• src/sage/env.py uses distutils.sysconfig.get_python_inc() which is deprecated, it has no replacement in sysconfig.

Suggestion from fbissey: "we could use sysconfig.get_config_var('INCLUDEPY') which should give the same value." #33135 comment:7

We also remove the use of SAGE_LIB in preparation of namespace packages.

This is the last use of distutils in the Sage library, except for uses in src/sage/features/__init__.py and src/sage/misc/cython.py, which are merely fallbacks when setuptools is not present.

Comment from arojas: "I don't see any code in sagelib or cython that would emit this. Is this still needed at all?"

Follow-up: Once these uses of distutils are removed, their modules can be removed from the regex in the call to filterwarnings introduced by #33135.

Part of

• Meta-ticket Meta-ticket: Replace imports from deprecated distutils #31295: Replace imports from deprecated distutils
• Meta-ticket Meta-ticket: Remove use of SAGE_LIB and SAGE_EXTCODE variables #33037: Remove use of SAGE_LIB and SAGE_EXTCODE variables

Depends on #32873

CC: @antonio-rojas @dimpase

Component: misc

Author: Frédéric Chapoton, Matthias Koeppe

Issue created by migration from https://trac.sagemath.org/ticket/33137