Re: Building the igc branch on MS-Windows

[Eli Zaretskii <eliz@gnu.org>]

> From: Gerd Möllmann <gerd.moellmann@gmail.com>
> Cc: eller.helmut@gmail.com,  emacs-devel@gnu.org
> Date: Thu, 25 Apr 2024 13:55:53 +0200
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > Could be some alignment problem?  MPS seems to use alignment of 4 on
> > 32-bit platforms, but AFAIR Emacs wants alignment of 8 for Lisp
> > objects?
> 
> The alignment of MPS objects is specified around line 2761 in igc.c

(FTR: it's line 2908 now.)

> 
>     MPS_ARGS_ADD (args, MPS_KEY_FMT_ALIGN, IGC_ALIGN);
> 
> IGC_ALIGN == GCALIGNMENT at present, which is 8 for me (USE_LSB_TAG).

It's 8 for me as well, since that's Emacs's requirement since about
forever.  But you are on a 64-bit platform, where MPS uses alignment
of 8, whereas I'm on 32-bit, where MPS uses alignment of 4.  Can this
be a problem for some reason?

> > Backtrace #1:
> > Backtrace #2:
> 
> No idea at the moment, but we should make sure to trace everything
> reachable in a GUI frames first. Before that's done, it's basically
> guaranteed to crash at soem point.

Ah, okay.  I wasn't aware that such basics are not yet covered.  So,
with the display stuff out of scope, what else is worth testing in
this build?  Byte compilation works, as is shown by building the
entire tree.  Tree-sitter support needs finalizers to be ... ahm
... finalized first.  What else is there that is supposed to work with
the current source?