[PATCH] D55673: [darwin] parse the SDK settings from SDKSettings.json if it exists and pass in the -target-sdk-version to the compiler and backend

[Steven Wu via Phabricator via cfe-commits]

steven_wu accepted this revision.
steven_wu added a comment.
This revision is now accepted and ready to land.

Other than a small design choice commented inline, LGTM.



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Comment at: include/clang/Driver/DarwinSDKInfo.h:36
+/// SDK has no SDKSettings.json, or a valid \c DarwinSDKInfo otherwise.
+Expected<Optional<DarwinSDKInfo>> parseDarwinSDKInfo(llvm::vfs::FileSystem &VFS,
+                                                     StringRef SDKRootPath);
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arphaman wrote:
> steven_wu wrote:
> > Isn't parseSDKSettings enough? And it can just return Optional<VersionTuple>?
> We will support other fields besides `VersionTuple` in the SDKSettings, so that's why we have a structure.
I feel like for this usage, it is better to return Expected<DarwinSDKInfo> with all the fields being Optional?


Repository:
  rC Clang

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  https://reviews.llvm.org/D55673/new/

https://reviews.llvm.org/D55673