add_library(glut INTERFACE)
add_library(glut::glut ALIAS glut)
if(WIN32)
	target_include_directories(glut INTERFACE include)
	if (${CMAKE_SIZEOF_VOID_P} EQUAL 8)
		target_link_libraries(glut INTERFACE  glut64)
		target_link_directories(glut INTERFACE ${CMAKE_CURRENT_LIST_DIR}/lib/)
	else()
		target_link_libraries(glut INTERFACE  glut32)
		target_link_directories(glut INTERFACE ${CMAKE_CURRENT_LIST_DIR}/lib/)
	endif()
	get_target_property(glut_lib glut INTERFACE_LINK_LIBRARIES)
	add_custom_target( #copy the dll inside the bin dir to be able to launch the sample
		copy_glut_shared
		COMMAND ${CMAKE_COMMAND} -E make_directory ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/$<CONFIG>
		COMMAND ${CMAKE_COMMAND} -E copy
		${CMAKE_CURRENT_LIST_DIR}/dll/${glut_lib}.dll ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/$<CONFIG>
	)
	add_dependencies(glut copy_glut_shared)
else()
	find_package(GLUT)
	if(APPLE)
		target_link_options(glut INTERFACE -L/System/Library/Frameworks -framework GLUT)
	else()
		target_link_libraries(glut INTERFACE GLUT::GLUT)
	endif()
endif()