On Mon, Oct 24, 2011 at 8:29 AM, Jason Merrill <ja...@redhat.com> wrote: > On 10/24/2011 09:26 AM, Gabriel Dos Reis wrote: >> >> On Mon, Oct 24, 2011 at 8:06 AM, Jason Merrill<ja...@redhat.com> wrote: > >>> No. I added -Wno-narrowing specifically to suppress the diagnostic in >>> C++0x >>> mode; see c++/49793. There are several diagnostics required by standards >>> that can be suppressed by -Wno- flags, such as -Wno-long-long. >> >> I do not think I follow. The way we suppress a standard feature is >> through >> a non-W flag. -Wno-long-long should not have any effect at all in C++11. >> It may have an effect in C++03. > > Right, -Wno-long-long is only useful in C++03 and C90. But it does in fact > suppress a standard diagnostic.
a diagnostic of an extension :-) Similarly, -Wno-narrowing suppresses diagnostic in C++03 when -Wc++0x-compat is in effect (therefore C++03). However, just like -Wno-long-long, it should not have any effect when -std=c++0x or -std=c++11.
