Adopt a consistent POSIX layout

Feature or enhancement

Proposal:

Currently, the Python installation directory for stdlib/platstdlib and purelib/platlib is defined as {implementation_lower}{py_version_short}{abi_thread}, and for include/platinclude as {implementation_lower}{py_version_short}{abiflags}.

I would like to make it consistent with {implementation_lower}{py_version_short}{abiflags}.

Currently, I believe this will mostly affect debug builds, which will receive their own separate directory.

Has this already been discussed elsewhere?

No response given

Links to previous discussion of this feature:

In https://github.com/python/cpython/issues/121103, we added {abi_thread}.
In https://github.com/python/cpython/issues/127294, we discuss some of the impact of mixed installations.

Beginne mit der Durchsicht der Diskussion in den Issues 121103 und 127294 und verfolge anschließend, wie die Installationspfade für stdlib, platstdlib, purelib, platlib, include und platinclude definiert werden. Prüfe die Auswirkungen auf Debug- und gemischte Installationen; abgeschlossen ist die Arbeit, wenn die betroffenen Pfade konsistent {implementation_lower}{py_version_short}{abiflags} verwenden, ohne diese Fälle zu beeinträchtigen.