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Re: [warning control] New #pragma GCC diagnostic
> Those are bugs, and part of DJ's work is to categorize those
> warnings so that they can be turned off.
When I was working on those, it seemed to be commonly accepted that
there can't feasibly be 100% coverage with the OPT_* values. Each
time I suggested that the rule be "every warning be controllable,
either individually or in some group," it was shot down.