On Jun 7, 2011, at 12:01 PM, Jeremy Huddleston wrote:

> So what is the proper fix here?  How should libOSMesa be getting built?
> 
> Should libmesa.a be providing those stubs (rather than my change which put 
> them in mesa/osmesa)?  Should the stubs be getting exported by libGL?  Should 
> GetHistogramEXT be exported by libGL?
> 
> Based on my understanding, it seems like we should bring these stubs into 
> libmesa.a (and remove them from mesa/xlib).  Does that sound right?

Actually... I'm perplexed about another issue here... why is libOSMesa linking 
against both libglapi and libGL?

It seems like the only things resolving into libGL are the stub symbols missing 
in libglapi.  If we provide them in osmesa, why does libOSMesa need to link 
against libGL at all?

Similarly, libOSMesa seems to build fine if I just don't include libglapi.a and 
let it resolve those calls into libGL (which it can re-export to provide the 
gl* entry points).  This of course requires libGL to be glapi-aware (which 
glx/apple isn't yet).

As is, including libglapi.a in libOSMesa and in libGL will result in two copies 
of libglapi existing in memory which seems like a recipe for disaster since 
there will be two different dispatch tables, etc.  Perhaps this isn't a problem 
on systems with flat namespaces, but on darwin, it is.

--Jeremy

_______________________________________________
mesa-dev mailing list
mesa-dev@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/mesa-dev

Reply via email to