• Have you followed the guidelines for contributing?
• Have you checked that there aren't other open pull requests for the same formula update/change?
• Have you built your formula locally with brew install --build-from-source <formula>, where <formula> is the name of the formula you're submitting?
• Is your test running fine brew test <formula>, where <formula> is the name of the formula you're submitting?
• Does your build pass brew audit --strict <formula> (after doing brew install <formula>)?

The op-avx flag disables building features that take advantage of AVX
instructions.

Since open-mpi is able to detect CPU features at runtime, disabling
this is not necessary, and simply leads to lower performance for users
with newer machines.

See also open-mpi/ompi#8306, open-mpi/ompi#8361.