Re: ltdl support for versioned symbols

[Ralf Wildenhues]

Hi Ludovic,

* Ludovic Courtès wrote on Sat, Mar 12, 2011 at 02:35:11PM CET:
> I’m thinking about adding this to ltdl:
> 
>   void *lt_dlvsym (lt_dlhandle HANDLE, const char *NAME,
>                    const char *VERSION);
> 
> On GNU systems[*], this would call ‘dlvsym’; on other systems, it would
> call ‘lt_dlsym’.

Hmmyes, maybe.

You know about copyright assignment for nontrivial additions, HACKING,
and that we love to see testsuite coverage for new features, I suppose?
;-)

> [*] Solaris ld supports symbol versioning but seems to lack ‘dlvsym’.

However, it seems to have a bit weaker way of verifying the presence of
some version in a shared library by calling dlsym (handle, version):
http://www.shrubbery.net/solaris9ab/SUNWdev/LLM/p26.html#CHAPTER5-IX522

Maybe there is a way to exploit this reduced functionality as well.
Can you test on Solaris?

>     Are there other systems that support it?

AFAIK not, but I haven't checked specifically.

Cheers,
Ralf