Python 3.12 builds fail because imp has been deprecated and removed

[ShadowJonathan]

Title, https://docs.python.org/3.11/library/imp.html

[tseaver]

This patch should fix the imp error:

--- a/enscons/cpyext.py
+++ b/enscons/cpyext.py
@@ -10,8 +10,8 @@ from distutils.core import Distribution
 from distutils.extension import Extension
 from distutils.command.build_ext import build_ext
 
-import imp
 import importlib
+import importlib.machinery
 
 # not used when generate is passed directly to Environment
 def exists(env):
@@ -88,7 +88,7 @@ def get_build_ext(name="zoot"):
 # from setuptools
 def get_abi3_suffix():
     """Return the file extension for an abi3-compliant Extension()"""
-    for suffix, _, _ in (s for s in imp.get_suffixes() if s[2] == imp.C_EXTENSION):
+    for suffix in importlib.machinery.EXTENSION_SUFFIXES:
         if ".abi3" in suffix:  # Unix
             return suffix
         elif suffix == ".pyd":  # Windows

But then enscons still wants to use distutils, which was deprecated in Python 3.10 and removed in Python 3.12 per PEP 632.

[dholth]

Yes, enscons would prefer to be patched to work with Python 3.12

Too bad that we use distutils to get compiler information. Although perhaps its sauce is not that secret? (IIRC there are only a few revelant cflags)

[dholth]

Thanks. Do you have time to look over the PR?

CC @tseaver @charliermarsh @richardkiss

Sometimes it seems like github prioritizes notifications from "every random project except my own".