Error: symbol _erealloc not found, PHP 4.0.6 under Solaris/Sparc

When trying to load Zend optimizer, the following error gets logged: Failed loading /var/www/lib/ZendOptimizer.so: ld.so.1: \ /opt/apache/bin/httpd: fatal: relocation error: file \ /var/www/lib/ZendOptimizer.so: symbol _erealloc: referenced \ symbol not found It seems from whatever little bits I could find on the Net, that the _erealloc symbol should be defined in the PHP itself. The PHP is installed as a module with Apache 1.3.22, compiled from sources, and is (otherwise) working perfectly fine. Any ideas on how to overcome this problem? Many thanks, -- Arcady Genkin Don't read everything you believe.