[C++] fix alias and members

[Nathan Sidwell]

On 06/08/10 20:19, Jason Merrill
> static void f() __attribute ((weakref, alias ("g")));
>
> int main()
> {
> if (f)
> f();
> }
>
> does not require a definition of g. Apparently weakrefs are different
> from weak aliases; I was previously confusing the two. But this case
> still involves attribute "alias".

hm, ok, but a weakref must have static (local) linkage, which is something a 
member function cannot have.  The case where a member function could behave 
as-if it had static linkage would be in an anonymous namespace.  But in that 
case the class itself is local to the TU.  So again, I think we're ok.

nathan

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