#!/bin/sh
# Download and build latest version of U-Boot

DEFCONFIG="${1}" # For example "rpi_3_defconfig"
TUPLE="${2}" # For example "aarch64-linux-gnu"

set -ex

U_BOOT_GIT_URL_DEFAULT="https://gitlab.denx.de/u-boot/u-boot.git"

if [ ! -z "${U_BOOT_GIT_REV}" ]
then
	git clone --depth 1 \
	          --reference-if-able "${WORKDIR}/u-boot" \
	          --branch "${U_BOOT_GIT_REV}" \
	          "${U_BOOT_GIT_URL:-${U_BOOT_GIT_URL_DEFAULT}}" u-boot
else
	git clone --depth 1 \
	          --reference-if-able "${WORKDIR}/u-boot" \
	          "${U_BOOT_GIT_URL:-${U_BOOT_GIT_URL_DEFAULT}}" u-boot
fi

# Step into U-Boot directory
cd u-boot

# Apply patches
if [ -d "${U_BOOT_PATCHES_DIR}" ]; then
	git apply "${U_BOOT_PATCHES_DIR}"/*.patch || :
fi

# Setup ARCH
case "${TUPLE}" in
arm-*)
	export ARCH="arm"
	;;
aarch64-*)
	export ARCH="aarch64"
	;;
x86_64-*|i?86-*)
	export ARCH="x86"
	;;
*)
	echo "Can't decide \$ARCH for tuple \"${TUPLE}\""
	exit 1
	;;
esac

# CROSS_COMPILE must point to a valid compiler path prefix
export CROSS_COMPILE=$(dirname $(which "${TUPLE}-gcc"))/"${TUPLE}-"

# Build U-Boot
make ${MAKEFLAGS} "${DEFCONFIG}" && make ${MAKEFLAGS}