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Why this? The OpenGL functionality test failed! You might need to modify the include and library search paths by editing QMAKE_INCDIR_OPENGL, QMAKE_LIBDIR_OPENGL and QMAKE_LIBS_OPENGL in /home/myuser/Qt/5.5/Src/qtbase/mkspecs/linux-g++.
Hi,
Likely because you don't have the OpenGL dev libraries installed for your distribution.