If you don't use no-littering, or don't otherwise have a place to keep your
transient Emacs files, remove the "var" from the suggested path.

In early-init.el:

  ;; with a var transient dir
  (startup-redirect-eln-cache
   (expand-file-name (concat (file-name-as-directory "eln-cache")
                             (car (split-string system-configuration "-")))
                     (expand-file-name "var" user-emacs-directory)))
  ;; without
  (startup-redirect-eln-cache
   (expand-file-name (concat (file-name-as-directory "eln-cache")
                             (car (split-string system-configuration "-")))
                     user-emacs-directory))

On Wed, Feb 26, 2025 at 9:19 AM Ship Mints <shipmints@gmail.com> wrote:

> If you want to share the identical .emacs tree across architectures, the
> solution I suggested will work fine.  Try it and see.
>
> On Wed, Feb 26, 2025 at 9:16 AM Rahul Juliato <rahuljuliato@gmail.com>
> wrote:
>
>> I totally forgot to see this later. Thanks for pointing it Ship Mints, my
>> bad!
>>
>> I am curious if I could simply drop any `eln-cache` hacks from my user
>> config and rely solely on the new internals
>> (in my case:   ~/emacs/.emacs.d/eln-cache/30.1-a9997e26).
>>
>>
>> Em qua., 26 de fev. de 2025 às 11:08, Ship Mints <shipmints@gmail.com>
>> escreveu:
>>
>>> It should be sufficient to differentiate by architecture, not by host.
>>> 'comp-native-version-dir' is used internally by Emacs and I don't think you
>>> need to reference it.
>>>
>>> I think you asked this on reddit and seemed satisfied with this response
>>> https://www.reddit.com/r/emacs/comments/1hgjra6/comment/m3i486t/ which
>>> seems to suffice for your use case.
>>>
>>> -Stephane
>>>
>>> On Wed, Feb 26, 2025 at 8:57 AM Rahul Martim Juliato <
>>> rahuljuliato@gmail.com> wrote:
>>>
>>>>
>>>> This is not a bug, more of a question.
>>>>
>>>> I noticed the addition of `comp-native-version-dir' and found it nice
>>>> to be there.
>>>>
>>>> I currently have a workflow where I use the same (but not at the same
>>>> time) emacs config from a network folder for both macos (arm
>>>> architecture) and debian (x64).
>>>>
>>>> In my config I manually set the name of the folders `eln-cache` to be
>>>> something like `eln-cache-machine1` and `eln-cache-machine2`.
>>>>
>>>> Since 30.1 became released, the `comp-native-version-dir' is added to
>>>> organize the subfolder.
>>>>
>>>> Does it create this magic number taking in consideration also the
>>>> machine architecture? If not, could we make
>>>> distinctions between architectures when creating the sub-folders?
>>>>
>>>> If I use the same pre-compiled binaries, will this number be the same on
>>>> both machines?
>>>>
>>>> I tried to collect some of this info on #emacs@Libera.Chat, confusion
>>>> was everywhere, we couldn't conclude anything. Could Emacs maintainers
>>>> provide us with a little bit more info or where to find it?
>>>>
>>>> Thanks!
>>>>
>>>>
>>>>
>>>>
>>>> In GNU Emacs 30.1 (build 2, x86_64-pc-linux-gnu, GTK+ Version 3.24.38,
>>>>  cairo version 1.16.0) of 2025-02-24 built on debian
>>>> System Description: Debian GNU/Linux 12 (bookworm)
>>>>
>>>> Configured using:
>>>>  'configure --with-native-compilation=aot --with-tree-sitter --with-gif
>>>>  --with-png --with-jpeg --with-rsvg --with-tiff --with-imagemagick
>>>>  --with-pgtk --with-mailutils'
>>>>
>>>> Configured features:
>>>> ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM GSETTINGS HARFBUZZ
>>>> IMAGEMAGICK JPEG LCMS2 LIBOTF LIBSELINUX LIBSYSTEMD LIBXML2 MODULES
>>>> NATIVE_COMP NOTIFY INOTIFY PDUMPER PGTK PNG RSVG SECCOMP SOUND SQLITE3
>>>> THREADS TIFF TOOLKIT_SCROLL_BARS TREE_SITTER WEBP XIM GTK3 ZLIB
>>>>
>>>> Important settings:
>>>>   value of $LANG: en_US.UTF-8
>>>>   locale-coding-system: utf-8-unix
>>>>
>>>> Major mode: Dashboard
>>>>
>>>> Minor modes in effect:
>>>>   emms-mode-line-mode: t
>>>>   emms-playing-time-display-mode: t
>>>>   emms-playing-time-mode: t
>>>>   diff-hl-margin-mode: t
>>>>   diff-hl-flydiff-mode: t
>>>>   global-diff-hl-mode: t
>>>>   treemacs-project-follow-mode: t
>>>>   treemacs-filewatch-mode: t
>>>>   treemacs-follow-mode: t
>>>>   treemacs-git-mode: t
>>>>   treemacs-fringe-indicator-mode: t
>>>>   recentf-mode: t
>>>>   which-key-mode: t
>>>>   global-treesit-auto-mode: t
>>>>   vertico-mode: t
>>>>   global-evil-collection-unimpaired-mode: t
>>>>   evil-collection-unimpaired-mode: t
>>>>   global-evil-matchit-mode: t
>>>>   evil-matchit-mode: t
>>>>   global-evil-surround-mode: t
>>>>   evil-surround-mode: t
>>>>   evil-mode: t
>>>>   evil-local-mode: t
>>>>   pulsar-global-mode: t
>>>>   pulsar-mode: t
>>>>   global-undo-tree-mode: t
>>>>   undo-tree-mode: t
>>>>   async-bytecomp-package-mode: t
>>>>   persp-mode-project-bridge-mode: t
>>>>   persp-mode: t
>>>>   global-ligature-mode: t
>>>>   ligature-mode: t
>>>>   nerd-icons-completion-mode: t
>>>>   marginalia-mode: t
>>>>   corfu-popupinfo-mode: t
>>>>   global-corfu-mode: t
>>>>   corfu-mode: t
>>>>   override-global-mode: t
>>>>   xterm-mouse-mode: t
>>>>   winner-mode: t
>>>>   savehist-mode: t
>>>>   save-place-mode: t
>>>>   pixel-scroll-precision-mode: t
>>>>   global-auto-revert-mode: t
>>>>   delete-selection-mode: t
>>>>   global-eldoc-mode: t
>>>>   show-paren-mode: t
>>>>   electric-indent-mode: t
>>>>   mouse-wheel-mode: t
>>>>   file-name-shadow-mode: t
>>>>   global-font-lock-mode: t
>>>>   font-lock-mode: t
>>>>   minibuffer-regexp-mode: t
>>>>   buffer-read-only: t
>>>>   column-number-mode: t
>>>>   line-number-mode: t
>>>>   transient-mark-mode: t
>>>>   auto-composition-mode: t
>>>>   auto-encryption-mode: t
>>>>   auto-compression-mode: t
>>>>
>>>> Load-path shadows:
>>>> /home/rmj/.emacs.d/elpa/transient-20250222.1912/transient hides
>>>> /usr/local/share/emacs/30.1/lisp/transient
>>>> /home/rmj/.emacs.d/elpa/modus-themes-20250220.647/theme-loaddefs hides
>>>> /usr/local/share/emacs/30.1/lisp/theme-loaddefs
>>>>
>>>> Features:
>>>> (shadow mail-extr emacsbug help-fns radix-tree evil-collection-emms
>>>> emms-idapi-browser emms-idapi emms-idapi-musicbrainz emms-mpris dbus
>>>> emms-librefm-stream xml emms-librefm-scrobbler emms-playlist-limit
>>>> emms-i18n emms-history emms-score emms-stream-info
>>>> emms-metaplaylist-mode emms-bookmarks emms-cue emms-mode-line-icon
>>>> emms-browser sort emms-volume emms-volume-sndioctl emms-volume-mixerctl
>>>> emms-volume-pulse emms-volume-amixer emms-playlist-sort emms-last-played
>>>> emms-player-xine emms-player-mpd tq emms-lyrics emms-url emms-streams
>>>> emms-show-all emms-tag-editor format-spec emms-tag-tracktag emms-mark
>>>> emms-mode-line emms-cache emms-info-native emms-info-native-spc
>>>> emms-info-native-mp3 emms-info-native-ogg emms-info-native-opus
>>>> emms-info-native-flac emms-info-native-vorbis bindat emms-info-exiftool
>>>> emms-info-tinytag emms-info-metaflac emms-info-opusinfo
>>>> emms-info-ogginfo emms-info-mp3info emms-playlist-mode emms-player-vlc
>>>> emms-player-mpv emms-playing-time emms-info emms-later-do
>>>> emms-player-mplayer emms-player-simple emms-source-playlist
>>>> emms-source-file locate emms-setup emms emms-compat
>>>> evil-collection-wgrep wgrep evil-collection-diff-hl diff-hl-margin
>>>> diff-hl-dired diff-hl-flydiff diff-hl evil-collection-log-view log-view
>>>> evil-collection-vc-dir vc-dir ewoc evil-collection-log-edit log-edit
>>>> message sendmail yank-media puny evil-collection-dired nerd-icons-dired
>>>> dired dired-loaddefs rfc822 mml mml-sec evil-collection-epa epa derived
>>>> epg rfc6068 epg-config gnus-util time-date mm-decode mm-bodies mm-encode
>>>> mail-parse rfc2231 rfc2047 rfc2045 mm-util ietf-drums mail-prsvr
>>>> mailabbrev mail-utils gmm-utils mailheader pcvs-util add-log vc
>>>> vc-dispatcher evil-collection-diff-mode diff-mode track-changes
>>>> orderless cursor-sensor treemacs-nerd-icons treemacs-evil
>>>> treemacs-project-follow-mode treemacs treemacs-header-line
>>>> treemacs-compatibility treemacs-mode treemacs-interface
>>>> treemacs-persistence treemacs-filewatch-mode treemacs-follow-mode
>>>> treemacs-rendering treemacs-annotations treemacs-async
>>>> treemacs-workspaces treemacs-dom treemacs-visuals
>>>> treemacs-fringe-indicator treemacs-faces treemacs-icons treemacs-scope
>>>> treemacs-themes treemacs-core-utils pfuture inline hl-line ht
>>>> treemacs-logging treemacs-customization treemacs-macros s dash
>>>> evil-collection-dashboard dashboard dashboard-widgets mule-util ffap
>>>> private recentf tree-widget evil-collection-which-key which-key
>>>> treesit-auto treesit evil-collection-vertico vertico
>>>> evil-collection-unimpaired evil-collection-tabulated-list
>>>> evil-collection-tab-bar evil-collection-so-long evil-collection-simple
>>>> evil-collection-replace evil-collection-process-menu
>>>> evil-collection-package-menu evil-collection-minibuffer
>>>> evil-collection-kmacro evil-collection-info evil-collection-indent
>>>> evil-collection-ibuffer evil-collection-help evil-collection-grep
>>>> evil-collection-elisp-mode evil-collection-eldoc evil-collection-custom
>>>> evil-collection-corfu evil-collection-compile evil-collection-comint
>>>> evil-collection-buff-menu evil-matchit evil-matchit-evil-setup
>>>> evil-matchit-sdk semantic/lex semantic/fw mode-local find-func
>>>> evil-surround evil-collection annalist evil evil-integration evil-maps
>>>> evil-commands reveal evil-jumps evil-command-window evil-types
>>>> evil-search evil-ex evil-macros evil-repeat evil-states evil-core
>>>> evil-common thingatpt rect evil-vars edmacro kmacro pulsar pulse color
>>>> undo-tree diff queue async-bytecomp async persp-mode-project-bridge
>>>> persp-mode ligature lemacs-init nerd-icons-ibuffer nerd-icons-completion
>>>> nerd-icons nerd-icons-faces nerd-icons-data nerd-icons-data-mdicon
>>>> nerd-icons-data-flicon nerd-icons-data-codicon nerd-icons-data-devicon
>>>> nerd-icons-data-sucicon nerd-icons-data-wicon nerd-icons-data-faicon
>>>> nerd-icons-data-powerline nerd-icons-data-octicon
>>>> nerd-icons-data-pomicon nerd-icons-data-ipsicon ibuffer-project project
>>>> ibuf-ext ibuffer ibuffer-loaddefs comp comp-cstr cl-extra help-mode
>>>> warnings comp-run comp-common rx flymake-eslint marginalia
>>>> corfu-popupinfo corfu cape compat server pinentry
>>>> modus-vivendi-tinted-theme modus-themes cus-edit pp wid-edit time
>>>> auth-source-pass bind-key xt-mouse winner savehist saveplace
>>>> pixel-scroll cua-base autorevert filenotify desktop frameset so-long
>>>> delsel grep compile text-property-search comint ansi-osc ansi-color ring
>>>> cus-load 0x0-autoloads add-node-modules-path-autoloads
>>>> apheleia-autoloads easy-mmode breadcrumb-autoloads cape-autoloads
>>>> catppuccin-theme-autoloads colorful-mode-autoloads corfu-autoloads
>>>> dashboard-autoloads diff-hl-autoloads dired-subtree-autoloads
>>>> dired-hacks-utils-autoloads diredfl-autoloads docker-autoloads
>>>> dockerfile-mode-autoloads doom-modeline-autoloads dotenv-mode-autoloads
>>>> eat-autoloads eldoc-box-autoloads elfeed-tube-mpv-autoloads
>>>> elfeed-tube-autoloads aio-autoloads elfeed-autoloads ellama-autoloads
>>>> embark-consult-autoloads consult-autoloads embark-autoloads
>>>> emms-autoloads erc-hl-nicks-autoloads
>>>> eshell-syntax-highlighting-autoloads eshell-z-autoloads
>>>> evil-collection-autoloads annalist-autoloads evil-matchit-autoloads
>>>> evil-surround-autoloads exec-path-from-shell-autoloads
>>>> expand-region-autoloads flymake-eslint-autoloads forge-autoloads
>>>> closql-autoloads emacsql-autoloads geiser-guile-autoloads
>>>> geiser-autoloads gh-md-autoloads ghub-autoloads
>>>> git-timemachine-autoloads handlebars-mode-autoloads hl-todo-autoloads
>>>> ibuffer-project-autoloads indent-guide-autoloads js-pkg-mode-autoloads
>>>> khalel-autoloads kkp-autoloads ligature-autoloads llm-autoloads
>>>> lsp-tailwindcss-autoloads lsp-mode-autoloads magit-stats-autoloads
>>>> marginalia-autoloads markdown-mode-autoloads modus-themes-autoloads
>>>> mpv-autoloads nerd-icons-completion-autoloads nerd-icons-corfu-autoloads
>>>> nerd-icons-dired-autoloads nerd-icons-ibuffer-autoloads
>>>> olivetti-autoloads orderless-autoloads org-modern-autoloads
>>>> org-ros-autoloads package-lint-autoloads
>>>> persp-mode-project-bridge-autoloads persp-mode-autoloads
>>>> pinentry-autoloads plz-event-source-autoloads plz-media-type-autoloads
>>>> plz-autoloads polymode-autoloads proced-narrow-autoloads
>>>> pulsar-autoloads pyvenv-autoloads rainbow-delimiters-autoloads
>>>> ready-player-autoloads sass-mode-autoloads haml-mode-autoloads
>>>> scss-mode-autoloads shrink-path-autoloads f-autoloads sly-autoloads
>>>> smartparens-autoloads spinner-autoloads sudo-edit-autoloads
>>>> tablist-autoloads tempel-collection-autoloads tempel-autoloads
>>>> transmission-autoloads transpose-frame-autoloads treemacs-evil-autoloads
>>>> evil-autoloads goto-chg-autoloads treemacs-icons-dired-autoloads
>>>> treemacs-magit-autoloads magit-autoloads pcase transient-autoloads
>>>> magit-section-autoloads llama-autoloads treemacs-nerd-icons-autoloads
>>>> treemacs-autoloads cfrs-autoloads posframe-autoloads ht-autoloads
>>>> hydra-autoloads lv-autoloads pfuture-autoloads ace-window-autoloads
>>>> avy-autoloads s-autoloads dash-autoloads nerd-icons-autoloads
>>>> treepy-autoloads treesit-auto-autoloads typescript-mode-autoloads
>>>> undo-tree-autoloads queue-autoloads vc-msg-autoloads popup-autoloads
>>>> vdirel-autoloads helm-autoloads helm-core-autoloads async-autoloads
>>>> org-vcard-autoloads verb-autoloads vertico-autoloads web-mode-autoloads
>>>> wfnames-autoloads wgrep-autoloads info with-editor-autoloads
>>>> xclip-autoloads xterm-color-autoloads yaml-autoloads yaml-mode-autoloads
>>>> yeetube-autoloads package browse-url url url-proxy url-privacy
>>>> url-expand url-methods url-history url-cookie generate-lisp-file
>>>> url-domsuf url-util mailcap url-handlers url-parse auth-source cl-seq
>>>> eieio eieio-core cl-macs icons password-cache json subr-x map byte-opt
>>>> gv bytecomp byte-compile url-vars cl-loaddefs cl-lib early-init rmc
>>>> iso-transl tooltip cconv eldoc paren electric uniquify ediff-hook
>>>> vc-hooks lisp-float-type elisp-mode mwheel term/pgtk-win pgtk-win
>>>> term/common-win touch-screen pgtk-dnd tool-bar dnd fontset image
>>>> regexp-opt fringe tabulated-list replace newcomment text-mode lisp-mode
>>>> prog-mode register page tab-bar menu-bar rfn-eshadow isearch easymenu
>>>> timer select scroll-bar mouse jit-lock font-lock syntax font-core
>>>> term/tty-colors frame minibuffer nadvice seq simple cl-generic
>>>> indonesian philippine cham georgian utf-8-lang misc-lang vietnamese
>>>> tibetan thai tai-viet lao korean japanese eucjp-ms cp51932 hebrew greek
>>>> romanian slovak czech european ethiopic indian cyrillic chinese
>>>> composite emoji-zwj charscript charprop case-table epa-hook
>>>> jka-cmpr-hook help abbrev obarray oclosure cl-preloaded button loaddefs
>>>> theme-loaddefs faces cus-face macroexp files window text-properties
>>>> overlay sha1 md5 base64 format env code-pages mule custom widget keymap
>>>> hashtable-print-readable backquote threads dbusbind inotify
>>>> dynamic-setting system-font-setting font-render-setting cairo gtk pgtk
>>>> lcms2 multi-tty move-toolbar make-network-process native-compile emacs)
>>>>
>>>> Memory information:
>>>> ((conses 16 748467 190575) (symbols 48 29921 19)
>>>>  (strings 32 214960 6008) (string-bytes 1 8549689) (vectors 16 52457)
>>>>  (vector-slots 8 1316547 238197) (floats 8 1275 55)
>>>>  (intervals 56 4166 738) (buffers 992 14))
>>>>
>>>>
>>>>
>>>>