btw: All the dependencies seem to be in Debian already,... building is done with CMake.
The python bindings work with python3, but it seems that per default CMake picks up Python2 instead. I had to set -DPYTHON_EXECUTABLE:FILEPATH=/usr/bin/python3 for CMake,... then it worked. https://github.com/google/s2geometry/issues/46 seems to show some other CMake ways to do this. Cheers, Chris.