problem with postgres integration

Hi all i'm having a strange problem while compiling php 4.2.3 i compiled php with these options Configure Command './configure' '--with-mysql=/usr/local/mysql/' '--with-apxs=/usr/local/apache/bin/apxs' '--with-openssl=/usr/local/ssl/' '--with-pear' '--with-gd' '--with-pqsql=/usr/local/pgsql/' '--with-png' '--with-jpeg-dir=/usr/' '--with-ttf' but i see no pgsql configuration Also i see no libpng congiguration in gd table i see only jpeg configuration.I was trying to use jpgraph so i did all this there were no errors while compiling the code.so plz help me am i missing something thanks in advance suman