From: Maxence Guesdon <Maxence.Guesdon@inria.fr>
To: caml-list@inria.fr
Subject: Re: [Caml-list] Problem native dynlink loading cryptokit
Date: Fri, 9 Aug 2013 14:13:46 +0200 [thread overview]
Message-ID: <20130809141346.6d240680@alcazar> (raw)
In-Reply-To: <20130809114944.7111c7f5@alcazar>
On Fri, 9 Aug 2013 11:49:44 +0200
Maxence Guesdon <Maxence.Guesdon@inria.fr> wrote:
> On Fri, 09 Aug 2013 11:43:53 +0200
> Stéphane Glondu <steph@glondu.net> wrote:
>
> > Le 09/08/2013 11:33, Maxence Guesdon a écrit :
> > >>> Here is a test program:
> > >>> [...]
> > >>> gives me the following error:
> > >>>
> > >>> Fatal error: exception Failure("error loading shared
> > >>> library: /home/guesdon/.opam/4.00.1/lib/cryptokit/cryptokit.cmxs:
> > >>> undefined symbol: caml_sha1_init")
> > >>>
> > >>> Am I doing something wrong ? Or is something missing in cryptokit
> > >>> build ?
> > >>
> > >> It works for me (with system packages).
> > >>
> > >> caml_sha1_init should be in cryptokit.cmxs. The output of
> > >>
> > >> objdump -j .text -T /path/to/cryptokit.cmxs
> > >>
> > >> should contain all the C functions defined in cryptokit, plus some
> > >> caml_curry* functions and camlCryptokit__* functions (compiled from
> > >> OCaml). Is it true for you?
> > >
> > > No, I only have camlCryptokit__sha1_init_3833 which I assume corresponds
> > > to the function of src/cryptokit.ml:
> > > external sha1_init: unit -> string = "caml_sha1_init"
> >
> > Then, I suspect stubs were forgotten during the build of cryptokit.cmxs.
> > In the output of:
> >
> > ocamlobjinfo /path/to/cryptokit.cmxa
> >
> > there should be the following lines:
> >
> > Extra C object files: -lcryptokit_stubs -lz
> > Extra C options:
> >
> > Do you have the same lines? If so, maybe -linkall is missing in the call
> > to ocamlopt -shared (the one that builds cryptokit.cmxs).
>
> These lines are present in the .cmxa. But, sutdying the build commands,
> the .cmxs is produced from cryptokit.cmx, not cryptokit.cmxa. Running
> by hand
> # camlfind ocamlopt -shared -I src src/cryptokit.cmxa -linkall -o \
> src/cryptokit.cmxs
For the records, as suggested by Sylvain Le Gall, adding
use_libcryptokit_stubs in the _tags file to get:
"src/cryptokit.cmxs": use_cryptokit, use_libcryptokit_stubs
also produced a .cmxs file with the C part.
- m
next prev parent reply other threads:[~2013-08-09 12:14 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-09 9:09 Maxence Guesdon
2013-08-09 9:27 ` Stéphane Glondu
2013-08-09 9:33 ` Maxence Guesdon
2013-08-09 9:43 ` Stéphane Glondu
2013-08-09 9:49 ` Maxence Guesdon
2013-08-09 12:13 ` Maxence Guesdon [this message]
2013-08-09 12:41 ` [Caml-list] " Sylvain Le Gall
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