+ifeq ($(CONFIG_STM32L_DISCOVERY), 1)
+ CFLAGS+=-mcpu=cortex-m3 -DCONFIG_STM32L_DISCOVERY
+else ifeq ($(CONFIG_STM32VL_DISCOVERY), 1)
+ CFLAGS+=-mcpu=cortex-m3 -DCONFIG_STM32VL_DISCOVERY=1
+else ifeq ($(CONFIG_STM32F4_DISCOVERY), 1)
+ CFLAGS+=-mcpu=cortex-m4 -DCONFIG_STM32F4_DISCOVERY=1
+endif
+ CFLAGS+=-ffreestanding -nostdlib -nostdinc