Re: [Xen-devel] ocaml bindings

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 03/04/13 20:24, AL13N wrote:
> Op woensdag 3 april 2013 20:18:53 schreef AL13N:
>> Op woensdag 3 april 2013 18:12:21 schreef Andrew Cooper:
>>> On 03/04/13 18:03, AL13N wrote:
>>>> i'm the Mageia Xen package maintainer, and a user reported that i had
>>>> missing symbols in my ocaml bindings:
>>>>
>>>> https://bugs.mageia.org/show_bug.cgi?id=5199
>>>>
>>>> i'm using Xen 4.2.1 and ocaml 3.12.1
>>>>
>>>> the problem is that if you just to a simple hello world and you're using
>>>> certain bindings (eg: xeneventch): you get missing symbols. (others
>>>> appear
>>>> to be fine).
>>>>
>>>> I know next to nothing about ocaml, and it could be my build process,
>>>> but
>>>> i
>>>> kinda need some help about this.
>>>>
>>>> this is my spec file:
>>>> http://svnweb.mageia.org/packages/cauldron/xen/current
>>>>
>>>> Thanks in advance
>>>>
>>>> PS: we're at version freeze and release freeze is pretty soon :-S
>>> This is because the ocaml tools embed the build target links in the
>>> generated libs.  If you try to link against them later outside the build
>>> environment, it will break.
>>>
>>> Attached is the patch used to fix this problem for XenServer for Xen 4.2.
>> thanks alot for the very quick help, i'm testing right now...
> it seems the tests definately improve things...
>
> [root@localhost ~]# cat testfile.ml
> print_string "hello"
> [root@localhost ~]# ocamlfind ocamlc -o test -thread -package xeneventchn -
> linkpkg -g testfile.ml
> [root@localhost ~]# ./test
> Fatal error: cannot load shared library dllxeneventchn_stubs
> Reason: dllxeneventchn_stubs.so: cannot open shared object file: No such file 
> or 
> directory
>
>
> (i have no idea if i need to ./test execute this, or if this is normal 
> behavior)

You presumably need tools/ocaml/libs/eventchn/dllxeneventchn_stubs.so on
your load path.  Under my system, would be installed to
/usr/local/lib/ocaml/3.11.2/xeneventchn/dllxeneventchn_stubs.so

>
> one more thing:
>
> [root@localhost ~]# cat /usr/lib64/ocaml/xenlight/META
> version = "4.1"
> description = "Xen Toolstack Library"
> archive(byte) = "xl.cma"
> archive(native) = "xl.cmxa"
>
> it should be xenlight.cma
>
> (the others are fine)

Looks like it is still broken upstream.  I will submit another patch.

>
>
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