#!/bin/bash

oe_set_aliases()
{
	local SCRIPT="${BASH_SOURCE[0]}"
	if [ -z "${SCRIPT}" ]; then
		echo "Could not determine script location! Not using bash?"
		return
	fi
	while [ -h "${SCRIPT}" ]; do
		SCRIPT="$(readlink "${SCRIPT}")"
	done

	#
	# cf. openembedded-core/meta/conf/bitbake.conf
	#

	local TOPDIR="$(cd -P "$(dirname "${SCRIPT}")" && pwd)"

	local MACHINE="$1"
	local TUNE_PKGARCH="$2"

	local TUNE_ARCH="$3"
	local TUNE_CCARGS="$4"
	local TUNE_LDARGS=""
	local TUNE_ASARGS=""
	local LIBCEXTENSION="$5"
	local ABIEXTENSION="$6"

	# Used by multilib code to change the library paths
	local baselib="lib"

	# Path prefixes
	local base_prefix=""
	local prefix="/usr"
	local exec_prefix="/usr"

	# Base paths
	local base_bindir="${base_prefix}/bin"
	local base_sbindir="${base_prefix}/sbin"
	local base_libdir="${base_prefix}/${baselib}"

	# Architecture independent paths
	local datadir="${prefix}/share"
	local sysconfdir="${base_prefix}/etc"
	local servicedir="${base_prefix}/srv"
	local sharedstatedir="${base_prefix}/com"
	local localstatedir="${base_prefix}/var"
	local infodir="${datadir}/info"
	local mandir="${datadir}/man"
	local docdir="${datadir}/doc"

	# Architecture dependent paths
	local bindir="${exec_prefix}/bin"
	local sbindir="${exec_prefix}/sbin"
	local libexecdir="${exec_prefix}/libexec"
	local libdir="${exec_prefix}/${baselib}"
	local includedir="${exec_prefix}/include"
	local oldincludedir="${exec_prefix}/include"

	# Linkage between native layouts
	local base_bindir_native="/bin"
	local base_sbindir_native="/sbin"
	local sysconfdir_native="/etc"
	local prefix_native="/usr"
	local bindir_native="${prefix_native}/bin"
	local sbindir_native="${prefix_native}/sbin"
	local includedir_native="${prefix_native}/include"
	local libdir_native="${prefix_native}/lib"
	local base_libdir_native="/lib"
	local datadir_native="${prefix_native}/share"

	# Architecture-dependent build variables.
	local BUILD_ARCH="$(uname -m)"
	local BUILD_OS="$(uname -s | tr '[:upper:]' '[:lower:]')"
	local BUILD_VENDOR=""
	local BUILD_SYS="${BUILD_ARCH}${BUILD_VENDOR}-${BUILD_OS}"
	local BUILD_PREFIX=""
	local BUILD_CC_ARCH=""
	local BUILD_LD_ARCH=""
	local BUILD_AS_ARCH=""
	local BUILD_EXEEXT=""

	local TARGET_ARCH="${TUNE_ARCH}"
	local TARGET_OS="linux${LIBCEXTENSION}${ABIEXTENSION}"
	local TARGET_VENDOR="-oe"
	local TARGET_SYS="${TARGET_ARCH}${TARGET_VENDOR}-${TARGET_OS}"
	local TARGET_PREFIX="${TARGET_SYS}-"
	local TARGET_CC_ARCH="${TUNE_CCARGS}"
	local TARGET_LD_ARCH="${TUNE_LDARGS}"
	local TARGET_AS_ARCH="${TUNE_ASARGS}"

	local HOST_ARCH="${TARGET_ARCH}"
	local HOST_OS="${TARGET_OS}"
	local HOST_VENDOR="${TARGET_VENDOR}"
	local HOST_SYS="${HOST_ARCH}${HOST_VENDOR}-${HOST_OS}"
	local HOST_PREFIX="${TARGET_PREFIX}"
	local HOST_CC_ARCH="${TARGET_CC_ARCH}"
	local HOST_LD_ARCH="${TARGET_LD_ARCH}"
	local HOST_AS_ARCH="${TARGET_AS_ARCH}"
	local HOST_EXEEXT=""

	local PACKAGE_ARCH="${TUNE_PKGARCH}"
	local MULTIMACH_TARGET_SYS="${PACKAGE_ARCH}${TARGET_VENDOR}-${TARGET_OS}"
	local MULTIMACH_HOST_SYS="${PACKAGE_ARCH}${HOST_VENDOR}-${HOST_OS}"

	# General work and output directories for the build system.
	local TMPDIR="${TOPDIR}/tmp"

	local STAGING_DIR="${TMPDIR}/sysroots"

	local STAGING_DIR_HOST="${STAGING_DIR}/${MACHINE}"
	local STAGING_BINDIR="${STAGING_DIR_HOST}${bindir}"
	local STAGING_LIBDIR="${STAGING_DIR_HOST}${libdir}"
	local STAGING_INCDIR="${STAGING_DIR_HOST}${includedir}"
	local STAGING_DATADIR="${STAGING_DIR_HOST}${datadir}"

	local STAGING_DIR_NATIVE="${STAGING_DIR}/${BUILD_SYS}"
	local STAGING_BINDIR_NATIVE="${STAGING_DIR_NATIVE}${bindir_native}"
	local STAGING_BINDIR_CROSS="${STAGING_BINDIR}/crossscripts"
	local STAGING_BINDIR_TOOLCHAIN="${STAGING_DIR_NATIVE}${bindir_native}/${TUNE_PKGARCH}${TARGET_VENDOR}-${TARGET_OS}"

	local STAGING_DIR_TARGET="${STAGING_DIR}/${MACHINE}"

	# Toolchain info.
	local OE_PATH="${STAGING_BINDIR_TOOLCHAIN}:${STAGING_BINDIR_CROSS}:${STAGING_DIR_NATIVE}${sbindir_native}:${STAGING_BINDIR_NATIVE}:${STAGING_DIR_NATIVE}${base_sbindir_native}:${STAGING_DIR_NATIVE}/${base_bindir_native}"

	# Build utility info.
	local TOOLCHAIN_OPTIONS=" --sysroot=${STAGING_DIR_TARGET}"
	local CC="${CCACHE}${HOST_PREFIX}gcc ${HOST_CC_ARCH}${TOOLCHAIN_OPTIONS}"
	local CXX="${CCACHE}${HOST_PREFIX}g++ ${HOST_CC_ARCH}${TOOLCHAIN_OPTIONS}"
	local F77="${CCACHE}${HOST_PREFIX}g77 ${HOST_CC_ARCH}${TOOLCHAIN_OPTIONS}"
	local CPP="${HOST_PREFIX}gcc -E${TOOLCHAIN_OPTIONS} ${HOST_CC_ARCH}"
	local LD="${HOST_PREFIX}ld${TOOLCHAIN_OPTIONS} ${HOST_LD_ARCH}"
	local CCLD="${CC}"
	local AR="${HOST_PREFIX}ar"
	local AS="${HOST_PREFIX}as ${HOST_AS_ARCH}"
	local RANLIB="${HOST_PREFIX}ranlib"
	local STRIP="${HOST_PREFIX}strip"
	local OBJCOPY="${HOST_PREFIX}objcopy"
	local OBJDUMP="${HOST_PREFIX}objdump"
	local NM="${HOST_PREFIX}nm"

	local PKG_CONFIG_DIR="${STAGING_DIR_HOST}/${libdir}/pkgconfig"
	local PKG_CONFIG_PATH="${PKG_CONFIG_DIR}:${STAGING_DATADIR}/pkgconfig"
	local PKG_CONFIG_LIBDIR="${PKG_CONFIG_DIR}"
	local PKG_CONFIG_SYSROOT_DIR="${STAGING_DIR_HOST}"
	local PKG_CONFIG_DISABLE_UNINSTALLED="yes"

	local OE_ENV=" \
		BUILD_SYS=\"${BUILD_SYS}\" \
		HOST_SYS=\"${HOST_SYS}\" \
		STAGING_LIBDIR=\"${STAGING_LIBDIR}\" \
		STAGING_INCDIR=\"${STAGING_INCDIR}\" \
		PATH=\"${OE_PATH}:${PATH}\" \
		CC=\"${CC}\" \
		CXX=\"${CXX}\" \
		F77=\"${F77}\" \
		CPP=\"${CPP}\" \
		LD=\"${LD}\" \
		CCLD=\"${CCLD}\" \
		AR=\"${AR}\" \
		AS=\"${AS}\" \
		RANLIB=\"${RANLIB}\" \
		STRIP=\"${STRIP}\" \
		OBJCOPY=\"${OBJCOPY}\" \
		OBJDUMP=\"${OBJDUMP}\" \
		NM=\"${NM}\" \
		PKG_CONFIG_DIR=\"${PKG_CONFIG_DIR}\" \
		PKG_CONFIG_PATH=\"${PKG_CONFIG_PATH}\" \
		PKG_CONFIG_LIBDIR=\"${PKG_CONFIG_LIBDIR}\" \
		PKG_CONFIG_SYSROOT_DIR=\"${PKG_CONFIG_SYSROOT_DIR}\" \
		PKG_CONFIG_DISABLE_UNINSTALLED=\"${PKG_CONFIG_DISABLE_UNINSTALLED}\" \
	"

	echo "Creating shell command aliases:"
	echo "* oe_autoreconf"
	alias oe_autoreconf="${OE_ENV} autoreconf -Wcross --verbose --install --force --exclude=autopoint"

	echo "* oe_runconf"
	alias oe_runconf=" \
		./configure \
			--build=${BUILD_SYS} \
			--host=${HOST_SYS} \
			--target=${TARGET_SYS} \
			--prefix=${prefix} \
			--exec_prefix=${exec_prefix} \
			--bindir=${bindir} \
			--sbindir=${sbindir} \
			--libexecdir=${libexecdir} \
			--datadir=${datadir} \
			--sysconfdir=${sysconfdir} \
			--sharedstatedir=${sharedstatedir} \
			--localstatedir=${localstatedir} \
			--libdir=${libdir} \
			--includedir=${includedir} \
			--oldincludedir=${oldincludedir} \
			--infodir=${infodir} \
			--mandir=${mandir} \
			--with-libtool-sysroot=${STAGING_DIR_HOST} \
			${OE_ENV} \
	"

	echo "* oe_runmake"
	alias oe_runmake="make ${OE_ENV}"

	echo "* oe_env"
	alias oe_env="${OE_ENV}"

	echo "* oe_setenv"
	alias oe_setenv="export ${OE_ENV}"
}

case "$1" in
	dm800)
		oe_set_aliases $1 "mips32el-nf" "mipsel" "-mel -mabi=32 -msoft-float -march=mips32"
		;;
	dm500hd|dm7020hd|dm8000|dm800se|dm500hdv2|dm800sev2)
		oe_set_aliases $1 "mips32el" "mipsel" "-mel -mabi=32 -mhard-float -march=mips32"
		;;
	*)
		echo "Usage: source ${BASH_SOURCE[0]:-cross-compile.env} <dm500hd|dm800|dm800se|dm7020hd|dm8000|dm500hdv2|dm800sev2>"
		;;
esac