Custom Kernel Build Script

buildLinux.sh

#!/bin/bash

set -o errexit

# Ref: http://stackoverflow.com/a/6481016
CORES=$(grep -c ^processor /proc/cpuinfo)

pushd ~/linux

make mrproper
make defconfig
# Required for systemd.
scripts/config --enable fhandle
# 1 extra thread to account for I/O waiting.
make -j$((CORES + 1))

# Now to configure our kerndev environment.
sudo umount /mnt || true
sudo mount -o loop $HOME/kerndev/rootfs.img /mnt
trap "sudo umount /mnt" EXIT

sudo make headers_install INSTALL_HDR_PATH=/mnt/usr/
sudo make modules_install INSTALL_MOD_PATH=/mnt/

# Now build a new initrd using our environment.
sudo mkinitcpio -r /mnt -k ~/linux/arch/x86/boot/bzImage -g ~/kerndev/init.img

popd