Omar Padron 573489db71 Add libglvnd packages/Add EGL support (#14572) ... * add new package: "libglvnd-frontend" * add +glvnd variant to opengl package * add +glvnd variant to mesa package * add +egl variant to paraview package * add libglvnd-frontend entries to default packages config * fix style * add default providers for glvnd virtuals add default providers for glvnd-gl, glvnd-glx, and glvnd-egl * WIP: rough start to external OpenGL documentation * rename libglvnd-frontend package and backend virtual dependencies * update documentation * fix ligvnd-be-* typos * fix libglvnd-fe package class name * fix doc parse error		2020-07-13 11:32:36 -04:00
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spack	Add libglvnd packages/Add EGL support (#14572)	2020-07-13 11:32:36 -04:00