config.sh

#!/bin/bash

# If target name is set, set relevant variables as appropriate
export XC_TARGET_NAME=${XC_TARGET_NAME:-}

# XC_TARGET is the target architecture for the toolchain. Depending on the
# architecture, you may need all parts of the triplet (e.g. for a Raspberry Pi
# you should set XC_TARGET to "arm-unknown-linux-gnueabihf").

# XC_KERNEL_TARGET is the kernel target architecture. The kernel has slightly
# different names for its targets, e.g. for a RPi you shoud set this to "arm"

if [ ! -z ${XC_TARGET_NAME} ]; then
  if [ "${XC_TARGET_NAME}" == "rpi1" ] || [ "${XC_TARGET_NAME}" == "rpi2" ]; then
    export XC_TARGET="arm-unknown-linux-gnueabihf"
    export XC_KERNEL_TARGET="arm"
  elif [ "${XC_TARGET_NAME}" == "rpi3" ]; then
    export XC_TARGET="arm-linux-gnueabi"
    export XC_KERNEL_TARGET="arm64"
  else
    echo "Invalid XC_TARGET_NAME: ${XC_TARGET_NAME}"
    exit 1
  fi
else
  # XC_TARGET and XC_KERNEL_TARGET must be set
  : "${XC_TARGET:?XC_TARGET not set}"
  : "${XC_KERNEL_TARGET:?XC_KERNEL_TARGET not set}"
fi

# Parallel build options
export PARALLEL_BUILDS=${PARALLEL_BUILDS:-}
export PARALLEL_MAKE=""

if [ ! -z ${PARALLEL_BUILDS} ]; then
  PARALLEL_MAKE="-j ${PARALLEL_BUILDS} --output-sync"
fi

# Prefix to use for downloading and building the toolchain, as well as
# the destination directory for the final binaries. This prefix must not
# contain spaces, otherwise the build will fail (this is due to the
# binutils makefiles and nothing to do with this build script). Do not
# specify an existing directory for the prefix as it will be deleted
# each time you do a full rebuild.
export XC_PREFIX="${PWD}/xc-${XC_TARGET}"

# Don't edit these configuration variables.
export XC_TARBALL_DIR="${PWD}/src"
export XC_TMP_DIR="${XC_PREFIX}/${XC_TARGET}/tmp"
export XC_HEADER_DIR="${XC_PREFIX}/${XC_TARGET}"
export PATH="${XC_PREFIX}/bin:${PATH}"

# GNU (binutils, GCC + dependencies) and Sourceware (newlib) URLs. You can
# change these to a local mirror if required.
export GNU_BASE_URL="https://ftpmirror.gnu.org"
export SOURCEWARE_BASE_URL="ftp://sourceware.org/pub"
export KERNEL_BASE_URL="https://www.kernel.org/pub/linux/kernel"
export GCC_BASE_URL="ftp://gcc.gnu.org/pub/gcc"

# Version numbers for the relevant components of the toolchain. Not all
# version combinations have been tested. Unless you need a feature in
# a later version, do not edit these options.
export BINUTILS_VERSION="2.34"

# Kernel headers are required for glibc
# Generally it is best to choose the latest stable release
export KERNEL_VERSION_MAJOR="5"
export KERNEL_VERSION_MINOR="7.9"
export KERNEL_VERSION="${KERNEL_VERSION_MAJOR}.${KERNEL_VERSION_MINOR}"

export GLIBC_VERSION="2.31"

# The GCC version number should be in the same minor series as your host
# compiler. For example, if your host has GCC 4.9.1, you can probably set
# GCC_VERSION to the latest version of the 4.9.x series, but you should not
# set it to 5.x.
export GCC_VERSION=${GCC_VERSION:-"9.3.0"}
export GCC_LANGS="c,c++"

export MPFR_VERSION="4.1.0"
export MPC_VERSION="1.0.3"

export GMP_VERSION="6.2.0"
export GMP_VERSION_MINOR=""

export ISL_VERSION="0.18"
export CLOOG_VERSION="0.18.1"

export GLOBAL_CONFIGURE_OPTIONS=(
  "--target=${XC_TARGET}"
  "--disable-multilib"
  "--disable-werror"
  "--disable-threads"
)

# You should not need to edit any of the following variables unless the build
# process fails.
export GNU_GPG_KEYRING_FILENAME="gnu-keyring.gpg"
export GNU_GPG_KEYRING_URL="${GNU_BASE_URL}/${GNU_GPG_KEYRING_FILENAME}"
export GNU_GPG_KEYRING_PATH="${XC_TARBALL_DIR}/${GNU_GPG_KEYRING_FILENAME}"

export BINUTILS_FILENAME="binutils-${BINUTILS_VERSION}.tar.bz2"
export BINUTILS_URL="${GNU_BASE_URL}/binutils/${BINUTILS_FILENAME}"
export BINUTILS_TARBALL="${XC_TARBALL_DIR}/${BINUTILS_FILENAME}"

export BINUTILS_FILENAME_SIG="${BINUTILS_FILENAME}.sig"
export BINUTILS_URL_SIG="${BINUTILS_URL}.sig"
export BINUTILS_TARBALL_SIG="${BINUTILS_TARBALL}.sig"

export BINUTILS_SRC_DIR="${XC_TMP_DIR}/binutils-${BINUTILS_VERSION}"
export BINUTILS_BUILD_DIR="${XC_TMP_DIR}/build-binutils"
export BINUTILS_CONFIGURE_OPTIONS=(
  "--prefix=${XC_PREFIX}"
)

BINUTILS_CONFIGURE_OPTIONS+=(${GLOBAL_CONFIGURE_OPTIONS[*]})

export KERNEL_FILENAME="linux-${KERNEL_VERSION}.tar.xz"
export KERNEL_URL="${KERNEL_BASE_URL}/v${KERNEL_VERSION_MAJOR}.x/${KERNEL_FILENAME}"
export KERNEL_TARBALL="${XC_TARBALL_DIR}/${KERNEL_FILENAME}"
export KERNEL_SRC_DIR="${XC_TMP_DIR}/linux-${KERNEL_VERSION}"
export KERNEL_MAKE_OPTIONS=(
  "ARCH=${XC_KERNEL_TARGET}"
  "INSTALL_HDR_PATH=${XC_HEADER_DIR}"
  "headers_install"
)

export GLIBC_FILENAME="glibc-${GLIBC_VERSION}.tar.xz"
export GLIBC_URL="${GNU_BASE_URL}/glibc/${GLIBC_FILENAME}"
export GLIBC_TARBALL="${XC_TARBALL_DIR}/${GLIBC_FILENAME}"

export GLIBC_FILENAME_SIG="${GLIBC_FILENAME}.sig"
export GLIBC_URL_SIG="${GLIBC_URL}.sig"
export GLIBC_TARBALL_SIG="${GLIBC_TARBALL}.sig"

export GLIBC_SRC_DIR="${XC_TMP_DIR}/glibc-${GLIBC_VERSION}"
export GLIBC_BUILD_DIR="${XC_TMP_DIR}/build-glibc"
export GLIBC_CONFIGURE_OPTIONS=(
  "--prefix=${XC_HEADER_DIR}"
  "--build=${MACHTYPE}"
  "--host=${XC_TARGET}"
  "--with-headers=${XC_HEADER_DIR}/include"
  "libc_cv_forced_unwind=yes"
)

GLIBC_CONFIGURE_OPTIONS+=(${GLOBAL_CONFIGURE_OPTIONS[*]})

export GCC_FILENAME="gcc-${GCC_VERSION}.tar.gz"
export GCC_URL="${GCC_BASE_URL}/releases/gcc-${GCC_VERSION}/${GCC_FILENAME}"
export GCC_TARBALL="${XC_TARBALL_DIR}/${GCC_FILENAME}"
export GCC_SRC_DIR="${XC_TMP_DIR}/gcc-${GCC_VERSION}"
export GCC_BUILD_DIR="${XC_TMP_DIR}/build-gcc"

export GCC_CONFIGURE_OPTIONS=(
  "--prefix=${XC_PREFIX}"
  "--enable-languages=${GCC_LANGS}"
)

GCC_CONFIGURE_OPTIONS+=(${GLOBAL_CONFIGURE_OPTIONS[*]})

export MPFR_FILENAME="mpfr-${MPFR_VERSION}.tar.xz"
export MPFR_URL="${GNU_BASE_URL}/mpfr/${MPFR_FILENAME}"
export MPFR_TARBALL="${XC_TARBALL_DIR}/${MPFR_FILENAME}"
export MPFR_SRC_DIR="${XC_TMP_DIR}/mpfr-${MPFR_VERSION}"

export MPC_FILENAME="mpc-${MPC_VERSION}.tar.gz"
export MPC_URL="${GNU_BASE_URL}/mpc/${MPC_FILENAME}"
export MPC_TARBALL="${XC_TARBALL_DIR}/${MPC_FILENAME}"
export MPC_SRC_DIR="${XC_TMP_DIR}/mpc-${MPC_VERSION}"

export GMP_FILENAME="gmp-${GMP_VERSION}${GMP_VERSION_MINOR}.tar.xz"
export GMP_URL="${GNU_BASE_URL}/gmp/${GMP_FILENAME}"
export GMP_TARBALL="${XC_TARBALL_DIR}/${GMP_FILENAME}"
export GMP_SRC_DIR="${XC_TMP_DIR}/gmp-${GMP_VERSION}"

export ISL_FILENAME="isl-${ISL_VERSION}.tar.bz2"
export ISL_URL="${GCC_BASE_URL}/infrastructure/${ISL_FILENAME}"
export ISL_TARBALL="${XC_TARBALL_DIR}/${ISL_FILENAME}"
export ISL_SRC_DIR="${XC_TMP_DIR}/isl-${ISL_VERSION}"

export CLOOG_FILENAME="cloog-${CLOOG_VERSION}.tar.gz"
export CLOOG_URL="${GCC_BASE_URL}/infrastructure/${CLOOG_FILENAME}"
export CLOOG_TARBALL="${XC_TARBALL_DIR}/${CLOOG_FILENAME}"
export CLOOG_SRC_DIR="${XC_TMP_DIR}/cloog-${CLOOG_VERSION}"