#!/usr/bin/env bash
set -e
cd buildroot
arch='x86_64'
while getopts a: OPT > /dev/null 2>&1; do
  case "$OPT" in
    a)
      arch=$OPTARG
      ;;
  esac
done
case "$arch" in
  x86_64)
    defconfig=qemu_x86_64_defconfig
    ;;
  arm)
    # qemu_arm_vexpress_defconfig required a newer QEMU than 2.0.0 on a Ubuntu host.
    # so let's stick to versatile for now.
    defconfig=qemu_arm_versatile_defconfig
    ;;
esac
for p in ../buildroot_patches/*.patch; do
    patch -N -p1 <"../buildroot_patches/${p}" || :
done
make BR2_EXTERNAL="$(pwd)/../kernel_module" "$defconfig"
# TODO Can't get rid of this for now.
# http://stackoverflow.com/questions/44078245/is-it-possible-to-use-config-fragments-with-buildroots-config
cat ../buildroot_config_fragment >> .config
# TODO there is no make host_qemu-rebuild ?
rm -f output/build/host-qemu-2.7.0/.stamp_built
env -u LD_LIBRARY_PATH make BR2_JLEVEL="$(($(nproc) - 2))" kernel_module-rebuild all
cd ..
./runqemu "$@"