Hey, I just installed PHP-5.2.5-r1 on my local Gentoo box and noticed this message. It reminded me of this thread.
* With PHP 5.2, some extensions were removed from PHP because * they were unmaintained or moved to PECL. Our ebuilds reflect * this: the Filepro and HwAPI (Hyperwave-API) extensions were * removed altogether and have no available substitute. * The Informix extension was also removed, as well as the optional * memory-limit setting: memory-limit is now always enforced!