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

[Caleb Zulawski via Phabricator via cfe-commits]

calebzulawski updated this revision to Diff 490698.
calebzulawski added a comment.

This revision is basically the same as before, but with two changes:

- `darwin` targets (e.g. `x86_64-apple-darwin`) do not automatically detect the SDK. There is another bug where these targets don't seem to properly pass the target version (e.g. `x86_64-apple-darwin9`) whenever an SDK is provided.
- A new flag `--no-detect-xcode` disables this detection.

Fingers crossed, this passes all tests for me locally.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D136315/new/

https://reviews.llvm.org/D136315

Files:
  clang/docs/UsersManual.rst
  clang/include/clang/Driver/Options.td
  clang/lib/Driver/ToolChains/Darwin.cpp
  clang/test/Driver/darwin-ld-platform-version-macos.c
  clang/test/Driver/darwin-sdk-detect.c

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