typename in templates - gcc errors

Pressing on I am working through the generator files. These are a set of files that generate the output. The biggest problem I found so far in these is some template definitions that tripped up gcc which requires a typename to be specified in some circumstances where visual c++ was quite happy. The following class - when complied on XCode

template <class T>
class Foo
{
public:
  Foo(const T&);
  std::list<T*>::iterator Bar();
};

Results in error: expected ';' before 'Bar'

Adding typename fixes the problem - so the gcc friendy Bar looks like this:

  typename std::list<T*>::iterator Bar();

As with many compiler errors the error message gave me little insight into the problem. I tracked down the solution looking through the boost libraries for code that returns an iterator.