How to compile:
1. Export your toolchain path
2. CD into kernel directory
3. make sprout_defconfig
4. make or make -j n (replace 'n' with number of jobs at a time, eg: make -j 2)
5. Unpack your stock boot.img and replace the zImage with new zImage and repack
6. Have fun
How to export toolchain path (using .bashrc):
1. Open terminal
2. Type pluma ~/.bashrc or you can use gedit (eg: gedit ~/.bashrc) or anyother
3. Add these lines to .bashrc
export ARCH=arm
export CCOMPILE=$CROSS_COMPILE
export CROSS_COMPILE=your toolchain (eg: arm-cortex_a7-linux-gnueabihf-)
export PATH=$PATH: your toolchain loaction (eg: /home/anoopkumar/android/toolchains/arm-cortex_a7-linux-gnueabihf-linaro_4.9/bin)
How to unpack/repack boot.img
1. Download xiaolu's mkbootimg tool form here https://github.com/xiaolu/mkbootimg_tools and extract it
2. Copy and paste stock boot.img into mkbootimg_tools folder
3. Open terminal then cd into mkbootimg_tools folder
4. Unpack booti.mg using this command ./mkboot boot.img boot
5. Repalce the old zImage inside the boot folder with your new zImage
6. Repack boot.img uisng this command ./mkboot boot boot_new.img