PATCH: Warn about __attribute__((strong)) in docs

[Jason Merrill]

On Sun, 18 Apr 2004 15:07:34 -0700, Mark Mitchell <mark@codesourcery.com> wrote:

> Jason, I'd like your thoughts on removing this extension, perhaps even
> before 3.4.1.  I don't think we fully understand what it means yet,
> and we can always add it back if and when we think it's necessary.
> Thoughts?

I'm opposed to removing it; it's currently necessary to allow
standard-conforming code to work in debug mode.

I actually think the desired semantics are pretty well-defined, though
there are still bugs:

Arg-dependent lookup of things in the used namespace also considers the
  using namespace.
Any lookup of things in the using namespace also considers the used
  namespace.

We thought for a while that there should be special linkage semantics, but
I think we all agree now that there shouldn't.  The remaining problems have
to do with some lookups failing to obey #2.

Jason