For some strange reason Mk4py disappears when libmk4py.so is linked
using ld -G as per the standard script (I also had to add libgcc
manually to the Makefile to get it to load without relocation errors in
the first place).
If I build Mk4py.so manually using gcc -shared instead of ld -G, it works.
Apparently, Py_InitModule4 is getting an empty Mk4Methods argument and
is not initializing the module correctly. I have attached a shell
session transcript illustrating the problem.

The MIME type was confused, here it is again, hopefully more easily
readable.