gcc/testsuite/g++.old-deja/g++.pt/friend15.C

// { dg-do assemble  }

class S1
{
  template <class T>
  friend class S2;

  static int i;
};


template <class T>
class S2
{
public:
  static void f() { S1::i = 3; }
};


void g()
{
  S2<double>::f();
  S2<char>::f();
}