Flang enablement is not the issue anymore for NumPy. It is building correctly now on x86_64.

On AArch64, there is a problem regarding mcpu flags that is probably an issue on how the frontend passes them to the backend in clang++, or a mistake in the NumPy build system, i.e.:

These are C++ issues, not Fortran. So, from a Flang perspective, this is completed.

However, I’ll keep an eye out for anyone hitting this on AArch64.

Daniel Chen is just starting to work on Flang’s procedure pointers support.

Blocked on Flang procedure pointers support.

List of outstanding issues with last update till January from Usman:

Missing support for procedure pointers: Peixin (Huawei) from upstream is working on implementing this. A few patches were recently committed.

output for selected_real_kind(0) intrinsic does not the match output for gfortran.

Upstream suggested that changing the test case is the correct solution

Semantic check fails in numpy/f2py/tests/test_callback.py

Seems like an f2py generates incorrect/noncompliant fortran code

Segmentation fault in numpy/f2py/tests/test_value_attrspec.py

• TODO

> not yet implemented: intrinsic: selected_real_kind. Ticket:

Fixed upstream

"not yet implemented: procedure pointers". Discussion here:

RFC in progress -