I am not able to build a Python wrapper module for my C library via CMake and Swig for Python3. Everything works fine for Python2.x but it looks like CMake cannot find Pytho
CMake 3.12 should help you with your issue. Citing the release notes:
New “FindPython3” and “FindPython2” modules, as well as a new “FindPython” module, have been added to provide a new way to locate python environments.