-TOOLCHAIN = arm-none-eabi-#
+TOOLCHAIN = arm-elf-#
MCU_TARGET = cortex-m3
MCU_OPTS = -mthumb
-OPTIMIZE = -O0 -fomit-frame-pointer
+OPTIMIZE = -Os -fomit-frame-pointer
DEBUG = -gdwarf-2
WARNING = -pedantic -Wall -Wstrict-prototypes -Werror
DEFS = -D$(call uc, $(subst -,_,$(MCU_TARGET)))