E every flag
in your list -- you can specify <A
HREF="#special"><code>--undefok</code></A> to suppress the error.</p>

<p>As in getopt(), <code>--</code> by itself will terminate flags
processing.  So in <code>foo -f1 1 -- -f2 2</code>, <code>f1</code> is
considered a flag, but <code>-f2</code> is not.</p>

<p>If a flag is specified more than once, only the last specification
is used; the others are ignored.</p>

<p>Note that flags do not have single-letter synonyms, like they do in
the getopt library, nor 