Re: [Swig-devel] Latest OCaml versions and SWIG

[Olly B. <ol...@su...>]

On 2021-11-17, William S Fulton <ws...@fu...> wrote:
> You may be aware that we've moved from Travis to Github Actions for
> Continuous Integration testing. With that, we have had to update the base
> operating systems. The default OS on Github Actions is the latest long term
> support version - ubuntu-20.04. The version of OCaml on this is 4.08.1 and
> fails as can be seen in this build:
> https://github.com/swig/swig/runs/4243992545?check_suite_focus=true
>
> I managed to get it to pass by reverting it to ubuntu-18.04 which has OCaml
> 4.05.0, see commit
> https://github.com/swig/swig/commit/335434525594e7759556cc23c5e4b2fb0282dbf1.
> While this will work for now, would you be able to find out what's needed
> so the examples and test-suite passes again with the latest OCaml?

With a fix for CAML_SAFE_STRING (which doesn't cause the errors in the
failed CI run) `make check-ocaml-test-suite` passes for me on Debian
unstable using OCaml 4.13.1.

So perhaps those failures have been addressed in OCaml?

FWIW, available version in the Ubuntu repos are:

$ rmadison -uubuntu ocaml
 ocaml | 4.01.0-3ubuntu3   | trusty                  | source, amd64, arm64, armhf, i386, powerpc, ppc64el
 ocaml | 4.01.0-3ubuntu3.1 | trusty-security         | source, amd64, arm64, armhf, i386, powerpc, ppc64el
 ocaml | 4.01.0-3ubuntu3.1 | trusty-updates          | source, amd64, arm64, armhf, i386, powerpc, ppc64el
 ocaml | 4.02.3-5ubuntu2   | xenial/universe         | source, amd64, arm64, armhf, i386, powerpc, ppc64el, s390x
 ocaml | 4.05.0-10ubuntu1  | bionic/universe         | source, amd64, arm64, armhf, i386, ppc64el, s390x
 ocaml | 4.08.1-8          | focal/universe          | source, amd64, arm64, armhf, i386, ppc64el, riscv64, s390x
 ocaml | 4.11.1-4          | impish/universe         | source, amd64, arm64, armhf, i386, ppc64el, riscv64, s390x
 ocaml | 4.11.1-5ubuntu1   | jammy/universe          | source, amd64, arm64, armhf, i386, ppc64el, riscv64, s390x
 ocaml | 4.13.1-3ubuntu1   | jammy-proposed/universe | source, amd64, arm64, armhf, i386, ppc64el, riscv64, s390x

The next LTS release should be "jammy" in April this year, so maybe we
need to wait until that's available.  Or can we use non-LTS with the
new CI system?  Or install OCaml from a PPA or similar?

Cheers,
    Olly