[Bug c++/64867] warning for passing non-POD to varargs function

[tromey at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64867

--- Comment #5 from Tom Tromey <tromey at gcc dot gnu.org> ---
(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.