declaring a protected member function as friend

[ralph@xxxxxxxxxx (Ralph Gauges)]

Hi,

I recently installed gcc4 (20050130) on some of my machines and all of the sudden I can not compile some code that worked fine with gcc 3.3 (20030304).
Suddenly if a declare a friend function in some class that is a protected member function in another class gcc4 complains that the function is protected in this context. This is actually correct, but I could not find any documentation that this was not allowed in C++. Am I doing something wrong, or is this a bug since it worked with gcc3?

Ralph

Here is some sample code that compiles on gcc 3.3 and fails on gcc 4.0

class A{
    protected:
        void test(){};
};

class B{
    public:
        friend void A::test();
};