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-rw-r--r--clang/lib/Tooling/Tooling.cpp6
1 files changed, 6 insertions, 0 deletions
diff --git a/clang/lib/Tooling/Tooling.cpp b/clang/lib/Tooling/Tooling.cpp
index f143f7fe71f..cfdb32f0ae6 100644
--- a/clang/lib/Tooling/Tooling.cpp
+++ b/clang/lib/Tooling/Tooling.cpp
@@ -303,6 +303,12 @@ bool ToolInvocation::run() {
const std::unique_ptr<driver::Driver> Driver(
newDriver(&Diagnostics, BinaryName, Files->getVirtualFileSystem()));
+ // The "input file not found" diagnostics from the driver are useful.
+ // The driver is only aware of the VFS working directory, but some clients
+ // change this at the FileManager level instead.
+ // In this case the checks have false positives, so skip them.
+ if (!Files->getFileSystemOpts().WorkingDir.empty())
+ Driver->setCheckInputsExist(false);
const std::unique_ptr<driver::Compilation> Compilation(
Driver->BuildCompilation(llvm::makeArrayRef(Argv)));
if (!Compilation)
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