[libcxx-commits] [libcxx] [libunwind][libc++][libc++abi] Add cross-compilation flags to tests (PR #67201)

[Louis Dionne via libcxx-commits]

ldionne wrote:

> I think it would be good if all of them did it, the reason I didn't is that I limited it to the ones I can test locally. Seeing as there is probably CI coverage for all of the configs, should I try updating the remaining ones?

Yes, I think it makes sense for all of them to use that variable. Can you confirm that this is basically empty all the time except if you're using a custom CMake toolchain file?

https://github.com/llvm/llvm-project/pull/67201