cmake HAS_OPENGL examples

vxl/vxl config/cmake/Modules/UseVGUI.cmake :5 

add_definitions( -DHAS_OPENGL)

InsightSoftwareConsortium/ITK Modules/ThirdParty/VNL/src/vxl/config/cmake/Modules/UseVGUI.cmake :5 

add_definitions( -DHAS_OPENGL)

qt/qtbase tests/auto/cmake/RunCMake/CMakeLists.txt :18 

list(APPEND extra_run_cmake_args "-DHAS_OPENGL=TRUE")

qt/qtbase tests/auto/cmake/RunCMake/Qt6DirConfiguration/RunCMakeTest.cmake :17 

list(APPEND cmake_opts "-DHAS_OPENGL=TRUE")