Building libpq independently of server

Hi,
Is there a way to build libpq on OSX without buillding the whole server?
I will connect to external server and don't want to build everything
just to get a client library.

If I can't - is there a reason?
I mean it is a client-server DBMS and it should be possible to build
one without the other.

There was a package called libpq that can be installed independently
on *nix, but for some reason it is no longer available.

Can anyone help?

Thank you.