Well, it seems that I have a much simpler problem (and it is not related to
camlp4of specifically): the only thing I'm missing is a '-syntax camlp4o'
when compiling the library. Indeed, adding:

<src/syntax/*>: syntax_camlp4o

at the end of _tags fixes the problem. I must have forgotten an option in
the _oasis file, but I can't see which. Anyway, many thanks William !
ph.


2011/8/2 William Le Ferrand <William.Le-Ferrand@polytechnique.edu>

> Hi
>
> I let Sylvain detailing how things should be done properly but as a
> quick hack you can add at the bottom of the _tags file <src/*.ml{,i}>:
> syntax_camlp4of , it should do the trick (and it won't be erased by
> oasis setup if you put it after the #OASIS_END line.
>
> Hope it helps
>
> William
>
>
>
> On Tue, Aug 2, 2011 at 1:32 PM, Philippe Veber <philippe.veber@gmail.com>
> wrote:
> > Hello,
> > how can I tell oasis that my syntax extension needs camlp4of instead of
> > camlp4o ? I tried to add a ByteOpt line for this:
> >
> > Library pa_guizmin
> >   Path:               src/syntax
> >   Modules:            Pa_guizmin
> >   FindlibParent:      guizmin
> >   FindlibName:        syntax
> >   BuildDepends:       camlp4.lib, camlp4.quotations.o
> >   CompiledObject:     byte
> >   ByteOpt:            -pp camlp4of
> >
> > and indeed myocamlbuild.ml now contains:
> >
> > let package_default =
> >   {
> >      MyOCamlbuildBase.lib_ocaml =
> >        [("src/syntax/pa_guizmin", ["src/syntax"]); ("src/guizmin",
> > ["src"])];
> >      lib_c = [];
> >      flags =
> >        [
> >           (["oasis_library_pa_guizmin_byte"; "ocaml"; "link"; "byte"],
> >             [(OASISExpr.EBool true, S [A "-pp"; A "camlp4of"])]);
> >           (["oasis_library_pa_guizmin_byte"; "ocaml"; "ocamldep";
> "byte"],
> >             [(OASISExpr.EBool true, S [A "-pp"; A "camlp4of"])]);
> >           (["oasis_library_pa_guizmin_byte"; "ocaml"; "compile"; "byte"],
> >             [(OASISExpr.EBool true, S [A "-pp"; A "camlp4of"])])
> >        ];
> >      }
> >   ;;
> >
> > But still, these options are not used when I compile using ocaml
> setup.ml
> > -build
> >
> > + ocamlfind ocamldep -package camlp4.quotations.o -package camlp4.lib
> > -package camlp4.extend -modules src/syntax/pa_guizmin.ml >
> > src/syntax/pa_guizmin.ml.depends
> > File "src/syntax/pa_guizmin.ml", line 22, characters 3-5:
> > Error: Syntax error
> >
> > Am I missing something ?
> >
> > Cheers,
> >   Philippe.
> >
>
>
>
> --
> William Le Ferrand
>
> Mobile : (+1) (415) 683-1484
> Web : http://williamleferrand.github.com/
>