OCaml shares lib for another shared lib

Question

I am exploring some adventurous ideas.

TL: DR; gnumake can use loadable modules, I'm trying to use this C barrier to use OCaml, but you have problems initializing the OCaml environment.

I have this OCaml code:

(* This is speak_ocaml.ml *)
let do_speak () =
  print_endline "This called from OCaml!!";
  flush stdout;
  "Some return value from OCaml"

let () =
  Callback.register "speak" do_speak

and I also have this C code: (Yes, I need to use additional macros CAML, but not relevant here)

#include <stdlib.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>

#include <gnumake.h>
#include <caml/mlvalues.h>
#include <caml/callback.h>
#include <caml/memory.h>
#include <caml/alloc.h>

int plugin_is_GPL_compatible;

char *ocaml_speaker(const char *func_name, int argc, char **argv)
{
  char *answer =
    String_val(caml_callback(*caml_named_value("speak"), Val_unit));

  printf("Speaking and got: %s\n", answer);
  char *buf = gmk_alloc(strlen(answer) + 1);
  strcpy(buf, answer);
  /* receive_arg */
  return buf;
}

int do_speak_gmk_setup()
{
  printf("Getting Called by Make\n");
  // This is pretty critical, will explain below
  char **argv = {"/home/Edgar/foo", NULL};
  caml_startup(argv);
  printf("Called caml_startup\n");
  gmk_add_function("speak", ocaml_speaker, 1, (unsigned int)1, 1);
  return 1;
}

and I compile it using this makefile

all:
    ocamlopt -c speak_ocaml.ml
    ocamlopt -output-obj -o caml_code.o speak_ocaml.cmx
    clang -I`ocamlc -where` -c do_speak.c -o do_speak.o

    clang -shared -undefined dynamic_lookup -fPIC -L`ocamlc -where` -ldl \
    -lasmrun do_speak.o caml_code.o -o do_speak.so

show_off:
    echo "Speaker?"
    ${speak 123}

clean:
    @rm -rf *.{cmi,cmt,cmi,cmx,o,cmo,so}

And my problem is that it only printf("Getting Called by Make\n");turns off when I add the appropriate one load do_speak.soto the Makefile, it caml_startupdoesn't work correctly. Now I call caml_startup, because if I do not, I get an error

Makefile:9: dlopen(do_speak.so, 9): Symbol not found: _caml_atom_table
  Referenced from: do_speak.so
  Expected in: flat namespace
 in do_speak.so
Makefile:9: *** do_speak.so: failed to load.  Stop.

- , clang OS X , . : http://psellos.com/2014/10/2014.10.atom-table-undef.html

... C- OCaml, C, , , argv, caml_startup . , , caml_startup(NULL) char **argv = {NULL}; caml_startup(argv) . , .

Answer 1

, . :

, caml_startup (NULL) char ** argv = {NULL}; caml_startup (argv) . , .

, argv caml_startup ( Sys.argv). , , :

char *arg = NULL;
caml_startup(&arg);

argv ( ). , , :

char *argv[] = { "program", NULL };
caml_startup(argv);