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

[Hongyi Zhao]

On Wed, Jul 28, 2021 at 10:36 PM Drew Adams <drew.adams@oracle.com> wrote:
>
> > 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
> versions).
>
> 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...

Got it. Thank you for your explanation and systematic comments.

Regards,
Hongyi