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gh-157384: Set package context in PyImport_CreateModuleFromInitfunc() by itamaro · Pull Request #157387 · python/cpython · GitHub

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gh-157384: Set package context in PyImport_CreateModuleFromInitfunc() - #157387

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encukou merged 2 commits into
python:mainfrom
itamaro:gh-116146-initfunc-pkgcontext
Oct 13, 2026
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gh-157384: Set package context in PyImport_CreateModuleFromInitfunc()#157387
encukou merged 2 commits into
python:mainfrom
itamaro:gh-116146-initfunc-pkgcontext

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itamaro commented Sep 13, 2026 •
edited by bedevere-app Bot
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A single-phase init function that creates its module using only the last component of a dotted name (as pybind11 does for submodules) got a module whose name was the short name. Set the package context while calling the init function, as the dynamic loader does, so the module gets the full name from the spec.

AI assisted with Claude Fable 5.1

pythongh-157384: Set package context in PyImport_CreateModuleFromInit…
238cdb7 
…func()

A single-phase init function that creates its module using only the
last component of a dotted name (as pybind11 does for submodules) got
a module whose __name__ was the short name.  Set the package context
while calling the init function, as the dynamic loader does, so the
module gets the full name from the spec.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HoZE3WdRWQshvinfBZ137N
bedevere-app Bot mentioned this pull request Sep 13, 2026
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itamaro requested a review from encukou September 13, 2026 01:41

read-the-docs-community Bot commented Sep 13, 2026 •
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Documentation build overview

📚 cpython-previews | 🛠️ Build #35117573 | 📁 Comparing d386116 against main (2cd6d4b)

  🔍 Preview build  

111 files changed · + 8 added · ± 103 modified

+ Added

± Modified

itamaro added the needs backport to 3.15 bugs and security fixes label Sep 13, 2026

encukou commented Sep 14, 2026

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Would it be possible to fix the binding generator instead?

itamaro commented Sep 14, 2026

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Would it be possible to fix the binding generator instead?

In what way?

afaik pybind11 3+ already defaults to multi-phase init, so this issue is mostly with older pybind11 extensions (2.13 and older), or hand-written C extensions.

this fix makes this API honor the documented cpython contract for single-phase init extensions.

encukou mentioned this pull request Sep 18, 2026
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encukou commented Sep 18, 2026

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Ah, I see. I'm looking at this in detail now.

This PR works as something to backport (to 3.15.1 at this point, which should be only a small inconvenience for embedders).

But before merging, I'd like to settle on a bigger refactoring for 3.16; perhaps we'll find more to backport. Could I ask you to take a look at #157758?

itamaro commented Sep 18, 2026

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But before merging, I'd like to settle on a bigger refactoring for 3.16; perhaps we'll find more to backport. Could I ask you to take a look at #157758?

reviewed your PR - looks like a great refactor! left some comments there, but I don't think there's anything else worth backporting in addition to this PR (and maybe gh-157389).

I agree about the backport targeting 3.15.1 and not 3.15.0.

encukou commented Sep 29, 2026

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I'll get back to this after the 3.15 release -- fix a few wording nitpicks & merge.

itamaro commented Oct 9, 2026

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@encukou happy post-3.15.0-release! :)

should we get this merged now? what nitpicks did you want to change?

encukou approved these changes Oct 13, 2026
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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

should we get this merged now? what nitpicks did you want to change?

Yep. Just docs in the end, sorry for the wait.

Comment thread Doc/c-api/import.rst Outdated
encukou enabled auto-merge (squash) October 13, 2026 13:02
encukou merged commit 0486228 into python:main Oct 13, 2026
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miss-islington-app Bot commented Oct 13, 2026

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Thanks @itamaro for the PR, and @encukou for merging it 🌮🎉.. I'm working now to backport this PR to: 3.15.
🐍🍒⛏🤖

bedevere-app Bot commented Oct 13, 2026

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GH-159316 is a backport of this pull request to the 3.15 branch.

bedevere-app Bot removed the needs backport to 3.15 bugs and security fixes label Oct 13, 2026

bedevere-bot commented Oct 13, 2026

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⚠️⚠️⚠️ Buildbot failure ⚠️⚠️⚠️

Hi! The buildbot iOS ARM64 Simulator 3.x (tier-3) has failed when building commit 0486228.

What do you need to do:

  1. Don't panic.
  2. Check the buildbot page in the devguide if you don't know what the buildbots are or how they work.
  3. Go to the page of the buildbot that failed (https://buildbot.python.org/#/builders/1380/builds/8043) and take a look at the build logs.
  4. Check if the failure is related to this commit (0486228) or if it is a false positive.
  5. If the failure is related to this commit, please, reflect that on the issue and make a new Pull Request with a fix.

You can take a look at the buildbot page here:

https://buildbot.python.org/#/builders/1380/builds/8043

Summary of the results of the build (if available):

Click to see traceback logs 
remote: Enumerating objects: 32, done.        
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remote: Total 17 (delta 15), reused 3 (delta 2), pack-reused 0 (from 0)        
From https://github.com/python/cpython
 * branch                    main       -> FETCH_HEAD
Note: switching to '04862280a2ccbf9be9883eb4bce886f6b1bc4ca0'.

You are in 'detached HEAD' state. You can look around, make experimental
changes and commit them, and you can discard any commits you make in this
state without impacting any branches by switching back to a branch.

If you want to create a new branch to retain commits you create, you may
do so (now or later) by using -c with the switch command. Example:

  git switch -c <new-branch-name>

Or undo this operation with:

  git switch -

Turn off this advice by setting config variable advice.detachedHead to false

HEAD is now at 04862280a2c gh-157384: Set package context in PyImport_CreateModuleFromInitfunc() (GH-157387)
Switched to and reset branch 'main'

configure: WARNING: no system libmpdec found; falling back to pure-Python version for the decimal module
configure: WARNING: pkg-config is missing. Some dependencies may not be detected correctly.
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:282:5: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  282 |     CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |     ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:289:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  289 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
../../Modules/expat/xmltok_impl.c:86:5: note: expanded from macro 'CHECK_NAME_CASES'
   86 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:435:5: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  435 |     CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |     ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:442:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  442 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
../../Modules/expat/xmltok_impl.c:86:5: note: expanded from macro 'CHECK_NAME_CASES'
   86 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:548:5: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  548 |     CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |     ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:557:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  557 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
../../Modules/expat/xmltok_impl.c:86:5: note: expanded from macro 'CHECK_NAME_CASES'
   86 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:579:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  579 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
../../Modules/expat/xmltok_impl.c:86:5: note: expanded from macro 'CHECK_NAME_CASES'
   86 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:590:9: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  590 |         CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |         ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:687:11: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  687 |           CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |           ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:732:5: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  732 |     CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |     ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:758:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  758 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
../../Modules/expat/xmltok_impl.c:86:5: note: expanded from macro 'CHECK_NAME_CASES'
   86 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:769:9: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  769 |         CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |         ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:782:11: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  782 |           CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |           ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:927:5: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  927 |     CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |     ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:940:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  940 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
../../Modules/expat/xmltok_impl.c:86:5: note: expanded from macro 'CHECK_NAME_CASES'
   86 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:957:5: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  957 |     CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |     ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:964:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  964 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
../../Modules/expat/xmltok_impl.c:86:5: note: expanded from macro 'CHECK_NAME_CASES'
   86 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:1199:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
 1199 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
../../Modules/expat/xmltok_impl.c:86:5: note: expanded from macro 'CHECK_NAME_CASES'
   86 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:1219:11: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
 1219 |           CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |           ^
../../Modules/expat/xmltok_impl.c:86:5: note: expanded from macro 'CHECK_NAME_CASES'
   86 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
19 warnings generated.

configure: WARNING: pkg-config is missing. Some dependencies may not be detected correctly.
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:282:5: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  282 |     CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |     ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:289:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  289 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
../../Modules/expat/xmltok_impl.c:86:5: note: expanded from macro 'CHECK_NAME_CASES'
   86 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:435:5: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  435 |     CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |     ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:442:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  442 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
../../Modules/expat/xmltok_impl.c:86:5: note: expanded from macro 'CHECK_NAME_CASES'
   86 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:548:5: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  548 |     CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |     ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:557:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  557 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
../../Modules/expat/xmltok_impl.c:86:5: note: expanded from macro 'CHECK_NAME_CASES'
   86 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:579:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  579 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
../../Modules/expat/xmltok_impl.c:86:5: note: expanded from macro 'CHECK_NAME_CASES'
   86 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:590:9: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  590 |         CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |         ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:687:11: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  687 |           CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |           ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:732:5: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  732 |     CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |     ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:758:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  758 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
../../Modules/expat/xmltok_impl.c:86:5: note: expanded from macro 'CHECK_NAME_CASES'
   86 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:769:9: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  769 |         CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |         ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:782:11: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  782 |           CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |           ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:927:5: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  927 |     CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |     ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:940:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  940 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
../../Modules/expat/xmltok_impl.c:86:5: note: expanded from macro 'CHECK_NAME_CASES'
   86 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:957:5: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  957 |     CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |     ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:964:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  964 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
../../Modules/expat/xmltok_impl.c:86:5: note: expanded from macro 'CHECK_NAME_CASES'
   86 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:1199:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
 1199 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
../../Modules/expat/xmltok_impl.c:86:5: note: expanded from macro 'CHECK_NAME_CASES'
   86 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:1219:11: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
 1219 |           CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |           ^
../../Modules/expat/xmltok_impl.c:86:5: note: expanded from macro 'CHECK_NAME_CASES'
   86 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
19 warnings generated.
ld: warning: ignoring duplicate libraries: '-lm'
ld: warning: ignoring duplicate libraries: '-lm'
configure: WARNING: pkg-config is missing. Some dependencies may not be detected correctly.
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:282:5: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  282 |     CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |     ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:289:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  289 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
../../Modules/expat/xmltok_impl.c:86:5: note: expanded from macro 'CHECK_NAME_CASES'
   86 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:435:5: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  435 |     CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |     ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:442:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  442 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
../../Modules/expat/xmltok_impl.c:86:5: note: expanded from macro 'CHECK_NAME_CASES'
   86 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:548:5: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  548 |     CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |     ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:557:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  557 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
../../Modules/expat/xmltok_impl.c:86:5: note: expanded from macro 'CHECK_NAME_CASES'
   86 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:579:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  579 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
../../Modules/expat/xmltok_impl.c:86:5: note: expanded from macro 'CHECK_NAME_CASES'
   86 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:590:9: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  590 |         CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |         ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:687:11: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  687 |           CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |           ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:732:5: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  732 |     CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |     ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:758:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  758 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
../../Modules/expat/xmltok_impl.c:86:5: note: expanded from macro 'CHECK_NAME_CASES'
   86 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:769:9: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  769 |         CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |         ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:782:11: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  782 |           CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |           ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:927:5: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  927 |     CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |     ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:940:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  940 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
../../Modules/expat/xmltok_impl.c:86:5: note: expanded from macro 'CHECK_NAME_CASES'
   86 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:957:5: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  957 |     CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |     ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:964:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  964 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
../../Modules/expat/xmltok_impl.c:86:5: note: expanded from macro 'CHECK_NAME_CASES'
   86 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:1199:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
 1199 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
../../Modules/expat/xmltok_impl.c:86:5: note: expanded from macro 'CHECK_NAME_CASES'
   86 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:1219:11: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
 1219 |           CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |           ^
../../Modules/expat/xmltok_impl.c:86:5: note: expanded from macro 'CHECK_NAME_CASES'
   86 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
19 warnings generated.
ld: warning: ignoring duplicate libraries: '-lm'
ld: warning: ignoring duplicate libraries: '-lm'
configure: WARNING: x86_64-apple-ios-simulator/clang is not supported
configure: WARNING: pkg-config is missing. Some dependencies may not be detected correctly.
configure: WARNING:

Platform "x86_64-apple-ios-simulator" with compiler "clang" is not supported by the
CPython core team, see https://peps.python.org/pep-0011/ for more information.

In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:282:5: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  282 |     CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |     ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:289:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  289 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
../../Modules/expat/xmltok_impl.c:86:5: note: expanded from macro 'CHECK_NAME_CASES'
   86 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:435:5: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  435 |     CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |     ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:442:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  442 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
../../Modules/expat/xmltok_impl.c:86:5: note: expanded from macro 'CHECK_NAME_CASES'
   86 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:548:5: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  548 |     CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |     ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:557:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  557 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
../../Modules/expat/xmltok_impl.c:86:5: note: expanded from macro 'CHECK_NAME_CASES'
   86 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:579:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  579 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
../../Modules/expat/xmltok_impl.c:86:5: note: expanded from macro 'CHECK_NAME_CASES'
   86 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:590:9: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  590 |         CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |         ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:687:11: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  687 |           CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |           ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:732:5: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  732 |     CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |     ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:758:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  758 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
../../Modules/expat/xmltok_impl.c:86:5: note: expanded from macro 'CHECK_NAME_CASES'
   86 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:769:9: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  769 |         CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |         ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:782:11: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  782 |           CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |           ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:927:5: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  927 |     CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |     ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:940:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  940 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
../../Modules/expat/xmltok_impl.c:86:5: note: expanded from macro 'CHECK_NAME_CASES'
   86 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:957:5: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  957 |     CHECK_NMSTRT_CASES(enc, ptr, end, nextTokPtr)
      |     ^
../../Modules/expat/xmltok_impl.c:115:5: note: expanded from macro 'CHECK_NMSTRT_CASES'
  115 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:964:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
  964 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
../../Modules/expat/xmltok_impl.c:86:5: note: expanded from macro 'CHECK_NAME_CASES'
   86 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:1199:7: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
 1199 |       CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |       ^
../../Modules/expat/xmltok_impl.c:86:5: note: expanded from macro 'CHECK_NAME_CASES'
   86 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
In file included from ../../Modules/expat/xmltok.c:326:
../../Modules/expat/xmltok_impl.c:1219:11: warning: fallthrough annotation in unreachable code [-Wunreachable-code-fallthrough]
 1219 |           CHECK_NAME_CASES(enc, ptr, end, nextTokPtr)
      |           ^
../../Modules/expat/xmltok_impl.c:86:5: note: expanded from macro 'CHECK_NAME_CASES'
   86 |     EXPAT_FALLTHROUGH;                                                         \
      |     ^
../../Modules/expat/fallthrough.h:47:33: note: expanded from macro 'EXPAT_FALLTHROUGH'
   47 | #      define EXPAT_FALLTHROUGH __attribute__((fallthrough))
      |                                 ^
19 warnings generated.
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: libpython3.16.a(brc.o) has no symbols
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: libpython3.16.a(dynamic_annotations.o) has no symbols
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: libpython3.16.a(gc_free_threading.o) has no symbols
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: libpython3.16.a(index_pool.o) has no symbols
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: libpython3.16.a(jit.o) has no symbols
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: libpython3.16.a(jit_publish.o) has no symbols
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: libpython3.16.a(optimizer_analysis.o) has no symbols
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: libpython3.16.a(optimizer_symbols.o) has no symbols
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: libpython3.16.a(pystats.o) has no symbols
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: libpython3.16.a(stackrefs.o) has no symbols
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: libpython3.16.a(uniqueid.o) has no symbols
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: libpython3.16.a(perf_jit_trampoline.o) has no symbols
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: libpython3.16.a(jit_unwind.o) has no symbols
ld: warning: ignoring duplicate libraries: '-lm'
ld: warning: ignoring duplicate libraries: '-lm'

--- xcodebuild: WARNING: Using the first of multiple matching destinations:
{ platform:iOS Simulator, id:4F9AFDE7-A49A-46AD-B161-FCA22E48EA55, OS:18.3.1, name:iPhone SE (3rd generation) }
{ platform:iOS Simulator, id:4F9AFDE7-A49A-46AD-B161-FCA22E48EA55, OS:18.3.1, name:iPhone SE (3rd generation) }

encukou pushed a commit that referenced this pull request Oct 14, 2026
[3.15] gh-157384: Set package context in PyImport_CreateModuleFromIni…
33a05de 
…tfunc() (GH-157387) (GH-159316)

A single-phase init function that creates its module using only the
last component of a dotted name (as pybind11 does for submodules) got
a module whose __name__ was the short name.  Set the package context
while calling the init function, as the dynamic loader does, so the
module gets the full name from the spec.
(cherry picked from commit 0486228)

Co-authored-by: Itamar Oren <itamarost@gmail.com>
meta-codesync Bot pushed a commit to facebookincubator/MetaPython that referenced this pull request Oct 15, 2026
Backport gh-157384: Set package context in PyImport_CreateModuleFromI…
0a8cedb 
…nitfunc()

Summary:
Backport of the upstream fix (python/cpython#157387, 3.15 backport python/cpython#159316), folded into the `05-native-python-api` patch that carries our 3.14 backport of `PyImport_CreateModuleFromInitfunc`.

A single-phase init function that creates its module using only the last component of a dotted name (as pybind11 2.13 does for `PYBIND11_MODULE` extensions inside a package) got a module whose `__name__` was the short name, so `def_submodule` registered submodules under the wrong `sys.modules` keys and `from pkg.ext.sub import x` failed with "`pkg.ext` is not a package". 571 failures in V66 of the py3.14 canary (D82323768) carry this signature.

Reviewed By: alexmalyshev

Differential Revision: D119701167

fbshipit-source-id: dc50c5ece93752c069548588545eee6526181cad
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