[Caml-list] Re: camljava inside a toplvel ?

[Gregoire Henry <Gregoire.Henry@pps.jussieu.fr>]

Hello,

I've got the same within Linux.

It's just a "typo" in 'jnistubs.c' file :

line 389 the function should be called : camljava_CallStaticCamlintMethod
instead of :
camljava_CallStaticCamlIntMethod

with a lower 'i' in Camlint

Then :

$ ocamlmktop -o ocamljni -I +camljava jni.cma
$ ./ocamljni -I +camljava

should work.

regards,
Gregoire Henry


EL CHAAR RABIH wrote:
> Hello,
> i'm working with camljava (Xavier Leroy) to call java classes via caml.
> 
> It uses jni and c-caml callbacks to achieve this.
> 
> A library jni.cma, which permits caml to  achieve this.
> In the test package, we have a jnitest.ml, and 2 java classes.
> 
> The creation of an executable via ocamlc works fine
> 
> ocamlc -I +camljava jni.cma jnitest.ml
> 
> launching the executable
> 
> CLASSPATH="." ./camlprog works fine.
> 
> I'm trying to execute directly the jnitest.ml via the ocaml toplevel.
> 
> I've tried doing the following
> ocaml -I +camljava jni.cma jnitest.ml but it doesn't work, and i have an
> error message that some external functions are not here
> The external function `camljava_AllocObject' is not available
> 
> If i understand the problem, since these functions are declared as external,
> i've tried to build a new toplevel, ocamljni which supports them.
> Unfortunately, things don't seem to be that easy.
> 
> To achieve jni.cma, we have jni.ml, jni.mli and jnistubs.c
> 
> jni.ml is compiled into a jni.cmo
> jnistubs.c is compiled into jnistubs.obj
> 
> jnistubs.obj is put into library libcamljni.lib
> 
> jni.cmo and libcamljni.lib enter in the creation of jni.cma.
> 
> I've tried following the same approach, using libcamljni.lib and jni.cmo for
> creating the ocamljni toplevel.
> when i'm trying to do this
> ocamlmktop -verbose -o ocamljni -linkall -custom jni.cmo -cclib -lcamljni
> -cclib D:/APPLI/j2sdk1.4.1_01/lib/jvm.lib i'm having the following exception
> in the linking process (CL)
> 
> + cl /nologo /MT /Fe"mlfijni.exe" -I"D:\APPLI\MLFi\lib"
> c:\TEMP\camlprimcd1cd1.c "libcamljni.lib" "D:/APPLI/j2sdk1.4.1_0
> 1/lib/jvm.lib" "D:\APPLI\MLFi\lib\libcamlrun.lib" advapi32.lib
> camlprimcd1cd1.c
> camlprimcd1cd1.obj : error LNK2001: unresolved external symbol
> _camljava_CallStaticCamlintMethod
> mlfijni.exe : fatal error LNK1120: 1 unresolved externals
> Error while building custom runtime system
> 
> The function camljava_CallStaticCamlintMethod is defined inside jnistubs.c,
> and should be therefore present inside libcamljni.lib.
> 
> Am i missing something ??
> 
> Thanks in advance for your help.
> 
> 
> 
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