# opkhelper
# lib/buildsystem/kbuild.sh
# Build system plugin for kbuild.
#
# Copyright (C) 2012  Patrick "P. J." McDermott
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

[ "x${_OH_BUILDSYSTEM_KBUILD_SM+set}" = 'xset' ] && return 0
_OH_BUILDSYSTEM_KBUILD_SM=1

_oh_kbuild_can_configure()
{
	[ -d "${_OH_BUILDSYSTEM_SOURCE_DIR}/scripts/kconfig" -a \
		-r "${_OH_BUILDSYSTEM_SOURCE_DIR}/Makefile" ]
}

_oh_kbuild_configure()
{
	return 0
}

_oh_kbuild_can_build()
{
	_oh_kbuild_can_configure
}

_oh_kbuild_build()
{
	_oh_kbuild_update_target '' "${@}"
}

_oh_kbuild_can_clean()
{
	_oh_kbuild_can_configure
}

_oh_kbuild_clean()
{
	_oh_kbuild_update_target 'clean' "${@}"
}

_oh_kbuild_can_test()
{
	return 1
}

_oh_kbuild_can_install()
{
	_oh_kbuild_can_configure
}

_oh_kbuild_install()
{
	# BusyBox uses CONFIG_PREFIX.  Linux is, of course, different.
	_oh_kbuild_update_target 'install' \
		"CONFIG_PREFIX=${_OH_BUILDSYSTEM_DESTDIR}" "${@}"
}

_oh_kbuild_update_target()
{
	local target="${1}"
	local arch=
	local rc=

	shift 1

	if ! arch="$(oh_buildsystem_arch "${OPK_HOST_ARCH}" 'kbuild')"
	then
		return 1
	fi

	mkdir -p "${_OH_BUILDSYSTEM_BUILD_DIR}"
	cd "${_OH_BUILDSYSTEM_BUILD_DIR}"

	if [ "x${_OH_BUILDSYSTEM_BUILD_TARGET}" != 'x' ]; then
		make ARCH="${arch}" CROSS_COMPILE="${OPK_TOOL_PREFIX}" \
			"${@}" "${_OH_BUILDSYSTEM_BUILD_TARGET}"
		rc=${?}
	elif [ "x${target}" != 'x' ]; then
		make ARCH="${arch}" CROSS_COMPILE="${OPK_TOOL_PREFIX}" \
			"${@}" "${target}"
		rc=${?}
	else
		make ARCH="${arch}" CROSS_COMPILE="${OPK_TOOL_PREFIX}" \
			"${@}"
		rc=${?}
	fi

	cd "${_OH_BUILDSYSTEM_WORK_AREA}"

	return ${rc}
}

_oh_kbuild_testarch()
{
	local arch="${1}"
	local rc=

	mkdir -p "${_OH_BUILDSYSTEM_BUILD_DIR}"
	cd "${_OH_BUILDSYSTEM_BUILD_DIR}"

	make -n ARCH="${arch}" help >/dev/null 2>&1
	rc=${?}

	cd "${_OH_BUILDSYSTEM_WORK_AREA}"

	return ${rc}
}