[Mesa3d-dev] Re: Adding Mesa support for 3.3.6 to XFree86

[Mike A. H. <mh...@re...>]

On Tue, 5 Jun 2001, Marcelo E. Magallon wrote:

> > For all of our XFree86 4.x releases, we have shipped XFree86 but
> > have replaced the Mesa that comes with it with the standalone
> > Mesa from the mesa3d project hacked to support DRI.
> >
> > The reason for this is that we need software OpenGL working on
> > both 4.x and 3.3.6, and DRI hardware acceleration on 4.x.
>
> Hmmm... isn't this what Brian did?  Your problem is that the 3.3.6
> server doesn't have the GLX extension.  The proper hack ;-) is to teach
> the libGL in the XFree86 4 sources about fakeglx, and I'm under the
> impression Brian did this.

Brian, can you comment on this?  If it is in fact true I'd like
to discuss it a bit deeper so that I understand what is going on
with it all.


> > There were some oddball chicken and egg dependancy problems with
> > this solution, and so we've decided instead of having a separate
> > Mesa package, to take the Mesa package and fold it into the
> > XFree86 src.rpm.
>
> ugh.

I agree.  I've successfully got it to build finally, but not
without severely evil specfile hacks.


> > Here is what would IMHO be the best - at least from my viewpoint
> > as a distributor/package maintainer:
>
> hi from one of the guys that has your job on the Debian side...

Hi.  ;o)

I don't know how Debian handles backwards compatibility with
upgrades, etc.. but that is also part of the headache for me.
Making sure nothing breaks with this.


> > The easiest method (for me) would be if the Mesa that comes with
> > XFree86 had the 3.3.6 compatibility built right into it, and was
> > perhaps an Imake directive to enable at X build time
> > (BuildMesaSupport336?).  This would make our hack unnecessary,
> > and would make package maintenance much simpler as well.  I'd
> > much rather spend my time hacking on and contributing to XFree86
> > itself than on packaging nightmares in unfamiliar turf...  ;o)
>
> Again, your problem is that Mesa in the XFree86 4 sources doesn't work
> unless the Xserver knows about the GLX extension (IOW, you'll also have

Ok.

> a problem with an XF4 server that doesn't have the GLX module
> installed).  Mesa works with 3.3.6 servers because it has a "fake" GLX
> inside it, that is, it nevers sends GLX requests to the server, but it
> handles all of that internally.

Ok, you're refering to standalone Mesa right?  Or the one
included with XFree86?  I'm assuming the former.


> And again, I think Brian already did the necessary work...  (I haven't
> really tested)

If that is true then what I am looking for above is already
implemented?  Does Mesa 3.4.2 that comes with XFree86 4.1.0
support OpenGL on 3.3.6 servers?  Brian?

If so, I can completely eliminate the separate Mesa package and
add a few more names to the people-to-buy-beer list.  ;o)



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