LLVM/Clang currently lack support for Apple's visionOS ("xros" platform in triples)

[allevato]

With Apple having released Xcode 15.2 GM this week, it would benefit folks who build other language tooling with LLVM/Clang using this repository to have support for the xros operating system in target triples (and whatever similar logic is needed in Clang to support XROS.platform and XRSimulator.platform).

Currently only Xcode's compilers support it, so any attempt to build tools with llvm/llvm-project that need to process xros triples fail unless support for the OS is manually patched in.

[tkremenek]

On the Apple side we are actively working on this, and hope to have patches up soon.

[andrewrk]

Why is it called "xros" in the triple?

[Rexicon226]

Why is it called "xros" in the triple?

This was the internal initial development name given to it, before being changed to visionOS "last minute" iirc. However it might have only been changed to visionOS on the outside, with internals still using "xros"?

[cyndyishida]

Initial support is up for review at: #77707
We're working on follow-up patches and can close out this issue once those are merged.

[allevato]

Thank you @cyndyishida !

[JDevlieghere]

Cyndy landed the Mach-O support (#78373) and I've merged support for visionos in the clang driver (#78392) and lldb (#78389). I believe this covers the platform so I'm going to mark this as resolved.

[arielttt0]

does the lld linker support linking of xros aswell? because when i try for example enter: lld -arch arm64 -platform_version xros 1.0.0 1.0 i get "malformed platform: xros"

[cyndyishida]

does the lld linker support linking of xros aswell? because when i try for example enter: lld -arch arm64 -platform_version xros 1.0.0 1.0 i get "malformed platform: xros"

Looks like it was added about 3 weeks ago. #83031 If you're seeing issues on TOT, please file an additional issue.