undefined symbol: _estrndup

Ajuntament
10 de Abril del 2008
Hola, he instalado php 5.25 con:

./configure --with-ibm-db2=/home/db2inst1/sqllib --with-apxs2=/usr/sbin/apxs --without-sqlite --with-mysql --with-zlib --with-gd --with-ttf --with-png-dir --with-jpeg-dir -with-gettext --with-ldap --with-imap-ssl

Ahora me encuentro que al arrancar apache me devuelve este error:

Iniciando httpd: httpd: Syntax error on line 211 of /etc/httpd/conf/httpd.conf: Syntax error on line 6 of /etc/httpd/conf.d/php.conf: Cannot load /etc/httpd/modules/libphp5.so into server: /etc/httpd/modules/libphp5.so: undefined symbol: _estrndup

la librería está, he buscado información pero no encuentro o no he sabido interpretarla.
Alguna idea?

SO: Centos 5.1
PHP 5.2.5
Apache 2.2.3