util/crossgcc/buildgcc

#!/usr/bin/env sh
# shellcheck disable=SC2030,SC2031,SC2059
# The above line must be directly after the shebang line.
# Disables these warnings:
# 2030 - Modification of var is local (to subshell caused by pipeline).
#        shell check 0.4.6 gets confused by the read -t 1 command and interprets
#        the '1' as $1 getting modified.
# 2031 - var was modified in a subshell. That change might be lost.
#        caused by shell check bug with SC2030?  This causes any $1 from that
#        point on to be flagged.
# 2059 - Don't use variables in the printf format string. Use printf "..%s.." "$foo".
#        This is used for all of our color printing.

#
# SPDX-License-Identifier: GPL-2.0-only

cd "$(dirname "$0")" || exit 1

if [ -z "$CROSSGCC_VERSION" ]; then
	CROSSGCC_VERSION="$(git log -n 1 --pretty=%cd --date=short .)_$(git log -n 1 --pretty=%h .)"
fi

# default settings
PACKAGE=GCC
TARGETDIR=$(pwd)/xgcc
TARGETARCH=i386-elf
DEFAULT_LANGUAGES=c
LANGUAGES=
DESTDIR=
SAVETEMPS=0
BOOTSTRAP=0
THREADS=1
FETCH_ONLY=0
USE_COREBOOT_MIRROR=0
COREBOOT_MIRROR_URL="https://www.coreboot.org/releases/crossgcc-sources"

# GCC toolchain version numbers
GMP_VERSION=6.3.0
MPFR_VERSION=4.2.1
MPC_VERSION=1.3.1
GCC_VERSION=13.2.0
BINUTILS_VERSION=2.41
IASL_VERSION="R06_28_23"
# CLANG version number
CLANG_VERSION=16.0.6
CMAKE_VERSION=3.27.7
NASM_VERSION=2.16.01

# Filename for each package
GMP_ARCHIVE="gmp-${GMP_VERSION}.tar.xz"
MPFR_ARCHIVE="mpfr-${MPFR_VERSION}.tar.xz"
MPC_ARCHIVE="mpc-${MPC_VERSION}.tar.gz"
GCC_ARCHIVE="gcc-${GCC_VERSION}.tar.xz"
BINUTILS_ARCHIVE="binutils-${BINUTILS_VERSION}.tar.xz"
IASL_ARCHIVE="${IASL_VERSION}.tar.gz"
# CLANG toolchain FILE locations
LLVM_ARCHIVE="llvm-${CLANG_VERSION}.src.tar.xz"
CLANG_ARCHIVE="clang-${CLANG_VERSION}.src.tar.xz"
CRT_ARCHIVE="compiler-rt-${CLANG_VERSION}.src.tar.xz"
CTE_ARCHIVE="clang-tools-extra-${CLANG_VERSION}.src.tar.xz"
LLVMCMAKE_ARCHIVE="cmake-${CLANG_VERSION}.src.tar.xz"
CMAKE_ARCHIVE="cmake-${CMAKE_VERSION}.tar.gz"
NASM_ARCHIVE="nasm-${NASM_VERSION}.tar.bz2"

# These URLs are sanitized by the jenkins toolchain test builder, so if
# a completely new URL is added here, it probably needs to be added
# to the jenkins build as well, or the builder won't download it.

# GCC toolchain archive locations
GMP_BASE_URL="https://ftpmirror.gnu.org/gmp"
MPFR_BASE_URL="https://ftpmirror.gnu.org/mpfr"
MPC_BASE_URL="https://ftpmirror.gnu.org/mpc"
GCC_BASE_URL="https://ftpmirror.gnu.org/gcc/gcc-${GCC_VERSION}"
BINUTILS_BASE_URL="https://ftpmirror.gnu.org/binutils"
IASL_BASE_URL="https://github.com/acpica/acpica/archive/refs/tags"
# CLANG toolchain archive locations
LLVM_BASE_URL="https://github.com/llvm/llvm-project/releases/download/llvmorg-${CLANG_VERSION}"
CLANG_BASE_URL="https://github.com/llvm/llvm-project/releases/download/llvmorg-${CLANG_VERSION}"
CRT_BASE_URL="https://github.com/llvm/llvm-project/releases/download/llvmorg-${CLANG_VERSION}"
CTE_BASE_URL="https://github.com/llvm/llvm-project/releases/download/llvmorg-${CLANG_VERSION}"
LLVMCMAKE_BASE_URL="https://github.com/llvm/llvm-project/releases/download/llvmorg-${CLANG_VERSION}"
CMAKE_BASE_URL="https://cmake.org/files/v${CMAKE_VERSION%.*}"
NASM_BASE_URL="https://www.nasm.us/pub/nasm/releasebuilds/${NASM_VERSION}"

ALL_ARCHIVES="$GMP_BASE_URL/$GMP_ARCHIVE $MPFR_BASE_URL/$MPFR_ARCHIVE $MPC_BASE_URL/$MPC_ARCHIVE \
	$GCC_BASE_URL/$GCC_ARCHIVE $BINUTILS_BASE_URL/$BINUTILS_ARCHIVE $IASL_BASE_URL/$IASL_ARCHIVE \
	$LLVM_BASE_URL/$LLVM_ARCHIVE $CLANG_BASE_URL/$CLANG_ARCHIVE $LLVMCMAKE_BASE_URL/$LLVMCMAKE_ARCHIVE \
	$CRT_BASE_URL/$CRT_ARCHIVE $CTE_BASE_URL/$CTE_ARCHIVE $CMAKE_BASE_URL/$CMAKE_ARCHIVE $NASM_BASE_URL/$NASM_ARCHIVE"

# GCC toolchain directories
GMP_DIR="gmp-${GMP_VERSION}"
MPFR_DIR="mpfr-${MPFR_VERSION}"
MPC_DIR="mpc-${MPC_VERSION}"
# shellcheck disable=SC2034
GCC_DIR="gcc-${GCC_VERSION}"
# shellcheck disable=SC2034
BINUTILS_DIR="binutils-${BINUTILS_VERSION}"
IASL_DIR="acpica-${IASL_VERSION}"
# CLANG toolchain directories
LLVM_DIR="llvm-${CLANG_VERSION}.src"
CLANG_DIR="clang-${CLANG_VERSION}.src"
CRT_DIR="compiler-rt-${CLANG_VERSION}.src"
CTE_DIR="clang-tools-extra-${CLANG_VERSION}.src"
LLVMCMAKE_DIR="cmake-${CLANG_VERSION}.src"
CMAKE_DIR="cmake-${CMAKE_VERSION}"
NASM_DIR="nasm-${NASM_VERSION}"

unset MAKELEVEL MAKEFLAGS

red='\033[0;31m'
RED='\033[1;31m'
green='\033[0;32m'
GREEN='\033[1;32m'
blue='\033[0;34m'
CYAN='\033[1;36m'
NC='\033[0m' # No Color

UNAME=$(if uname | grep -iq cygwin; then echo Cygwin; else uname; fi)
HALT_FOR_TOOLS=0

hostcc()
{
	# $1 "host" or "target"
	if [ "$BOOTSTRAP" = 1 ] && [ "$1" = target ]; then
		echo "$DESTDIR$TARGETDIR/bin/gcc"
	else
		echo "$CC"
	fi
}

hostcxx()
{
	# $1 "host" or "target"
	if [ "$BOOTSTRAP" = 1 ] && [ "$1" = target ]; then
		echo "$DESTDIR$TARGETDIR/bin/g++"
	else
		echo "$CXX"
	fi
}

normalize_dirs()
{
	mkdir -p "$DESTDIR$TARGETDIR/lib"
	test -d "$DESTDIR$TARGETDIR/lib32" && mv "$DESTDIR$TARGETDIR"/lib32/* "$DESTDIR$TARGETDIR/lib"
	test -d "$DESTDIR$TARGETDIR/lib64" && mv "$DESTDIR$TARGETDIR"/lib64/* "$DESTDIR$TARGETDIR/lib"
	rm -rf "$DESTDIR$TARGETDIR/lib32" "$DESTDIR$TARGETDIR/lib64"

	perl -pi -e "s,/lib32,/lib," "$DESTDIR$TARGETDIR"/lib/*.la
	perl -pi -e "s,/lib64,/lib," "$DESTDIR$TARGETDIR"/lib/*.la
}

countdown()
{
	tout=${1:-10}

	printf "\nPress Ctrl-C to abort, Enter to continue... %2ds" "$tout"
	while [ "$tout" -gt 0 ]; do
		sleep 1
		tout=$((tout - 1))
		printf "\b\b\b%2ds" $tout
	done
	printf "\n"
}

timeout()
{
	tout=${1:-10}

	# Ignore SIGUSR1, should interrupt `read` though.
	trap false USR1
	# Clean up in case the user aborts.
	trap 'kill $counter > /dev/null 2>&1' EXIT

	(countdown "$tout"; kill -USR1 $$)&
	counter=$!

	# Some shells with sh compatibility mode (e.g. zsh, mksh) only
	# let us interrupt `read` if a non-standard -t parameter is given.
	# shellcheck disable=SC2034,SC2039,SC2162
	if echo | read -t 1 foo 2>/dev/null; then
		read -t $((tout + 1)) foo
	else
		read foo
	fi

	kill $counter > /dev/null 2>&1
	trap - USR1 EXIT
}

please_install()
{
	HALT_FOR_TOOLS=1
	# shellcheck disable=SC1091
	test -r /etc/os-release && . /etc/os-release
	# vanilla debian doesn't define `ID_LIKE`, just `ID`
	if [ -z "${ID_LIKE}" ] && [ -n "${ID}" ]; then
		ID_LIKE=${ID}
	fi
	case "$ID_LIKE" in
	debian) solution="sudo apt-get install $1" ;;
	suse) solution="sudo zypper install $1" ;;
	*) solution="using your OS packaging system" ;;
	esac

	printf "${RED}ERROR:${red} Missing tool: Please install '$1'. (eg $solution)${NC}\n" >&2
	if [ -n "$2" ]; then
		printf "${RED}ERROR:${red}               or install '$2'.${NC}\n" >&2
	fi
}

searchtool()
{
	# $1 short name
	# $2 search string
	# $3 soft fail if set
	# $4 alternative package to install on failure
	# result: file name of that tool on stdout
	#         or no output if nothing suitable was found
	search=GNU
	if [ -n "$2" ]; then
		search="$2"
	fi
	for i in "$1" "g$1" "gnu$1"; do
		if [ -x "$(command -v "$i" 2>/dev/null)" ]; then
			if [ "$(cat /dev/null | $i --version 2>&1 | grep -c "$search")" \
			    -gt 0 ]; then
				echo "$i"
				return
			fi
		fi
	done
	# A workaround for OSX 10.9 and some BSDs, whose nongnu
	# patch and tar also work.
	if [ "$UNAME" = "Darwin" ] || [ "$UNAME" = "FreeBSD" ] || [ "$UNAME" = "NetBSD" ] || [ "$UNAME" = "OpenBSD" ]; then
		if [ "$1" = "patch" ] || [ "$1" = "tar" ]; then
			if [ -x "$(command -v "$1" 2>/dev/null)" ]; then
				echo "$1"
				return
			fi
		fi
	fi
	if echo "$1" | grep -q "sum" ; then
		algor=$(echo "$1" | sed -e 's,sum,,')
		if [ -x "$(command -v "$1" 2>/dev/null)" ]; then
			#xxxsum [file]
			echo "$1"
			return
		elif [ -x "$(command -v "$algor" 2>/dev/null)" ]; then
			#xxx [file]
			echo "$algor"
			return
		elif [ -x "$(command -v openssl 2>/dev/null)" ]; then
			#openssl xxx [file]
			echo openssl "$algor"
			return
		elif [ -x "$(command -v cksum 2>/dev/null)" ]; then
			#cksum -a xxx [file]
			#cksum has special options in NetBSD. Actually, NetBSD will use the second case above.
			echo "buildgcc" | cksum -a "$algor" > /dev/null 2>/dev/null && \
			echo cksum -a "$algor"
			return
		fi
	fi

	[ -z "$3" ] && please_install "$1" "$4"
	false
}

# Run a compile check of the specified library option to see if it's installed
check_for_library() {
	LIBRARY_FLAGS="$1"
	LIBRARY_PACKAGES="$2"
	LIBTEST_FILE=.libtest

	echo "int main(int argc, char **argv) { (void) argc; (void) argv; return 0; }" > "${LIBTEST_FILE}.c"

	# shellcheck disable=SC2086
	"$CC" $CFLAGS $LIBRARY_FLAGS "${LIBTEST_FILE}.c" -o "${LIBTEST_FILE}" >/dev/null 2>&1 || \
		please_install "$LIBRARY_PACKAGES"
	rm -rf "${LIBTEST_FILE}.c" "${LIBTEST_FILE}"
}

buildcc_major() {
	echo "${GCC_VERSION}" | cut -d. -f1
}

buildcc_minor() {
	echo "${GCC_VERSION}" | cut -d. -f2
}

buildcc_version() {
	echo "${GCC_VERSION}" | cut -d. -f1-2
}

hostcc_major() {
	(echo __GNUC__ | ${CC} -E - 2>/dev/null || echo 0) | tail -1
}

hostcc_minor() {
	(echo __GNUC_MINOR__ | ${CC} -E - 2>/dev/null || echo 0) | tail -1
}

hostcc_version() {
	printf "%d.%d" "$(hostcc_major)" "$(hostcc_minor)"
}

hostcc_has_gnat1() {
	[ -x "$(${CC} -print-prog-name=gnat1)" ]
}

have_gnat() {
	hostcc_has_gnat1 && \
	searchtool gnatbind "Free Software Foundation" nofail > /dev/null
}

ada_requested() {
	echo "${LANGUAGES}" | grep -q '\<ada\>'
}

download() {
	package=$1
	# shellcheck disable=SC2086
	if [ "${USE_COREBOOT_MIRROR}" -eq 0 ]; then
		url="$(eval echo \$$package"_BASE_URL")"
	else
		url="${COREBOOT_MIRROR_URL}"
	fi

	file="$(eval echo \$$package"_ARCHIVE")"
	printf " * ${file} "

	if test -f "tarballs/${file}"; then
		printf "(cached)... "
	else
		printf "(downloading from ${url}/${file})"
		rm -f "tarballs/${file}"
		cd tarballs || exit 1
		download_showing_percentage "${url}/${file}"
		cd ..
	fi

	if [ ! -f "tarballs/${file}" ]; then
		printf "${RED}Failed to download ${file}.${NC}\n"
		exit 1
	fi
}

# Compute the hash of the package given in $1, and print it raw (just the
# hexadecimal hash).
compute_hash() {
	package=$1
	# shellcheck disable=SC2086
	file="$(eval echo \$$package"_ARCHIVE")"

	if test -z "$CHECKSUM"; then
		echo "${RED}\$CHECKSUM program missing. This is bad.${NC}" 1>&2
		exit 1
	fi

	$CHECKSUM "tarballs/$file" 2>/dev/null | sed -e 's@.*\([0-9a-f]\{40,\}\).*@\1@'
}

error_hash_missing() {
	package="$1"
	# shellcheck disable=SC2086
	file="$(eval echo \$$package"_ARCHIVE")"

	fullhashfile="util/crossgcc/sum/$file.cksum"
	printf "${RED}hash file missing:${NC}\n\n" 1>&2
	printf "Please verify util/crossgcc/tarball/$file carefully\n" 1>&2
	printf "(using PGP if possible), and then rename\n" 1>&2
	printf "        ${CYAN}${fullhashfile}.calc${NC}\n" 1>&2
	printf "     to ${CYAN}${fullhashfile}${NC}\n\n" 1>&2

	exit 1
}

# Read the known hash file of the package given in $1, and print it raw.
get_known_hash() {
	package=$1
	# shellcheck disable=SC2086
	file="$(eval echo \$$package"_ARCHIVE")"
	hashfile="sum/$file.cksum"

	if [ ! -f "$hashfile" ]; then
		calc_hash="$(compute_hash "$package")" || exit 1
		echo "$calc_hash  tarballs/$file" > "${hashfile}.calc"

		error_hash_missing "$package"
		exit 1
	fi

	sed -e 's@.*\([0-9a-f]\{40,\}\).*@\1@' < "$hashfile"
}

error_hash_mismatch() {
	package=$1
	known_hash="$2"
	computed_hash="$3"
	# shellcheck disable=SC2086
	file="$(eval echo \$$package"_ARCHIVE")"

	printf "${RED}hash mismatch:${NC}\n\n"
	printf "             expected (known) hash: $known_hash\n"
	printf "calculated hash of downloaded file: $computed_hash\n\n"

	printf "If you think this is due to a network error, please delete\n"
	printf "  ${CYAN}util/crossgcc/tarballs/$file${NC}\n"
	printf "and try again. If the problem persists, it may be due to an\n"
	printf "administration error on the file server, or you might be\n"
	printf "subject to a Man-in-the-Middle attack\n\n"

	exit 1
}

# verify_hash - Check that the hash of the file given in $1 matches the known
# hash; Bail out on mismatch or missing hash file.
verify_hash() {
	package=$1

	known_hash="$(get_known_hash "$package")" || exit "$?"
	computed_hash="$(compute_hash "$package")" || exit "$?"

	if [ "$known_hash" != "$computed_hash" ]; then
		error_hash_mismatch "$package" "$known_hash" "$computed_hash"
		exit 1
	fi

	printf "${GREEN}hash verified (${known_hash})${NC}\n"
}

unpack_and_patch() {
	package="$1"
	# shellcheck disable=SC2086
	archive="$(eval echo \$$package"_ARCHIVE")"
	# shellcheck disable=SC2086
	dir="$(eval echo \$$package"_DIR")"
	test -d "${dir}" && test -f "${dir}/.unpack_success" || (
		printf " * "$archive"\n"
		FLAGS=zxf
		suffix=$(echo "$archive" | sed 's,.*\.,,')
		if [ "$suffix" = "gz" ] && [ -n "$PIGZ" ]; then FLAGS="-I pigz -xf"
		elif [ "$suffix" = "gz" ]; then FLAGS=zxf
		elif [ "$suffix" = "bz2" ] && [ -n "$LBZIP2" ]; then FLAGS="-I lbzip2 -xf"
		elif [ "$suffix" = "bz2" ]; then FLAGS=jxf
		elif [ "$suffix" = "xz" ]; then FLAGS="--xz -xf"
		elif [ "$suffix" = "lzma" ]; then FLAGS="--lzma -xf"
		fi
		# shellcheck disable=SC2086
		$TAR $FLAGS "tarballs/$archive"
		for patch in patches/${dir}_*.patch; do
			test -r "$patch" || continue
			printf "   o $(basename "$patch")\n"
			(cd "${dir}" || exit 1; $PATCH -s -N -p1 <"../${patch}") || {
				printf "\n${RED}Failed $patch.${NC}\n"
				exit 1
			}
		done
		touch "${dir}/.unpack_success"
	)
}

fn_exists()
{
	# shellcheck disable=SC2039
	type "$1" >/dev/null 2>&1
}

is_package_enabled()
{
	echo "$PACKAGES" |grep -q "\<$1\>"
}

package_uses_targetarch()
{
	if [ "$1" = "GCC" ] || [ "$1" = "BINUTILS" ]; then
		true
	else
		false
	fi
}

generic_build()
{
	package=$1
	host_target=$2
	builddir=$3
	success=$4
	version=$5

	fn_exists "build_$package" || return

	mkdir -p "$builddir"

	if [ -f "$success" ]; then
		printf "Skipping $package v$version for $host_target as it is already built\n"
	else
		printf "Building $package v$version for $host_target ... "
		DIR="$PWD"
		cd "$builddir" || exit 1
		rm -f .failed
		"build_${package}" "$host_target" > build.log 2>&1
		cd "$DIR" || exit 1
		if [ ! -f "$builddir/.failed" ]; then
			touch "$success";
		else
			printf "${RED}failed${NC}. Check '$builddir/build.log'.\n"
			exit 1
		fi
		printf "${green}ok${NC}\n"
	fi
}

build_for_host()
{
	package="$1"
	# shellcheck disable=SC2086
	version="$(eval echo \$$package"_VERSION")"
	generic_build "$package" host "build-$package" "${DESTDIR}${TARGETDIR}/.${package}.${version}.success" "$version"
}

build_for_target()
{
	package="$1"
	# shellcheck disable=SC2086
	version="$(eval echo \$$package"_VERSION")"
	generic_build "$package" target "build-${TARGETARCH}-$package" "${DESTDIR}${TARGETDIR}/.${TARGETARCH}-${package}.${version}.success" "$version"
}

build()
{
	if package_uses_targetarch "$1"; then
		if [ $BOOTSTRAP -eq 1 ] && [ ! -f "${DESTDIR}${TARGETDIR}/.GCC.${GCC_VERSION}.success" ]; then
			build_for_host GCC
		fi
		build_for_target "$1"
	else
		build_for_host "$1"
	fi
}

exit_handler()
{
	printf "${NC}Stop\n"
	exit 1
}

cleanup()
{
	if [ $SAVETEMPS -ne 0 ]; then
		printf "Leaving temporary files around... ${green}ok${NC}\n"
		return
	fi

	printf "Cleaning up temporary files... "
	for package in $PACKAGES; do
		# shellcheck disable=SC2086
		rm -rf "build-${TARGETARCH}-$package" "build-$package" "$(eval echo \$$package"_DIR")"
	done
	rm -f getopt
	printf "${green}ok${NC}\n"
}

myhelp()
{
	printf "Usage: $0 [-V] [-c] [-p <platform>] [-d <target directory>] [-D <dest dir>] [-C] [-G] [-S]\n"
	printf "       $0 [-V|--version]\n"
	printf "       $0 [-h|--help]\n\n"

	printf "Options:\n"
	printf "    [-W|--print-version           Print machine readable version\n"
	printf "    [-V|--version]                print version number and exit\n"
	printf "    [-h|--help]                   print this help and exit\n"
	printf "    [-c|--clean]                  remove temporary files before build\n"
	printf "    [-t|--savetemps]              don't remove temporary files after build\n"
	printf "    [-y|--ccache]                 Use ccache when building cross compiler\n"
	printf "    [-n|--nocolor]                don't print color codes in output\n"
	printf "    [-u|--urls]                   print the urls for all packages\n"
	printf "    [-j|--jobs <num>]             run <num> jobs in parallel in make\n"
	printf "    [-s]--supported <tool>        print supported version of a tool\n"
	printf "    [-d|--directory <target dir>] target directory to install cross compiler to\n"
	printf "        (defaults to $TARGETDIR)\n\n"
	printf "    [-D|--destdir <dest dir>]     destination directory to install cross compiler to\n"
	printf "                                  (for RPM builds, default unset)\n"
	printf "    [-f|--fetch]                  Download tarballs, but don't build anything\n"
	printf "    [-P|--package <package>]      Build a specific package: GCC, CLANG, IASL\n"
	printf "                                  (defaults to $PACKAGE)\n"
	printf "GCC specific options:\n"
	printf "    [-b|--bootstrap]              bootstrap the host compiler before building\n"
	printf "                                  the cross compiler\n"
	printf "    [-p|--platform <platform>]    target platform to build cross compiler for\n"
	printf "                                  (defaults to $TARGETARCH)\n"
	printf "    [-l|--languages <languages>]  comma separated list of target languages\n"
	printf "                                  (defaults to $DEFAULT_LANGUAGES)\n"
	printf "Platforms for GCC:\n"
	printf "    x86_64 i386-elf i386-mingw32 riscv-elf arm aarch64\n"
	printf "    powerpc64le-linux-gnu nds32le-elf\n\n"
}

printversion() {
	printf "${blue}Welcome to the ${red}coreboot${blue} cross toolchain builder v$CROSSGCC_VERSION ${NC}\n\n"
}

myversion()
{
	printversion

	cat << EOF
Copyright (C) 2008-2010 by coresystems GmbH
Copyright (C) 2011 by Sage Electronic Engineering

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; version 2 of the License.

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.

EOF
}

have_hostcflags_from_gmp() {
	grep -q __GMP_CFLAGS "$DESTDIR$TARGETDIR/include/gmp.h" >/dev/null 2>&1
}

set_hostcflags_from_gmp() {
	# Now set CFLAGS to match GMP CFLAGS but strip out -pedantic
	# as GCC 4.6.x fails if it's there.
	HOSTCFLAGS="$(grep __GMP_CFLAGS "$DESTDIR$TARGETDIR/include/gmp.h" |cut -d\" -f2 |\
	    sed s,-pedantic,,)"
	export HOSTCFLAGS
}

build_GMP() {
	# Check if GCC enables `-pie` by default (possible since GCC 6).
	# We need PIC in all static libraries then.
	if $CC -dumpspecs 2>/dev/null | grep -q '[{;][[:space:]]*:-pie\>'
	then
		OPTIONS="$OPTIONS --with-pic"
	fi

	# shellcheck disable=SC2086
	CC="$(hostcc host)" CXX="$(hostcxx host)" \
	../${GMP_DIR}/configure \
		--disable-shared \
		--enable-fat \
		--prefix="$TARGETDIR" \
		$OPTIONS || touch .failed
	# shellcheck disable=SC2086
	$MAKE $JOBS || touch .failed
	$MAKE install DESTDIR=$DESTDIR || touch .failed

	normalize_dirs

	set_hostcflags_from_gmp
}

build_MPFR() {
	test "$UNAME" = "Darwin" && CFLAGS="$CFLAGS -force_cpusubtype_ALL"
	CC="$(hostcc host)" CXX="$(hostcxx host)" \
	../${MPFR_DIR}/configure \
		--disable-shared \
		--prefix="$TARGETDIR" \
		--infodir="$TARGETDIR/info" \
		--with-gmp="$DESTDIR$TARGETDIR" \
		CFLAGS="$HOSTCFLAGS" || touch .failed
	# shellcheck disable=SC2086
	$MAKE $JOBS || touch .failed
	$MAKE install DESTDIR=$DESTDIR || touch .failed

	normalize_dirs

	# work around build problem of libgmp.la
	if [ "$DESTDIR" != "" ]; then
	    perl -pi -e "s,$DESTDIR,," "$DESTDIR$TARGETDIR/lib/libgmp.la"
	fi
}

build_MPC() {
	CC="$(hostcc host)" CXX="$(hostcxx host)" \
	../${MPC_DIR}/configure \
		--disable-shared \
		--prefix="$TARGETDIR" \
		--infodir="$TARGETDIR/info" \
		--with-mpfr="$DESTDIR$TARGETDIR" \
		--with-gmp="$DESTDIR$TARGETDIR" \
		CFLAGS="$HOSTCFLAGS" || touch .failed

	# work around build problem of libmpfr.la
	if [ "$DESTDIR" != "" ]; then
	    perl -pi -e "s,$TARGETDIR/lib/libgmp.la,$DESTDIR\$&," "$DESTDIR$TARGETDIR/lib/libmpfr.la"
	fi

	# shellcheck disable=SC2086
	$MAKE $JOBS || touch .failed
	$MAKE install DESTDIR=$DESTDIR || touch .failed

	# work around build problem of libmpfr.la
	if [ "$DESTDIR" != "" ]; then
	    perl -pi -e "s,$DESTDIR,," "$DESTDIR$TARGETDIR/lib/libmpfr.la"
	fi

	normalize_dirs
}

build_BINUTILS() {
	if [ $TARGETARCH = "x86_64-elf" ]; then
		ADDITIONALTARGET=",i386-elf"
	fi
	# shellcheck disable=SC2086
	CC="$(hostcc target)" CXX="$(hostcxx target)" \
	../binutils-${BINUTILS_VERSION}/configure \
		--prefix="$TARGETDIR" \
		--target=${TARGETARCH} \
		--enable-targets=${TARGETARCH}${ADDITIONALTARGET} \
		--disable-werror \
		--disable-nls \
		--enable-lto \
		--enable-gold \
		--enable-multilib \
		--disable-docs \
		--disable-texinfo \
		${TARGET_BINUTILS_OPTIONS} \
		CFLAGS="$HOSTCFLAGS" \
		CXXFLAGS="$HOSTCFLAGS" || touch .failed
	# shellcheck disable=SC2086
	$MAKE $JOBS || touch .failed
	$MAKE install DESTDIR=$DESTDIR || touch .failed
}

bootstrap_GCC() {
	# shellcheck disable=SC2086
	CC="$(hostcc host)" CXX="$(hostcxx host)" \
		CFLAGS="$HOSTCFLAGS" \
		CFLAGS_FOR_BUILD="$HOSTCFLAGS" \
		CFLAGS_FOR_TARGET="$HOSTCFLAGS -fPIC" \
		CXXFLAGS="$HOSTCFLAGS" \
		CXXFLAGS_FOR_BUILD="$HOSTCFLAGS" \
		CXXFLAGS_FOR_TARGET="$HOSTCFLAGS -fPIC" \
		../gcc-${GCC_VERSION}/configure \
		--prefix="$TARGETDIR" \
		--libexecdir="$TARGETDIR/lib" \
		--enable-bootstrap \
		--disable-werror \
		--disable-nls \
		--disable-shared \
		--disable-multilib \
		--disable-libssp \
		--disable-libquadmath \
		--disable-libcc1 \
		--disable-libsanitizer \
		${GCC_OPTIONS} \
		--enable-languages="${LANGUAGES}" \
		--with-gmp="$DESTDIR$TARGETDIR" \
		--with-mpfr="$DESTDIR$TARGETDIR" \
		--with-mpc="$DESTDIR$TARGETDIR" \
		--with-pkgversion="coreboot bootstrap v$CROSSGCC_VERSION" \
		&& \
	# shellcheck disable=SC2086
	$MAKE $JOBS BOOT_CFLAGS="$HOSTCFLAGS" BUILD_CONFIG="" bootstrap && \
	$MAKE	install-gcc \
		install-target-libgcc \
		maybe-install-target-libada \
		maybe-install-target-libstdc++-v3 \
		DESTDIR=$DESTDIR || touch .failed
}

build_cross_GCC() {
	# Work around crazy code generator in GCC that confuses CLANG.
	$CC --version | grep clang >/dev/null 2>&1 && \
		CLANGFLAGS="-fbracket-depth=1024"
	[ -n "$CXX" ] && $CXX --version | grep clang >/dev/null 2>&1 && \
		CLANGCXXFLAGS="-fbracket-depth=1024"

	# GCC does not honor HOSTCFLAGS at all. CFLAGS are used for
	# both target and host object files.
	# There's a work-around called CFLAGS_FOR_BUILD and CFLAGS_FOR_TARGET
	# but it does not seem to work properly. At least the host library
	# libiberty is not compiled with CFLAGS_FOR_BUILD.
	# Also set the CXX version of the flags because GCC is now compiled
	# using C++.
	# shellcheck disable=SC2086
	CC="$(hostcc target)" CXX="$(hostcxx target)" \
		CFLAGS_FOR_TARGET="-O2 -Dinhibit_libc" \
		CFLAGS="$HOSTCFLAGS $CLANGFLAGS" \
		CFLAGS_FOR_BUILD="$HOSTCFLAGS $CLANGFLAGS" \
		CXXFLAGS="$HOSTCFLAGS $CLANGCXXFLAGS" \
		CXXFLAGS_FOR_BUILD="$HOSTCFLAGS $CLANGCXXFLAGS" \
		../gcc-${GCC_VERSION}/configure \
		--prefix="$TARGETDIR" \
		--libexecdir="$TARGETDIR/lib" \
		--target=${TARGETARCH} \
		--disable-werror \
		--disable-shared \
		--enable-lto \
		--enable-plugins \
		--enable-gold \
		--enable-ld=default \
		--disable-libssp \
		--disable-bootstrap \
		--disable-nls \
		--disable-libquadmath \
		--without-headers \
		--disable-threads \
		--enable-interwork \
		--enable-multilib \
		--enable-targets=all \
		--disable-libatomic \
		--disable-libcc1 \
		--disable-decimal-float \
		${GCC_OPTIONS} \
		${TARGET_GCC_OPTIONS} \
		--enable-languages="${LANGUAGES}" \
		--with-system-zlib \
		--with-gmp="$DESTDIR$TARGETDIR" \
		--with-mpfr="$DESTDIR$TARGETDIR" \
		--with-mpc="$DESTDIR$TARGETDIR" \
		--with-gnu-as \
		--with-gnu-ld \
		--with-pkgversion="coreboot toolchain v$CROSSGCC_VERSION" \
		&& \
	mkdir -p gcc/$TARGETARCH && \
	rm -f "gcc/$TARGETARCH/$GCC_VERSION" && \
	ln -s "$DESTDIR$TARGETDIR/$TARGETARCH/bin" "gcc/$TARGETARCH/$GCC_VERSION" && \
	$MAKE $JOBS CFLAGS_FOR_BUILD="$HOSTCFLAGS" all-gcc && \
	$MAKE install-gcc DESTDIR="$DESTDIR" || touch .failed

	if [ ! -f .failed ] && [ "$(echo $TARGETARCH | grep -c -- -mingw32)" -eq 0 ]; then
		# shellcheck disable=SC2086
		$MAKE $JOBS CFLAGS_FOR_BUILD="$HOSTCFLAGS" all-target-libgcc && \
		$MAKE install-target-libgcc DESTDIR=$DESTDIR || touch .failed
	fi
}

build_GCC() {
	if [ "$1" = host ]; then
		bootstrap_GCC "$1"
	else
		build_cross_GCC "$1"
	fi
}

build_IASL() {
	RDIR=$PWD
	cd ../$IASL_DIR/generate/unix || exit 1
	CFLAGS="$HOSTCFLAGS"
	HOST="_LINUX"
	test "$UNAME" = "Darwin" && HOST="_APPLE"
	test "$UNAME" = "FreeBSD" && HOST="_FreeBSD"
	test "$UNAME" = "Cygwin" && HOST="_CYGWIN"
	HOST="$HOST" CFLAGS="$CFLAGS" \
	OPT_CFLAGS="-O -D_FORTIFY_SOURCE=2 -D COREBOOT_TOOLCHAIN_VERSION='\"coreboot toolchain v$CROSSGCC_VERSION\"' " \
	$MAKE $JOBS CC="$(hostcc host)" iasl acpibin acpidump acpiexec acpihelp acpisrc acpixtract
	mkdir -p "$DESTDIR$TARGETDIR/bin/"
	(cd "$DESTDIR$TARGETDIR/bin" && rm -f iasl acpibin acpidump acpiexec acpihelp acpisrc acpixtract) || touch "$RDIR/.failed"
	(cd bin && cp iasl acpibin acpidump acpiexec acpihelp acpisrc acpixtract "$DESTDIR$TARGETDIR/bin") || touch "$RDIR/.failed"
}

build_LLVM() {

	ln -nsf "$LLVM_DIR" ../llvm
	ln -nsf "$CLANG_DIR" ../clang
	ln -nsf "$CTE_DIR" ../clang-tools-extra
	ln -nsf "$CRT_DIR" ../compiler-rt
	ln -nsf "$LLVMCMAKE_DIR" ../cmake

	$CMAKE -G "Unix Makefiles" \
		-DCMAKE_INSTALL_PREFIX="$DESTDIR$TARGETDIR" \
		-DCLANG_VENDOR="coreboot toolchain v$CROSSGCC_VERSION - " \
		-DLLVM_ENABLE_PROJECTS="clang;clang-tools-extra;compiler-rt" \
		-DLLVM_INCLUDE_BENCHMARKS="OFF" \
		-DLLVM_INCLUDE_TESTS="OFF" \
		-DLLVM_INCLUDE_EXAMPLES="OFF" \
		-DCMAKE_BUILD_TYPE=Release \
		-DLLVM_TARGETS_TO_BUILD="AArch64;ARM;PowerPC;RISCV;X86" \
		../llvm || touch .failed
	# shellcheck disable=SC2086
	$MAKE $JOBS || touch .failed
	$MAKE install || touch .failed

	rm -f ../llvm ../clang ../clang-tools-extra ../compiler-rt ../cmake

	cp -a ../$CLANG_DIR/tools/scan-build/* "$DESTDIR$TARGETDIR/bin"
	cp -a ../$CLANG_DIR/tools/scan-view/* "$DESTDIR$TARGETDIR/bin"
}

build_CMAKE() {
	CC="$(hostcc host)" CXX="$(hostcxx host)" CFLAGS="$HOSTCFLAGS" \
	../${CMAKE_DIR}/configure \
		--parallel=${THREADS} \
		--prefix="$TARGETDIR" || touch .failed
	# shellcheck disable=SC2086
	$MAKE $JOBS || touch .failed
	$MAKE install DESTDIR=$DESTDIR || touch .failed
}

build_NASM() {
	CC="$(hostcc host)" CXX="$(hostcxx host)" CFLAGS="$HOSTCFLAGS" \
	../${NASM_DIR}/configure \
		--prefix="$TARGETDIR" || touch .failed
	# shellcheck disable=SC2086
	$MAKE $JOBS || touch .failed
	$MAKE install DESTDIR=$DESTDIR || touch .failed

	normalize_dirs
}

print_supported() {
	case "$PRINTSUPPORTED" in
		BINUTILS|binutils)  printf "%s\n" "$BINUTILS_VERSION";;
		CLANG|clang)  printf "%s\n" "$CLANG_VERSION";;
		GCC|gcc)  printf "%s\n" "$GCC_VERSION";;
		GMP|gmp)   printf "%s\n" "$GMP_VERSION";;
		IASL|iasl) printf "%s\n" "$IASL_VERSION";;
		MPC|mpc)  printf "%s\n" "$MPC_VERSION";;
		MPFR|mpfr)  printf "%s\n" "$MPFR_VERSION";;
		NASM|nasm) printf "%s\n" "${NASM_VERSION}";;
		*) printf "Unknown tool %s\n" "$PRINTSUPPORTED";;
	esac
}

trap exit_handler 1 2 3 15

# Look if we have getopt. If not, build it.
export PATH=$PATH:.
getopt - > /dev/null 2>/dev/null || gcc -o getopt getopt.c

# parse parameters.. try to find out whether we're running GNU getopt
getoptbrand="$(getopt -V 2>/dev/null | sed -e '1!d' -e 's,^\(......\).*,\1,')"
if [ "${getoptbrand}" = "getopt" ]; then
	# Detected GNU getopt that supports long options.
	args=$(getopt -l print-version,version,help,clean,directory:,bootstrap,bootstrap-only,platform:,languages:,package:,jobs:,destdir:,savetemps,scripting,ccache,supported:,urls,nocolor,mirror,fetch -o WVhcd:bBp:l:P:j:D:tSys:unmf -- "$@")
	getopt_ret=$?
	eval set -- "$args"
else
	# Detected non-GNU getopt
	args=$(getopt WVhcd:bBp:l:P:j:D:tSys:unm $*)
	getopt_ret=$?
	# shellcheck disable=SC2086
	set -- $args
fi

if [ $getopt_ret != 0 ]; then
	myhelp
	exit 1
fi

while true ; do
        case "$1" in
		-W|--print-version)	shift; echo $CROSSGCC_VERSION; exit 0;;
		-V|--version)		shift; myversion; exit 0;;
		-h|--help)		shift; myhelp; exit 0;;
		-c|--clean)		shift; clean=1;;
		-t|--savetemps)		shift; SAVETEMPS=1;;
		-d|--directory)		shift; TARGETDIR="$1"; shift;;
		-b|--bootstrap)		shift; BOOTSTRAP=1;;
		-B|--bootstrap-only)	shift; BOOTSTRAPONLY=1; BOOTSTRAP=1;;
		-p|--platform)		shift; TARGETARCH="$1"; shift;;
		-l|--languages)		shift; LANGUAGES="$1"; shift;;
		-m|--mirror)		shift; USE_COREBOOT_MIRROR=1;;
		-D|--destdir)		shift; DESTDIR="$1"; shift;;
		-f|--fetch)		shift; FETCH_ONLY=1;;
		-j|--jobs)		shift; THREADS="$1"; JOBS="-j $1"; shift;;
		-P|--package)		shift; PACKAGE="$1"; shift;;
		-y|--ccache)		shift; USECCACHE=1;;
		-s|--supported)		shift; PRINTSUPPORTED="$1"; shift;;
		-u|--urls)		shift; printf "%s\n" "$ALL_ARCHIVES"; exit 0;;
		-n|--nocolor)		shift; \
			unset red RED green GREEN blue BLUE cyan CYAN NC;;
		--)		shift; break;;
		*)		break;;
	esac
done

if [ $# -gt 0 ]; then
	printf "Excessive arguments: $*\n"
	myhelp
	exit 1
fi

if [ -n "$PRINTSUPPORTED" ]; then
	print_supported
	exit 0
fi

#print toolchain builder version string as the header
printversion

printf "Building toolchain using %d thread(s).\n\n" "$THREADS"

case "$TARGETARCH" in
	x86_64-elf)		;;
	x86_64*)		TARGETARCH=x86_64-elf;;
	i386-elf)		;;
	i386-mingw32)		;;
	riscv-elf)		TARGETARCH=riscv64-elf
				TARGET_GCC_OPTIONS="$TARGET_GCC_OPTIONS --with-isa-spec=20191213"
				TARGET_BINUTILS_OPTIONS="$TARGET_BINUTILS_OPTIONS --with-isa-spec=20191213";;
	powerpc64*-linux*)	;;
	i386*)			TARGETARCH=i386-elf;;
	arm*)			TARGETARCH=arm-eabi;;
	aarch64*)		TARGETARCH=aarch64-elf;;
	nds32le-elf)		;;
	*)			printf "${red}WARNING: Unsupported architecture $TARGETARCH.${NC}\n\n"; ;;
esac

# Figure out which packages to build

case "$PACKAGE" in
	GCC|gcc)
		echo "Target architecture is $TARGETARCH"
		NAME="${TARGETARCH} cross GCC"
		PACKAGES="GMP MPFR MPC BINUTILS GCC"
		;;
	CLANG|clang)
		NAME="LLVM clang"
		LLVM_VERSION=${CLANG_VERSION}
		PACKAGES="CMAKE LLVM CLANG CRT CTE LLVMCMAKE"
		CMAKE=${DESTDIR}${TARGETDIR}/bin/cmake
		;;
	IASL|iasl)
		NAME="IASL ACPI compiler"
		PACKAGES=IASL
		;;
	CMAKE|cmake)
		NAME="CMake"
		PACKAGES=CMAKE
		;;
	NASM|nasm)
		NAME="NASM"
		PACKAGES=NASM
		;;
	*)
		printf "${red}ERROR: Unsupported package $PACKAGE. (Supported packages are GCC, CLANG, IASL, and NASM)${NC}\n\n";
		exit 1
		;;
esac

# Find all the required tools:

TAR=$(searchtool tar) || exit $?
PATCH=$(searchtool patch) || exit $?
MAKE=$(searchtool make) || exit $?
SHA1SUM=$(searchtool sha1sum)
#SHA512SUM=$(searchtool sha512sum)
#MD5SUM=$(searchtool md5sum)
CHECKSUM=$SHA1SUM
LBZIP2=$(searchtool lbzip2 "" nofail)
PIGZ=$(searchtool pigz "" nofail)

searchtool m4 > /dev/null
searchtool bison > /dev/null
searchtool flex flex > /dev/null
searchtool bzip2 "bzip2," > /dev/null
searchtool xz "XZ Utils" "" "xz-utils" > /dev/null

if searchtool wget "GNU" nofail > /dev/null; then
	download_showing_percentage() {
		url=$1
		printf "... ${red}  0%%"
		wget --tries=3 "$url" 2>&1 | while read -r line; do
			echo "$line" | grep -o "[0-9]\+%" | awk '{printf("\b\b\b\b%4s", $1)}'
		done
		printf "${NC}... "
	}
elif searchtool curl "^curl " > /dev/null; then
	download_showing_percentage() {
		url=$1
		echo
		curl -O --progress-bar --location --retry 3 "$url"
	}
fi

# Allow $CC override from the environment.
if [ -n "$CC" ]; then
	if [ ! -x "$(command -v "$CC" 2>/dev/null)" ]; then
		printf "${RED}ERROR:${red} CC is set to '%s' but wasn't found.${NC}\n" "$CC"
		HALT_FOR_TOOLS=1
	fi
else
	if searchtool gnatgcc "Free Software Foundation" nofail > /dev/null; then
		# gnatgcc is deprecated and in recent GCC releases its purpose is
		# fulfilled by the gcc binary. In case of a deprecated gnatgcc
		# version is installed, it doesn't provide the expected output and
		# hostcc_has_gnat1() fails. In this case, just set the value of CC
		# to gcc.
		# TODO: Remove this whole branch when time is appropriate as the
		#       second branch fulfills our needs.
		CC=gnatgcc
		if ! hostcc_has_gnat1; then
			CC=gcc
		fi
	elif searchtool gcc "Free Software Foundation" nofail > /dev/null; then
		CC=gcc
	else
		searchtool cc '^' nofail > /dev/null || please_install gcc
		CC=cc
	fi
fi

# We can leave $CXX empty if it's not set since *buildgcc* never
# calls it directly. This way configure scripts can search for
# themselves and we still override it when a bootstrapped g++ is
# to be used (cf. hostcxx()).
if [ -n "$CXX" ]; then
	if [ ! -x "$(command -v "$CXX" 2>/dev/null)" ]; then
		printf "${RED}ERROR:${red} CXX is set to '%s' but wasn't found.${NC}\n" "$CXX"
		HALT_FOR_TOOLS=1
	fi
else
	searchtool g++ "Free Software Foundation" nofail > /dev/null || \
	searchtool clang "clang version" nofail > /dev/null || \
	searchtool clang "LLVM" "" "g++" > /dev/null
fi

check_for_library "-lz" "zlib (zlib1g-dev or zlib-devel)"

if [ "$HALT_FOR_TOOLS" -ne 0 ]; then
	exit 1
fi

# This initial cleanup is useful when updating the toolchain script.

if [ "$clean" = "1" ]; then
	cleanup
fi

# Set up host compiler and flags needed for various OSes

if is_package_enabled "GCC"; then
# sane preset: let the configure script figure out things by itself
# more importantly, avoid any values that might already linger in the variable
OPTIONS="ABI="
if [ "$UNAME" = "Darwin" ]; then
	#GCC_OPTIONS="$GCC_OPTIONS --enable-threads=posix"

	# generally the OS X compiler can create x64 binaries.
	# Per default it generated i386 binaries in 10.5 and x64
	# binaries in 10.6 (even if the kernel is 32bit)
	# For some weird reason, 10.5 autodetects an ABI=64 though
	# so we're setting the ABI explicitly here.
	if [ "$(sysctl -n hw.optional.x86_64 2>/dev/null)" -eq 1 ] 2>/dev/null; then
		OPTIONS="ABI=64"
	else
		OPTIONS="ABI=32"
	fi

	# In Xcode 4.5.2 the default compiler is clang.
	# However, this compiler fails to compile gcc 4.7.x. As a
	# workaround it's possible to compile gcc with llvm-gcc.
	if $CC -v 2>&1 | grep -q LLVM; then
		CC=llvm-gcc
	fi
elif [ "$UNAME" = "Linux" ] || [ "$UNAME" = "Cygwin" ]; then
	# gmp is overeager with detecting 64bit CPUs even if they run
	# a 32bit kernel and userland.
	if [ "$(uname -m 2>/dev/null)" = "i686" ]; then
		OPTIONS="ABI=32"
	fi
elif [ "$UNAME" = "NetBSD" ]; then
	# same for NetBSD but this one reports an i386
	if [ "$(uname -m 2>/dev/null)" = "i386" ]; then
		OPTIONS="ABI=32"
	fi
fi
if [ -z "${LANGUAGES}" ]; then
	if have_gnat; then
		printf "\nFound compatible Ada compiler, enabling Ada support by default.\n\n"
		LANGUAGES="ada,${DEFAULT_LANGUAGES}"
	else
		printf "\n${red}WARNING${NC}\n"
		printf "No compatible Ada compiler (GNAT) found. You can continue without\n"
		printf "Ada support, but this will limit the features of ${blue}coreboot${NC} (e.g.\n"
		printf "native graphics initialization won't be available on most Intel\n"
		printf "boards).\n\n"

		printf "Usually, you can install GNAT with your package management system\n"
		printf "(the package is called \`gnat\` or \`gcc-ada\`). It has to match the\n"
		printf "\`gcc\` package in version. If there are multiple versions of GCC in-\n"
		printf "stalled, you can point this script to the matching version through\n"
		printf "the \`CC\` and \`CXX\` environment variables.\n\n"

		printf "e.g. on Ubuntu 14.04, if \`gcc\` is \`gcc-4.8\`:\n"
		printf "    apt-get install gnat-4.8 && make crossgcc\n\n"

		printf "on Ubuntu 16.04, if \`gcc\` is \`gcc-5\`:\n"
		printf "    apt-get install gnat-5 && make crossgcc\n"
		timeout 30
		LANGUAGES="${DEFAULT_LANGUAGES}"
	fi
fi
if [ "$BOOTSTRAP" != 1 ] && \
	{ [ "$(hostcc_major)" -lt 4 ] || \
	{ [ "$(hostcc_major)" -eq 4 ] && \
	[ "$(hostcc_minor)" -lt 9 ] ; } ; }
then
	printf "\n${red}WARNING${NC}\n"
	printf "Building coreboot requires a host compiler newer than 4.9.x while\n"
	printf "yours is $(hostcc_version).\n"
	printf "Enabling bootstrapping to provide a sufficiently new compiler:\n"
	printf "This will take significantly longer than a usual build.\n"
	printf "Alternatively you can abort now and update your host compiler.\n"
	timeout 15
	BOOTSTRAP=1
fi
if ada_requested; then
	if ! have_gnat; then
		please_install gnat gcc-ada
		exit 1
	fi
fi
fi # GCC

export HOSTCFLAGS="-Os"
if have_hostcflags_from_gmp; then
	set_hostcflags_from_gmp
fi

if [ "$USECCACHE" = 1 ]; then
	CC="ccache $CC"
fi

# Prepare target directory for building GCC
# (dependencies must be in the PATH)
mkdir -p "$DESTDIR$TARGETDIR/bin"
mkdir -p "$DESTDIR$TARGETDIR/share"
export PATH=$DESTDIR$TARGETDIR/bin:$PATH

# Download, unpack, patch and build all packages

printf "Downloading and verifying tarballs ...\n"
mkdir -p tarballs
for P in $PACKAGES; do
	download "$P" || exit "$?"
	verify_hash "$P" || exit "$?"
done
printf "Downloaded tarballs ... ${green}ok${NC}\n"

if [ ${FETCH_ONLY} -eq 1 ]; then
	exit 0
fi

printf "Unpacking and patching ...\n"
for P in $PACKAGES; do
	unpack_and_patch $P || exit 1
done
printf "Unpacked and patched ... ${green}ok${NC}\n"

if [ -n "$BOOTSTRAPONLY" ]; then
	printf "Building bootstrap compiler only ...\n"
	for pkg in GMP MPFR MPC GCC; do
		build_for_host $pkg
	done
	exit 0
fi

printf "Building packages ...\n"
for package in $PACKAGES; do
	build $package
done
printf "Packages built ... ${green}ok${NC}\n"

# Adding git information of current tree to target directory
# for reproducibility
PROGNAME=$(basename "$0")
rm -f "$DESTDIR$TARGETDIR/share/$PROGNAME-*"
cp "$PROGNAME" "$DESTDIR$TARGETDIR/share/$PROGNAME-$CROSSGCC_VERSION"

# Adding edk2 tools template
mkdir -p "$DESTDIR$TARGETDIR/share/edk2config"
sed -e "s,@@PREFIX@@,$TARGETDIR,g" edk2tools.txt > "$DESTDIR$TARGETDIR/share/edk2config/tools_def.txt"
printf "Copied EDK2 tools template ... ${green}ok${NC}\n"

cleanup

printf "\n${green}You can now run $NAME from $TARGETDIR.${NC}\n"