$ export ARCH=arm64
$ export CROSS_COMPILE=aarch64-none-elf-
$ export PATH=/opt/toolchains/gcc-linaro-aarch64-none-elf-4.9-2014.09_linux/bin:$PATH
$ export PATH=/opt/toolchains/gcc-linaro-arm-none-eabi-4.8-2014.04_linux/bin:$PATH
$ export JAVA_HOME=/usr/lib/jvm/java-1.7.0-openjdk-amd64
$ export PATH=$JAVA_HOME/bin:$PATH

$ source build/envsetup.sh
$ lunch odroidc2-eng-32
$ make -j4 selfinstall