Re: [Qemu-devel] Re: [regression] configure: add opengl detection

[Alexander Graf]

On 08.04.2011, at 23:13, Michael Walle wrote:

> Am Freitag 08 April 2011, 12:00:32 schrieb Edgar E. Iglesias:
>> On Thu, Apr 07, 2011 at 11:35:47PM +0200, Michael Walle wrote:
>>> Am Mittwoch 06 April 2011, 16:13:58 schrieb Benjamin Poirier:
>>>> Works as usual.
>>>> The problem I'm facing stems from linking to libGL and memory
>>>> protection issues. The particular system I ran this on has the binary
>>>> nvidia driver and its companion libGL.so.260.19.44. As such I'd take
>>>> no offense if we wave it off as a "problem in the unsupported binary
>>>> drivers" and I'll be satisfied configuring with no opengl on that
>>>> system.
>>> 
>>> I would also be happy with opengl disabled by default. It is only used
>>> for one hardware model (milkymist-tmu2.c) atm. I don't think its worth
>>> that this potentially breaks qemu for lots of users. What do you think?
>> 
>> I agree, FWIW I've already got a couple of reports regarding the same
>> problem.
>> 
>> Cheers
> 
> OTOH, a milkymist team member is worried that distributions would just build 
> the QEMU package with the default options and all will ship qemu-system-lm32 
> without opengl.
> 
> What do you think about disabling opengl by default except for lm32 targets?

I would really like to see some more logic behind target library requirements 
and actual linking anyway. On PPC for example, we link with libfdt to do device 
tree modifications, but link with libfdt on x86 as well when it's detected. 
Same goes for the xen libraries.

Being more clever about target requirements would certainly be useful. For now, 
I'd disable OpenGL by default though and then follow up with a patch to add the 
cleverness :).


Alex