[PATCH][4.3] Deprecate -ftrapv

[Robert Dewar]

FX Coudert wrote:
>> C: integer overflow undefined, checking desirable at least for
>> debugging purposes.
>>
>> I think latest Fortran is same as C, can someone confirm?
> 
> Yes, it is. Overflow undefined and no checking required; I think very  
> few Fortran users actually use (or would use) checking on signed  
> overflow.

But assuming the gcc is playing C-style games, it is probably a useful
thing to be able to verify that your code is free of such possibilities.
> 
> FX
>