Re: [Caml-list] Natively compiled code and toplevel

Re: [Caml-list] Natively compiled code and toplevel

[David Gurr]

> From owner-caml-list@pauillac.inria.fr Wed Jun 13 19:09:47 2001
> From: Jacques Garrigue <garrigue@kurims.kyoto-u.ac.jp>
> To: wester@ilt.fhg.de
> Cc: caml-list@inria.fr
> X-Authentication-Warning: pauillac.inria.fr: majordomo set sender to owner-caml-list@pauillac.inria.fr using -f
> Subject: Re: [Caml-list] Natively compiled code and toplevel 
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> Date: Thu, 14 Jun 2001 11:06:45 +0900
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> 
> > I looked over the mktoplevel manual and as far as I understand  it is 
> > possible to link compiled C-code with the mktoplevel but not to link
> > with natively compiled OCaml code. Am I right and why is this the case? 
> > 
> > Rolf
> 
> You're right. To be efficient, native ocaml code does not use the same
> conventions as C, so you cannot call a natively compiled ocaml function
> as though it were a C function.
> 
> Fabrice Le Fessant has done some work on the other way round. See
> asmdynlink on this page: http://pauillac.inria.fr/~lefessan/src/.
> The idea is to be able to execute ocaml bytecode inside a native
> program. With a large amount of hacking, it should be possible to
> build an ocaml.opt, which in turn would allow you to link the toplevel
> with native code...
> I'm not sure it is worth the pain.

FWIW, Jocaml allows this and Jocaml is an extension of Ocaml.

> 
> Cheers,
> 
> Jacques Garrigue
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[Caml-list] Natively compiled code and toplevel

[wester]

Hi,

I looked over the mktoplevel manual and as far as I understand  it is 
possible to link compiled C-code with the mktoplevel but not to link
with natively compiled OCaml code. Am I right and why is this the case? 

Rolf

 
-------------------------------------
Rolf Wester
wester@ilt.fhg.de
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Re: [Caml-list] Natively compiled code and toplevel

[Jacques Garrigue]

> I looked over the mktoplevel manual and as far as I understand  it is 
> possible to link compiled C-code with the mktoplevel but not to link
> with natively compiled OCaml code. Am I right and why is this the case? 
> 
> Rolf

You're right. To be efficient, native ocaml code does not use the same
conventions as C, so you cannot call a natively compiled ocaml function
as though it were a C function.

Fabrice Le Fessant has done some work on the other way round. See
asmdynlink on this page: http://pauillac.inria.fr/~lefessan/src/.
The idea is to be able to execute ocaml bytecode inside a native
program. With a large amount of hacking, it should be possible to
build an ocaml.opt, which in turn would allow you to link the toplevel
with native code...
I'm not sure it is worth the pain.

Cheers,

Jacques Garrigue
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Re: [Caml-list] Natively compiled code and toplevel

[Fabrice Le Fessant]

asmdynlink is included in the CDK (the version of ~lefessan/src is not
supported anymore), and allows to link any Ocaml bytecode module
OR EVALUATE ANY OCAML SOURCE from a native-code program. Of course, it
also works for bytecode programs, using the standard interpreter. For
native-code programs, bytecode interpretation is slower than when
executed by the standard interpreter. However, available native-code
functions are always used.

- Fabrice
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