[Dovecot] Building Dovecot to link against alternative libldap

I'm running Dovecot on an Ubuntu (Edgy) box. I'd like to link dovecot against the latest stable version of the OpenLDAP libraries instead of the system defaults. I can't really replace the existing libraries as other packages rely on them.

If this didn't use libtool, I would be able to influence the runtime linker by manipulating -rpath and -L. I can't seem to figure out how to get this to work with Dovecot's libtool-based build.

The system libldap_r.so.2 lives in /usr/lib My libldap_r.so.2.3 lives in /usr/local/lib

Anyone have any pointers?

-Ben