problems configuring php and postgres - "call to undefined function"

I am trying to get postgresql (pg) support for php working on my RH7 box. I had a working binary installation of postgres 7.03. I thought I had read that php4 had default support for pg, but my call to pg_connect() gave me a "Call to undefined function" error. So, next I tried to re ./configure and add --with-pgsql=/usr/local/pgsql. That would not compile, bombing when it looked for "postgres.h". I did not have the pg source (since this was a binary installation) so I installed that next (in /usr/src, if that matters) I deleted my existing binary installation of pg, and ran ./configure; gmake; gmake install with no errors, and I added an entry in /etc/ld.so.conf as stated in the pg INSTALL. Pg is running fine with several db and I can remotely connect, so I think thats ok. After finishing with the source installation of pg, I re- ./configure php, make and get the same error looking for "postgres.h" <kludge> I then manually edited the ./configure file and added the include path to /usr/src/postgres/install</kludge> After this, I could successfully make php, then make install. I restarted apache, but I am still getting "Call to undefined function". Any thoughts? I'm pretty much out of ideas right now......... Regards, Gary Huntress