Set OpenGL preference to GLVND

This silences a CMake warning introduced in CMAKE 3.11.

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 60fff18ffb9a53da7a85698301a7840b06ea4b16..dbb9e5c6a9ab638d1e6af3e0afc0aa0a91a4d90c 100644 (file)
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -296,6 +296,7 @@ else()
                if(NOT HAIKU)
                        find_package(X11 REQUIRED)
                endif(NOT HAIKU)
+               set(OpenGL_GL_PREFERENCE "GLVND")
                find_package(OpenGL REQUIRED)
                find_package(JPEG REQUIRED)
                find_package(BZip2 REQUIRED)