It appears iem16 is supposed to be built as a single binary. Unfortunately
Pd-extended broke these up into separate binaries without setting up a
sensible cross-platform shared library.

Thus Pd-extended had creation-order problems where, for example, the tab16
classes depended on a table16 to already exist so that the relevant symbols
could resolve properly.

We have no way of knowing how people were using these classes in the wild with
Pd-extended. To support old Pd-extended patches we just use copy/pasta for a
few functions so that any of the classes can get their objects instantiated
without depending on any of the other classes already existing.