[clang] [clang][modules] Determine if the SDK supports builtin modules independent of the target (PR #134005)

[Volodymyr Sapsai via cfe-commits]

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@@ -62,6 +63,28 @@ DarwinSDKInfo::RelatedTargetVersionMapping::parseJSON(
       Min, Max, MinValue, MaximumDeploymentTarget, std::move(Mapping));
 }
 
+static llvm::Triple::OSType parseOS(const llvm::json::Object &Obj) {
+  // The CanonicalName is the Xcode platform, a version, and an optional suffix,
+  // e.g. macosx16.0.
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vsapsai wrote:

The example doesn't have a suffix, as far as I can tell. Up to you if you want to make it more representative.

https://github.com/llvm/llvm-project/pull/134005