Re: Question about code generation

[Eli Zaretskii <eliz@gnu.org>]

> From: Helmut Eller <eller.helmut@gmail.com>
> Cc: Eli Zaretskii <eliz@gnu.org>,  emacs-devel@gnu.org
> Date: Fri, 10 May 2024 14:57:17 +0200
> 
> On Fri, May 10 2024, Gerd Möllmann wrote:
> 
> >> But I guess I'm misunderstanding what you are asking about.
> >
> > I was thinking of (making my life easier and) generating the fix_
> > functions in igc.c, as an example, from knowledge that a C parser has
> > which members are in a given struct, what's their type, Lisp_Object,
> > pointer to something interesting, ...
> >
> > Together with meta infos passed to a code generator this could be used
> > for all sorts of things, I guess.
> 
> Would be nice to write things like:
> 
> struct foo {
>    void* bar [[emacs::igc_fix_obj]];
> }
> 
> and then run a gcc or clang plugin over it and generate the needed code.
> 
> Can libgccjit be used to parse C code and could we write the plugin in
> Emacs Lisp?  That would be fun.

AFAIU, libgccjit needs GIMPL, and you drive it by calling the
respective functions from libgccjit.  But Andrea will tell for sure.