#include <fstream>
+using std::endl;
+using std::flush;
+using std::getline;
+using std::string;
+using std::ofstream;
+using std::ifstream;
-namespace lyx {
-#ifndef CXX_GLOBAL_CSTD
-using std::time;
-#endif
+namespace lyx {
using support::FileName;
using support::ltrim;
using support::suffixIs;
using support::sum;
-using std::endl;
-using std::flush;
-using std::getline;
-using std::string;
-using std::ofstream;
-using std::ifstream;
-
inline
bool DepTable::dep_info::changed() const
{