Am 25.02.2013 um 16:12 hat Eric Blake geschrieben:
> On 02/24/2013 11:37 PM, Dietmar Maurer wrote:
> > I tried to do that, but it seems that gcc does not support sizeof in
> > preprocessor conditionals,
> > so I added a runtime check in vma_writer_create().
>
> Then you've never written a compile-time assertion, have you :) No
> preprocessor magic is needed.
>
> >
> > Do you have an example how I can add a compile-time assertion that this
> > header is a fixed size?
>
> struct foo { ... };
> struct verify_foo_size {
> char dummy[sizeof(struct foo) == 256 ? 1 : -1];
> };
Don't open-code this. We have QEMU_BUILD_BUG_ON().
Kevin
