Re: MPS: nativecomp ABI

[Pip Cet <pipcet@protonmail.com>]

On Saturday, July 6th, 2024 at 17:53, Andrea Corallo <acorallo@gnu.org> wrote:
> Pip Cet pipcet@protonmail.com writes:
> > I'm working on scratch/igc. One thing I'd like to do is put the IGC header which all objects will require (for now) into these structs:
> >
> > struct Lisp_Cons
> > struct Lisp_Symbol
> > struct Lisp_String
> > struct Lisp_Float
> > union vectorlike_header
> >
> > IIUC, this means changing the nativecomp ABI hash (which means I'll
> > have to rebuild the .eln files, I think) and adjusting any nativecomp
> > code which knows about the structure layouts. However, I've only been
> > able to find that for Lisp_Cons and struct Lisp_Symbol_With_Pos, which
> > declares its header as ptrdiff_t. Are there more, or do the others all
> > use C functions for access?
> >
> > Things appear to work, but I'd rather not miss anything and haven't looked at this code in years.
> >
> > Thanks!
> > Pip

> I believe the easiest is that you compile a .eln with
> native-comp-debug >= 2 and have a look to the generated pseudo C.
>

> Indipendently to the code being compiled, on top you'll see all the
> structures defined to libgccjit.

Thanks for the advice. That worked for me, though I must confess I was looking in the wrong place for the pseudo-C code.

Pip