[PATCH][4.3] Deprecate -ftrapv

Toon Moene toon@moene.indiv.nluug.nl
Thu Mar 6 15:09:00 GMT 2008


FX Coudert wrote:

[ Sorry, I'm way, way behind ]

>> 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.

In Fortran, integers are used to index arrays.  So if you want integer 
overflow checking, use -fbounds-check :-)

-- 
Toon Moene - e-mail: toon@moene.indiv.nluug.nl - phone: +31 346 214290
Saturnushof 14, 3738 XG  Maartensdijk, The Netherlands
At home: http://moene.indiv.nluug.nl/~toon/
Progress of GNU Fortran: http://gcc.gnu.org/ml/gcc/2008-01/msg00009.html



More information about the Gcc mailing list