my_list = Split(""" input.cpp config.cpp sdl.cpp sdl-joystick.cpp sdl-sound.cpp sdl-throttle.cpp sdl-video.cpp unix-netplay.cpp """) Import('env') if 'GL' in env['LIBS']: my_list.append('sdl-opengl.cpp') for x in range(len(my_list)): my_list[x] = 'drivers/sdl/' + my_list[x] Return('my_list')