lookup10.c

gcc-you can use this code to learn something about gcc, and inquire further into linux,

// Build don't link:

// Copyright (C) 2000 Free Software Foundation
// Contributed by Nathan Sidwell 3 July 2000 <[e-mail]>
// We'd get confused entering a namespace via an alias

namespace Outer {
  namespace Render_Real {
    typedef void Type;
  }

  namespace Core_Real {}  
  namespace Core = Core_Real;

  namespace Core_Real {
    template<class T> void Foo (T *) {}
  }

  template<> void Core::Foo<> (Render_Real::Type *) {}
}