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+# Author: Daniel F. Keefe
+# Copyright 2017,2018, Daniel F. Keefe and Regents of the University of Minnesota
+# All Rights Reserved.
+
+
+# Usage:
+# AutoBuild_use_package_OpenGL(
+# # The 1st argument is required. It is the name of the target you wish to link this dependency to.
+# my-program
+#
+# # The 2nd argument is required. It impacts how dependencies are propogated through CMake. You can treat
+# # this dependency as an INTERFACE, PUBLIC, or PRIVATE. See the following URL for details:
+# # https://cmake.org/cmake/help/latest/command/target_include_directories.html
+# PUBLIC
+# )
+#
+macro(AutoBuild_use_package_OpenGL YOUR_TARGET INTERFACE_PUBLIC_OR_PRIVATE)
+
+ message(STATUS "AutoBuild: Searching for package OpenGL...")
+
+ # Check to see if the library is already installed on the system
+ # CMake ships with FindOpenGL.cmake and in CMake 3.9+ it defines
+ # the imported targets OpenGL::GL and OpenGL::GLU. Using these is
+ # now the preferred way to link with OpenGL and all of its dependencies.
+ # See https://cmake.org/cmake/help/v3.9/module/FindOpenGL.html
+ find_package(OpenGL)
+
+ if (NOT ${OPENGL_FOUND})
+ message(FATAL_ERROR "AutoBuild: OpenGL was not found on the system. AutoBuild can auto-download
+ and build many dependencies for you, but not OpenGL. It should come pre-installed on your system.")
+ endif()
+
+ message(STATUS "AutoBuild: Ok. Found OpenGL.")
+ message(STATUS " OpenGL headers: ${OPENGL_INCLUDE_DIR}")
+ message(STATUS " OpenGL libs: ${OPENGL_LIBRARIES}")
+
+ message(STATUS "Linking target ${YOUR_TARGET} with ${INTERFACE_PUBLIC_OR_PRIVATE} dependency OpenGL::GL.")
+ target_link_libraries(${YOUR_TARGET} ${INTERFACE_PUBLIC_OR_PRIVATE} OpenGL::GL)
+
+ if (${OPENGL_GLU_FOUND})
+ message(STATUS "Linking target ${YOUR_TARGET} with ${INTERFACE_PUBLIC_OR_PRIVATE} dependency OpenGL::GLU.")
+ target_link_libraries(${YOUR_TARGET} ${INTERFACE_PUBLIC_OR_PRIVATE} OpenGL::GLU)
+ endif()
+
+ target_compile_definitions(${YOUR_TARGET} ${INTERFACE_PUBLIC_OR_PRIVATE} -DUSE_OPENGL)
+
+endmacro()