gcc/libgomp/testsuite/libgomp.c/static-chunk-size-one.c

extern void abort ();

int
bar ()
{
  int a = 0, i;

#pragma omp parallel for num_threads (3) reduction (+:a) schedule(static, 1)
  for (i = 0; i < 10; i++)
    a += i;

  return a;
}

int
main (void)
{
  int res;
  res = bar ();
  if (res != 45)
    abort ();
  return 0;
}