Support installing CPython 3.13.0a2+ with the --disable-gil flag

[edgarrmondragon]

Too many issues will kill our team's development velocity, drastically.
Make sure you have checked all steps below.

Prerequisite

• Make sure your problem is not listed in the common build problems.
• Make sure no duplicated issue has already been reported in the pyenv issues. You should look for closed issues, too.
• Make sure you are not asking us to help solving your specific issue.
  • GitHub issues is opened mainly for development purposes. If you want to ask someone to help solving your problem, go to some community site like Gitter, StackOverflow, etc.
• Make sure your problem is not derived from packaging (e.g. Homebrew).
  • Please refer to the package documentation for the installation issues, etc.
• Make sure your problem is not derived from plugins.
  • This repository is maintaining pyenv and the default python-build plugin only. Please refrain from reporting issues of other plugins here.

Description

CPython 3.13.0a2+ supports a build time --disable-gil flag. It would be great if pyenv install supported installing a GIL-less CPython either with a flag similar to the existing -g/--debug flag or with new, GIL-less, versions like 3.13.0a2-nogil.

[native-api]

You can pass any custom Configure options via the PYTHON_CONFIGURE_OPTS envvar. See https://github.com/pyenv/pyenv/blob/master/plugins/python-build/README.md#special-environment-variables .

[edgarrmondragon]

@native-api Gotcha, that seemed to work. For reference:

$ PYTHON_CONFIGURE_OPTS='--disable-gil' pyenv install 3.13-dev
$ pyenv shell 3.13-dev
$ python3.13 -c 'import sysconfig; print(sysconfig.get_config_var("Py_GIL_DISABLED"))'
1

Thanks!

[ZmicierGT]

Is there a way to install two 3.13-dev versions but to different directories to test builds both with enabled and disabled gil? Pyenv-alias plugin does not work any more, just renaming folders will break the installation.

[native-api]

Is there a way to install two 3.13-dev versions but to different directories to test builds both with enabled and disabled gil? Pyenv-alias plugin does not work any more, just renaming folders will break the installation.

It is possible by calling Python-build directly. See its --help and README.

[ZmicierGT]

@native-api Thank you, it helped. Some details for those who'll search for it in the future. You may find python-build readme here. The sequence of commands I used:

% python-build 3.13-dev /Users/zmicier/.pyenv/versions/3.13-dev_gil
% PYTHON_CONFIGURE_OPTS='--disable-gil' pyenv install 3.13-dev
% pyenv shell 3.13-dev_gil
% python3.13 -c 'import sysconfig; print(sysconfig.get_config_var("Py_GIL_DISABLED"))'
0
% pyenv shell 3.13-dev
% python3.13 -c 'import sysconfig; print(sysconfig.get_config_var("Py_GIL_DISABLED"))'
1

However, seems that the current nogil implementation is less stable than the experimental nogil 3.9.10 fork.