Index: tools/toolchain.riscv.sh
===================================================================
--- tools/toolchain.riscv.sh	(revision a3e527caff6326ee4131067de265db6b0e5d6692)
+++ tools/toolchain.riscv.sh	(revision a3e527caff6326ee4131067de265db6b0e5d6692)
@@ -0,0 +1,431 @@
+#! /bin/bash
+
+#
+# Copyright (c) 2009 Martin Decky
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+# - Redistributions of source code must retain the above copyright
+#   notice, this list of conditions and the following disclaimer.
+# - Redistributions in binary form must reproduce the above copyright
+#   notice, this list of conditions and the following disclaimer in the
+#   documentation and/or other materials provided with the distribution.
+# - The name of the author may not be used to endorse or promote products
+#   derived from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+# IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#
+
+GMP_MAIN=<<EOF
+#define GCC_GMP_VERSION_NUM(a, b, c) \
+	(((a) << 16L) | ((b) << 8) | (c))
+
+#define GCC_GMP_VERSION \
+	GCC_GMP_VERSION_NUM(__GNU_MP_VERSION, __GNU_MP_VERSION_MINOR, __GNU_MP_VERSION_PATCHLEVEL)
+
+#if GCC_GMP_VERSION < GCC_GMP_VERSION_NUM(4, 3, 2)
+	choke me
+#endif
+EOF
+
+MPFR_MAIN=<<EOF
+#if MPFR_VERSION < MPFR_VERSION_NUM(2, 4, 2)
+	choke me
+#endif
+EOF
+
+MPC_MAIN=<<EOF
+#if MPC_VERSION < MPC_VERSION_NUM(0, 8, 1)
+	choke me
+#endif
+EOF
+
+ISL_MAIN=<<EOF
+isl_ctx_get_max_operations (isl_ctx_alloc ());
+EOF
+
+BINUTILS_VERSION="2.25.1"
+BINUTILS_RELEASE=""
+GCC_VERSION="5.3.0"
+
+BASEDIR="`pwd`"
+SRCDIR="$(readlink -f $(dirname "$0"))"
+BINUTILS="riscv-binutils-${BINUTILS_VERSION}${BINUTILS_RELEASE}.tar.bz2"
+GCC="riscv-gcc-${GCC_VERSION}.tar.bz2"
+
+REAL_INSTALL=true
+USE_HELENOS_TARGET=false
+INSTALL_DIR="${BASEDIR}/PKG"
+
+#
+# Check if the library described in the argument
+# exists and has acceptable version.
+#
+check_dependency() {
+	DEPENDENCY="$1"
+	HEADER="$2"
+	BODY="$3"
+	
+	FNAME="/tmp/conftest-$$"
+	
+	echo "#include ${HEADER}" > "${FNAME}.c"
+	echo >> "${FNAME}.c"
+	echo "int main()" >> "${FNAME}.c"
+	echo "{" >> "${FNAME}.c"
+	echo "${BODY}" >> "${FNAME}.c"
+	echo "	return 0;" >> "${FNAME}.c"
+	echo "}" >> "${FNAME}.c"
+	
+	cc -c -o "${FNAME}.o" "${FNAME}.c" 2> "${FNAME}.log"
+	RC="$?"
+	
+	if [ "$RC" -ne "0" ] ; then
+		echo " ${DEPENDENCY} not found, too old or compiler error."
+		echo " Please recheck manually the source file \"${FNAME}.c\"."
+		echo " The compilation of the toolchain is probably going to fail,"
+		echo " you have been warned."
+		echo
+		echo " ===== Compiler output ====="
+		cat "${FNAME}.log"
+		echo " ==========================="
+		echo
+	else
+		echo " ${DEPENDENCY} found"
+		rm -f "${FNAME}.log" "${FNAME}.o" "${FNAME}.c"
+	fi
+}
+
+check_dependecies() {
+	echo ">>> Basic dependency check"
+	check_dependency "GMP" "<gmp.h>" "${GMP_MAIN}"
+	check_dependency "MPFR" "<mpfr.h>" "${MPFR_MAIN}"
+	check_dependency "MPC" "<mpc.h>" "${MPC_MAIN}"
+	check_dependency "isl" "<isl/ctx.h>" "${ISL_MAIN}"
+	echo
+}
+
+check_error() {
+	if [ "$1" -ne "0" ]; then
+		echo
+		echo "Script failed: $2"
+		
+		exit 1
+	fi
+}
+
+check_md5() {
+	FILE="$1"
+	SUM="$2"
+	
+	COMPUTED="`md5sum "${FILE}" | cut -d' ' -f1`"
+	if [ "${SUM}" != "${COMPUTED}" ] ; then
+		echo
+		echo "Checksum of ${FILE} does not match."
+		
+		exit 2
+	fi
+}
+
+change_title() {
+	echo -en "\e]0;$1\a"
+}
+
+show_countdown() {
+	TM="$1"
+	
+	if [ "${TM}" -eq 0 ] ; then
+		echo
+		return 0
+	fi
+	
+	echo -n "${TM} "
+	change_title "${TM}"
+	sleep 1
+	
+	TM="`expr "${TM}" - 1`"
+	show_countdown "${TM}"
+}
+
+show_dependencies() {
+	echo "IMPORTANT NOTICE:"
+	echo
+	echo "For a successful compilation and use of the cross-compiler"
+	echo "toolchain you need at least the following dependencies."
+	echo
+	echo "Please make sure that the dependencies are present in your"
+	echo "system. Otherwise the compilation process might fail after"
+	echo "a few seconds or minutes."
+	echo
+	echo " - SED, AWK, Flex, Bison, gzip, bzip2, Bourne Shell"
+	echo " - gettext, zlib, Texinfo, libelf, libgomp"
+	echo " - GNU Make, Coreutils, Sharutils, tar"
+	echo " - GNU Multiple Precision Library (GMP)"
+	echo " - MPFR"
+	echo " - MPC"
+	echo " - integer point manipulation library (isl)"
+	echo " - native C and C++ compiler, assembler and linker"
+	echo " - native C and C++ standard library with headers"
+	echo
+}
+
+download_fetch() {
+	SOURCE="$1"
+	FILE="$2"
+	CHECKSUM="$3"
+	
+	if [ ! -f "${FILE}" ]; then
+		change_title "Downloading ${FILE}"
+		wget -c "${SOURCE}${FILE}"
+		check_error $? "Error downloading ${FILE}."
+	fi
+	
+	check_md5 "${FILE}" "${CHECKSUM}"
+}
+
+source_check() {
+	FILE="$1"
+	
+	if [ ! -f "${FILE}" ]; then
+		echo
+		echo "File ${FILE} not found."
+		
+		exit 4
+	fi
+}
+
+cleanup_dir() {
+	DIR="$1"
+	
+	if [ -d "${DIR}" ]; then
+		change_title "Removing ${DIR}"
+		echo " >>> Removing ${DIR}"
+		rm -fr "${DIR}"
+	fi
+}
+
+create_dir() {
+	DIR="$1"
+	DESC="$2"
+	
+	change_title "Creating ${DESC}"
+	echo ">>> Creating ${DESC}"
+	
+	mkdir -p "${DIR}"
+	test -d "${DIR}"
+	check_error $? "Unable to create ${DIR}."
+}
+
+check_dirs() {
+	OUTSIDE="$1"
+	BASE="$2"
+	ORIGINAL="`pwd`"
+	
+	cd "${OUTSIDE}"
+	check_error $? "Unable to change directory to ${OUTSIDE}."
+	ABS_OUTSIDE="`pwd`"
+	
+	cd "${BASE}"
+	check_error $? "Unable to change directory to ${BASE}."
+	ABS_BASE="`pwd`"
+	
+	cd "${ORIGINAL}"
+	check_error $? "Unable to change directory to ${ORIGINAL}."
+	
+	BASE_LEN="${#ABS_BASE}"
+	OUTSIDE_TRIM="${ABS_OUTSIDE:0:${BASE_LEN}}"
+	
+	if [ "${OUTSIDE_TRIM}" == "${ABS_BASE}" ] ; then
+		echo
+		echo "CROSS_PREFIX cannot reside within the working directory."
+		
+		exit 5
+	fi
+}
+
+unpack_tarball() {
+	FILE="$1"
+	DESC="$2"
+	
+	change_title "Unpacking ${DESC}"
+	echo " >>> Unpacking ${DESC}"
+	
+	case "${FILE}" in
+		*.gz)
+			tar -xzf "${FILE}"
+			;;
+		*.xz)
+			tar -xJf "${FILE}"
+			;;
+		*.bz2)
+			tar -xjf "${FILE}"
+			;;
+		*)
+			check_error 1 "Don't know how to unpack ${DESC}."
+			;;
+	esac
+	check_error $? "Error unpacking ${DESC}."
+}
+
+prepare() {
+	show_dependencies
+	check_dependecies
+	show_countdown 10
+	
+	BINUTILS_SOURCE="http://gist.decky.cz/"
+	GCC_SOURCE="http://gist.decky.cz/"
+	
+	download_fetch "${BINUTILS_SOURCE}" "${BINUTILS}" "62a8b269139e9625a23dc3174809edfa"
+	download_fetch "${GCC_SOURCE}" "${GCC}" "aaf5fa585a3328509c23ef6fbfba78fb"
+}
+
+set_target_from_platform() {
+	case "$1" in
+		"riscv64")
+			LINUX_TARGET="riscv64-unknown-linux-gnu"
+			HELENOS_TARGET="riscv64-helenos"
+			;;
+		*)
+			check_error 1 "No target known for $1."
+			;;
+	esac
+}
+
+build_target() {
+	PLATFORM="$1"
+	# This sets the *_TARGET variables
+	set_target_from_platform "$PLATFORM"
+	if $USE_HELENOS_TARGET; then
+		TARGET="$HELENOS_TARGET"
+	else
+		TARGET="$LINUX_TARGET"
+	fi
+	
+	WORKDIR="${BASEDIR}/${PLATFORM}"
+	BINUTILSDIR="${WORKDIR}/binutils-${BINUTILS_VERSION}"
+	GCCDIR="${WORKDIR}/gcc-${GCC_VERSION}"
+	OBJDIR="${WORKDIR}/gcc-obj"
+	
+	if [ -z "${CROSS_PREFIX}" ] ; then
+		CROSS_PREFIX="/usr/local/cross"
+	fi
+	if [ -z "${CROSS_HELENOS_PREFIX}" ] ; then
+		CROSS_HELENOS_PREFIX="/usr/local/cross-helenos"
+	fi
+	
+	if $USE_HELENOS_TARGET; then
+		PREFIX="${CROSS_HELENOS_PREFIX}/${PLATFORM}"
+	else
+		PREFIX="${CROSS_PREFIX}/${PLATFORM}"
+	fi
+	
+	echo ">>> Downloading tarballs"
+	source_check "${BASEDIR}/${BINUTILS}"
+	source_check "${BASEDIR}/${GCC}"
+	
+	echo ">>> Removing previous content"
+	$REAL_INSTALL && cleanup_dir "${PREFIX}"
+	cleanup_dir "${WORKDIR}"
+	
+	$REAL_INSTALL && create_dir "${PREFIX}" "destination directory"
+	create_dir "${OBJDIR}" "GCC object directory"
+	
+	check_dirs "${PREFIX}" "${WORKDIR}"
+	
+	echo ">>> Unpacking tarballs"
+	cd "${WORKDIR}"
+	check_error $? "Change directory failed."
+	
+	unpack_tarball "${BASEDIR}/${BINUTILS}" "binutils"
+	unpack_tarball "${BASEDIR}/${GCC}" "GCC"
+	
+	echo ">>> Processing binutils (${PLATFORM})"
+	cd "${BINUTILSDIR}"
+	check_error $? "Change directory failed."
+	
+	change_title "binutils: configure (${PLATFORM})"
+	CFLAGS=-Wno-error ./configure \
+		"--target=${TARGET}" \
+		"--prefix=${PREFIX}" "--program-prefix=${TARGET}-" \
+		--disable-nls --disable-werror
+	check_error $? "Error configuring binutils."
+	
+	change_title "binutils: make (${PLATFORM})"
+	make all
+	check_error $? "Error compiling binutils."
+	
+	change_title "binutils: install (${PLATFORM})"
+	if $REAL_INSTALL; then
+		make install
+	else
+		make install "DESTDIR=${INSTALL_DIR}"
+	fi
+	check_error $? "Error installing binutils."
+	
+	
+	echo ">>> Processing GCC (${PLATFORM})"
+	cd "${OBJDIR}"
+	check_error $? "Change directory failed."
+	
+	change_title "GCC: configure (${PLATFORM})"
+	PATH="$PATH:${INSTALL_DIR}/${PREFIX}/bin" "${GCCDIR}/configure" \
+		"--target=${TARGET}" \
+		"--prefix=${PREFIX}" "--program-prefix=${TARGET}-" \
+		--with-gnu-as --with-gnu-ld --disable-nls --disable-threads \
+		--enable-languages=c,objc,c++,obj-c++ \
+		--disable-multilib --disable-libgcj --without-headers \
+		--disable-shared --enable-lto --disable-werror
+	check_error $? "Error configuring GCC."
+	
+	change_title "GCC: make (${PLATFORM})"
+	PATH="${PATH}:${PREFIX}/bin:${INSTALL_DIR}/${PREFIX}/bin" make all-gcc
+	check_error $? "Error compiling GCC."
+	
+	change_title "GCC: install (${PLATFORM})"
+	if $REAL_INSTALL; then
+		PATH="${PATH}:${PREFIX}/bin" make install-gcc
+	else
+		PATH="${PATH}:${INSTALL_DIR}/${PREFIX}/bin" make install-gcc "DESTDIR=${INSTALL_DIR}"
+	fi
+	check_error $? "Error installing GCC."
+	
+	
+	cd "${BASEDIR}"
+	check_error $? "Change directory failed."
+	
+	echo ">>> Cleaning up"
+	cleanup_dir "${WORKDIR}"
+	
+	echo
+	echo ">>> Cross-compiler for ${TARGET} installed."
+}
+
+while [ "$#" -gt 1 ]; do
+	case "$1" in
+		--no-install)
+			REAL_INSTALL=false
+			shift
+			;;
+		--helenos-target)
+			USE_HELENOS_TARGET=true
+			shift
+			;;
+		*)
+			show_usage
+			;;
+	esac
+done
+
+prepare
+build_target riscv64