On Wed, Apr 26, 2017 at 09:57:28PM +0200, Mason wrote:
> > The manual says:
> >
> > """
> > When an unrecognized warning option is requested (e.g.,
> > @option{-Wunknown-warning}), GCC emits a diagnostic stating
> > that the option is not recognized. However, if the @option{-Wno-} form
> > is used, the behavior is slightly different: no diagnostic is
> > produced for @option{-Wno-unknown-warning} unless other diagnostics
> > are being produced. This allows the use of new @option{-Wno-} options
> > with old compilers, but if something goes wrong, the compiler
> > warns that an unrecognized option is present.
> > """
> >
> > In your example another diagnostic _is_ produced.
>
> The documentation I was looking at was
>
> https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html
>
> which AFAIU currently applies to GCC 6.
>
>
> Thanks for pointing out the -Wfatal-errors text.
That text isn't for any specific option. It is a bit confusingly
placed, perhaps.
> My example was using gcc 4.8; perhaps the GCC devs have
> improved the handling of -Wno-error over several versions.
https://gcc.gnu.org/onlinedocs/gcc-4.8.5/gcc/Warning-Options.html
Segher
