[PATCH] D136315: [clang][Darwin] Try to guess the SDK root with xcrun when unspecified

[Caleb Zulawski via Phabricator via cfe-commits]

calebzulawski added a comment.

I don't think we necessarily need to revert due to the xcrun quirk since I think it's harmless, though I can provide a follow up change if necessary.  I just checked Rust's source as a comparison and it appears that for macOS targets it will always attempt to invoke xcrun regardless of host as well.  I could see a macOS cross-compiler environment providing an xcrun replacement, for example.  The test failures are another issue but I still don't quite understand the cause.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D136315/new/

https://reviews.llvm.org/D136315