- Is OCaml 3.12 really required to be able to build it ?

- By the way, I got this with Ocaml 3.11.1 and lwt 2.1.1. Maybe it's
related to my first question.

+ ocamlfind ocamlopt -c -g -I src -package xmlm -package
type-conv.syntax -package lwt.unix -package lwt.syntax.log -package
lwt.syntax -package lwt.react -package camlp4.quotations.o -package
camlp4.extend -syntax camlp4o -ppopt syntax/pa_obus.cmo -I src -I
syntax -I bindings/upower -I bindings/hal -I bindings/network-manager
-I bindings/policykit -I bindings/notification -I bindings/udisks -o
src/oBus_string.cmx src/oBus_string.ml
File "src/oBus_string.ml", line 35, characters 2-27:
Error: Unbound value Printexc.register_printer
Command exited with code 2.
E: Command '/usr/bin/ocamlbuild tools/obus_gen_interface.native -tag
debug' terminated with error code 10