Re: Runtime detection of EA support

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David Fries wrote:
> On Wed, Jul 04, 2007 at 06:48:15PM +0200, Denis Corbin wrote:
>> My second concern is that even under Linux, I don't known how to make
>> such an on-fly dynamic linking with a third party library. I guess this
>> is not possible, as a process cannot modify its own code segment (?).
> 
> Easy actually, just see man dlopen(3).  Give it the filename which is
> the shared object, then use dlsym to lookup the address of a function,
> and call it.  It helps if the function is not a mangled C++ name.  Not
> all operating systems or platforms even support dynamically loading
> libraries.

That's sound even more simple than I thought. :-)

> 
> I'm working on two patches myself for performance improvements. 

How performace can be improved using dlopen? dynamic linking is done
once, no?

> I'm
> currently working on release 2.3.2, so I figure I'll have to port them
> to the development tree before submitting patches.

No necessarily, I can adapt it to development trunk.

>  At least I expect
> those kinds of patches to go against the development version.
> 

Yep, patch can stay available for anyone from the "patch tracker" on
sourceforge and would be merged to development version (unless the patch
fixes a bug). Thus there is no problem having the patch based on a
release version.


Kind Regards,
Denis.



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