From readme:
Kernel Build
- Uncompress using following command at the android directory
- When you compile the kernel source code, you have to add google original prebuilt source(toolchain) into the android directory.
- Run following scripts to build kernel a) cd kernel c) make ARCH=arm CROSS_COMPILE=../prebuilts/gcc/linux-x86/arm/arm-eabi-4.7/bin/arm-eabi- f70n_global_com_defconfig zImage
- After build, you can find the build image(zImage) at arch/arm/boot
NOTE: This is official source kernel from LG dev for D315n (LG F70) device