export PATH:=/data/tools/toolchains/linaro-gcc-arm-none-eabi-4_9-2015q3/bin:$(PATH)
CROSS_COMPILE:=arm-none-eabi-
export CC  := $(CROSS_COMPILE)gcc
export CXX := $(CROSS_COMPILE)g++
export LD  := $(CROSS_COMPILE)gcc
export AR  := $(CROSS_COMPILE)ar
export AS  := $(CROSS_COMPILE)as
export OBJCOPY := $(CROSS_COMPILE)objcopy
export OBJDUMP := $(CROSS_COMPILE)objdump
export GDB  := $(CROSS_COMPILE)gdb
export SIZE := $(CROSS_COMPILE)size