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Diffstat (limited to 'lib')
| -rw-r--r-- | lib/spack/docs/gpu_configuration.rst | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/lib/spack/docs/gpu_configuration.rst b/lib/spack/docs/gpu_configuration.rst index 1f807bb3b8..610431342f 100644 --- a/lib/spack/docs/gpu_configuration.rst +++ b/lib/spack/docs/gpu_configuration.rst @@ -111,3 +111,28 @@ CUDA is split into fewer components and is simpler to specify: prefix: /opt/cuda/cuda-11.0.2/ where ``/opt/cuda/cuda-11.0.2/lib/`` contains ``libcudart.so``. + + + +----------------------------------- +Using an External OpenGL API +----------------------------------- +Depending on whether we have a graphics card or not, we may choose to use OSMesa or GLX to implement the OpenGL API. + +If a graphics card is unavailable, OSMesa is recommended and can typically be built with Spack. +However, if we prefer to utilize the system GLX tailored to our graphics card, we need to declare it as an external. Here's how to do it: + + +.. code-block:: yaml + + packages: + libglx: + require: [opengl] + opengl: + buildable: false + externals: + - prefix: /usr/ + spec: opengl@4.6 + +Note that prefix has to be the root of both the libraries and the headers, using is /usr not the path the the lib. +To know which spec for opengl is available use ``cd /usr/include/GL && grep -Ri gl_version``. |