On Tue, Nov 12, 2019 at 12:41 AM Matti Picus <matti.picus@gmail.com>
wrote:
Apple has dropped support for Accelerate. It has bugs that have not been
fixed, and is closed source so we cannot fix them ourselves. We have
been getting a handful of reports from users who end up building NumPy
on macOS, and inadvertently link to Accelerate, then end up with wrong
linalg results. In PR 14880https://github.com/numpy/numpy/pull/14880 I
propose to disallow finding it when building NumPy. At this time it will
remain in distutils as one of the backends to support users, but how do
people feel about a future PR to totally remove it?
Someone pointed out that Apple has not officially dropped support as far as it can be determined. Sorry for the bad information. However, I still stand by the "has bugs that have not been fixed, and is closed source". An alternative to dropping automatic support for it would be to find a channel for engaging with Apple to report and fix the bugs.
That's been tried, repeatedly. I would suggest not to spend time on that. Apple knows, they have just decided it's not important to them.
Spending time on contributing to either OpenBLAS or BLIS/libFLAME seems like a more useful activity.
Cheers,
Ralf