On 15 April 2010 18:24, Martin Olsson <martin@xxxxxxxxxx> wrote: > > 1. Why is this a "warning" rather than an "error"? When I run the program > it hits a "ud2a" instruction emitted by gcc and promptly hits SIGILL. See the discussion in http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19291 Basically, the C++ standard seems to say that this cannot be a hard-error. > 2. Is there a command line switch that I can use to make GCC treat this > particular warning as an error? That is the reason the PR is still open. I will try to get it for GCC 4.6. > 3. If I make A::a member public rather than private then A gets classified > as a POD and the warning goes away. I find this a bit strange, because I > always thought that "private" versus "public" was a "compile time concept" > that has no impact on the emitted binary? Weird. I do not know what is going on there. Cheers, Manuel.
