The MacOS X build doesn't work because that library is not supplied by
default. If you use otool to inspect the binaries you can see that they
are trying to link to a dynamic library located in /opt which is a
separate tree installed by macports which will often not be on user
machines. It would therefore make sense not to compile with that
support on the build machine or figure out a static link or include the
dynamic library.

While on the same topic the current mac binaries only run on 10.6 and
are all x86_64 - I think that the CMake config files for 10.4 and 10.5
were ignored at config time. Best,

Greg.