On 4 Jul 2018, at 22:31, Soegtrop, Michael > wrote: Thanks, for the info. What I still don’t get: is the 4.02.3 version of ocamlbuild the latest official release version and the 0.X version are somehow experimental? Weirdly, I don’t think ocamlbuild was ever an officially supported tool (its original purpose in 3.10.0 was to aid with camlp4’s complex bootstrap). Weird as it may seem, yes 0.2 > 4.02.3 in this context. However, I don’t think you can build the 4.02.3 tag in 4.03.0+ without patching and you’re not supposed to use the 0.x versions with 4.02.3 and earlier. Hope that vaguely helps! David Best regards, Michael Intel Deutschland GmbH Registered Address: Am Campeon 10-12, 85579 Neubiberg, Germany Tel: +49 89 99 8853-0, www.intel.de Managing Directors: Christin Eisenschmid, Christian Lamprechter Chairperson of the Supervisory Board: Nicole Lau Registered Office: Munich Commercial Register: Amtsgericht Muenchen HRB 186928 -- Caml-list mailing list. Subscription management and archives: https://sympa.inria.fr/sympa/arc/caml-list Beginner's list: http://groups.yahoo.com/group/ocaml_beginners Bug reports: http://caml.inria.fr/bin/caml-bugs