[Caml-list] opam switch recompilation with today's updates

[Caml-list] opam switch recompilation with today's updates

[David Allsopp]

The ocaml package has been updated in opam-repository in PR12832*. Since all
other packages depend on it, when you next run `opam update`, opam is going
to want to rebuild all the packages in your switches. The compiler itself
will not be rebuilt as part of this, "just" packages.

The ocaml package is a virtual package which probes the configuration of the
underlying OCaml compiler (either a system compiler, an opam-compiled OCaml,
or an opam-compiled patched compiler).

The reason for the change is to fix the creation of switches for compilers
which don't support shared libraries. The problem was that a script in the
ocaml package depended on the Unix library to probe the output of `ocamlc
-where`.

Sorry for the CPU-hogging inconvenience this will cause - it's a package we
aim to leave alone most of the time!


David



* https://github.com/ocaml/opam-repository/pull/12832


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