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Re: ltdl support for versioned symbols

From: Ralf Wildenhues
Subject: Re: ltdl support for versioned symbols
Date: Sat, 12 Mar 2011 20:46:42 +0100
User-agent: Mutt/1.5.20 (2010-08-04)

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):

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.


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