[PATCH][4.3] Deprecate -ftrapv

[Robert Dewar]

> (Off topic, but I'd expect that avionics software is engineered with
> enough layers of protection, including catching traps, so that a
> -ftrapv hit would not cause a deep impact.)

Actually this discussion is not *so* off-topic.

if you regard -ftrapv as something that would be enabled in critical
code in the final production build, you have a much different view,
than if it is a debugging aid, which can help to find bugs, but makes
no guarantees.