code>--no-option</code>.</p>
</dd>
<dt class="hdlist1"><code>OPT_COUNTUP(short, long, &amp;int_var, description)</code></dt>
<dd>
<p>Introduce a count-up option.
Each use of <code>--option</code> increments <code>int_var</code>, starting from zero
(even if initially negative), and <code>--no-option</code> resets it to
zero. To determine if <code>--option</code> or <code>--no-option</code> was encountered at
all, initialize <code>int_var</code> to a negative value, and if it is still
negative after parse_opt