pip should rebuild the cython module when it is missing in the downloaded wheel

[yurivict]

Feature or enhancement

Proposal:

The wheel for the GPy package lacks cython-compiled binary modules on the ARM64 architecture.

For example, the choleskies_cython cython submodule is only available for the x86_64 architecture:

[yuri@yv /tmp/GPy-wheel/GPy]$ find .  | grep choleskies
./util/choleskies_cython.cpython-311-x86_64-linux-gnu.so
./util/choleskies_cython.c
./util/choleskies.py
./util/choleskies_cython.pyx

When the binary should be present (the corresponding *.c and *.pyx files are present) but is missing, pip should rebuild this binary during the pip install xx command.

In Python-3.11 pip installs a broken GPy module on the ARM64 architecture.

Has this already been discussed elsewhere?

No response given

Links to previous discussion of this feature:

No response

[nineteendo]

Isn't this a problem with GPy?

[yurivict]

Isn't this a problem with GPy?

This is a problem in GPy. However, many projects can't build for all architectures for the lack of hardware or expertise.
pip has the ability to rebuild such missing binaries because it is already running on that architecture.
pip shouldn't create broken installations, and instead it should rebuild missing binaries.

[terryjreedy]

This tracker is for CPython. PIP is a separate project with a separate web site, etc. https://pip.pypa.io/en/stable/