Python 3.14 compatibility: replace deprecated distutils.sysconfig with sysconfig

[HavenCTO]

Tested libtorrent 2.0.11 against Python 3.14.2. The core library and bindings work perfectly—all 94 tests pass—but the build fails because distutils is gone.

We need to swap distutils.sysconfig for sysconfig in two places:

1. bindings/python/CMakeLists.txt

diff

- import distutils.sysconfig
- print(distutils.sysconfig.get_python_lib(prefix='', plat_specific=True))
+ import sysconfig
+ print(sysconfig.get_path('platlib', vars={'platbase': '', 'base': ''}))

2. bindings/python/Jamfile

diff

- python-path = [ SHELL "$(python-interpreter) -c \"import distutils.sysconfig; import sys; sys.stdout.write(distutils.sysconfig.get_python_lib())\"" ] ;
+ python-path = [ SHELL "$(python-interpreter) -c \"import sysconfig; import sys; sys.stdout.write(sysconfig.get_path('platlib'))\"" ] ;

With these applied, Python 3.14 support is fully functional. We should also update cibuildwheel to include 3.14 in the CI matrix.

[HavenCTO]

#8138

[xavier2k6]

@HavenCTO Does it build python bindings on windows ok?

Also distutils is uses in setup.py

https://github.com/arvidn/libtorrent/blob/RC_2_0/bindings/python/setup.py

[xavier2k6]

Does it build python bindings on windows ok?

Even with these changes, python bindings fail in CI due to issues relating to test.py

setuptools I believe, needs to be used instead of distutils where possible.

[xavier2k6]

We should also update cibuildwheel to include 3.14 in the CI matrix.

As soon as CI for python bindings passes, work on cibuildwheel can continue.

[xavier2k6]

@arvidn PEP 632 – Deprecate distutils module

[HavenCTO]

Here were the results for the unit tests - Ran 94 tests in 21.867s OK All 94 tests PASSED with Python 3.14.2.

This was on a linux system and I have not tried Windows.

Thank you for advising @xavier2k6