Excerpts from Richard Cobbe's message of Wed Mar 26 00:17:12 +0100 2008:
> I'm having some difficulty getting ocamlbuild to produce native binaries
> for a project that's spread over multiple directories.  I'm hoping someone
> can explain what I'm doing wrong here.

You've hitted the -for-pack oddify :)

[...]

>     <frontEnd/**/*.ml>: for-pack(frontEnd)
>     <backEnd/**/*.ml>: for-pack(backEnd)
>     <dataRep/**/*.ml>: for-pack(dataRep)

Almost there... that's .cmx instead of .ml

     <frontEnd/**/*.cmx>: for-pack(frontEnd)
     <backEnd/**/*.cmx>: for-pack(backEnd)
     <dataRep/**/*.cmx>: for-pack(dataRep)

Best regards,

-- 
Nicolas Pouillard aka Ertai