Patch to enable -Werror [take 2]

[Zack Weinberg]

DJ Delorie <dj@redhat.com> writes:

>> I'd call that obvious.  The matching gcc_AC_CHECK_DECLS entry is
>> already in configure.in so it was clearly intended to be that way
>> all along.  Yeah, that's it.
>
> It not obvious, and it's not even correct.  GCC is not the only
> package using libiberty.

I don't see how a patch to gcc/system.h affects anyone else.

zw