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Date: Mon, 20 Oct 2014 18:50:28 +0200
From: Marek Kubica <marek@xivilization.net>
To: Helmut Brandl <helmut.brandl@gmx.net>
Cc: caml-list@inria.fr
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Subject: Re: [Caml-list] Errors in installing 'lwt'

On Mon, 20 Oct 2014 11:24:10 -0500
Helmut Brandl <helmut.brandl@gmx.net> wrote:

> However can you explain to me what I have now. I think I have now two 
> versions of the ocaml compiler installed, one system wide (4.02.0)
> and one installed by opam (4.01.0).

Why 4.01.0? You could run 4.02.1 from OPAM, that has some nice
features :-)

> Is there any possibility to switch back to the system installation in 
> the same shell or do I need to use a fresh shell?

opam switch system

And then do the eval-dance :-)

> I still feel uncomfortable because I don't know why the installation
> of 'lwt' fails with my system installation of ocaml.

Im my experience, the Arch Linux ocaml/camlp4 packages are busted, I
filed a bug but nothing happened:
<https://bugs.archlinux.org/task/41907?dev=162>

(Also, keep in mind to switch to the system compiler when building
packages from AUR, because having the OPAM compiler in the path messes
things up).

regards,
Marek