https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116457
--- Comment #11 from Arsen Arsenović <arsen at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #9)
> (In reply to Arsen Arsenović from comment #8)
> > > what happens if you have 2 structs marked as randomize_layout but the
> > > order
> > > of the definition is different between 2 TUs? Then this breaks unless you
> > > only have them not going outside the TU.
>
> This part was never answered on the semantics here?
> And the clang documentation for
> frandomize-layout-seed/frandomize-layout-seed-file is weak.
>
> Say you have (assuming all three have the randomize attribute on it)
>
> header1:
> ```
> struct a
> {
> ...
> };
> ```
>
> header2:
> ```
> struct b
> {
> ...
> };
> ```
>
>
> You include header1 before header2 in TU1 but in TU2 the opposite is true.
>
> Or say you sometimes include header3 which contains `struct c{...};`
> how do you set the seed for each struct?
you don't - they all start from the same seed amended by the hash of the
structure name or something; see
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/scripts/gcc-plugins/randomize_layout_plugin.c
in any case - it is stable
