[opam-devel] opam getting compiler version wrong

[Ashish Agarwal]

Seems the issue is mis-interpretation of a deprecated constraint. I'm using
Jane Street's opam repository [1], which contains constraints like:

available: [ ocaml-version >= "4.03.0" ]

After replacing this with a normal constraint in the `depends` field, it
worked fine. Is there a tool to convert old opam files?

[1] https://github.com/janestreet/opam-repository


On Wed, Dec 7, 2016 at 8:04 AM, Ashish Agarwal <agarwal1975 at gmail.com>
wrote:

> I'm getting this:
>
> $ opam install ppx_sexp_conv.114.10+84
> [ERROR] ppx_sexp_conv.114.10+84 has unmet availability conditions:
> ocaml-version >= "4.03.0"
>
> So opam thinks my ocaml version is < 4.03.0, but I'm in a 4.03.0 switch.
> I've certainly run "eval `opam config env`". I created a new switch with
> 4.03.0 to try it from scratch, but get the same issue.
>
> Sanity checks:
>
> $ ocaml -version
> The OCaml toplevel, version 4.03.0
>
> $ opam info ocaml | grep all-installed-versions
> all-installed-versions 4.03.0 [4.03.0]  4.04.0 [4.04.0]
>
> Incidentally, I'm confused about the output of `opam info ocaml`. I have 6
> switches on this computer. How come only 2 are listed above?
>
> $ opam --version
> 2.0~alpha5
>
>
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