// { dg-do assemble  }// This is a test case for the recent libg++ make check problem.class SubString {public:  SubString();  SubString(const SubString& x);};class String {public:  String();  String(const SubString&  x);};int operator!=(const String& x, const SubString&  y);int operator!=(const String& x, const String& y);int operator!=(const SubString& x, const String& y);int operator!=(const SubString& x, const SubString&  y);void comparetest(){    String x;  SubString s;  x != s;}