#include "llvm/Support/Signals.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/raw_ostream.h"
-#include "llvm/Support/system_error.h"
#include <algorithm>
#include <cctype>
#include <map>
#include <string>
+#include <system_error>
#include <vector>
using namespace llvm;
+using std::error_code;
static cl::opt<std::string>
CheckFilename(cl::Positional, cl::desc("<check-file>"), cl::Required);