[flang-commits] [flang] [flang] Fix extra "./" prefix in source file paths (PR #186212)

[Caroline Newcombe via flang-commits]

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@@ -63,9 +63,21 @@ std::optional<std::string> LocateSourceFile(
   if (name == "-" || llvm::sys::path::is_absolute(name)) {
     return name;
   }
+  // Check if file exists at original path to preserve user's format.
+  bool isDir{false};
+  const auto er = llvm::sys::fs::is_directory(name, isDir);
+  if (!er && !isDir) {
+    return name;
+  }
+  // Normalize: strip leading "./" to avoid "././file" with "." search paths.
+  llvm::StringRef nameRef(name);
+  if (nameRef.starts_with("./")) {
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cenewcombe wrote:

The new commit avoids matching on `/`

https://github.com/llvm/llvm-project/pull/186212