Merge remote-tracking branch 'origin/main' into rebranch

include/swift/Basic/LangOptions.h

@@ -670,6 +670,10 @@ namespace swift {
   /// Options for controlling the behavior of the Clang importer.
   class ClangImporterOptions final {
   public:
+    /// The path to the Clang compiler executable.
+    /// Used to detect the default include paths.
+    std::string clangPath = "clang";
+
     /// The module cache path which the Clang importer should use.
     std::string ModuleCachePath;