CMake and linking errors?

OK, I must admit that I haven’t had a chance to try out the new code,
although it definitely sounds good from the messages to the list.

I compile on Mac OS X, so sometimes libraries (particularly
development versions) are installed into strange locations. I’m
having trouble getting CMake to find them. For example, right now,
the code compiles, but linking fails:

ld: Undefined symbols:

Any suggestions for what to look for?