https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65547
--- Comment #7 from Edward Diener <eldlistmailingz at tropicsoft dot com> --- (In reply to Jonathan Wakely from comment #5) > And as has been documented forever, the way to get diagnostics for GNU > extensions that contradict the ISO standard is the -pedantic switch: > > https://gcc.gnu.org/onlinedocs/gcc-4.9.2/gcc/Warning-Options.html#index- > pedantic-279 > > There is no bug here. So the GNU extension in this case is that the programmer does not have to pass an argument when a variadic parameter is used in a macro ? That would not even bother me if there were a compiler flag which allowed it. But you appear to be telling me that this non-C++ is by default. OK, how do I tell gcc to actually follow the C++ standard ? Do I pass '-pedantic' for that ? I realize gcc is used by many programmers and is loath to change the way it has done things so as not to upset long-time users of the compiler. Nonetheless I am going to suggest that the default should always be conformance to the C++ standard, and that GNU extensions should be turned on with some compiler option.
