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  environment to force the regeneration of configure scripts
  in every component during a make build.
  
+ o Building Gallium3D rasterizer for Mesa
+   --------------------------------------
+ 
+ The Gallium3D software rasterizer can be built to be used as an
+ alternative to the default Mesa software rasterizer. For that, use
+ the following command in the libGL build directory (the default is 
+ /usr/xenocara/lib/libGL):
+ 
+  env XENOCARA_BUILD_GALLIUM=Yes make build
+ 
+ This software rasertizer can also benefit from the LLVM infrastructure
+ and use a special pipe if it is built with LLVM support. You will need
+ to have the llvm package installed and use the following command in the
+ libGL build directory:
+ 
+  env XENOCARA_BUILD_GALLIUM=llvm make build
+ 
+ Alternatively, you can also set XENOCARA_BUILD_GALLIUM in /etc/mk.conf
+ or in your environment.
+ 
  o Cleaning in packages managed by autotools
    -----------------------------------------
  
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  See also <http://xorg.freedesktop.org/wiki/Development/Documentation/ServerDebugging>
  
  -- 
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  See also <http://xorg.freedesktop.org/wiki/Development/Documentation/ServerDebugging>
  
  -- 
! $OpenBSD: README,v 1.32 2013/04/14 10:23:04 mpi Exp $