Configured php with

./configure '--enable-bcmath' '--enable-calendar' '--enable-dbase' '--enable-filepro' '--enable-ftp' '--with-imap=/usr/local/' '--with-mcrypt=/usr/local/' '--with-mysql=/usr/local/' '--with-mm=/usr/local/' '--enable-inline-optimization' '--enable-memory-limit' '--enable-dba=shared' '--with-gdbm' '--with-snmp=/usr/local/' '--enable-ucd-snmp-hack' '--disable-debug' '--enable-sysvsem' '--enable-sysvshm' '--with-zlib' '--enable-versioning' '--with-ldap=/usr/local/' '--with-gettext' '--with-mhash' --with-apxs2=/usr/local/apache2/bin/apxs 

Configured apache 2 with

./configure --with-mpm=prefork --enable-cache --enable-disk-cache --enable-vhost-alias --enable-status --enable-speling --enable-suexec --enable-so --enable-shared=max --prefix=/usr/local/apache2

Getting the following error when trying to start apache 2

root@server /usr/local/apache2/bin > ./httpd 
Syntax error on line 185 of /usr/local/apache2/conf/httpd.conf:
Cannot load /usr/local/apache2/libexec/libphp4.so into server: /usr/local/apache2/libexec/libphp4.so: Undefined symbol "__pure_virtual"

I have Apache 1.3.12 on this server also compiled in the same way from the same cvs and it is working perfectly.