export PATH=~/Your_Toolchain_PATH/ for example /alps/prebuilts/gcc/linux-x86/arm/arm-linux-androideabi-4.6/bin USE_CCACHE=1
cd kernel directory TARGET_PRODUCT=wiko export MTK_ROOT_CUSTOM=../mediatek/custom/ MTK_PATH_SOURCE=../mediatek/kernel/ MTK_PATH_PLATFORM=../mediatek/platform/mt6589/kernel/ ARCH_MTK_PLATFORM=mt6589 make
cd kernel directory TARGET_PRODUCT=s9086b export MTK_ROOT_CUSTOM=../mediatek/custom/ MTK_PATH_SOURCE=../mediatek/kernel/ MTK_PATH_PLATFORM=../mediatek/platform/mt6589/kernel/ ARCH_MTK_PLATFORM=mt6589 make