Re: Default warnings and useless extensions (e.g. arithmetic on void *)

[Andrew Pinski <pinskia at gmail dot com>]

Sent from my iPhone

On Jun 10, 2008, at 11:45, Tim Prince <TimothyPrince@sbcglobal.net>  
wrote:

> Vincent Lefevre wrote:
> > On 2008-06-09 16:02:05 +0200, Richard Guenther wrote:
> >
> > > Use -pedantic to warn about extensions. It doesn't make sense to
> > > warn for extensions if they are not deprecated. After all they are
> > > extensions.
> >
> > The problem with -pedantic is that it gives lots of spurious  
> > warnings.
> > We have code that uses useful (i.e. with no workarounds) extensions
> > and that is protected by #if, e.g.
> >
> > #ifdef HAVE_LONG_LONG
> >            case LONG_LONG_ARG:
> >              *(long long *) p = (long long) nchar;
> >              break;
> > #endif
> long long is an extension, if you don't specify -std=c99. You ask  
> for warnings about extensions, you get them.  Why didn't you post  
> this on gcc-help?

Also -Wno-long-long will disable the warning for long long. :)