[llvm-commits] Enable -Wcovered-switch-default in our builds

[Rafael Espíndola]

> Out of curiosity - we turn on a bunch of other warninngs (-Wall and
> -Wwrite-strings) by default without configure options in the Makefile
> - is it worth plumbing this through as optional like this, rather than
> just turning it on by default in the same way?
>
> (& thanks for doing this, in any case)

I guess it is just a distinction of old, known to be available options
and newer ones.

> Another thing we had been discussing was moving this option under
> -Wall, but that never really got fully hashed out.
>
> - David
>

Cheers,
Rafael