1nubus_ss = ss.source_set() 2nubus_ss.add(files('nubus-device.c')) 3nubus_ss.add(files('nubus-bus.c')) 4nubus_ss.add(files('nubus-bridge.c')) 5nubus_ss.add(when: 'CONFIG_Q800', if_true: files('mac-nubus-bridge.c')) 6 7system_ss.add_all(when: 'CONFIG_NUBUS', if_true: nubus_ss) 8