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bug#39233: .elc file - possibly outdated backward compatibility comments
From: |
Eli Zaretskii |
Subject: |
bug#39233: .elc file - possibly outdated backward compatibility comments |
Date: |
Fri, 24 Jan 2020 17:23:27 +0200 |
> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: stefan@marxist.se, 39233@debbugs.gnu.org
> Date: Fri, 24 Jan 2020 09:22:49 -0500
>
> > Will these changes still allow old Emacs binaries to load *.elc files
> > compiled by Emacs after these changes?
>
> New Emacsen loading old .elc won't be affected.
>
> Old Emacsen loading .elc files compiled by new Emacsen is something that
> has always been risky, tho it has sometimes worked. My proposal is to
> make it emit a warning (so it will work as much as it does now, but
> will bring to the attention of the user that it's in murky territory).
A warning is a (minor) annoyance. Maybe someone will be annoyed
enough to complain (we shall see), but for the use cases I need this
-- which is running old Emacs binaries to quickly bisect bugs in C
code or in preloaded Lisp -- this doesn't sound like a terrible
problem. As long as this use case works as well (or as badly) as it
did before, modulo the warning.
I feared that this won't work at all, because the *.elc files lack
something which old Emacs binaries will look for at load time.
Thanks.
- bug#39233: .elc file - possibly outdated backward compatibility comments, Stefan Kangas, 2020/01/22
- bug#39233: .elc file - possibly outdated backward compatibility comments, Eli Zaretskii, 2020/01/22
- bug#39233: .elc file - possibly outdated backward compatibility comments, Stefan Monnier, 2020/01/23
- bug#39233: .elc file - possibly outdated backward compatibility comments, Eli Zaretskii, 2020/01/24
- bug#39233: .elc file - possibly outdated backward compatibility comments,
Eli Zaretskii <=
- bug#39233: .elc file - possibly outdated backward compatibility comments, Stefan Monnier, 2020/01/24
- bug#39233: .elc file - possibly outdated backward compatibility comments, Stefan Monnier, 2020/01/24
- bug#39233: .elc file - possibly outdated backward compatibility comments, Stefan Kangas, 2020/01/24
- bug#39233: .elc file - possibly outdated backward compatibility comments, Stefan Monnier, 2020/01/24
- bug#39233: .elc file - possibly outdated backward compatibility comments, Glenn Morris, 2020/01/24
- bug#39233: .elc file - possibly outdated backward compatibility comments, Eli Zaretskii, 2020/01/24