Problems compiling for pgsql support

I have been trying to get php version 4.3.3 to work with postgresql for days
now. I have postgresql installed and running on the server. We are using
the WHM/Cpanel management suite so we are using apache 1.3.29 aswell.

I have php currently configured as reported by phpinfo()

'./configure' '--with-apxs=/usr/local/apache/bin/apxs' '--with-xml'
'--enable-bcmath' '--enable-calendar' '--enable-ftp' '--with-gd'
'--with-jpeg-dir=/usr/local' '--with-png-dir=/usr'
'--with-xpm-dir=/usr/X11R6' '--with-gettext' '--enable-magic-quotes'
'--with-mysql' '--with-pear' '--enable-sockets' '--enable-track-vars'
'--with-ttf' '--with-freetype-dir=/usr' '--enable-gd-native-ttf'
'--enable-versioning' '--with-zlib'

When I try to reconfigure php with the '--with-pgsql-dir=/usr' flag php
appears to compile and configure properly yet the builddate in phpinfo();
never changes.

In looking thru the php.net website it seems like there have been a lot of
issues with getting pgsql and php working properly. I have exhaused my
ideas on what could be the cause and hope maybe someone out there might have
a few tricks I can try.

Thanks in advance.

Aaron