Chris Lattner <sabre@xxxxxxxxxx> writes:
> > How about
> >
> > double D __attribute__((aligned(4), packed));
>
> This is exactly the sort of thing I want to do. My structs can be
> arbitrarily complex, and can have a bunch of stuff in them that should
> not be packed. This means that I don't want to use attribute packed
> on the structure itself, but using it on the member would be fine.
>
> However, when I try this:
>
> struct Test {
> double D __attribute__((packed,aligned(4)));
> short X;
> };
>
> ... the struct maintains its 8-byte alignment even though nothing
> inside of it requires 8-byte alignment any more.
When I try that with a powerpc-eabi compiler, it appears to generates
a struct with a size of 12 bytes and an alignment of 4 bytes. Do you
not see that with a Darwin compiler? What target are you configuring
for? What sources are you using?
Ian
