[PATCH] D24799: [XRay] Check in Clang whether XRay supports the target when -fxray-instrument is passed

[Dean Michael Berris via cfe-commits]

dberris added a comment.

What does the error actually look like? Can you add a test for it? It's unclear to me how this would read... for example does it say "XRay for arm is unsupported"?


https://reviews.llvm.org/D24799