dd>
<dt class="hdlist1"><code>OPT_COLOR_FLAG(short, long, &amp;int_var, description)</code></dt>
<dd>
<p>Introduce an option that takes an optional argument that can
have one of three values: "always", "never", or "auto".  If the
argument is not given, it defaults to "always".  The <code>--no-</code> form
works like <code>--long=never</code>; it cannot take an argument.  If
"always", set <code>int_var</code> to 1; if "never", set <code>int_var</code> to 0; if
"auto", set <code>int_var</code> to 1 if stdout 