};
/* display usage message and terminate */
-static void help(void) {
+static void attribute((noreturn)) help(void) {
xprintf("Usage:\n"
" disorder-udplog [OPTIONS] ADDRESS PORT\n"
"Options:\n"
}
/* display version number and terminate */
-static void version(void) {
+static void attribute((noreturn)) version(void) {
xprintf("%s", disorder_version_string);
xfclose(stdout);
exit(0);