Adopt a consistent POSIX layout

[FFY00]

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 #121103, we added {abi_thread}.
In #127294, we discuss some of the impact of mixed installations.

[encukou]

This sounds like a big change.
Are you sure that consistency is reason enough to do this?

[picnixz]

Maybe raise this on Discuss (and it looks like this needs a PEP)