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python39/PACKAGING-NOTES
Matej Cepl ad933f5c9f - Update to 3.9.20:
- Tests
    - gh-112769: The tests now correctly compare zlib version when
      :const:`zlib.ZLIB_RUNTIME_VERSION` contains non-integer suffixes. For
      example zlib-ng defines the version as ``1.3.0.zlib-ng``.
    - gh-117187: Fix XML tests for vanilla Expat <2.6.0.
  - Security
    - gh-123678: Upgrade libexpat to 2.6.3
    - gh-121957: Fixed missing audit events around interactive use of Python,
      now also properly firing for ``python -i``, as well as for ``python -m
      asyncio``. The event in question is ``cpython.run_stdin``.
    - gh-122133: Authenticate the socket connection for the
      ``socket.socketpair()`` fallback on platforms where ``AF_UNIX`` is not
      available like Windows.
      Patch by Gregory P. Smith <greg@krypto.org> and Seth Larson
      <seth@python.org>. Reported by Ellie <el@horse64.org>
    - gh-121285: Remove backtracking from tarfile header parsing for
      ``hdrcharset``, PAX, and GNU sparse headers
      (bsc#1230227, CVE-2024-6232).
    - gh-118486: :func:`os.mkdir` on Windows now accepts *mode* of ``0o700`` to
      restrict the new directory to the current user. This fixes CVE-2024-4030
      affecting :func:`tempfile.mkdtemp` in scenarios where the base temporary
      directory is more permissive than the default.
    - gh-114572: :meth:`ssl.SSLContext.cert_store_stats` and
      :meth:`ssl.SSLContext.get_ca_certs` now correctly lock access to the
      certificate store, when the :class:`ssl.SSLContext` is shared across
      multiple threads (bsc#1226447, CVE-2024-0397).
    - gh-116741: Update bundled libexpat to 2.6.2
  - Library
    - gh-123270: Applied a more surgical fix for malformed payloads in

OBS-URL: https://build.opensuse.org/package/show/devel:languages:python:Factory/python39?expand=0&rev=201
2024-09-09 20:10:25 +00:00

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Notes for packagers of Python3
==============================
0. Faster build turnaround
--------------------------
By default, python builds with profile-guided optimization. This needs
an additional run of the test suite and it is generally slow.
PGO build takes around 50 minutes.
For development, use "--without profileopt" option to disable PGO. This
shortens the build time to ~5 minutes including test suite.
1. import_failed.map
----------------------
This is a mechanism installed as part of python3-base, that places shim modules
on python's path (through a generated zzzz-import-failed-hooks.pth file, so that
it is imported as much at the end as makes sense; and an _import_failed subdir
of /usr/lib/pythonX.Y). Then when the user tries to import a module that is part
of a subpackage, the ImportError will contain a helpful message telling them
which missing subpackage to install.
This can sometimes cause problems on non-standard configurations, if the pth
gets included too early (for instance if you are using a script to include all
pths by hand in some strange order). Just something to look out for.