>> This is the message when installing auctex-14.0.9.tar
>> Auctex-pkg.el:0:0: error: void-function: (lisp-data-mode)
>
> This issue is more interesting. auctex-pkg.el from auctex-14.0.9.tar
> contains (line breaks added for legibility):
>
> --8<---------------cut here---------------start------------->8---
> ;; Generated package description from auctex.el -*- mode: lisp-data;
> no-byte-compile: t -*-
> (define-package "auctex"
> "14.0.9" "Integrated environment for *TeX*"
> '((emacs "27.1"))
> :commit "ee58d625501af073bde569718db02d1236162283"
> --8<---------------cut here---------------end--------------->8---
>
> AUCTeX requires Emacs 27.1, but the package seems to be generated with
> Emacs 28, since `lisp-data-mode' was introduced with that version[2].
> Hence, the installation of the tarball doesn't work on Emacs<28 with:
>
> M-x package-install-file RET auctex-14.0.9.tar RET
>
> @Stefan: Can you help us out with this issue?
14.0.9 was released in Feb 2025, and this problem was (supposedly) fixed
by:
commit e25d268067c3464c2dccfd090b2a95e0d0d7567d
Author: Stefan Monnier <monn...@iro.umontreal.ca>
Date: Wed Mar 19 18:01:50 2025 -0400
elpa-admin.el: Remove `:main-file` and use `lisp-data-mode` less
* elpa-admin.el (elpaa--main-file): Don't pay attention to `:main-file`.
(elpaa--supported-keywords): Remove `:main-file`.
(elpaa--write-pkg-file): Use `lisp-data-mode` only for packages
destined for Emacs≥28.
So, AFAIK, the problem would have been fixed in the AUCTeX-14.1.0
package which was released in July, except that this one changed its
dependency to Emacs-28 anyway.
In the mean time, I recommend adding
(unless (fboundp 'lisp-data-mode)
(defalias 'lisp-data-mode 'emacs-lisp-mode))
to your init file to work around such problems. 🙁
Stefan
