Export your toolchain PATH
	e.g.  /media/S9091/Linux/prebuilt/prebuilt/linux-x86/toolchain/arm-linux-androideabi-4.4.x/bin:$PATH

Build command:

kernel
======
	cd <kernel path>
	cp mediatek-configs out/.config
	TARGET_PRODUCT=tinnoes77_s9091 MTK_ROOT_CUSTOM=../mediatek/custom KBUILD_OUTPUT_SUPPORT=yes make O=out