https://gcc.gnu.org/bugzilla/show_bug.cgi?id=26732
--- Comment #9 from Eric Gallager <egallager at gcc dot gnu.org> --- (In reply to Harald van Dijk from comment #8) > (In reply to Eric Gallager from comment #7) > > (In reply to Andrew Pinski from comment #6) > > > Now we don't even error out at -O3. > > > > Why would the -O3 matter? > > -O3 enables inlining, which up until GCC 4.2 triggered an error on the > parameter/argument type mismatch. > > But GCC is correct to not report an error for that. This is only undefined > at runtime, so the compiler is required to allow this unless it can prove > the execution will reach that point of the code. > > What's missing as of GCC 4.0 is GCC 3.4's default-enabled warning "warning: > structure defined inside parms". ah ok gotcha
