obj = bld(features = 'cxx cxxshlib')
obj.source = '''
bcf_surface.cc
+ button.cc
controls.cc
dummy_port.cc
+ fader.cc
gui.cc
interface.cc
mackie_control_protocol.cc
mackie_midi_builder.cc
mackie_port.cc
mackie_surface.cc
+ mcp_buttons.cc
meter.cc
midi_byte_array.cc
route_signal.cc