Re: UB in general ... and linux/bitops.h in particular

[Jeffrey Walton]

>    -- Perhaps the compiler guys could be persuaded to support
>     the needed features explicitly, perhaps via a command-line
>     option: -std=vanilla
>     This should be a no-cost option as things stand today, but
>     it helps to prevent nasty surprises in the future.

It looks LLVM has the -rainbow option; see
http://blog.llvm.org/2016/04/undefined-behavior-is-magic.html :)

Jeff