[MPlayer-users] configure script patch

Rich Felker dalias at aerifal.cx
Wed Aug 17 17:17:29 CEST 2005

On Wed, Aug 17, 2005 at 07:48:43AM -0600, Kevin DeKorte wrote:
> On Wednesday 17 August 2005 01:16 am, Reimar Döffinger wrote:
> > Hi,
> >
> > On Tue, Aug 16, 2005 at 04:08:39PM -0600, Kevin DeKorte wrote:
> > > To get the configure script to properly detect the OpenGL driver with the
> > > ATI drivers installed. The following patch was needed. If mplayer is
> > > linked against libGL.a the OpenGL acceleration does not work properly.
> >
> > Rejected. libGLU is something else, and we can't depend on it, it would
> > break OpenGL on some weirder systems. Also it probably wouldn't work for
> > nVidia, since they have a libGLU.a but no libGL.a (I expect it won#t
> > even link then).
> > What does "does not work properly" mean? If it's slow your libGL.a is
> > probably a leftover from the software MesaGL, and should be deleted (and
> > you should tell ATI to move it out of the way when installing their
> > drivers). If it isn't, you should also tell ATI to fix it.
> > In any case, the right way IMHO is deleting the libGL.a
> >
> > Greetings,
> > Reimar Döffinger
> >
> Reimar,
> I removed libGL.a and re-ran configure (the stock one from mplayer) and OpenGL 
> on my system was not detected. I applied my patch that changes -lGL to -lGLU 
> and OpenGL was detected and mplayer did run with accelerated OpenGL. 
> You were correct in that the libGL.a on my system was the one from Mesa and 
> that is why OpenGL did not work properly (it was unaccellerated)
> Perhaps there could be an additional test that if detection of OpenGL fails 
> when using libGL it could be tried again with libGLU and see if that works? 
> That way it will only fall back to libGLU if needed?

Again, ATI needs to fix their broken crap. A simple ln -s libGLU.so
libGL.so (or .a, whatever) will probably do. Anyway, GL output is
slower and lower quality than normal video overlay, so why even


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