Re: [Caml-list] ocaml_startup et Solaris/x86

[Mathieu Avila <mavila@irisa.fr>]

Jacques Garrigue a écrit :

>From: Mathieu Avila <mavila@irisa.fr>
>
>  
>
>>>I'm using ocaml on Solaris8/x86, and many C libraries, with no
>>>problem.
>>>
>>>      
>>>
>>Are you able to call the ocaml code from the C ? I think this is rather 
>>different from calling C libs from a standalone OCaml code.
>>    
>>
>
>If you mean calling callback, I can. My libraries are full of
>callbacks from C to caml.
>
>  
>
>>In my case, i mix the 2 langages in this way :
>>
>>cmain.ml:
>>--------------------------------------------------------
>>let cmain_ocaml n = try
>>...
>>;;
>>
>>let _ = Callback.register "cmain_ocaml" cmain_ocaml
>>--------------------------------------------------------
>>
>>in a cmain_cpp.cpp , where there is the "real" main() function:
>>--------------------------------------------------------
>> static value * cmain_closure = NULL;
>> if (cmain_closure==NULL)
>>   cmain_closure = caml_named_value("cmain_ocaml");
>> result = Int_val(callback(*cmain_closure,Val_int(n)));
>>--------------------------------------------------------
>>
>>It crashses when calling :  callback(*cmain_closure...)
>>
>>All is compiled into native solaris object code.
>>The same thing works perfectly on solaris/sparc.
>>    
>>
>
>Do I understand correctly than the C code above is inside the main
>function?
>  
>
>Then I cannot see how it would work. Callback.register dynamically
>adds "cmain_ocaml" to a table of known functions. If you don't call
>ocaml's main function (i.e. the main() function of the ocaml C
>runtime, or at least caml_main()), your caml function will not be
>registered and this should not work.
>
>  
>
Sorry, i didn't show you all the useful code. There is a call to 
"ocaml_startup" with the appropriate
argv argument (i.e nothing). I believe this is where all initialisations 
are done. However, it works perfectly on Solaris/SPARC...

--
Mathieu



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