On Mon, 19 Aug 2019, Richard Earnshaw (lists) wrote: > Correct, but note that you can only pack structs and unions, not basic types. > there is no way of under-aligning a basic type except by wrapping it in a > struct.
I don't think that's true. In GCC-9 the doc for 'aligned' attribute has been significantly revised, and now ends with When used as part of a typedef, the aligned attribute can both increase and decrease alignment, and specifying the packed attribute generates a warning. (but I'm sure defacto behavior of accepting and honoring reduced alignment on a typedef'ed scalar type goes way earlier than gcc-9) Alexander
