[bug#43745] [PATCH] gnu: dune: Update to 2.7.1.

[Brett Gilio <brettg@gnu.org>]

Julien Lepiller <julien@lepiller.eu> writes:

> Hi Guix!
>
> This patch series updates dune to 2.7.1.  The first patch is unrelated,
> but reduces the number of dependents of ocaml-4.07, which I'd like to
> remove in the future, by building unison with 4.09.
>
> Then, 4 updates that are required, or they fail to build with the newer
> dune.  Since dune 2 removed jbuilder entirely, we need to get rid of
> every use of the #:jbuild argument, which I do in the following patches.
>
> I add stdlib-shims, which is required for other updates later in the
> series.  I then update 6 more packages, that fail in their current
> version with dune 2, but whose updated version work well with dune 1
> and 2.
>
> I add csexp, which is a dependency of dune-configurator 2, convert
> compiler-libs and jane-street-headers to ocaml-4.07 only (so they don't
> need to be updated for now, as that would create all sorts of issues).
> The penultimate patch ensures we build all ocaml4.07- packages with
> ocaml4.07-dune, which was not a problem before but...
>
> The last patch updates dune to 2.7.1, and keeps ocaml4.07-dune at its
> current version, which causes problems when mixing the two, hence the
> previous patch.
>
> The reason for preserving the version of ocaml4.07-dune is that many
> dependents were created for jbuilder, so we'd need to change many of
> them in order to update ocaml4.07-dune.
>
> In the future, I'd like to add ocaml 4.11, update bap and maybe some
> other packages to use ocaml 4.09, and remove 4.07, eliminating dune 1
> completely.

Wow, tremendous work. I look forward to going through these patches.

Brett Gilio