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RE: [External] : Re: Package cl is deprecated

From: Drew Adams
Subject: RE: [External] : Re: Package cl is deprecated
Date: Wed, 28 Jul 2021 14:36:40 +0000

> Then it's from a package and you need to identify it.

To be clear about one point -

You don't _need_ to identify it or change it.  You can
likely do so without creating problems, if you want to.

Deprecation does not mean desupport.  Library `cl.el' is
still _supported_.  At some future point it might become
desupported (probably will) - but it's supported now.

In addition, if you find (require 'cl) in some 3rd-party
library that you use, what do you intend to do about that?

You can notify the library maintainers, so they can decide
what to do or inform you about what you might do.  Or you
can modify that library source code yourself, to replace
that with (require 'cl-lib).

But besides not _needing_ to do any such thing, be aware
that a 3rd-party library may use such code intentionally,
for backward compatibility (even if you don't need that,
the library might want it, for other users on older Emacs

So if it's about a 3rd-party library, you might want to
check with its maintainers.

If it's a (require 'cl) in vanilla Emacs code then you
can file a bug report / enhancement request, to let the
Emacs maintainers know about it: `M-x report-emacs-bug'.

In any case, if you report it to whomever its maintainers
are, even if it gets "fixed" right away, unless you use
the most recent source code available (e.g. build Emacs
yourself, if the fix is in Emacs itself), you'll need to
wait some.

Remember, this is a byte-compiler warning message.  It's
not an error message.  There's really nothing that you
_need_ to fix.  But if the warning really bothers you then...

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