[ANNOUNCEMENT] unison2.48-2.48.4-2 (Warning: possible breakage)
Andrew Schulman
schulman.andrew@epa.gov
Tue Sep 1 00:39:07 GMT 2020
> > There is unfortunately another layer of incompatibility in Unison: Two
> > Unison executables are only compatible if they were built with the same
> > version of OCaml.
>
> What a mess!
Glad you understand :)
> Would you consider embedding the OCaml version in the package name
> as suggested by the Debian maintainer
> (http://lists.seas.upenn.edu/pipermail/unison-hackers/2020-August/001975.html)?
> Thus unison2.48-2.48.4-1 would be replaced by something like
> unison2.48+4.04.1... and unison2.48-2.48.4-2 would be replace by something like
> unison2.48+4.08.1.... That way people who are happy with unison2.48-2.48.4-1
> can keep using it without being pestered by setup to update.
Yes, I could do that. I was hoping to avoid it, but it may be the only realistic
solution.
It may be mainly Unison 2.48 that's affected, and maybe also 2.51 and the
forthcoming 2.52. I guess that very few people are still using the older
versions, and if they are they don't want any changes now.
> FWIW, here's my situation, which is probably not typical. When you released
> unison2.48-2.48.4-1 a few years ago, it was incompatible with the Linux server
> that I sync with. So I simply built OCaml and unison myself on that server,
> using the same versions that you used, and installed unison in my own ~/bin
> directory.
>
> I could do that again, now using OCaml 4.08.1. But I'd much rather just keep my
> current arrangement, without having setup try to update unison2.48 every time I
> run it.
Thanks, that's helpful to know. Your situation might not be unusual, I don't
know. For all I know, you and I are the only Cygwin Unison users.
So was unison2.48-2.48.4-1 built with OCaml 4.04.1? I don't remember, and I'm
not sure how to tell.
Andrew
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