sys.path=sys.path+[os.path.join(RTT_ROOT,'tools')]frombuildingimport*TARGET='rtthread-ck802.'+rtconfig.TARGET_EXTenv=Environment(tools=['mingw'],AS=rtconfig.AS,ASFLAGS=rtconfig.AFLAGS,CC=rtconfig.CC,CCFLAGS=rtconfig.CFLAGS,CXX=rtconfig.CXX,CXXFLAGS=rtconfig.CXXFLAGS,AR=rtconfig.AR,ARFLAGS='-rc',LINK=rtconfig.LINK,LINKFLAGS=rtconfig.LFLAGS)env.PrependENVPath('PATH',rtconfig.EXEC_PATH)# add --start-group and --end-group for GNU GCCenv['LINKCOM']='$LINK -o $TARGET $LINKFLAGS $__RPATH $SOURCES $_LIBDIRFLAGS -Wl,--start-group $_LIBFLAGS -Wl,--end-group'Export('RTT_ROOT')Export('rtconfig')# prepare building environmentobjs=PrepareBuilding(env,RTT_ROOT,has_libcpu=False)# make a buildingDoBuilding(TARGET,objs)