Python -VV should display whether the build is default build or free-threading.

Currently, there is no way to identify whether the build is free-threaded or not through python -VV
See the pyperf and pyperformance case

The following display would be great.

Python 3.14.0a0 (heads/main-dirty:31a28cbae0, May 17 2024, 17:30:32, default) [GCC 14.1.1 20240507 (Red Hat 14.1.1-1)]

Python 3.14.0a0 (heads/main-dirty:31a28cbae0, May 17 2024, 17:30:32, free-threading) [GCC 14.1.1 20240507 (Red Hat 14.1.1-1)]

Linked PRs

@hugovk

cc @hugovk @vstinner @colesbury

pythongh-119132: Update buildinfo to identify free-threaded or not.

pythongh-119132: Log sys._is_gil_disabled() in test.pythoninfo

If we cannot agree on changing sys.version, at least, python -VV can be modified in Python/initconfig.c:

    if (print_version) {
        printf("Python %s\n",
                (print_version >= 2) ? Py_GetVersion() : PY_VERSION);
        return _PyStatus_EXIT(0);
    }

The code can be modified to log if Python is built with free-threading or not.

gh-119132: Log sys._is_gil_enabled() in test.pythoninfo (#119140)

pythongh-119132: Log sys._is_gil_enabled() in test.pythoninfo (python…

[3.13] gh-119132: Log sys._is_gil_enabled() in test.pythoninfo (GH-11…

If we cannot agree on changing sys.version, at least, python -VV can be modified in Python/initconfig.c:

It's better!

pythongh-119132: Display free-threading information through -VV

gh-119132: Update sys.version to identify free-threaded or not. (gh-1…

pythongh-119132: Update sys.version to identify free-threaded or not. (…

[3.13] gh-119132: Update sys.version to identify free-threaded or not. (

pythongh-119132: Log sys._is_gil_enabled() in test.pythoninfo (python…

pythongh-119132: Update sys.version to identify free-threaded or not. (…

Merge remote-tracking branch 'upstream/main' into pythongh-119132-remove

gh-119132: Remove "experimental" tag from the CPython free-threading. (…