#!@@SH@@
#
# opkbuild
# src/ob-buildenv
# Set up build environment.
#
# 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/>.

. '@@LIBOPKBUILD@@/load.sm'

ob_use locale
ob_use output
ob_use package
ob_use deps

main()
{
	ob_set_text_domain 'opkbuild'

	ob_init_package '..'
	ob_parse_package_metadata -c '.opkbuild.cache'

	ob_info "$(ob_get_msg 'setup_build_env')"

	setup_build_helper
	setup_toolchain
	setup_build_flags
}

setup_build_helper()
{
	IFS=', '
	for dep in $(ob_get_source_parameter 'Build-Depends'); do
		unset IFS
		ob_parse_dep -p dep_pkg "${dep}" >/dev/null
		helper="$(ob_get_system_path 'build-helper' "${dep_pkg}")"
		if [ ${?} -eq 0 ]; then
			printf "PATH='%s:%s'\n" "${PATH}" "${helper}"
		fi
	done
	unset IFS
}

setup_toolchain()
{
	# This check is done to allow at least native building on unsupported OSes.
	# It may be removed in the future.
	if [ "${OPK_BUILD_ARCH}" != "${OPK_HOST_ARCH}" ]; then
		tool_prefix="${OPK_HOST_ARCH}-"
	else
		tool_prefix=''
	fi

	# Set toolchain environment variables.
	# NB: This is written for GNU Binutils and GCC and won't work for, e.g.,
	# LLVM.
	cat <<EOF
AR='${tool_prefix}ar'
AS='${tool_prefix}as'
CC='${tool_prefix}gcc'
CPP='${tool_prefix}cpp'
CXX='${tool_prefix}g++'
LD='${tool_prefix}ld'
NM='${tool_prefix}nm'
OBJCOPY='${tool_prefix}objcopy'
OBJDUMP='${tool_prefix}objdump'
RANLIB='${tool_prefix}ranlib'
READELF='${tool_prefix}readelf'
SIZE='${tool_prefix}size'
STRINGS='${tool_prefix}strings'
STRIP='${tool_prefix}strip'
EOF
}

setup_build_flags()
{
	build_flags="$(ob_get_system_path 'buildflags' "${OPK_HOST_ARCH}")"
	if [ -r "${build_flags}" ]; then
		. "${build_flags}"
	fi
}

main "${@}"