gnat -m31/-m32 broken on 64bit with gcc 4.x

[Arnaud Charlet]

> I believe you that this is not an easy job. Maybe it is eased a bit by the
> recent toplevel bootstrap changes?!

I do not think so. The situation wrt multilib has not changed AFAIK.

And in any case, this toplevel bootstrap change is still incomplete wrt
Ada (missing passing flags to Ada Makefile) AFAIK, so the situation is
currently (temporarily) worse.

Arno