KEMBAR78
gh-133951: Remove lib64->lib symlink in venv creation by Cycloctane · Pull Request #137139 · python/cpython · GitHub
Skip to content

Conversation

@Cycloctane
Copy link
Contributor

@Cycloctane Cycloctane commented Jul 27, 2025

venv creates a lib64->lib symlink on posix platforms (except osx) to make purelib and platlib always share the same directory in all dists (#65396). This can cause problems on filesystems without symlink support. It is also not necessary anymore because venv now creates lib paths in venv directory based on sysconfig. Others should also use sysconfig to get the correct lib paths.

@Cycloctane Cycloctane requested review from FFY00 and vsajip as code owners July 27, 2025 07:49
@python-cla-bot
Copy link

python-cla-bot bot commented Jul 27, 2025

All commit authors signed the Contributor License Agreement.

CLA signed

@bedevere-app
Copy link

bedevere-app bot commented Jul 27, 2025

Most changes to Python require a NEWS entry. Add one using the blurb_it web app or the blurb command-line tool.

If this change has little impact on Python users, wait for a maintainer to apply the skip news label instead.

@bedevere-app
Copy link

bedevere-app bot commented Jul 27, 2025

Most changes to Python require a NEWS entry. Add one using the blurb_it web app or the blurb command-line tool.

If this change has little impact on Python users, wait for a maintainer to apply the skip news label instead.

@picnixz
Copy link
Member

picnixz commented Jul 27, 2025

More generally, could it cause issues with platforms that are configured with --with-platlibdir=lib64? On OpenSUSE I need to explicitly specify this when doing ./configure, otherwise Python won't be correctly installed.

It is also not necessary anymore because venv now creates lib paths in venv directory based on sysconfig.

Is there a possibility that this could somehow conflict with legacy venvs? or with some weird sysconfig? If this is causing issues on platforms without symlink support why not just checking if that platform supports symlinks and, if not, do nothing?

@Cycloctane
Copy link
Contributor Author

could it cause issues with platforms that are configured with --with-platlibdir=lib64?

The difference on these platforms is that platlib and purelib modules will be installed into separated directory (lib64/ and lib/) as defined in posix_venv installation scheme. This is also virtualenv's current behavior.

Is there a possibility that this could somehow conflict with legacy venvs?

I think this only affects venv creation. Legacy venvs should still be able to run.

If this is causing issues on platforms without symlink support why not just checking if that platform supports symlinks and, if not, do nothing?

In my understanding this symlink is not needed in anyway. Other paths created by venv are all looked up from venv scheme sysconfig except this symlink which is hard-coded and created even unnecessary. So I remove it for consistency.

Copy link
Member

@FFY00 FFY00 left a comment

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Thanks for the PR!

There's a possibility it would break user code when users are hardcoding the path, or not using the venv scheme. Though, the code is already fundamentally broken in both those situations, so I agree with this change.

That said, if possible, I'd like @vsajip to also have a look before merging.

@Cycloctane, please ping me in 1~2 weeks if the PR hasn't moved.

Copy link
Member

@vsajip vsajip left a comment

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

I'm OK with this change, though of course there might be a backwards compatibility issue for someone; but I guess we can deal with it if and when it happens.

@Cycloctane Cycloctane requested a review from FFY00 September 10, 2025 09:43
@Cycloctane
Copy link
Contributor Author

Cycloctane commented Sep 19, 2025

please ping me in 1~2 weeks if the PR hasn't moved.

@FFY00 :)

@FFY00
Copy link
Member

FFY00 commented Oct 4, 2025

@Cycloctane, sorry for the delay!

@FFY00 FFY00 merged commit a7a4855 into python:main Oct 4, 2025
45 checks passed
StanFromIreland added a commit to StanFromIreland/cpython that referenced this pull request Oct 5, 2025
danigm pushed a commit to openSUSE-Python/cpython that referenced this pull request Oct 7, 2025
…37139)

* Remove lib64->lib symlink in venv directory

* fix test

* remove unused import

* add news
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Labels

None yet

Projects

None yet

Development

Successfully merging this pull request may close these issues.

4 participants