]> Hello, just curious: why can't I produce mixed ocaml+c executable using bootstrap compiler? File test.ml: external cstring: unit -> string = "cstring";; Printf.printf "%s\n" (cstring ()) File testc.c: #include <ctype.h> #include <mlvalues.h> #include <alloc.h> #include <memory.h> #include <fail.h> #include <string.h> CAMLprim value cstring() { CAMLparam0(); CAMLlocal1(res); char * q; res = alloc_string(7); q = String_val(res); strcpy (q, "Hello!"); CAMLreturn(res); } $ gcc -I ../byterun -c testc.c $ ../boot/ocamlrun.exe ../boot/ocamlc -nostdlib -I ../boot -custom -o test testc.o test.ml ../boot/libcamlrun.a(unix.o):unix.c:(.text+0x465): undefined reference to `_flexdll_dlopen' ../boot/libcamlrun.a(unix.o):unix.c:(.text+0x478): undefined reference to `_flexdll_dlclose' ../boot/libcamlrun.a(unix.o):unix.c:(.text+0x492): undefined reference to `_flexdll_dlsym' ../boot/libcamlrun.a(unix.o):unix.c:(.text+0x4ae): undefined reference to `_flexdll_dlopen' ../boot/libcamlrun.a(unix.o):unix.c:(.text+0x4bd): undefined reference to `_flexdll_dlsym' ../boot/libcamlrun.a(unix.o):unix.c:(.text+0x4ca): undefined reference to `_flexdll_dlerror' collect2: ld returned 1 exit status File "test.ml", line 1, characters 0-1: Error: Error while building custom runtime system $ ../boot/ocamlrun.exe ../ocamlc -nostdlib -I ../boot -custom -o test testc.o test.ml $ ./test Hello! What do I do wrong? Best regards, Dmitri Boulytchev, St.Petersburg State University.