Backporting to 4_0 the latest friend bits

[Mark Mitchell]

Paolo Carlini wrote:
> Hi Mark,
> 
> 
>>I agree; that's why I asked to see the patches.
> 
> 
> Humm, maybe a couple of links are in order, for your convenience:
> 
>     http://gcc.gnu.org/ml/gcc-cvs/2005-03/msg00681.html
>     http://gcc.gnu.org/ml/gcc-cvs/2005-03/msg00679.html
> 
> (I understand that Kriang volunteered to regtest and, if necessary (most
> likely not) tweak the patches for actual 4.0 inclusion)

Those are somewhat above my pain threshold.  Is there something else 
that we could do for the 4.0 branch?  Like issue a warning and ignore 
the friend declaration?  Am I correct in understand that the problem 
case is that the friend declaration looks like "friend class C" where 
there is a C in a containing scope, but no C in the class with the 
friend declaration?

-- 
Mark Mitchell
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