On 06/30/2012 05:10 PM, Pádraig Brady wrote: > This should address it: > > commit 8f4dcad477da1a952a04478ae125d5453f29dcc9 > Author: Pádraig Brady <[email protected]> > Date: Sun Jul 1 00:04:37 2012 +0100 > > maint: avoid a -Wunsed-but-set warning on some systems > > * src/stty.c (main): Mark speed_was_set as unused when > CIBAUD undefined (like on ppc64 GNU/Linux for example). > Reported-by: Stefano Lattarini > > diff --git a/src/stty.c b/src/stty.c > index 83b502c..b2dd849 100644 > --- a/src/stty.c > +++ b/src/stty.c > @@ -737,7 +737,11 @@ main (int argc, char **argv) > int argi = 0; > int opti = 1; > bool require_set_attr; > +#ifdef CIBAUD > bool speed_was_set; > +#else > + bool speed_was_set ATTRIBUTE_UNUSED; > +#endif
Three lines too many. ATTRIBUTE_UNUSED is defined by gcc to mean 'might be unused, therefore don't warn if it was not used', and not 'must not be used, and therefore warn if it is used'. Therefore, it is always safe to use the one-liner: bool speed_was_set ATTRIBUTE_UNUSED; even if, when CIBAUD is defined, it was actually used. No need for extra #ifdef. -- Eric Blake [email protected] +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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