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from building import * group = [] if not GetDepend(['RT_USING_SERIAL']): Return('group') src = [] cwd = GetCurrentDir() CPPPATH = [cwd] if GetDepend(['RT_SERIAL_EARLY_SBI']): src += ['serial-early-sbi.c'] group = DefineGroup('DeviceDrivers', src, depend = [''], CPPPATH = CPPPATH) Return('group')