OSX build fails due to python libraries not being included

[silicontrip]

libarea fails building area.so with the error:

Undefined symbols for architecture x86_64:
  "_PyBool_FromLong", referenced from:
      boost::python::objects::caller_py_function_impl<boost::python::detail::caller<bool (*)(), boost::python::default_call_policies, boost::mpl::vector1<bool> > >::operator()(_object*, _object*) in PythonStuff.o
...

This error occurs because cmake only includes the boost-python library and none of the python libraries that the boost-python library depends on.

I don't know enough about cmake to resolve this myself (yet)