Import('RTT_ROOT') Import('rtconfig') from building import * cwd = os.path.join(str(Dir('#')), 'drivers') # add the general drivers. src = Split(""" board.c stm32l4xx_it.c stm32l4xx_nucleo.c usart.c """) CPPPATH = [cwd] group = DefineGroup('Drivers', src, depend = [''], CPPPATH = CPPPATH) Return('group')