[BUG]: Compatibility issues between pybind11 and Py_LIMITED_API.

[1271653627]

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What version (or hash if on master) of pybind11 are you using?

3.0.1

Problem description

I wrote a demo using pybind11 and setuptools to install a function that prints "hello world" for use in Python. However, when I try to make the wheel package support multiple Python versions above 3.10, enabling Py_LIMITED_API results in an error. The error log is in the attachment, along with setup.py and my_extension.cpp.

However, if I compile using the pure Python C API, there are no issues (as shown in the commented section of my_extension.cpp). However, for the actual project I need to build the wheel package, the code is quite complex, and writing it with the pure Python C API is not very practical.

error.log
my_extension.cpp
setup.py

Reproducible example code

Is this a regression? Put the last known working version here if it is.

Not a regression

[oremanj]

pybind11 does not support Python's limited API or stable ABI. The support would require fairly large changes which are unlikely to occur soon. Depending on your needs, you may find success with nanobind, a similar project that supports the limited API / stable ABI on Python 3.12 and later. There are a number of pybind11 features that nanobind does not support, but for simple binding projects you're likely to have a fine time with either library.