[Openmp-commits] [llvm] [openmp] [openmp] Add support for arm64ec/arm64x to libomp (PR #175988)

[David Truby via Openmp-commits]

DavidTruby wrote:

> But as an initial comment, I’d suggest you split this up into two PRs; one first for adding arm64ec support overall, and another (later) one for building arm64x.

The reason I didn't do that is you can't actually use (and therefore test) the arm64ec libomp.dll without the arm64x building support, because libomp doesn't support having multiple runtimes built at the same time without `PER_TARGET_RUNTIME_DIR` on, and `PER_TARGET_RUNTIME_DIR` isn't supported on Windows. So the library does technically get built but you can't actually test it.

https://github.com/llvm/llvm-project/pull/175988