https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64867
--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to Tom Tromey from comment #5) > (In reply to Jason Merrill from comment #3) > > Passing a non-POD to a varargs function is conditionally-supported, with > > implementation-defined semantics. In GCC 5 it's supported and treated like > > normal pass-by-value. You can get a diagnostic about it with > > -Wconditionally-supported. > > I tried this today and it does not work with the test case in comment #4. > > pokyo. gcc --version > gcc (GCC) 5.0.0 20150129 (experimental) > Copyright (C) 2015 Free Software Foundation, Inc. > This is free software; see the source for copying conditions. There is NO > warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. > > pokyo. g++ --std=c++11 --syntax-only -Wall -Wconditionally-supported q.cc > pokyo. Are you sure that class is not trivial which is why gcc is not warning about it? C++11 does not really have pod and non-pod any more but rather trivial and non-trivial and the rules has chnaged with respect of constructures.
