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Trying here to set a file with VC RCS, but I'm having some trouble finding the .el file and enable it.

Already managed to download rcs.el from this link, but it isn't being recognized in Emacs.

Already copied it into ~/.emacs.d/lisp/ and added following info in .emacs file:

(add-to-list 'load-path "~/.emacs.d/lisp/")
(load "rcs")

It just returns me the error message Searching for program: No such file or directory, rcs, despite having tried to enable it via Ctrl + x v v command.

  • It sounds like you need to install rcs the command line program, not the Emacs package. – npostavs Aug 4 '19 at 2:08
  • Looks like that it was really this, thanks! – Vasconcelos1914 Aug 4 '19 at 12:21
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the error message Searching for program: No such file or directory, rcs,

This means Emacs can't find the executable called rcs. You need to install it through your OS package manager, or build it from source: https://www.gnu.org/software/rcs/rcs.html

You don't need the rcs.el package, as Emacs' builtin vc-rcs will already handle it.

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  • I'm just using it now! Would you know how could I revert to a previous not immediately version of the file? For example, I'm writing on version 1.7 and want to revert do version 1.2 instead of 1.6. – Vasconcelos1914 Aug 4 '19 at 18:54
  • @Vasconcelos1914 I've never used rcs myself, but maybe C-x v u (vc-revert) would help? – npostavs Aug 4 '19 at 20:14
  • This commands reverts to the immediately previous version, I'd like to revert to some further previous, like from 1.8 to 1.5, instead of only 1.8 to 1.7! – Vasconcelos1914 Aug 4 '19 at 22:18
  • Just managed on how to do it! One should C - x v g (vc-annotate), move to previous or next revision entry with p or n, and then f to visit the desired version! – Vasconcelos1914 Aug 4 '19 at 22:57
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As an aside, if you are going to use RCS, I would highly recommend src: http://www.catb.org/~esr/src/ It does everything that RCS does and more, and Emacs supports it as well (or at least recent versions of Emacs do).

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