[cfe-dev] Warning at always true condition

[Matthieu Monrocq]

On Tue, Jun 12, 2012 at 2:04 AM, Seth Cantrell <bames53 at gmail.com> wrote:

> There's a -Weverything which I think you can use to check to see if a bit
> of code triggers any warnings.
>
> On Jun 11, 2012, at 7:10 AM, Devchandra L Meetei wrote:
>
> > Hi All
> > Does clang support any switch to warn about a conditional eg in if(p*
> !='h' || p* !='H'), which is always true.
> >
> >
> > Thankss in reply for  timely response
> >
> > Warm Reagrds
> > --Dev
> > _______________________________________________
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> > cfe-dev at cs.uiuc.edu
> > http://lists.cs.uiuc.edu/mailman/listinfo/cfe-dev
>
>
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Yes, this is actually the very purpose of -Weverything, it actives
everything so you can discover new warnings.

If the output is too verbose, the diagnostics tell you what flags activated
them so you can turn them off with the "no-" version:  -Weverything
-Wno-unused.

-- Matthieu
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