Excerpts from Roberto Bagnara's message of Wed Aug 13 09:32:51 +0200 2008:
> Vincent Hanquez wrote:
> > On Tue, Aug 12, 2008 at 07:03:06PM +0200, Roberto Bagnara wrote:
> >> Hi there,
> >>
> >> it seems that `ocamlc' wants to create the .cmo file in the same
> >> directories as the .ml file.  More specifically I observe this:
> >>
> >> $ ocamlc -g -c -I +gmp -I ../../../interfaces/OCaml ../../../interfaces/OCaml/ppl_ocaml_types.ml
> >> I/O error: ../../../interfaces/OCaml/ppl_ocaml_types.cmo: Permission denied
> >>
> >> The ../../../interfaces/OCaml directory is read-only:
> >> is there an option causing `ocamlc' to write the .cmo
> >> file in the current directory instead?
> > 
> > you can use "-o ./ppl_ocaml_types.cmo"
> 
> Thanks Vincent, but it does not work:
> 
> $ ocamlc -g -c -I +gmp -I ../../../interfaces/OCaml ../../../interfaces/OCaml/ppl_ocaml_types.ml
> I/O error: ../../../interfaces/OCaml/ppl_ocaml_types.cmo: Permission denied
> $ ocamlc -g -c -I +gmp -I ../../../interfaces/OCaml ../../../interfaces/OCaml/ppl_ocaml_types.ml -o ./ppl_ocaml_types.cmo
> I/O error: ../../../interfaces/OCaml/ppl_ocaml_types.cmo: Permission denied
> $ ocamlc -version
> 3.10.1
> 
> Any other idea?

The -o option should be before the .ml.

Regards,

-- 
Nicolas Pouillard aka Ertai