freebsd/usr.bin/diff/tests/ifdef.out

/*
 * A comment 
 *
#ifndef PLOP
 * And another  bla
#else /* PLOP */
 * And another bla
#endif /* PLOP */
 *
#ifndef PLOP
 * And yet another
#else /* PLOP */
 * and yet another
#endif /* PLOP */
 */

int
main(void)
{
#ifdef PLOP

#endif /* PLOP */
	printf("something");

	return (0);
}