On Thu, 5 Mar 2026 at 06:19, Akihiko Odaki <[email protected]> wrote: > > https://gcc.gnu.org/onlinedocs/gcc-15.2.0/gcc/Warning-Options.html > > Level 2 warns also about calls that might overflow the destination > > buffer given an argument of sufficient length or magnitude. At level > > 2, unknown numeric arguments are assumed to have the minimum > > representable value for signed types with a precision greater than 1, > > and the maximum representable value otherwise. Unknown string > > arguments whose length cannot be assumed to be bounded either by the > > directive’s precision, or by a finite set of string literals they may > > evaluate to, or the character array they may point to, are assumed to > > be 1 character long. > > Signed-off-by: Akihiko Odaki <[email protected]> > --- > meson.build | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/meson.build b/meson.build > index 414c8ea7e280..cf50bc492f9c 100644 > --- a/meson.build > +++ b/meson.build > @@ -692,6 +692,7 @@ warn_flags = [ > '-Wempty-body', > '-Wendif-labels', > '-Wexpansion-to-defined', > + '-Wformat-overflow=2', > '-Wformat-security', > '-Wformat-y2k', > '-Wignored-qualifiers',
I can build with both gcc and clang with this extra warning enabled without it falling over on anything else, so Reviewed-by: Peter Maydell <[email protected]> thanks -- PMM
