On 26-01-2009, David Rajchenbach-Teller <David.Teller@ens-lyon.org> wrote:
>       Dear list,
>
>   Working on Batteries, we're faced with a few places where we'd like to
> perform conditional compilation depending on the version of OCaml being
> used. We could probably do this with Camlp4, cpp, Autoconf hackery, etc.
> -- but first, we need to decide on which of these options we'll adopt.
>
> Any suggestion?
>

There is optcomp:
https://forge.ocamlcore.org/projects/optcomp/
http://darcs.ocamlcore.org/repos/optcomp/optcomp/README

The example in README should talk to you directly.

Regards,
Sylvain Le Gall