linux-compile.sh

#!/bin/bash

LINUX=linux-4.19.5

set -e
set -x

if [ -z "$THREADS" ]; then
  echo "set THREADS to the number of compilation threads"
  exit 1
fi

sudo apt-get update
sudo apt-get install -y build-essential
sudo apt-get install -y libc6-armel-cross libc6-dev-armel-cross binutils-arm-linux-gnueabi
sudo apt-get install -y gcc-arm-linux-gnueabihf g++-arm-linux-gnueabihf

# kernel build deps
sudo apt-get install -y ccache flex bison bc fakeroot libncurses5-dev libssl-dev

TARFILE=${LINUX}.tar.xz
curl https://cdn.kernel.org/pub/linux/kernel/v4.x/${TARFILE} -o ${TARFILE}
time tar xf ${TARFILE}
cd ${LINUX}

# do the cross-compile
ARCH=arm make defconfig
time ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- make -j${THREADS}