

}