[PING] PR 28322 unknown -Wno-* options should cause warnings, not errors

[Peter Maydell]

This is a ping for this patch:

http://gcc.gnu.org/ml/gcc-patches/2008-06/msg00139.html

which fixes a problem with the initial fix for PR 28322 (which
suppresses messages about unknown -Wno-* options unless some other
diagnostic is being emitted). The code as it stands in SVN means
that -Wno-unrecognised-something sometimes changes the exit status
of gcc, whereas it was intended to never have that effect.

The discussion got derailed into whether the original feature was
a good idea, but nobody seemed to be complaining about the patch
itself. Can it be applied?

thanks
-- Peter Maydell