Improve installation

example-sdl/CMakeLists.txt

@@ -2,8 +2,13 @@ find_package(SDL)
 find_package(OpenGL)
 find_package(GLUT)
 
-if(SDL_FOUND)
+if(SDL_FOUND AND OPENGL_FOUND AND GLUT_FOUND)
 	include_directories(../src ${SDL_INCLUDE_DIR} ${OPENGL_INCLUDE_DIR} ${GLUT_INCLUDE_DIRS})
 	add_executable(example-sdl sdl.c)
 	target_link_libraries(example-sdl wiiuse ${SDL_LIBRARY} ${OPENGL_LIBRARIES} ${GLUT_LIBRARIES})
+	
+	if(INSTALL_EXAMPLES)
+		install(TARGETS example-sdl
+			RUNTIME DESTINATION bin COMPONENT examples)
+	endif()
 endif()