Re: [Caml-list] LablGtk3 beta1

[Jacques Garrigue <garrigue@math.nagoya-u.ac.jp>]

2018/12/14 20:38, Emilio Jesús Gallego Arias <e@x80.org>:
> 
> Hi Francois,
> 
> Francois Berenger <mlists@ligand.eu> writes:
> 
>> You are suggesting that opam should support the installation of
>> different versions of the same thing.
>> I think nix can do that, and that indeed looks like a current
>> limitation of opam.
> 
> I wasn't going that far [as that tends to be quite complicated
> technically].
> 
> I just proposed that our OPAM workflow should support for packages to
> specify versioned dependencies on depext stuff, so a package A can do
> "gtk-3.0 >= 3.12" and some other package B can specify "gtk-3.0 >=
> 3.14".
> 
> Even if that only serves as documentation for now.
> 
> The `conf-gtk` approach seems not very well suited for this.

Emilio, I do agree with you on that.
I added a conf-gtk3 as was suggested to me, and since lablgtk3 requires
gtk 3.18, if dependes on a versioned package conf-gtk3.18 (i.e. cong-gtk3 ">= 18”)
However, if somebody else introduces a conf-gtk3.22 version, that one will
be installed by default (even for lablgtk3), and fail if one gtk-3.18 is available,
so this does not seem to be the right solution for versioning, and I see no
other way to do it with the current opam.

Jacques


-- 
Caml-list mailing list.  Subscription management and archives:
https://sympa.inria.fr/sympa/arc/caml-list https://inbox.ocaml.org/caml-list
Forum: https://discuss.ocaml.org/
Bug reports: http://caml.inria.fr/bin/caml-bugs