Ubuntu – Difference between emacs and emacs-lucid packages

emacspackage-management

After Ubuntu installation(13.10), I found two versions of Emacs 24 in my software center:

  1. GNU Emacs 24(emacs24)

  2. GNU Emacs 24(emacs24-lucid)

I don't understand what the difference between them is and which version is better to install.
I am going to use emacs with scheme, clisp and other functional languages.
What version preferred for me?

Best Answer

    • emacs without suffix is the GTK+ version of Emacs
    • emacs-nox with the -nox suffix is the emacs version without the X server support.
    • emacs-lucid with the -lucid suffix includes the Emacs with a Lucid user interface.

    Now the question is "What is the Lucid interface?" Certainly the package description isn't helpful in this case. Fortunately I found a bug report that tries to fix that:

    But what is a Lucid user interface? Presumably it means "the user interface offered by emacs23-lucid", which is still unhelpful.

    The changelog.Debian.gz tells me it is "an emacsVER-lucid package for those who still want the non-GTK+ version" --- that is, the UI

    (1) looks like old emacs
    (2) does not use GTK+

    --- which seem like useful data for a person deciding whether to install it.

    The reader is also curious about the relationship, if any, to Lucid, Inc.

    Further reading:

    Lucid, Inc's "Lucid Emacs" was the fork that became XEmacs. So it would seem that emacs23-lucid is the version of GNU Emacs designed to look like nineties versions of XEmacs? See

    http://www.gnu.org/s/libtool/manual/emacs/Lucid-Resources.html#Lucid-Resources

    Installing them and comparing (on Squeeze) I see that emacs23's splash screen says "This is GNU EMacs 23.2.1 (x86_64-pc-linux-gnu, GTK+ Version 2.20.1)" while emacs23-lucid's has "(x86_64-pc-linux-gnu, X toolkit, Xaw3d scroll bars)". It's older and greyer-looking than the GTK+ version, but nowhere near as grey as xemacs21...

    And then what we hopefully will see as the next description (which seems clearer):

    Maybe the description could be something like:

    Description: The GNU Emacs editor (non-GTK+ GUI) GNU Emacs is the extensible self-documenting text editor. This package contains a version of Emacs with a graphical user interface based on the old XEmacs-style Lucid widget set.

    You can know more about this "Lucid" here.