Linux: default linkage to legacy OpenGL (libGL.so) library #410
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Modern CMake (and when I initially wrote the CMakeLists) prefers GLVND, which is a fancy way to dispatch OpenGL calls over multiple different client libraries. However that does not work with the ancient (<=340.xx) nvidia binary linux drivers, which still assume that there can be only one libGL.so on a linux system. Even if the GLVND libraries are available on the target system, there will not be any GL output since the client library does not understand the GLVND dispatches, resulting in black screens. Fix this by explicitly requesting CMake to prefer the legacy OpenGL linkage approach. Fixes #395 Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
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I'm going to solve this differently, without build-time dynamic linking to libGL. |
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Modern CMake (and when I initially wrote the CMakeLists) prefers GLVND, which is a fancy way to dispatch OpenGL calls over multiple different client libraries. However that does not work with the ancient (<=340.xx) nvidia binary linux drivers, which still assume that there can be only one libGL.so on a linux system.
Even if the GLVND libraries are available on the target system, there will not be any GL output since the client library does not understand the GLVND dispatches, resulting in black screens.
Fix this by explicitly requesting CMake to prefer the legacy OpenGL linkage approach.
Fixes #395 and I suspect a few other crashes as well.