Excerpts from Charles Hymans's message of Tue Jun 10 20:15:13 +0200 2008:
> Hi,
> 
> I'd like to generate a library from a file that uses the nums library
> (in a way such that the final user of my library does not have to
> specify that nums is necessary).
> 
> I was able to generate a .cma with the following command:
> ocamlc -a nums.cma file.ml -o lib.cma
> 
> However to generate a .cmxa, the command:
> ocamlopt -a nums.cmxa file.ml -o lib.cmxa
> 
> fails and reports the error that "nums.cmxa is not a compilation unit
> description."

In byte-code libraries can contains libraries, but not in native code.

-- 
Nicolas Pouillard aka Ertai