Missing ‘lexical-binding’ cookie on future Emacs 31.0.50

[xmacex]

Hello. I get the following warning from pre-release Emacs 31.0.50 with this package:

 ■  Warning (files): Missing ‘lexical-binding’ cookie in "~/Library/Application Support/SuperCollider/downloaded-quarks/scel/el/sclang.el".
You can add one with ‘M-x elisp-enable-lexical-binding RET’.
See ‘(elisp)Selecting Lisp Dialect’ and ‘(elisp)Converting to Lexical Binding’
for more information.
 ■  Warning (files): Missing ‘lexical-binding’ cookie in "~/Library/Application Support/SuperCollider/downloaded-quarks/scel/el/sclang-util.el".
You can add one with ‘M-x elisp-enable-lexical-binding RET’.
See ‘(elisp)Selecting Lisp Dialect’ and ‘(elisp)Converting to Lexical Binding’
for more information.
 ■  Warning (files): Missing ‘lexical-binding’ cookie in "~/Library/Application Support/SuperCollider/downloaded-quarks/scel/el/sclang-browser.el".
You can add one with ‘M-x elisp-enable-lexical-binding RET’.
See ‘(elisp)Selecting Lisp Dialect’ and ‘(elisp)Converting to Lexical Binding’
for more information.
 ■  Warning (files): Missing ‘lexical-binding’ cookie in "~/Library/Application Support/SuperCollider/downloaded-quarks/scel/el/sclang-interp.el".
You can add one with ‘M-x elisp-enable-lexical-binding RET’.
See ‘(elisp)Selecting Lisp Dialect’ and ‘(elisp)Converting to Lexical Binding’
for more information.
 ■  Warning (files): Missing ‘lexical-binding’ cookie in "~/Library/Application Support/SuperCollider/downloaded-quarks/scel/el/sclang-language.el".
You can add one with ‘M-x elisp-enable-lexical-binding RET’.
See ‘(elisp)Selecting Lisp Dialect’ and ‘(elisp)Converting to Lexical Binding’
for more information.
 ■  Warning (files): Missing ‘lexical-binding’ cookie in "~/Library/Application Support/SuperCollider/downloaded-quarks/scel/el/sclang-document.el".
You can add one with ‘M-x elisp-enable-lexical-binding RET’.
See ‘(elisp)Selecting Lisp Dialect’ and ‘(elisp)Converting to Lexical Binding’
for more information.
 ■  Warning (files): Missing ‘lexical-binding’ cookie in "~/Library/Application Support/SuperCollider/downloaded-quarks/scel/el/sclang-mode.el".
You can add one with ‘M-x elisp-enable-lexical-binding RET’.
See ‘(elisp)Selecting Lisp Dialect’ and ‘(elisp)Converting to Lexical Binding’
for more information.
 ■  Warning (files): Missing ‘lexical-binding’ cookie in "~/Library/Application Support/SuperCollider/downloaded-quarks/scel/el/sclang-dev.el".
You can add one with ‘M-x elisp-enable-lexical-binding RET’.
See ‘(elisp)Selecting Lisp Dialect’ and ‘(elisp)Converting to Lexical Binding’
for more information.
 ■  Warning (files): Missing ‘lexical-binding’ cookie in "~/Library/Application Support/SuperCollider/downloaded-quarks/scel/el/sclang-minor-mode.el".
You can add one with ‘M-x elisp-enable-lexical-binding RET’.
See ‘(elisp)Selecting Lisp Dialect’ and ‘(elisp)Converting to Lexical Binding’
for more information.
 ■  Warning (files): Missing ‘lexical-binding’ cookie in "~/Library/Application Support/SuperCollider/downloaded-quarks/scel/el/sclang-help.el".
You can add one with ‘M-x elisp-enable-lexical-binding RET’.
See ‘(elisp)Selecting Lisp Dialect’ and ‘(elisp)Converting to Lexical Binding’
for more information.
 ■  Warning (files): Missing ‘lexical-binding’ cookie in "~/Library/Application Support/SuperCollider/downloaded-quarks/scel/el/sclang-server.el".
You can add one with ‘M-x elisp-enable-lexical-binding RET’.
See ‘(elisp)Selecting Lisp Dialect’ and ‘(elisp)Converting to Lexical Binding’
for more information.
 ■  Warning (files): Missing ‘lexical-binding’ cookie in "~/Library/Application Support/SuperCollider/downloaded-quarks/scel/el/sclang-widgets.el".
You can add one with ‘M-x elisp-enable-lexical-binding RET’.
See ‘(elisp)Selecting Lisp Dialect’ and ‘(elisp)Converting to Lexical Binding’
for more information.

I figure adding ;; -*- lexical-binding: t; -*- to the very top of the files will make the warning go away, but I have zero idea whether this breaks stuff.

I have scel 1.0.0 installed using the installation option 1, ie. as a Quark in SuperCollider except instead of adding the path to load-path, I made a symlink on my filesystem. The package itself seems to work just fine, it's just those warnings.

[codecollider]

i'm getting the same errors with GNU Emacs 31.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.41,
cairo version 1.18.0) of 2026-02-19

⛔ Warning (files): Missing ‘lexical-binding’ cookie in "~/.emacs.d/init.el".
You can add one with ‘M-x elisp-enable-lexical-binding RET’.
See ‘(elisp)Selecting Lisp Dialect’ and ‘(elisp)Converting to Lexical Binding’
for more information.
⛔ Warning (files): Missing ‘lexical-binding’ cookie in "~/.local/share/SuperCollider/downloaded-quarks/scel/el/sclang.el".
You can add one with ‘M-x elisp-enable-lexical-binding RET’.
See ‘(elisp)Selecting Lisp Dialect’ and ‘(elisp)Converting to Lexical Binding’
for more information.
⛔ Warning (files): Missing ‘lexical-binding’ cookie in "~/.local/share/SuperCollider/downloaded-quarks/scel/el/sclang-util.el".
You can add one with ‘M-x elisp-enable-lexical-binding RET’.
See ‘(elisp)Selecting Lisp Dialect’ and ‘(elisp)Converting to Lexical Binding’
for more information.
⛔ Warning (files): Missing ‘lexical-binding’ cookie in "~/.local/share/SuperCollider/downloaded-quarks/scel/el/sclang-browser.el".
You can add one with ‘M-x elisp-enable-lexical-binding RET’.
See ‘(elisp)Selecting Lisp Dialect’ and ‘(elisp)Converting to Lexical Binding’
for more information.
⛔ Warning (files): Missing ‘lexical-binding’ cookie in "~/.local/share/SuperCollider/downloaded-quarks/scel/el/sclang-interp.el".
You can add one with ‘M-x elisp-enable-lexical-binding RET’.
See ‘(elisp)Selecting Lisp Dialect’ and ‘(elisp)Converting to Lexical Binding’
for more information.
⛔ Warning (files): Missing ‘lexical-binding’ cookie in "~/.local/share/SuperCollider/downloaded-quarks/scel/el/sclang-language.el".
You can add one with ‘M-x elisp-enable-lexical-binding RET’.
See ‘(elisp)Selecting Lisp Dialect’ and ‘(elisp)Converting to Lexical Binding’
for more information.
⛔ Warning (files): Missing ‘lexical-binding’ cookie in "~/.local/share/SuperCollider/downloaded-quarks/scel/el/sclang-document.el".
You can add one with ‘M-x elisp-enable-lexical-binding RET’.
See ‘(elisp)Selecting Lisp Dialect’ and ‘(elisp)Converting to Lexical Binding’
for more information.
⛔ Warning (files): Missing ‘lexical-binding’ cookie in "~/.local/share/SuperCollider/downloaded-quarks/scel/el/sclang-mode.el".
You can add one with ‘M-x elisp-enable-lexical-binding RET’.
See ‘(elisp)Selecting Lisp Dialect’ and ‘(elisp)Converting to Lexical Binding’
for more information.
⛔ Warning (files): Missing ‘lexical-binding’ cookie in "~/.local/share/SuperCollider/downloaded-quarks/scel/el/sclang-dev.el".
You can add one with ‘M-x elisp-enable-lexical-binding RET’.
See ‘(elisp)Selecting Lisp Dialect’ and ‘(elisp)Converting to Lexical Binding’
for more information.
⛔ Warning (files): Missing ‘lexical-binding’ cookie in "~/.local/share/SuperCollider/downloaded-quarks/scel/el/sclang-minor-mode.el".
You can add one with ‘M-x elisp-enable-lexical-binding RET’.
See ‘(elisp)Selecting Lisp Dialect’ and ‘(elisp)Converting to Lexical Binding’
for more information.
⛔ Warning (files): Missing ‘lexical-binding’ cookie in "~/.local/share/SuperCollider/downloaded-quarks/scel/el/sclang-help.el".
You can add one with ‘M-x elisp-enable-lexical-binding RET’.
See ‘(elisp)Selecting Lisp Dialect’ and ‘(elisp)Converting to Lexical Binding’
for more information.
⛔ Warning (files): Missing ‘lexical-binding’ cookie in "~/.local/share/SuperCollider/downloaded-quarks/scel/el/sclang-server.el".
You can add one with ‘M-x elisp-enable-lexical-binding RET’.
See ‘(elisp)Selecting Lisp Dialect’ and ‘(elisp)Converting to Lexical Binding’
for more information.
⛔ Warning (files): Missing ‘lexical-binding’ cookie in "~/.local/share/SuperCollider/downloaded-quarks/scel/el/sclang-widgets.el".
You can add one with ‘M-x elisp-enable-lexical-binding RET’.
See ‘(elisp)Selecting Lisp Dialect’ and ‘(elisp)Converting to Lexical Binding’
for more information.