build

#!/usr/bin/env bash
# shellcheck disable=SC1117
#
# SPDX-License-Identifier: GPL-3.0-or-later
#
# Copyright (C) 2016-2018 USBhost
# Copyright (C) 2016-2017 Joe Maples
# Copyright (C) 2017-2018 Nathan Chancellor
#
# GCC cross compiler  compilation script


###########
# SOURCES #
###########

# http:https://preshing.com/20141119/how-to-build-a-gcc-cross-compiler/ # credits for almost everything
# http:https://www.mpfr.org/
# https://gmplib.org/
# http:https://www.multiprecision.org/
# http:https://isl.gforge.inria.fr/
# https://www.gnu.org/software/binutils/
# https://www.gnu.org/software/libc/
# https://www.kernel.org/
# https://git.linaro.org/toolchain/gcc.git # linaro and gnu


#############
# FUNCTIONS #
#############

# Easy alias for escape codes
function echo() {
    command echo -e "${@}"
}


# Help menu function
function help_menu() {
    echo
    echo "${BOLD}OVERVIEW:${RST} Build a gcc toolchain"
    echo
    echo "${BOLD}USAGE:${RST} ${0} <options>"
    echo
    echo "${BOLD}EXAMPLE:${RST} ${0} -a arm64 -s linaro -v 8"
    echo
    echo "${BOLD}EXAMPLE:${RST} ${0} -a x86_64 -s gnu -v 8"
    echo
    echo "${BOLD}REQUIRED PARAMETERS:${RST}"
    echo "  -a  | --arch:        Possible values: arm, arm64, i686, or x86_64. This is the toolchain's target architecture."
    echo "  -s  | --source:      Possible values: gnu or linaro. This is the GCC source (GNU official vs. Linaro fork)."
    echo "  -v  | --version:     Possible values: (4, 5, 6, 7, 8, 9*, and 10* [*GNU only]). This is the GCC version to build."
    echo
    echo "${BOLD}OPTIONAL PARAMETERS:${RST}"
    echo "  -f  | --full-src:    Download full git repos instead of shallow clones"
    echo "  -j  | --jobs:        Specify the amount of threads to use. This overrides the default detection"
    echo "  -nt | --no-tmpfs:    Do not use tmpfs for building (useful if you don't have much RAM)."
    echo "  -nu | --no-update:   Do not update the downloaded components before building (useful if you have slow internet)."
    echo "  -p  | --package:     Possible values: gz or xz. Compresses toolchain after build."
    echo "  -t  | --tarballs:    Use tarballs for binutils, ISL, and, GCC"
    echo "  -V  | --verbose:     Make script print all output, not just errors and the ending information"
    echo
}


# Prints a formatted header to let the user know what's being done
function header() {
    [[ "${*}" =~ "--no-first-echo" ]] || echo
    # shellcheck disable=SC2034
    echo "${RED}====$(for i in $(seq ${#1}); do echo "=\c"; done)===="
    echo "==  ${1}  =="
    # shellcheck disable=SC2034
    echo "====$(for i in $(seq ${#1}); do echo "=\c"; done)====${RST}"
    [[ "${*}" =~ "--no-second-echo" ]] || echo
}


# Prints an error in bold red
function die() {
    [[ -z ${VERBOSE} ]] && exec 1>&5 2>&6
    echo ""
    echo "${RED}${1}${RST}"
    [[ "${*}" =~ "-n" ]] && echo
    [[ "${*}" =~ "-h" ]] && help_menu
    exit
}


# Prints a warning in bold yellow
function warn() {
    echo ""
    echo "${YLW}${1}${RST}"
    [[ "${*}" =~ "-n" ]] && echo
}


# Formats the time for the end
function format_time() {
    MINS=$(((${2} - ${1}) / 60))
    SECS=$(((${2} - ${1}) % 60))
    if [[ ${MINS} -ge 60 ]]; then
        HOURS=$((MINS / 60))
        MINS=$((MINS % 60))
    fi

    if [[ ${HOURS} -eq 1 ]]; then
        TIME_STRING+="1 HOUR, "
    elif [[ ${HOURS} -ge 2 ]]; then
        TIME_STRING+="${HOURS} HOURS, "
    fi

    if [[ ${MINS} -eq 1 ]]; then
        TIME_STRING+="1 MINUTE"
    else
        TIME_STRING+="${MINS} MINUTES"
    fi

    if [[ ${SECS} -eq 1 && -n ${HOURS} ]]; then
        TIME_STRING+=", AND 1 SECOND"
    elif [[ ${SECS} -eq 1 && -z ${HOURS} ]]; then
        TIME_STRING+=" AND 1 SECOND"
    elif [[ ${SECS} -ne 1 && -n ${HOURS} ]]; then
        TIME_STRING+=", AND ${SECS} SECONDS"
    elif [[ ${SECS} -ne 1 && -z ${HOURS} ]]; then
        TIME_STRING+=" AND ${SECS} SECONDS"
    fi

    echo "${TIME_STRING}"
}


# Check if user needs to enter sudo password or not
function check_sudo() {
    echo
    echo "Checking if sudo is available, please enter your password if a prompt appears!"
    if ! sudo -v 2>/dev/null; then
        warn "Sudo is not available! Disabling the option for tmpfs..." -n
        NO_TMPFS=true
    fi
}


# Unmount tmpfs
function unmount_tmpfs() {
    if [[ -z ${NO_TMPFS} ]]; then
        sudo umount -f build-glibc 2>/dev/null
        sudo umount -f build-gcc 2>/dev/null
        sudo umount -f build-binutils 2>/dev/null
    fi
}


# git clone wrapper
function git_clone() {
    git clone ${DEPTH_FLAG:+"--depth=1"} "${@}"
}


# git fetch wrapper
function git_fetch() {
    git fetch ${DEPTH_FLAG:+"--depth=1"} "${@}"
}


# Initial setup
function setup_variables() {
    # Colors
    BOLD="\033[1m"
    RED="\033[01;31m"
    RST="\033[0m"
    YLW="\033[01;33m"

    # Configuration variables
    CONFIGURATION=( "--disable-multilib" "--disable-werror" )
    JOBS="-j$(($(nproc --all) + 1))"
    DEPTH_FLAG=true

    # Binary versions
    BINUTILS_git="binutils-2_32-branch"
    BINUTILS_tar="2.32"
    GMP="gmp-6.1.2"
    MPFR="mpfr-4.0.2"
    MPC="mpc-1.1.0"
    ISL="isl-0.21"
    GLIBC="glibc-2.29"
    LINUX="5.1"

    # Start of script
    START=$(date +%s)
}


# Parse parameters
function parse_parameters() {
    while [[ ${#} -ge 1 ]]; do
        case "${1}" in
            # REQUIRED FLAGS
            "-a"|"--arch") shift && ARCH=${1} ;;
            "-s"|"--source") shift && SOURCE=${1} ;;
            "-v"|"--version") shift && VERSION=${1} ;;

            # OPTIONAL FLAGS
            "-f"|"--full-src") DEPTH_FLAG=false ;;
            "-j"|"--jobs") shift && JOBS=-j${1} ;;
            "-nt"|"--no-tmpfs") NO_TMPFS=true ;;
            "-nu"|"--no-update") NO_UPDATE=true ;;
            "-p"|"--package") shift && COMPRESSION=${1} ;;
            "-t"|"--tarballs") TARBALLS=true ;;
            "-V"|"--verbose") VERBOSE=true ;;

            # HELP!
            "-h"|"--help") help_menu; exit ;;
        esac

        shift
    done

    [[ -z ${NO_TMPFS} ]] && check_sudo
    [[ -z ${VERBOSE} ]] && exec 6>&2 5>&1 &>/dev/null

    # Default values
    case "${ARCH}" in
        "arm") TARGET="arm-linux-gnueabi" ;;
        "arm64") TARGET="aarch64-linux-gnu" ;;
        "i686") TARGET="i686-linux-gnu" ;;
        "x86_64") [[ ${VERSION} -le 5 ]] && die "Will not build, Use newer version instead" -n
                  TARGET="x86_64-linux-gnu" ;;
        *) die "Absent or invalid arch specified!" -h ;;
    esac

    # Kernel architecture; i686 and x86_64 targets use x86
    [[ ${ARCH} = "i686" || ${ARCH} = "x86_64" ]] && KERNEL_ARCH=x86 || KERNEL_ARCH=${ARCH}

    if [[ -z ${TARBALLS} ]]; then
        # Set GCC branch based on version and Linaro or not
        case "${SOURCE}:${VERSION}" in
            "gnu:4") GCC=gcc-4_9-branch
                     BINUTILS_git="binutils-2_29-branch"
                     GLIBC="glibc-2.26"
                     ISL="isl-0.17.1" ;;
            "gnu:5") GCC=gcc-5-branch
                     GLIBC="glibc-2.27"
                     ISL="isl-0.17.1" ;;
            "gnu:6") GCC=gcc-6-branch ;;
            "gnu:7") GCC=gcc-7-branch ;;
            "gnu:8") GCC=gcc-8-branch ;;
            "gnu:9") GCC=gcc-9-branch ;;
            "gnu:10") GCC=master ;;
            "linaro:4") GCC=linaro-local/releases/linaro-4.9-2017.01
                        GLIBC="glibc-2.27"
                        ISL="isl-0.17.1" ;;
            "linaro:5") GCC=linaro-local/gcc-5-integration-branch
                        GLIBC="glibc-2.27"
                        ISL="isl-0.17.1" ;;
            "linaro:6") GCC=linaro-local/gcc-6-integration-branch ;;
            "linaro:7") GCC=linaro-local/gcc-7-integration-branch ;;
            # ARM has taken the responsibility from Linaro since 8.x
            "linaro:8") GCC=linaro-local/ARM/arm-8-branch ;;
            "linaro:9") die "There's no such thing as Linaro 9.x Clannad..." -h ;;
            "linaro:10") die "There's no such thing as Linaro 10.x Clannad..." -h ;;
            *) die "Absent or invalid GCC version or source specified!" -h ;;
        esac
    else
        # Set GCC branch based on version and Linaro or not
        case "${SOURCE}:${VERSION}" in
            "gnu:4") GCC=gcc-4.9.4
                     BINUTILS_tar="2.29.1"
                     GLIBC="glibc-2.26"
                     ISL="isl-0.17.1"
                     EXT=gz ;;
            "gnu:5") GCC=gcc-5.5.0
                     GLIBC="glibc-2.27"
                     ISL="isl-0.17.1" ;;
            "gnu:6") GCC=gcc-6.5.0 ;;
            "gnu:7") GCC=gcc-7.4.0 ;;
            "gnu:8") GCC=gcc-8.3.0 ;;
            "gnu:9") GCC=gcc-9.1.0 ;;
            "gnu:10") die "GCC 10.0 is currently a WIP so there is no tarball to download! Either use the git repo or choose a new version..." ;;
            "linaro:4") GCC=linaro-4.9-2017.01
                        GLIBC="glibc-2.27"
                        ISL="isl-0.17.1" ;;
            "linaro:5") GCC=linaro-5.5-2017.10
                        GLIBC="glibc-2.27"
                        ISL="isl-0.17.1" ;;
            "linaro:6") GCC=linaro-snapshot-6.5-2018.11 ;;
            "linaro:7") GCC=linaro-snapshot-7.4-2019.01 ;;
            # ARM has taken the responsibility from Linaro since 8.x
            # See later in this script why it's defined like this
            "linaro:8") GCC=8.3-2019.03 ;;
            "linaro:9") die "There's no such thing as Linaro 9.x Clannad..." -h ;;
            "linaro:10") die "There's no such thing as Linaro 10.x Clannad..." -h ;;
            *) die "Absent or invalid GCC version or source specified!" -h ;;
        esac
    fi
}


# Clean up from a previous compilation
function clean_up() { #FIXME: we dont need to remove everything everytime.
    header "CLEANING UP"

    unmount_tmpfs
    git clean -fxdq -e sources -e prebuilts -e patches
    find . -maxdepth 1 -type l -exec rm -rf {} \; #FIXME
    if [[ -d binutils ]] ||
       [[ -d build-binutils ]] ||
       [[ -d build-gcc ]] ||
       [[ -d build-glibc ]] ||
       [[ -d gcc ]] ||
       [[ -d linux ]] ||
       [[ -f ${TARGET} ]] ||
       [[ $(for FILE in *.tar.*; do if [[ -f "${FILE}" ]]; then echo "true"; break; else echo "false"; fi done) = "true" ]]; then

        die "Clean up failed! Aborting. Try checking that you have proper permissions to delete files."
    else
        echo "Clean up successful!"
    fi
}


function build_binaries() {
    ROOT=${PWD}
    PREBUILTS_BIN=${ROOT}/prebuilts/bin
    mkdir -p sources

    if [[ ! -f ${PREBUILTS_BIN}/txt2man ]]; then
        TXT2MAN=${ROOT}/sources/txt2man
        [[ ! -d ${TXT2MAN} ]] && git -C "$(dirname "${TXT2MAN}")" clone --depth=1 https://github.com/mvertes/txt2man
        git -C "${TXT2MAN}" clean -fxdq
        git -C "${TXT2MAN}" pull
        (
            cd "${TXT2MAN}" || die "Issue with cloning txt2man source!"
            make prefix="$(dirname "${PREBUILTS_BIN}")" install || die "Error installing txt2man!"
        )
    fi

    export PATH=${PREBUILTS_BIN}:${PATH}

    if [[ ! -f ${PREBUILTS_BIN}/axel ]]; then
        AXEL=${ROOT}/sources/axel
        [[ ! -d ${AXEL} ]] && git -C "$(dirname "${AXEL}")" clone --depth=1 https://github.com/axel-download-accelerator/axel
        git -C "${AXEL}" clean -fxdq
        git -C "${AXEL}" pull
        (
            cd "${AXEL}" || die "Issue with cloning axel source!"
            ./autogen.sh
            ./configure --prefix="$(dirname "${PREBUILTS_BIN}")"
            make "${JOBS}" || die "Error building axel!"
            make "${JOBS}" install || die "Error installing axel!"
        )
    fi

    if [[ ! -f ${PREBUILTS_BIN}/pigz ]]; then
        PIGZ=${ROOT}/sources/pigz
        [[ ! -d ${PIGZ} ]] && git -C "$(dirname "${PIGZ}")" clone --depth=1 https://github.com/madler/pigz
        git -C "${PIGZ}" clean -fxdq
        git -C "${PIGZ}" pull
        make -C "${PIGZ}" "${JOBS}" pigz || die "Error building pigz!"
        mv "${PIGZ}"/pigz "${PREBUILTS_BIN}"
    fi

    if [[ ! -f ${PREBUILTS_BIN}/pxz ]]; then
        PXZ=${ROOT}/sources/pxz
        [[ ! -d ${PXZ} ]] && git -C "$(dirname "${PXZ}")" clone --depth=1 https://github.com/krasCGQ/pxz
        git -C "${PXZ}" clean -fxdq
        git -C "${PXZ}" pull
        make -C "${PXZ}" "${JOBS}" pxz || die "Error building pxz!"
        mv "${PXZ}"/pxz "${PREBUILTS_BIN}"
    fi
}


function download_sources() {
    cd sources || die "Failed to create sources directory!"

    if [[ ! -f ${MPFR}.tar.xz ]]; then
        header "DOWNLOADING MPFR"
        axel https://www.mpfr.org/mpfr-current/${MPFR}.tar.xz
    fi

    if [[ ! -f ${GMP}.tar.xz ]]; then
        header "DOWNLOADING GMP"
        axel https://ftp.gnu.org/gnu/gmp/${GMP}.tar.xz
    fi

    if [[ ! -f ${MPC}.tar.gz ]]; then
        header "DOWNLOADING MPC"
        axel https://ftp.gnu.org/gnu/mpc/${MPC}.tar.gz
    fi

    if [[ ! -f ${GLIBC}.tar.xz ]]; then
        header "DOWNLOADING GLIBC ${GLIBC} FOR GCC ${VERSION}"
        axel https://ftp.gnu.org/gnu/glibc/${GLIBC}.tar.xz
    fi

    if [[ ! -f linux-${LINUX}.tar.xz ]]; then
        header "DOWNLOADING LINUX KERNEL"
        axel https://cdn.kernel.org/pub/linux/kernel/v${LINUX/.*}.x/linux-${LINUX}.tar.xz
    fi

    if [[ -z ${TARBALLS} ]]; then
        if [[ ! -d binutils ]]; then
            header "DOWNLOADING BINUTILS"
            git_clone https://git.linaro.org/toolchain/binutils-gdb.git binutils -b ${BINUTILS_git}
        fi

        if [[ ! -d isl ]]; then
            header "DOWNLOADING ISL"
            # don't use git_clone
            git clone git:https://repo.or.cz/isl.git
        fi

        if [[ ! -d gcc ]]; then
            header "DOWNLOADING GCC"
            git_clone https://git.linaro.org/toolchain/gcc.git -b ${GCC}
        fi
    else
        if [[ ! -f binutils-${BINUTILS_tar}.tar.xz ]]; then
            header "DOWNLOADING BINUTILS ${BINUTILS_tar} FOR GCC ${VERSION}"
            axel https://ftp.gnu.org/gnu/binutils/binutils-${BINUTILS_tar}.tar.xz
        fi

        if [[ ! -f ${ISL}.tar.xz ]]; then
            header "DOWNLOADING ISL ${ISL} FOR GCC ${VERSION}"
            axel http:https://isl.gforge.inria.fr/${ISL}.tar.xz
        fi

        # GNU, any version
        if [[ ${SOURCE} = "gnu" ]]; then
            if [[ ! -f ${GCC}.tar.${EXT:-xz} ]]; then
                header "DOWNLOADING GCC"
                axel https://mirrors.kernel.org/gnu/gcc/${GCC}/${GCC}.tar.${EXT:-xz}
            fi
            GCC_TAR=${GCC}.tar.${EXT:-xz}
        # Linaro, 8.x and newer
        elif [[ ${VERSION} -ge 8 ]]; then
            if [[ ! -f gcc-arm-src-snapshot-${GCC}.tar.xz ]]; then
                header "DOWNLOADING GCC"
                axel https://developer.arm.com/-/media/Files/downloads/gnu-a/${GCC}/srcrel/gcc-arm-src-snapshot-${GCC}.tar.xz
            fi
            GCC_TAR=gcc-arm-src-snapshot-${GCC}.tar.xz
        # Linaro, 7.x and older
        else
            if [[ ! -f gcc-${GCC}.tar.gz ]]; then
                header "DOWNLOADING GCC"
                axel https://git.linaro.org/toolchain/gcc.git/snapshot/gcc-${GCC}.tar.gz
            fi
            GCC_TAR=gcc-${GCC}.tar.gz
        fi
    fi

}


function extract() {
    case "${1}" in
        *.gz) UNPACK=pigz ;;
        *.xz) UNPACK=pxz ;;
    esac
    mkdir -p "${2}"
    ${UNPACK} -d < "${1}" | tar -xC "${2}" --strip-components=1
}


# Extract tarballs to their proper locations
function extract_sources() {
    header "EXTRACTING DOWNLOADED TARBALLS"
    extract ${MPFR}.tar.xz ../${MPFR}
    extract ${GMP}.tar.xz ../${GMP}
    extract ${MPC}.tar.gz ../${MPC}
    extract ${GLIBC}.tar.xz ../${GLIBC}
    extract linux-${LINUX}.tar.xz ../linux
    if [[ -n ${TARBALLS} ]]; then
        extract binutils-${BINUTILS_tar}.tar.xz ../binutils
        extract ${ISL}.tar.xz ../${ISL}
        if [[ ${SOURCE} = "linaro" && ${VERSION} -ge 8 ]]; then
            # We can't use extract function here as this ships other GNU tools
            # Only extract GCC source and later rename it to gcc
            pxz -d < ${GCC_TAR} | tar -xC .. gcc-arm-src-snapshot-${GCC}
            mv -f ../gcc-arm-src-snapshot-${GCC} ../gcc
        else
            extract ${GCC_TAR} ../gcc
        fi
    fi
}


# Update git repos
function update_repos() {
    if [[ -z ${NO_UPDATE} && -z ${TARBALLS} ]]; then
        header "UPDATING SOURCES"
        (
            cd isl || die "ISL did not get cloned properly!"
            git remote update
            git checkout -f ${ISL}
            ./autogen.sh
        )
        (
            cd binutils || die "binutils did not get cloned properly!"
            [[ -n ${FULL_SOURCE} ]] && BRANCH=origin/${BINUTILS_git} || BRANCH=FETCH_HEAD
            git_fetch origin ${BINUTILS_git}
            git checkout -f ${BINUTILS_git} || git checkout -f -b ${BINUTILS_git} ${BRANCH}
        )
        (
            cd gcc || die "GCC did not get cloned properly!"
            [[ -n ${FULL_SOURCE} ]] && BRANCH=origin/${GCC} || BRANCH=FETCH_HEAD
            git_fetch origin ${GCC}
            git checkout -f ${GCC} || git checkout -f -b ${GCC} ${BRANCH}
        )
    else
        if [[ -d isl ]]; then
            (
                cd isl || die "ISL did not get downloaded properly!"
                ./autogen.sh
            )
        fi
    fi

    cd ..

    [[ ! -d binutils ]] && ln -s sources/binutils binutils
    [[ ! -d gcc ]] && ln -s sources/gcc gcc
}


# Fetch required GCC patches
function fetch_patches() {
    mkdir -p patches
    cd patches || die "Failed to create patches directory!"

    if [[ ${VERSION} -eq 4 ]]; then
        # GCC 4.9 (ARM/i686): error: ‘SIGSEGV' was not declared in this scope
        GCC_PATCH="942-asan-fix-missing-include-signal-h"
        [[ ! -f ${GCC_PATCH}.patch ]] && curl -sLO https://raw.githubusercontent.com/buildroot/buildroot/master/package/gcc/4.9.4/${GCC_PATCH}.patch
    elif [[ ${VERSION} -ge 6 ]]; then
        if [[ ${VERSION} -le 8 ]]; then
            # GCC 6-8 (i686): error: ‘PATH_MAX' undeclared here (not in a function)
            GCC_PATCH="53faaf1da220f5e904a1e8c8b343e91121218f82"
        else
            # GNU GCC 9 (any): error: ‘PATH_MAX' was not declared on this scope
            GCC_PATCH="55a6998c4d5ce0ccd20bb0572915c2c94c0dc138"
        fi
        [[ ! -f ${GCC_PATCH}.patch ]] && curl -sLO https://gist.githubusercontent.com/krasCGQ/9e859c91e2e7c1fe0ffe009f4edd1d22/raw/114f29c50c15db2bc4ca9c2de348ad0fb3055ad1/${GCC_PATCH}.patch
    fi

    cd ..
}


# Setup source folders and build folders
function setup_env() {
    INSTALL=${ROOT}/${TARGET}
    export PATH=${INSTALL}/bin:${PATH}

    [[ ! -d gcc ]] && die "GCC source is missing! Please check your connection and rerun the script!" -h

    mkdir build-glibc
    mkdir build-gcc
    mkdir build-binutils

    if [[ -z ${NO_TMPFS} ]]; then
        sudo mount -t tmpfs -o rw none build-glibc
        sudo mount -t tmpfs -o rw none build-gcc
        sudo mount -t tmpfs -o rw none build-binutils
    fi

    cd gcc || die "GCC folder does not exit!"
    ln -s -f "${ROOT}/${MPFR}" mpfr
    ln -s -f "${ROOT}/${GMP}" gmp
    ln -s -f "${ROOT}/${MPC}" mpc
    if [[ -n ${TARBALLS} ]]; then
        ln -s -f "${ROOT}/${ISL}" isl
    else
        ln -s -f "${ROOT}/isl" isl
    fi

    if [[ -n ${GCC_PATCH} ]]; then
        patch -Np1 < "${ROOT}"/patches/${GCC_PATCH}.patch || die "Failed to patch GCC source!"
    fi
    cd ..

    if [[ -z ${VERBOSE} ]]; then
        exec 1>&5 2>&6
        header "BUILDING TOOLCHAIN"
        exec 6>&2 5>&1 &>/dev/null
    fi
}


# Build binutils
function build_binutils() {
    header "BUILDING BINUTILS"
    cd build-binutils || die "binutils build folder does not exist!"
    ../binutils/configure "${CONFIGURATION[@]}" \
                          --target=${TARGET} \
                          --prefix="${INSTALL}" \
                          --disable-gdb
    make "${JOBS}" || die "Error while building binutils!" -n
    make install "${JOBS}" || die "Error while installing binutils!" -n
}


# Make Linux kernel headers
function build_headers() {
    header "MAKING LINUX HEADERS"
    cd ../linux || die "Linux kernel folder does not exist!"
    make ARCH="${KERNEL_ARCH}" \
        INSTALL_HDR_PATH="${INSTALL}/${TARGET}" \
        headers_install "${JOBS}" || die "Error while building/installing Linux headers!" -n
}


# Build GCC
function build_gcc() {
    header "MAKING GCC"
    cd ../build-gcc || die "GCC build folder does not exist!"
    ../gcc/configure "${CONFIGURATION[@]}" \
                     --enable-languages=c,c++ \
                     --target=${TARGET} \
                     --prefix="${INSTALL}"
    make all-gcc "${JOBS}" || die "Error while building gcc!" -n
    make install-gcc "${JOBS}" || die "Error while installing gcc!" -n
    if [[ ${ARCH} = "x86_64" ]]; then
        make all-target-libgcc "${JOBS}" || die "Error while installing libgcc for host!" -n
        make install-target-libgcc "${JOBS}" || die "Error while installing libgcc for target!" -n
    fi
}


# Build glibc
function build_glibc() {
    header "MAKING GLIBC"
    cd ../build-glibc || die "glibc build folder does not exist!"
    ../${GLIBC}/configure --prefix="${INSTALL}/${TARGET}" \
                          --build="${MACHTYPE}" \
                          --host=${TARGET} \
                          --target=${TARGET} \
                          --with-headers="${INSTALL}/${TARGET}/include" \
                          "${CONFIGURATION[@]}" libc_cv_forced_unwind=yes
    make install-bootstrap-headers=yes install-headers "${JOBS}" || die "Error installing headers for glibc!" -n
    make csu/subdir_lib "${JOBS}" || die "Error while making subdir_lib for glibc!" -n
    install csu/crt1.o csu/crti.o csu/crtn.o "${INSTALL}/${TARGET}/lib"
    ${TARGET}-gcc -nostdlib -nostartfiles -shared -x c /dev/null -o "${INSTALL}/${TARGET}/lib/libc.so"
    touch "${INSTALL}/${TARGET}/include/gnu/stubs.h"
    if [[ ${ARCH} = "x86_64" ]]; then
        make "${JOBS}" || die "Error while building glibc for the host!" -n
        make install "${JOBS}" || die "Error while installing glibc for the host!" -n
    else
        cd ../build-gcc || die "GCC build folder does not exist!"
        make all-target-libgcc "${JOBS}" || die "Error while building libgcc for target!" -n
        make install-target-libgcc "${JOBS}" || die "Error while installing libgcc for target!" -n

        cd ../build-glibc || die "glibc build folder does not exist!"
        make "${JOBS}" || die "Error while building glibc for target" -n
        make install "${JOBS}" || die "Error while installing glibc for target" -n
    fi
}


# Install GCC
function install_gcc() {
    header "INSTALLING GCC"
    cd ../build-gcc || die "GCC build folder does not exist!"
    make all "${JOBS}" || die "Error while compiling final toolchain!" -n
    make install "${JOBS}" || die "Error while installing final toolchain!" -n
    cd ..
}


# Package toolchain
function package_tc() {
    if [[ -n ${COMPRESSION} ]]; then
        PACKAGE=${TARGET}-${VERSION}.x-${SOURCE}-$(TZ=UTC date +%Y%m%d).tar.${COMPRESSION}

        header "PACKAGING TOOLCHAIN"

        echo "Target file: ${PACKAGE}"

        case "${COMPRESSION}" in
            "gz")
                echo "Packaging with GZIP..."
                GZ_OPT=-9 tar -c --use-compress-program=pigz -f "${PACKAGE}" ${TARGET} ;;
            "xz")
                echo "Packaging with XZ..."
                XZ_OPT=-9 tar -c --use-compress-program=pxz -f "${PACKAGE}" ${TARGET} ;;
            *)
                die "Invalid compression specified... skipping" ;;
        esac
    fi
}


# Ending information
function ending_info() {
    END=$(date +%s)

    [[ -z ${VERBOSE} ]] && exec 1>&5 2>&6
    if [[ -e ${TARGET}/bin/${TARGET}-gcc ]]; then
        header "BUILD SUCCESSFUL" ${VERBOSE:-"--no-first-echo"}
        echo "${BOLD}Script duration:${RST} $(format_time "${START}" "${END}")"
        echo "${BOLD}GCC version:${RST} $(${TARGET}/bin/${TARGET}-gcc --version | head -n 1)"
        if [[ -n ${COMPRESSION} ]] && [[ -e ${PACKAGE} ]]; then
            echo "${BOLD}File location:${RST} $(pwd)/${PACKAGE}"
            echo "${BOLD}File size:${RST} $(du -h "${PACKAGE}" | awk '{print $1}')"
        else
            echo "${BOLD}Toolchain location:${RST} $(pwd)/${TARGET}"
        fi
    else
        header "BUILD FAILED"
    fi

    # Alert to script end
    echo "\a"
}


setup_variables
parse_parameters "${@}"
trap 'unmount_tmpfs; die "Manually aborted!" -n' SIGINT SIGTERM
trap 'unmount_tmpfs' EXIT
clean_up
build_binaries
download_sources
extract_sources
update_repos
fetch_patches
setup_env
build_binutils
build_headers
build_gcc
build_glibc
install_gcc
package_tc
ending_info