Questions tagged [version-compatibilty]

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Error initiating treemac

initiating treemac is giving this error. I just don't understand all the errors that emacs throws up. I just have (require 'treemacs) in init file. version-to-list: Invalid version syntax: ‘'"'...
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2answers
91 views

What happens if I have different versions of Emacs using the same directory

Currently I have two versions of Emacs (system installed by apt-get: emacs26 and my own compiled version emacs27). They both us emacs.d directory, and I wonder what happens the packages are ...
4
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0answers
35 views

A workflow for managing compiled elisp packages with different versions of emacs

I am using different versions of emacs, on different computers. On some of those (work computers) I don't really have a choice to update, whereas for my personal computers, I like to run the latest ...
5
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2answers
90 views

(ucs-names) in Emacs 26 is not working for “EURO SIGN”

I have in my .emacs: (when (>= emacs-major-version 23) (define-key global-map "\C-x8g" (lambda nil (interactive) (ucs-insert `,(cdr (assoc-string "HRYVNIA SIGN" (ucs-names) t))))) (define-key ...
2
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1answer
188 views

How to detect Emacs Mac Port in Elisp?

I recently explored the Emacs Mac Port developed by Yamamoto Mitsuharu. It feels great and I would like to try using it instead of vanilla GNU Emacs. However, I have some code in my init files which ...
3
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1answer
809 views

How to test for specific Emacs version or newer?

Emacs 24.4 made an incompatible change to interpreter-mode-alist, treating its members now as regular expressions and no longer as simple strings (http://git.savannah.gnu.org/cgit/emacs.git/commit/?id=...
1
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1answer
293 views

How to install sage-shell-mode with Emacs 25.1?

I would like to install sage-shell-mode. Now I read the README, and it indicated that with MELPA added to my package archive list I should be able to install sage-shell-mode with (after pressing M+x, ...
2
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1answer
113 views

Can't parse the output of manpages in pcmpl-args.el in Emacs 25.1.1

This is a followup to this question, as I originally was uncertain as to how to make this question into a suitable format for this site. So, I'm a user of pcmpl-args.el, which is an Emacs package that ...
1
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1answer
81 views

A way to change Emacs versions at runtime (or some other way to fix an outdated package)

I've recently upgraded to Emacs 25.1.1 and have found that it's, understandably, broken a very useful package to me: pcmpl-args.el. I say "understandably" because the package hasn't been developed ...
4
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2answers
208 views

How can I find which version of a particular mode I am using?

For example, I want to use a library that requires I am on org-mode version 8 or above. I don't know what version of org-mode I have. Running M-x version only gives me the emacs version. Is there a ...
8
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1answer
619 views

How do I run multiple versions of Emacs with the same .emacs.d

I alternatively run 24.5 and 25.0.50. Unfortunately, packages installed and compiled from 25.0.50 don't work with Emacs 24.5 (cl-struct-define is a common culprit). One trivial solution is to not ...
13
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1answer
698 views

How to run multiple versions of emacs for package development?

Is there a set of tools to enable testing a package on multiple Emacs versions. For example 24.4 is almost released. Can I install it and still safely test my package in 24.1? How would I deal with a ...
8
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3answers
995 views

Writing portable Elisp

Ideally, I would like to be able to store the entire contents of my .emacs.d directory and have it "just work" on any Emacs I load it into, but still take advantage of any features of the specific ...
10
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4answers
338 views

How do I inherit from prog-mode, whilst still supporting older emacsen?

I'm writing a major mode for a programming language, but I want to support older Emacs versions. prog-mode is relatively new. I want to inherit from prog-mode if it's defined, but still do something ...