So, this tutorial assumes that we are building the linux kernel 3.x for ARM architecture (aarch64)

1. Kernel source: 
    `git clone https://gem5.googlesource.com/arm/linux-arm64-legacy`
2. Version tags:
    ```shell
    (cd linux-arm64-legacy && f=`git rev-parse --git-dir`/hooks/commit-msg ; curl -Lo $f https://gerrit-review.googlesource.com/tools/hooks/commit-msg ; chmod +x $f)
    ```
3. What I did:
    `git checkout -b hegi`

I presume you have qemu installed with aarch64-static. 1. gcc-4.8: this version of kernel is old so it needs old gcc which is silly, but that’s the only way I got it to work. No idea to what date this package would be supported: sudo apt-get install gcc-4.8-aarch64-linux-gnu 2. Switch to aarch64-gnu-gcc-4.8 by modifying the soft link. Samething applies for cpp and nm-gcc (we have a shell script that does this)

This step is pretty easy if all configurations are well made.

From within the kernel directory run:

make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- gem5_defconfig

make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- -j 4

location of this readme: /mnt/ftpw/ftpw/docker/ufs/home/shashank/project/ARM_LINUX/kernel_sandbox