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[Caml-list] Dynlink problems
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Date: -- (:)
From: Richard Jones <rich@a...>
Subject: Re: [Caml-list] Dynlink problems
I still can't work out the linking problems.

http://www.annexia.org/tmp/mod_caml-0.02.tar.gz

The situation is this:

* /usr/sbin/apache is the main program, and exports symbols like
  ap_pstrdup to modules.

* mod_caml.so is my module. This is written in C & OCaml (caml_init.ml)
  and requires the OCaml Apache library to run.

* The Apache library is also written in a mix of C & OCaml, and must be
  loaded dynamically because it contains shared data structures in the C
  part.

* Plug-in OCaml programs (eg: eg_print_trans.ml) need to be dynamically
  linked with OCaml Apache lib, and access external symbols in
  /usr/sbin/apache (because these are needed by Apache).

So far I get strange errors like:

Syntax error on line 84 of /home/rich/d/merjis/test/mod_caml/test/httpd.conf:
error while linking /home/rich/d/merjis/test/mod_caml/eg_print_trans.cma.
Reference to undefined global `Callback'

I can fix that one by added stdlib.cma to the list of libraries linked
into eg_print_trans.cma, but that seems the wrong thing to do. Even
when I do this, I get:

Syntax error on line 84 of /home/rich/d/merjis/test/mod_caml/test/httpd.conf:
error while linking /home/rich/d/merjis/test/mod_caml/eg_print_trans.cma.
The external function `caml_input' is not available

.. which I haven't been able to fix because -lcamlrun is only available
as a static library (why??).

Rich.

-- 
Richard Jones. http://www.annexia.org/ http://freshmeat.net/users/rwmj
Merjis Ltd. http://www.merjis.com/ - all your business data are belong to you.
MAKE+ is a sane replacement for GNU autoconf/automake. One script compiles,
RPMs, pkgs etc. Linux, BSD, Solaris. http://www.annexia.org/freeware/makeplus/

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