When I try to run the tests with Python 3.13.0a2 on Linux, I see the following 3 failures: FAILED tests/unit/create/via_global_ref/builtin/cpython/test_cpython3_win ...

A trivial example of embedding python and invoking a c callback is given in main.c; too see it in active build, and then run: This is a replacement buildsystem for Python. The existing (autotools ...