Can you try the iulib build with the patch at
http://groups.google.com/group/ocropus/browse_thread/thread/59dad6688d46cb7c#
(direct link to the patch is:
http://groups.google.com/group/ocropus/attach/4dcf61e2547369e4/iulib-
buildfixes-2009-07-09.patch?part=2)
You'll still need to use the environment variable settings.
BTW: Does macosx support pkg-config? Can you reliably find packages with it?
Brad