[clang] [llvm] [modules] Accept equivalent module caches from different symlink (PR #90925)

[Ben Langmuir via cfe-commits]

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@@ -833,32 +833,33 @@ bool SimpleASTReaderListener::ReadPreprocessorOptions(
 /// against the header search options in an existing preprocessor.
 ///
 /// \param Diags If non-null, produce diagnostics for any mismatches incurred.
-static bool checkHeaderSearchOptions(const HeaderSearchOptions &HSOpts,
+static bool checkHeaderSearchOptions(llvm::vfs::FileSystem &VFS,
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benlangmuir wrote:

I realize you're not changing the _behaviour_ here, but now that we don't even pass in a `HeaderSearchOptions` we should probably rename this. Maybe `checkModuleCachePath`?

https://github.com/llvm/llvm-project/pull/90925