]> > Could you point out what problem you faced? I try to create a static library called "libadd5wrapperlib.a" ( I know kinda WTF ). So here is my simple example: (Warning: You'll see a lot of bad code below, sorry for that, I work hard to improve) ===== $ cat ./add5.ml ===== (* the code doesnt add anything yet, it just gives 5 back *) let add_five () = let i = ref 0 in i := 5; !i;; Callback.register "add five" add_five;; ===== $ cat ./add5wrapperlib.c (Wraps the Ocaml code ) ===== #include <stdio.h> #include <caml/mlvalues.h> #include <caml/callback.h> int add5wrapper(char **argv) { int add_5; caml_startup(argv); add_5=Int_val(callback(*caml_named_value("add five"),Val_unit)); return add_5; } ===== $ cat ./include/libadd5wrapper.h (header file) ===== extern int add5 (char **argv); ===== $ cat ./main.c ===== #include <stdio.h> #include "libadd5wrapper.h" int main (int argc,char **argv){ printf("Gimme - %d \n", add5wrapper()); return 0; } Now I try to BUILD the whole thing: ---------------------------------------------- # 1.) Build the OCaml code ocamlopt -output-obj add5.ml -o add5-prog.o # 2.) Create the static library gcc -c add5wrapperlib.c ar rs lib/libadd5wrapperlib.a add5wrapperlib.o # 3.) Create the main object file gcc -c main.c -Iinclude -I"`ocamlc -where`" # 4.) Build the whole thing: gcc --static -Iinclude -Llib -o mainprog.opt main.o add5wrapperlib.o -L"`ocamlc -where`" -ladd5wrapperlib -lm -ldl -lasmrun Number 4 is where it breaks. I get a ton of errors and this is where it ends for me. Because # 4 is also the point where I definitely have no idea what I'm doing. Thanks for helping me. Errors of #4: /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(startup.o): In function `caml_main': startup.c:(.text+0x209): undefined reference to `caml_data_segments' startup.c:(.text+0x21d): undefined reference to `caml_code_segments' /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(floats.o): In function `caml_ceil_float': floats.c:(.text+0x225): undefined reference to `ceil' /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(floats.o): In function `caml_atan2_float': floats.c:(.text+0x24b): undefined reference to `atan2' /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(floats.o): In function `caml_atan_float': floats.c:(.text+0x268): undefined reference to `atan' /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(floats.o): In function `caml_acos_float': floats.c:(.text+0x285): undefined reference to `acos' /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(floats.o): In function `caml_asin_float': floats.c:(.text+0x2a2): undefined reference to `asin' /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(floats.o): In function `caml_tanh_float': floats.c:(.text+0x2bf): undefined reference to `tanh' /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(floats.o): In function `caml_tan_float': floats.c:(.text+0x2dc): undefined reference to `tan' /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(floats.o): In function `caml_cosh_float': floats.c:(.text+0x2f9): undefined reference to `cosh' /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(floats.o): In function `caml_cos_float': floats.c:(.text+0x316): undefined reference to `cos' /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(floats.o): In function `caml_sinh_float': floats.c:(.text+0x333): undefined reference to `sinh' /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(floats.o): In function `caml_sin_float': floats.c:(.text+0x350): undefined reference to `sin' /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(floats.o): In function `caml_power_float': floats.c:(.text+0x376): undefined reference to `pow' /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(floats.o): In function `caml_sqrt_float': floats.c:(.text+0x3a6): undefined reference to `sqrt' /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(floats.o): In function `caml_log10_float': floats.c:(.text+0x487): undefined reference to `log10' /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(floats.o): In function `caml_log_float': floats.c:(.text+0x4a4): undefined reference to `log' /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(floats.o): In function `caml_fmod_float': floats.c:(.text+0x599): undefined reference to `fmod' /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(floats.o): In function `caml_floor_float': floats.c:(.text+0x5b6): undefined reference to `floor' /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(floats.o): In function `caml_exp_float': floats.c:(.text+0x5d3): undefined reference to `exp' /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(unix.o): In function `caml_dlerror': unix.c:(.text+0x1db): undefined reference to `dlerror' /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(unix.o): In function `caml_dlsym': unix.c:(.text+0x1f5): undefined reference to `dlsym' /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(unix.o): In function `caml_dlclose': unix.c:(.text+0x208): undefined reference to `dlclose' /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(unix.o): In function `caml_dlopen': unix.c:(.text+0x223): undefined reference to `dlopen' /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(i386.o): In function `caml_start_program': (.text+0x129): undefined reference to `caml_program' /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(i386.o): In function `caml_callback2_exn': (.text+0x221): undefined reference to `caml_apply2' /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(i386.o): In function `caml_callback3_exn': (.text+0x241): undefined reference to `caml_apply3' /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(fail.o): In function `caml_array_bound_error': fail.c:(.text+0x75): undefined reference to `caml_exn_Invalid_argument' /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(fail.o): In function `caml_raise_stack_overflow': fail.c:(.text+0x98): undefined reference to `caml_bucket_Stack_overflow' /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(fail.o): In function `caml_raise_out_of_memory': fail.c:(.text+0xaa): undefined reference to `caml_bucket_Out_of_memory' /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(fail.o): In function `caml_raise_sys_error': fail.c:(.text+0x144): undefined reference to `caml_exn_Sys_error' /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(fail.o): In function `caml_invalid_argument': fail.c:(.text+0x17d): undefined reference to `caml_exn_Invalid_argument' /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(fail.o): In function `caml_failwith': fail.c:(.text+0x196): undefined reference to `caml_exn_Failure' /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(fail.o): In function `caml_raise_sys_blocked_io': fail.c:(.text+0x21a): undefined reference to `caml_exn_Sys_blocked_io' /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(fail.o): In function `caml_raise_not_found': fail.c:(.text+0x22c): undefined reference to `caml_exn_Not_found' /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(fail.o): In function `caml_raise_zero_divide': fail.c:(.text+0x23e): undefined reference to `caml_exn_Division_by_zero' /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(fail.o): In function `caml_raise_end_of_file': fail.c:(.text+0x250): undefined reference to `caml_exn_End_of_file' /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(roots.o): In function `caml_init_frame_descriptors': roots.c:(.text+0x118): undefined reference to `caml_frametable' roots.c:(.text+0x136): undefined reference to `caml_frametable' roots.c:(.text+0x18f): undefined reference to `caml_frametable' roots.c:(.text+0x207): undefined reference to `caml_frametable' /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(roots.o): In function `caml_do_roots': roots.c:(.text+0x25c): undefined reference to `caml_globals' roots.c:(.text+0x293): undefined reference to `caml_globals' /usr/local/godi/lib/ocaml/std-lib/libasmrun.a(roots.o): In function `caml_oldify_local_roots': roots.c:(.text+0x364): undefined reference to `caml_globals' roots.c:(.text+0x36b): undefined reference to `caml_globals' collect2: ld returned 1 exit status 2009/1/9 Matthieu Dubuget <matthieu.dubuget@gmail.com>: > Ben Aurel a écrit : >> I'm thinking about the possibility to use OCaml as an extension >> language. If I wanted to call a OCaml function from langX I had to use >> a C wrapper. >> >> langX -> ( C API of langX | C Wrapper | C API of OCaml ) -> OCaml >> > > Yes > >> But could somebody tell me if ( and maybe how ) this can be done. I made some attempts, but >> there is always a main() function involved. But this C wrapper would be a shared library. >> > > Exactly. You can deliver your OCaml code as shared library, and then > call it from > any language that can call a shared library. > > Could you point out what problem you faced? > > Salutations > > Matt > > > _______________________________________________ > Caml-list mailing list. Subscription management: > http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list > Archives: http://caml.inria.fr > Beginner's list: http://groups.yahoo.com/group/ocaml_beginners > Bug reports: http://caml.inria.fr/bin/caml-bugs >