python39/PACKAGING-NOTES
Matej Cepl 81e576898b - Add CVE-2025-0938-sq-brackets-domain-names.patch which
disallows square brackets ([ and ]) in domain names for parsed
  URLs (bsc#1236705, CVE-2025-0938, gh#python/cpython#105704)

OBS-URL: https://build.opensuse.org/package/show/devel:languages:python:Factory/python39?expand=0&rev=222
2025-02-07 08:50:25 +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.