how to deal with variable set but not used warnings?

[Cy Schubert]

In message <CANCZdfryUsjsqn7izpX9BM354-9013oazxiKAz-5cSFj7m5p0A at mail.gma
il.com>
, Warner Losh writes:
> On Sun, Jun 3, 2018 at 3:28 PM, Rick Macklem <rmacklem at uoguelph.ca> wrote:
>
> > mmacy has sent me a bunch of warnings of the "variable set but not used"
> > kind
> > generated by gcc8.
> >
> > When I've looked at the code, these are for RPC arguments I parse but do
> > not
> > use at this time.
> > I'd  like to leave the code in place, since these arguments may be needed
> > in the
> > future and it is hard to figure out how to get them years from now, when
> > they
> > might be needed.
> > I can think of 3 ways to handle this:
> > 1 - Get rid of the code. (As above, I'd rather not do this.)
> > 2 - Wrap the code with "#if 0"/"#endif" or similar. I'll admit that I find
> > this rather
> >       ugly and tends to make the code harder to follow.
> > 3 - Leave the code and add a comment w.r.t. why the variables are set but
> > not used.
> >
> > So, what do others think is the preferable alternative?
> > (Or maybe you have a #4 that seems better than any of these.)
> >
>
> 4. Disable the stupid warning in the Makefile / build system. If you don't
> care, and there's a good reason for what you are doing (sounds like there
> is), better to just disable the warning as so much useless noise.

And leave a comment in the Makefile in case someone decides to 
re-enable the warning at some later date.


-- 
Cheers,
Cy Schubert <Cy.Schubert at cschubert.com>
FreeBSD UNIX:  <cy at FreeBSD.org>   Web:  http://www.FreeBSD.org

	The need of the many outweighs the greed of the few.