Do we support aarch64 UNIX builds without FP16?

[oddfacade]

I'm building for a Cortex A57 VM that doesn't support FP16 instructions, so I can't build with -march=armv8.2-a+fp16. However, without the +fp16 enabled globally I get errors about optimized ASM methods failing to inline, caused by this. I can get around this by preventing MLAS_F16VEC_INTRINSICS_SUPPORTED from being set here, however this option does not seem to be directly configurable.

So my question has two parts:

1. Is my understanding here correct?
2. Would there be interest in making this option configurable, or is there perhaps a better approach? I have a patch that I am using for my builds, but I would be happy to upstream it.