Fix xserver build

[Aaron Plattner]

On Tue, Oct 10, 2006 at 12:38:53AM +0200, Edgar Toernig wrote:
> Hi!
> 
> I recently built xorg HEAD and got some problems.
> First, mesa HEAD has two new files (mipmap.c and
> programopt.c) which are not build by the xserver's
> makefiles resulting in missing symbols during linking.
> Adding these files to GL/mesa/main/Makefile.am
> and GL/mesa/shader/Makefile.am fixes that.
> 
> Next problem: immediate crash when starting Xorg.
> After a lot of debugging I found that not all
> files have the same idea of sizeof(Pixmap) - the
> conditional fields were missing sometimes.
> The culprit was fb/Makefile.am which does not
> pass HAVE_DIX_CONFIG_H to some files when it
> thinks the gcc has no MMX support.  I simply
> removed the "if MMX_CAPABLE/endif" as my gcc
> (3.3.5) does support MMX and the crash was gone.
> (Btw, what's the point of making the #include
> "dix-config.h" conditional?)

Aha!  I'll bet that fixes bug #8459.  Thanks for tracking that down!  I'll check
in a fix for that shortly.

-- Aaron

> I had occasional hangs with indirect rendering.
> Not really found the bug - disabling the timed
> scheduler seems to help.  Using it for two days
> now without a crash.  Accelerated direct and
> indirect rendering works fine as does xcompmgr.
> 
> But there's still one problem and it seems a
> very popular one - a google search finds
> hundreds of similar reports but not a single
> sensible reply.  All GL apps issue "libGL warning:
> 3D driver claims to not support visual 0x4b"
> and compiz can't find the texture_from_pixmap
> extension.  Some infos:
> 
> server glx version string: 1.2
> server glx extensions:
>     ..., GLX_EXT_texture_from_pixmap, ...
> client glx version string: 1.4
> client glx extensions:
>     ..., GLX_EXT_texture_from_pixmap, ...
> GLX extensions:
>     [No GLX_EXT_texture_from_pixmap - why???]
> OpenGL renderer string: Mesa DRI R200 20060602 AGP 8x x86/MMX/SSE2 NO-TCL
> OpenGL version string: 1.3 Mesa 6.5.2
>     ...
>    visual  x  bf lv rg d st colorbuffer ax dp st accumbuffer  ms  cav
>  id dep cl sp sz l  ci b ro  r  g  b  a bf th cl  r  g  b  a ns b eat
> ----------------------------------------------------------------------
> 0x23 24 tc  0 32  0 r  y  .  8  8  8  8  0 24  8  0  0  0  0  0 0 None
> ...
> 0x4b 32 tc  0 32  0 r  .  .  8  8  8  8  0  0  0  0  0  0  0  0 0 Ncon
> 
> 
> Forcing compiz to indirect rendering (LIBGL_ALWAYS_INDIRECT=1)
> (or removing the extension check) gets a little bit
> further (some graphics garbage) but it only produces
> a lot of error messages that it can't bind windows and
> pixmaps to textures.  It can be ctrl-C'ed though and
> everything turns back to normal. [1]
> 
> So, why is the GLX_EXT_texture_from_pixmap not working?
> What do I have to do so that it shows up in the GLX
> extensions section of glxinfo?
> 
> Ciao, ET.
> 
> [1] Another fruitless try was to change the "caveat" of
> visual 0x4b from Ncon to None but that just produces an
> error in libGL about depth 0 something (maybe the 0-bit
> wide depth-buffer).
> 
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