along with this program. If not, see <http://www.gnu.org/licenses/>. */
-#ifdef HAVE_CONFIG_H
#include <config.h>
-#endif
#include <stdio.h>
#include <ctype.h>
int group_by = DEFAULT_GROUPING;
char *progname;
-void usage (void) NO_RETURN;
+_Noreturn void usage (void);
int
main (int argc, char **argv)