> clause must be added to the
class declaration:<br/><br/><center id='center28524'
><table cellspacing="0" class="color" cellpadding="0" width="95%"><tbody>
<tr><td bgcolor="#ffffcc"><pre class="prog" id='prog28522'
>(declare-library! 'foo <strong id='bold35452'
>:module-init</strong> 'foo <strong id='bold35454'
>:eval-init</strong> 'foo-eval)
</pre>
</td></tr>
</tbody></table></center>

Then, the module <code id='code28525'
>foo-eval</code> must be implemented in the 
<code id='code28526'
>libfoo_es</code>