Re: [Caml-list] Producing a C wrapper with ocamlbuild or OMake

["Nicolas Pouillard" <nicolas.pouillard@gmail.com>]

Hum, -output-obj is more a link operation....

Using this rule:

...
    flag ["ocaml"; "link"; "output_obj"] (A"-output-obj");
    (* I will make this one part of the standard set of flags *)

    rule "output C obj"
      ~deps:["%.cmx"; "%.o"]
      ~prod:"%caml.o"
      (Ocamlbuild_pack.Ocaml_compiler.native_link "%.cmx" "%caml.o");
...

Plus having this in your _tags

<*caml.o>: output_obj

Will works fine.

On 3/28/07, Joel Reymont <joelr1@gmail.com> wrote:
> Nicolas,
>
> I think I'm missing one more bit:
>
> ocamlbuild main
>
> + ocamlfind ocamlopt -package ounit -output-obj morpher.ml -o
> morphercaml.o
> No implementations provided for the following modules:
>    Symtab referenced from morpher.cmx
>    Ninja referenced from morpher.cmx
>    Easy_lexer referenced from morpher.cmx
>    Easy_parser referenced from morpher.cmx
>    Ppninja referenced from morpher.cmx
>    Pretty referenced from morpher.cmx
>    Parser_util referenced from morpher.cmx
>    Ninja_morph referenced from morpher.cmx
> Command exited with code 2.
> Compilation unsuccessful after building 2 targets (1 cached) in
> 00:00:00.
>
> My complete plugin file is below. I can build my test program just
> fine using
>
> ocamlbuild test.byte
>
> but trying to produce the library gives me the above error.
>
> What am I missing? How can I have morpher.ml automatically pull in
> the other modules?
>
> I do open modules at the top of morpher.ml like this
>
> open Ninja_morph
> open Parser_util
> module PP = Ppninja
> module N = Ninja
>
>
>         Thanks, Joel
>
> ---
>
> open Ocamlbuild_plugin;;
> open Command;;
>
> let cc = A"cc";;
> let ar = A"ar";;
> let packages = "ounit" (* "pkg1,pkg2,..." *);;
>
> let ocamlfind cmd =
> S[A"ocamlfind"; A cmd; A"-package"; A packages];;
>
> flag ["ocaml"; "link"] (A"-linkpkg");;
>
> dispatch begin function
> | After_options ->
>       Options.ocamlc := ocamlfind "ocamlc";
>       Options.ocamlopt := ocamlfind "ocamlopt";
> | After_rules ->
>       rule "output C obj"
>         ~dep:"%.ml"
>         ~prod:"%caml.o"
>         begin fun env _ ->
>           let caml_o = env "%caml.o" and ml = env "%.ml" in
>             Cmd(S[!Options.ocamlopt; A"-output-obj"; P ml; A"-o"; Px
> caml_o])
>         end;
>       rule "build C lib"
>         ~deps:["%_stubs.o"; "%caml.o"]
>         ~prod:"lib%.a"
>         begin fun env _ ->
>           let wrap_o = env "%wrap.o"
>           and caml_o = env "%caml.o"
>           and libasmrun = !
> *Ocamlbuild_pack.Ocaml_utils.stdlib_dir/"libasmrun.a"
>           and lib_a = env "lib%.a" in
>             Seq[cp libasmrun lib_a;
>                 Cmd(S[ar; A"r"; Px lib_a; P caml_o; P wrap_o])]
>         end;
>       rule "build morpher"
>         ~deps:["libmorpher.a"; "main.o"]
>         ~prod:"main"
>         begin fun _ _ ->
>           Cmd(S[cc; P"morpher.o"; P"libmorpher.a"; A"-o"; Px"main"])
>         end;
> | _ -> ()
> end
>
> --
> http://wagerlabs.com/
>
>
>
>
>
>


-- 
Nicolas Pouillard