Support NumPy 2.0

[jakirkham]

Hi All 👋

NumPy is planning to release 2.0 on June 16th ( numpy/numpy#24300 (comment) ). NumPy 2.0.0 RC packages for conda & wheels came out at the beginning of April ( numpy/numpy#24300 (comment) )

NumPy has put out a migration guide. More details are in the release notes

If Cython BLIS makes use of NumPy's C API (and produces wheels that use it), having a release of Cython BLIS with wheels built against NumPy 2.0.0 RC would be helpful to ensure NumPy 1 & 2 compatible wheels (as wheels built against NumPy 1 won't be compatible with NumPy 2). More details in this NumPy 2 ABI doc. Note that Cython is compatible with NumPy 2 so it is possible just configuring builds with NumPy 2 is sufficient

Also as NumPy is tracking ecosystem support for NumPy 2.0, it would be helpful to share Cython BLIS current support status in issue (with any plans): numpy/numpy#26191

[honnibal]

Thanks! Yes this is very much on our radar 👍

[jakirkham]

Am seeing references to NumPy 2 in PR ( #108 ) and v1.0.0

Does that mean this has been addressed?

If so, might be worth noting the NumPy 2 compatible version of Cython BLIS in upstream issue: numpy/numpy#26191