-cflags-$(CONFIG_M5206) := -m5200
-cflags-$(CONFIG_M5206e) := -m5200
-cflags-$(CONFIG_M520x) := -m5307
+cflags-$(CONFIG_M5206) := $(call cc-option,-mcpu=5206,-m5200)
+cflags-$(CONFIG_M5206e) := $(call cc-option,-m5206e,-m5200)
+cflags-$(CONFIG_M520x) := $(call cc-option,-mcpu=5208,-m5200)