================
@@ -4772,6 +4772,23 @@ bool
ASTWriter::PreparePathForOutput(SmallVectorImpl<char> &Path) {
Changed = true;
}
+ // If we are generating a normal PCH (EG. not a C++ module).
+ if (!WritingModule) {
+ // Use the vfs overlay if it exists to translate paths.
+ auto &FileSys =
+ Context->getSourceManager().getFileManager().getVirtualFileSystem();
+
+ if (auto *RFS = dyn_cast<llvm::vfs::RedirectingFileSystem>(&FileSys)) {
----------------
sheredom wrote:
So tried this, and there are problems. `getRealPath` requires that the remapped
path already exists, and so will fail (returning the original path again)
because the remapped location doesn't exist (because we are wanting to remap to
some fake directory!).
https://github.com/llvm/llvm-project/pull/106577
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