Function complain_about_duplicate

src/options.c:6789–6809

}

staticfn void
complain_about_duplicate(int optidx)
{
    char buf[BUFSZ];

#ifdef MACOS9
    /* the Mac has trouble dealing with the output of messages while
     * processing the config file.  That should get fixed one day.
     * For now just return.
     */
#else /* !MACOS9 */
    buf[0] = '\0';
    if (using_alias)
        Sprintf(buf, " (via alias: %s)", allopt[optidx].alias);
    config_error_add("%s option specified multiple times: %s%s",
                     (allopt[optidx].opttyp == CompOpt) ? "compound"
                                                        : "boolean",
                     allopt[optidx].name, buf);
#endif /* ?MACOS9 */
    return;
}

staticfn void
rejectoption(const char *optname)