on)</code></dt>
<dd>
<p>Add <code>-v, --verbose</code>.</p>
</dd>
<dt class="hdlist1"><code>OPT_GROUP(description)</code></dt>
<dd>
<p>Start an option group. <code>description</code> is a short string that
describes the group or an empty string.
Start the description with an upper-case letter.</p>
</dd>
<dt class="hdlist1"><code>OPT_BOOL(short, long, &amp;int_var, description)</code></dt>
<dd>
<p>Introduce a boolean option. <code>int_var</code> is set to one with
<code>--option</code> and set to zero with <