Hallo!
Well, the error is not OSX-specific, it's just a stanadard ld error when it can't find symbols:
Okay, I understand - the problem is that linking on osx works different than on linux, because on linux it works ...
That's because it's trying to build iem_t3_lib.c, which is the lib glue file and not an external, and it's not linking in the .o files for each class. This change was made here (first one):
Thanks - I fixed it !
LG Georg