ex_setup_env() {

	local __;

	set -o noglob;

	if [ -z "${DEFAULT_BUILD_CPUS}" ]\

	&& [ -e /proc/cpuinfo ]; then

		DEFAULT_BUILD_CPUS=$(awk '/^processor/{cpus++} END{print cpus}' /proc/cpuinfo);

	fi;

	: ${ARCH:=nt64}; : ${BUILD:=debug};

	if [ "${ARCH}" = nt32 ]; then

		TARGET="i686-nt32-midipix";

	elif [ "${ARCH}" = nt64 ]; then

		TARGET="x86_64-nt64-midipix";

	else

		if [ "${BUILD}" != debug ]\

		&& [ "${BUILD}" != release ]; then

			ex_log_msg failexit "Error: unknown build type \`${BUILD}'.";

		fi;

		ex_log_msg failexit "Error: invalid architecture \`${ARCH}'.";

	fi;

	for __ in ${HOME}/midipix_build.vars ../midipix_build.vars ./vars/env.vars ./vars/build.vars; do

		[ -e ${__} ] && . ${__};

	done;

	export PATH="${PREFIX}/bin${PATH:+:${PATH}}";

	if [ ${ARG_IPV4_ONLY:-0} -eq 1 ]; then

		DEFAULT_WGET_ARGS="-4${DEFAULT_WGET_ARGS:+ ${DEFAULT_WGET_ARGS}}";

	elif [ ${ARG_IPV6_ONLY:-0} -eq 1 ]; then

		DEFAULT_WGET_ARGS="-6${DEFAULT_WGET_ARGS:+ ${DEFAULT_WGET_ARGS}}";

	fi;

	for __ in $(export | sed -e 's/^export //' -e 's/=.*$//'); do

		if ! ex_lmatch "${CLEAR_ENV_VARS_EXCEPT}" " " "${__}"; then

			unset "${__}";

		fi;

	done;

};

# vim:filetype=sh