C++ PATCH: Fix PR 862

[Mark Mitchell]

Thanks for doing this!

Just to be clear, when you remove (unsupported option) -fbar from
lang-options.h for C++, does that mean that the C front-end will now
complain about -fbar, whereas it would silently ignore it if it were
still there?  If so, that represents a behavior change from the
previous version of GCC which presumably would have silently ignored
the option.  Is that correct, or do I misunderstand?

If that is the case, I'm not sure it's a problem.  (I've always
thought that silently ignoring options was a little odd; it fails the
principle of least surprise, in my opinion.)

So, I think the patch is OK, but I think maybe someone else (Jason
Merrill?) should have a chance to comment if I'm guessing right above.

If I'm wrong, then the patch is definitely OK.

Thanks,

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Mark Mitchell                   mark@codesourcery.com
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