if (! (opt->arg || real->arg))
if (!(opt->arg || real->arg) && !((opt->flags | real->flags) & OPTION_NO_USAGE))
add_argless_short_opt (const struct argp_option *opt,		       const struct argp_option *real,		       void *cookie){  char **snao_end = cookie;  if (! (opt->arg || real->arg))    *(*snao_end)++ = opt->key;  return 0;}