importcopyImport('RTT_ROOT')Import('rtconfig')frombuildingimport*cwd=GetCurrentDir()src=Glob('*.c')# remove no need file.ifGetDepend('RT_USING_LWIP')==False:src_need_remove=['dm9000.c']# need remove file list.SrcRemove(src,src_need_remove)ifGetDepend('RT_USING_DFS')==False:src_need_remove=['sd.c']# need remove file list.SrcRemove(src,src_need_remove)CPPPATH=[cwd]group=DefineGroup('Drivers',src,depend=[''],CPPPATH=CPPPATH)Return('group')