#include "llvm/ADT/Optional.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringRef.h"
-#include "llvm/Support/system_error.h"
+#include <system_error>
#include <utility> // for std::pair
namespace llvm {
-
+using std::error_code;
/// \brief Class that manages the creation of a lock file to aid
/// implicit coordination between different processes.
///