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From: Eli Zaretskii <eliz@gnu.org>
Newsgroups: gmane.emacs.devel
Subject: Re: Proposal: Forwards-Compatibility Library for Emacs
Date: Tue, 21 Sep 2021 16:12:24 +0300
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Cc: joaotavora@gmail.com, monnier@iro.umontreal.ca, emacs-devel@gnu.org
To: Philip Kaludercic <philipk@posteo.net>
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> From: Philip Kaludercic <philipk@posteo.net>
> Date: Tue, 21 Sep 2021 13:00:16 +0000
> Cc: emacs-devel@gnu.org, Stefan Monnier <monnier@iro.umontreal.ca>,
>  João Távora <joaotavora@gmail.com>
> 
> > Can symbol-renaming help here, perhaps?  I believe João is trying to
> > get it ready in time for Emacs 28.
> 
> Going by my proposal, the library does nothing when loaded in Emacs
> 28.1, because it is already compatible to itself. No need for an extra
> layer. It is only of interest to older versions, and they won't be able
> to make use of symbol-renaming.

Why it is a problem for older versions to load symbol-renaming as
well?