#!/bin/bash
set -e

[[ ! -d linux/ ]] && linux/ not found && exit 1
cd linux/

cp -f /boot/config-huge-* .config
# https://forums.gentoo.org/viewtopic-p-8686301.html?sid=0bbd138e7fedcec48fe7d6c5e06abbd6
make xen.config >/dev/null
echo CONFIG_X86_X32=n >> .config
make olddefconfig >/dev/null && echo KERNEL CONFIGURED
echo

[[ -z $MAKEFLAGS ]] && echo MAKEFLAGS not defined && exit 1
time nice make -j$j > ../build0slack.log && echo KERNEL BUILT
nice make -j$j modules_install > ../build0.modules.log && echo MODULES DEPLOYED
echo

file arch/x86/boot/bzImage

cat <<EOF

	mv -f /vmlinuz /vmlinuz.old
	mv -f /vmlinuz.config /vmlinuz.config.old
	cp -i linux/arch/x86/boot/bzImage /vmlinuz
	cp -i linux/.config /vmlinuz.config
	ls -lF /lib/modules/
	depmod -a

EOF