libselinux fails to build with preparing Swig 4.3.0. Jitka tested rebuild in Copr:
https://copr.fedorainfracloud.org/coprs/jplesnik/swig-rebuild/build/8116850/
due to an incompatible change in Swig
https://github.com/swig/swig/blob/master/CHANGES.current
"[Python] #2907 Fix returning null from functions with output
parameters. Ensures OUTPUT and INOUT typemaps are handled
consistently wrt return type.

New declaration of SWIG_Python_AppendOutput is now:

SWIG_Python_AppendOutput(PyObject* result, PyObject* obj, int is_void);

The 3rd parameter is new and the new $isvoid special variable
should be passed to it, indicating whether or not the wrapped
function returns void.

Also consider replacing with:

SWIG_AppendOutput(PyObject* result, PyObject* obj);

which calls SWIG_Python_AppendOutput with same parameters but adding $isvoid
for final parameter."