MaskRay added a comment.

In D145849#4430870 <https://reviews.llvm.org/D145849#4430870>, @ilammy wrote:

> In D145849#4412286 <https://reviews.llvm.org/D145849#4412286>, @MaskRay wrote:
>
>> However, `Triple.isMacOSX()` is allowed before the feature actually works 
>> and `compiler-rt/test/xray/lit.cfg.py` tests it.
>
> I have some patches for `compiler-rt` cooking, fixing the build for AArch64. 
> Should those go in first, before `clang` is ultimately allowed to use 
> `-fxray-instrument` when targeting AArch64, so that everything works out of 
> the box?
>
> For me, Clang is able to compile binaries with XRay sections (with this 
> change), but I have `compiler-rt` disabled and not linked in, since it's not 
> possible to build it for AArch64 yet.
>
> I thought it could be done separately. I was not aware of those tests in 
> compiler-rt, checking all archs.
>
> I guess the build should be fixed first, then this change should 
> simultaneously allow clang to target AArch64 and update compiler-rt's 
> expectations of what works.
>
> How does that sound to you?

Since Mach-O porting is supposed to be done soon, I think landing this change 
is fine. This patch should make fixing the underlying issue easier as we don't 
need to locally patch XRayArgs.cpp...

I think D152661 <https://reviews.llvm.org/D152661> is very much desired and 
ideally landed before other fixes.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D145849/new/

https://reviews.llvm.org/D145849

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