I created some
Cython_Mod1.obj : warning LNK4197: export 'PyInit_Cython_Mod1' specified multiple times; using first specification
LNK4197 is a warning, as such it shouldn't affect the compilation of your
Cython probably just generates code that exports that function multiple times (for good reasons, I'd assume).
PyInit_<modname> is responsible for initializing the module; if your modules get initialized and imported correctly you have no issues. It won't affect the performance and/or result in erroneous execution.