`[tool.setuptools.ext-modules]` in `pyproject.toml` is still *experimental* ?

[Andrej730]

Hi! Wanted to clarify if tool.setuptools.ext-modules is pyproject.toml is still considered experimental and should stick to setup.py if plan to use ext_modules?

There's currently a warning added about a year ago in bf768e0 _ExperimentalConfiguration: [tool.setuptools.ext-modules] in pyproject.toml is still *experimental* and likely to change in future releases.

Is there's some issue to track progress on this - to know when it would be safer to switch? (couldn't find one)

[abravalheri]

Hi @Andrej730,

It is still considered experimental because it likely to evolve.
Right now the implementation is the bare minimum to allow simple extensions to be specified via pyproject.toml, but in a bit more complex scenarios it may not be enough.

While I find it difficult that such simple extensions will stop working in the future, to be sure it would be necessary to have a complete vision and design of how this feature will work (and also how it can interplay with other packages like Cython , mypyc or numpy.get_include()).