#!/bin/bash

set -e
set -o pipefail
set -u

# setup host
sudo apt install -y build-essential linux-source bc kmod cpio flex cpio libncurses5-dev 
sudo apt install -y bison libssl-dev

# install toolchain
sudo apt install -y binutils-mips64-linux-gnuabi64 gcc-mips64-linux-gnuabi64

mkdir -p download
cd download
wget http://security.debian.org/debian-security/pool/updates/main/l/linux/linux-source-4.19_4.19.67-2+deb10u2_all.deb
wget http://security.debian.org/debian-security/pool/updates/main/l/linux/linux-config-4.19_4.19.67-2+deb10u2_mips64el.deb
cd ..

dpkg -x download/linux-source-4.19_4.19.67-2+deb10u2_all.deb .
dpkg -x download/linux-config-4.19_4.19.67-2+deb10u2_mips64el.deb .

tar xf usr/src/linux-source-4.19.tar.xz 
unxz usr/src/linux-config-4.19/config.mips64el_none_5kc-malta.xz

# patch
patch -p0 -b < kconfig.patch
cp usr/src/linux-config-4.19/config.mips64el_none_5kc-malta linux-source-4.19/.config

# build
cd linux-source-4.19
make ARCH=mips CROSS_COMPILE=mips64-linux-gnuabi64- oldconfig
make ARCH=mips CROSS_COMPILE=mips64-linux-gnuabi64- KDEB_PKGVERSION=1 -j`nproc` bindeb-pkg