PHP Compiling Oddness

I've just been compiling Easy Mac Apache MySQL and PHP and when compiling the php for the system package came across a very very odd error, when running php on a mac without xcode and not compiling with bz2 it would bring up an error unable to find libltdl.3.dylib which is a libtool dynamic library, now what's really odd is when I compile --with-bz2 the problem goes away, why I have no idea!