请教MTK平台上Option.mak文件里面的一些功能

xiaoyun2004

下面这些东西是做什么用的,根据什么来设置的?
COM_DEFS_FOR_MT6208  = MT6208
COM_DEFS_FOR_MT6205  = MT6205 __HW_DIVIDER__
COM_DEFS_FOR_MT6205B = MT6205B __HW_DIVIDER__
COM_DEFS_FOR_FPGA    = FPGA
COM_DEFS_FOR_MT6218  = MT6218  __HW_DIVIDER__
COM_DEFS_FOR_MT6218B = MT6218B __HW_DIVIDER__ MT6218B_$(strip $(CHIP_VER))
COM_DEFS_FOR_MT6217  = MT6217 __HW_DIVIDER__ MT6217_$(strip $(CHIP_VER))
COM_DEFS_FOR_MT6219  = MT6219 __HW_DIVIDER__ MT6219_$(strip $(CHIP_VER))
COM_DEFS_FOR_MT6228  = MT6228 __HW_DIVIDER__ MT6228_$(strip $(CHIP_VER))
COM_DEFS_FOR_MT6229  = MT6229 __HW_DIVIDER__ MT6229_$(strip $(CHIP_VER))
COM_DEFS_FOR_MT6238  = MT6238 __HW_DIVIDER__ MT6238_$(strip $(CHIP_VER))
COM_DEFS_FOR_MT6230  = MT6230 __HW_DIVIDER__ MT6230_$(strip $(CHIP_VER))
COM_DEFS_FOR_MT6227  = MT6227 __HW_DIVIDER__ MT6227_$(strip $(CHIP_VER))
COM_DEFS_FOR_MT6227D = MT6227D __HW_DIVIDER__ MT6227D_$(strip $(CHIP_VER))
COM_DEFS_FOR_MT6226  = MT6226 __HW_DIVIDER__ MT6226_$(strip $(CHIP_VER))
COM_DEFS_FOR_MT6226D = MT6226D __HW_DIVIDER__ MT6226D_$(strip $(CHIP_VER))
COM_DEFS_FOR_MT6226M = MT6226M __HW_DIVIDER__ MT6226M_$(strip $(CHIP_VER))
COM_DEFS_FOR_MT6225  = MT6225 __HW_DIVIDER__ MT6225_$(strip $(CHIP_VER))
COM_DEFS_FOR_MT6223  = MT6223 __HW_DIVIDER__ MT6223_$(strip $(CHIP_VER))
COM_DEFS_FOR_MT6223P  = MT6223P __HW_DIVIDER__ MT6223P_$(strip $(CHIP_VER))