need php_pgsql.so that works with mac os x

[BugX]

Hi all..
I've succesfully installed MAMPP on my mac os, and I'm trying to enable postgre extension.
What I did is just edit the php.ini and uncomment this line:
extension=php_pgsql.so
But seems that php_pgsql.so is not exists.
By the way, I'm using XAMPP installer. Is my installer corrupt? or php_pgsql.so is not included in this bundle?
Can anybody upload php_pgsql.so for mac os, so that I can add this file manually to its extension folder?

thx..
Andre