#!/bin/sh
#------------------------------------------------------------------------------
# =========                 |
# \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
#  \\    /   O peration     |
#   \\  /    A nd           | www.openfoam.com
#    \\/     M anipulation  |
#------------------------------------------------------------------------------
#     Copyright (C) 2011-2016 OpenFOAM Foundation
#     Copyright (C) 2016-2021 OpenCFD Ltd.
#------------------------------------------------------------------------------
# License
#     This file is part of OpenFOAM, distributed under GPL-3.0-or-later.
#
# Script
#     makeGcc
#
# Description
#     Build script gcc and gmp, mpfr, mpc.
#
#     To force building against the system gmp/mpfr/mpc libraries,
#     use a corresponding '*-system' version. For example,
#
#         makeGcc gmp-system
#
#     or use the '-system' options to use system libraries everywhere.
#
#     The WM_COMPILER value can also be used specify a known gcc version.
#     For example (also compiling against system gmp/mpfr/mpc),
#
#         WM_COMPILER=Gcc51 ./makeGcc -system
#
# ----------------------------------------------
# NO USER-CONFIGURABLE SETTINGS WITHIN THIS FILE
#------------------------------------------------------------------------------
if :    # Run from third-party directory
then
    cd "${0%/*}" || exit
    wmakeCheckPwd "$WM_THIRD_PARTY_DIR" 2>/dev/null || {
        echo "Error (${0##*/}) : not located in \$WM_THIRD_PARTY_DIR"
        echo "    Check your OpenFOAM environment and installation"
        exit 1
    }
fi
. "${WM_THIRD_PARTY_DIR:?}"/etc/tools/ThirdPartyFunctions
#------------------------------------------------------------------------------
unset GMP_ARCH_PATH MPFR_ARCH_PATH                                  # Purge old

[ "${WM_COMPILER#Gcc}" = "$WM_COMPILER" ] && WM_COMPILER=Gcc        # Force gcc
WM_COMPILER_TYPE=ThirdParty                # Ensure we get the correct settings

# Default GCC, mpfr, gmp and mpc versions from OpenFOAM etc/config.sh file:
_foamConfig compiler

GMP_PACKAGE="${gmp_version:-gmp-system}"
MPFR_PACKAGE="${mpfr_version:-mpfr-system}"
MPC_PACKAGE="${mpc_version:-mpc-system}"
GCC_PACKAGE="$gcc_version"

#------------------------------------------------------------------------------
printVersions() { listPackageVersions gcc gmp mpfr mpc; exit 0; }
printHelp() {
    cat<<USAGE

Usage: ${0##*/} [OPTION] [gcc-VERSION] [gmp-VERSION] [mpfr-VERSION] [mpc-VERSION]
options:
  -clang            Force clang/clang++ for building
  -m32 | -m64       32-bit or 64-bit (default) ABI
  -multilib         for 64-bit systems with 32-bit support required
  -no-multilib      for 64-bit systems without 32-bit support (DEFAULT)
  -no-threadsafe    disable mpfr thread-safe (default is auto-detect)
  -system           use system versions for gmp/mpfr/mpc
  -list             List available unpacked source versions
  -help             Display usage help

* Build combinations of gmp, mpfr, mpc and gcc
      ${GMP_PACKAGE:-[gmp unspecified]}
      ${MPFR_PACKAGE:-[mpfr unspecified]}
      ${MPC_PACKAGE:-[mpc unspecified]}
      ${GCC_PACKAGE:-[gcc unspecified]}

USAGE
    showDownloadHint gcc
    showDownloadHint gmp
    showDownloadHint mpfr
    showDownloadHint mpc
    exit 0 # Clean exit
}
#------------------------------------------------------------------------------
optArch=64      # Use 64-bit ABI

# Build 32-bit libraries on 64-bit systems (normally not needed)
optMultilib=disable
unset optThreadSafe # unset=auto

# Parse options
while [ "$#" -gt 0 ]
do
    case "$1" in
    '') ;;      # Ignore empty
    -h | -help*) printHelp;;
    -list)      printVersions;;
    -clang)     # Force use of clang/clang++ for building
        export CC=clang
        export CXX=clang++
        ;;

    -m32 | -m64)
        optArch="${1#*m}"
        ;;
    -multi*)
        optMultilib=enable
        ;;
    -no-multi*)
        optMultilib=disable
        ;;
    -no-thread*)
        optThreadSafe=disable
        ;;
    -sys*)
        GMP_PACKAGE="gmp-system"
        MPFR_PACKAGE="mpfr-system"
        MPC_PACKAGE="mpc-system"
        unset GMP_ARCH_PATH MPFR_ARCH_PATH
        ;;

    gmp/* | sources/gmp* |\
    gmp-[0-9]* | gmp-system)
        GMP_PACKAGE="${1%%/}"
        unset GMP_ARCH_PATH
        ;;

    mpfr/* | sources/mpfr* |\
    mpfr-[0-9]* | mpfr-system)
        MPFR_PACKAGE="${1%%/}"
        unset MPFR_ARCH_PATH
        ;;

    mpc/* | sources/mpc* |\
    mpc-[0-9]* | mpc-system)
        MPC_PACKAGE="${1%%/}"
        ;;

    gcc/* | sources/gcc* |\
    gcc-[0-9]* | gcc-system)
        GCC_PACKAGE="${1%%/}"
        ;;
    [0-9]*)
        GCC_PACKAGE="gcc-${1%%/}"
        ;;
    *)
        die "unknown option/argument: '$1'"
        ;;
    esac
    shift
done

[ -n "$GCC_PACKAGE" ] || die "The gcc-VERSION was not specified"

cat<<SUMMARY
GCC configuration
------------------
    ABI     = $optArch
    GCC     = $GCC_PACKAGE
    GMP     = $GMP_PACKAGE
    MPFR    = $MPFR_PACKAGE
    MPC     = $MPC_PACKAGE
------------------
Using CC    = $CC $CFLAGS
Using CXX   = $CXX $CXXFLAGS
SUMMARY

#------------------------------------------------------------------------------
# !Build/install locations with arch name only (NO compiler name)!
buildBASE="$(dirname "$buildBASE")/$WM_ARCH$WM_COMPILER_ARCH"
installBASE="$(dirname "$installBASE")/$WM_ARCH$WM_COMPILER_ARCH"

# gcc
GCC_SOURCE="$(findSourceDir "$GCC_PACKAGE")"
GCC_PACKAGE="$(basename "$GCC_PACKAGE")"
GCC_PREFIX="$installBASE/$GCC_PACKAGE"

# gmp
GMP_SOURCE="$(findSourceDir "$GMP_PACKAGE")"
GMP_PACKAGE="$(basename "$GMP_PACKAGE")"
GMP_PREFIX="$installBASE/$GMP_PACKAGE"

# mpc
MPC_SOURCE="$(findSourceDir "$MPC_PACKAGE")"
MPC_PACKAGE="$(basename "$MPC_PACKAGE")"
MPC_PREFIX="$installBASE/$MPC_PACKAGE"

# mpfr
MPFR_SOURCE="$(findSourceDir "$MPFR_PACKAGE")"
MPFR_PACKAGE="$(basename "$MPFR_PACKAGE")"
MPFR_PREFIX="$installBASE/$MPFR_PACKAGE"


# Override as per config file (if any)
[ -n "$GMP_ARCH_PATH" ]  && GMP_PREFIX="$GMP_ARCH_PATH"
[ -n "$MPFR_ARCH_PATH" ] && MPFR_PREFIX="$MPFR_ARCH_PATH"


# Prefix <dir> to LD_LIBRARY_PATH, if it exists. 0 on success, 1 on failure
addLib()
{
    if [ -d "$1" ]
    then
        export LD_LIBRARY_PATH="$1:$LD_LIBRARY_PATH"
        return 0
    else
        return 1
    fi
}


# ================
# Build GMP
# ================
echo "---------------"
if [ -d "$GMP_PREFIX" ]
then
    echo "Already built: $GMP_PREFIX"
elif _foamIsSystem "$GMP_PREFIX"
then
    echo "Using system gmp"
else
    echo "Starting build: $GMP_PACKAGE"
    echo
(
    PKG_SOURCE="$GMP_SOURCE"
    PKG_PREFIX="$GMP_PREFIX"
    PKG_BUILD="$buildBASE/$GMP_PACKAGE"
    export GIT_DIR="$PKG_SOURCE/.git"

    cd "$PKG_SOURCE" || exit
    make distclean 2>/dev/null || true

    rm -rf "$PKG_BUILD"
    mkdir -p "$PKG_BUILD"

    cd "$PKG_BUILD" && set -x && \
    "$PKG_SOURCE"/configure ABI="$optArch" \
        --prefix="$PKG_PREFIX" \
        --libdir="$PKG_PREFIX/lib$WM_COMPILER_LIB_ARCH" \
        --enable-cxx \
    && set +x \
    && make -j $WM_NCOMPPROCS \
    && make install \
    && echo "Built: $GMP_PACKAGE"
) || {
    echo "Error building: $GMP_PACKAGE"
    exit 1
}
fi

if addLib "$GMP_PREFIX/lib$WM_COMPILER_LIB_ARCH"
then
    configGMP=$(cat <<CONFIG_OPTIONS
    --with-gmp-include=$GMP_PREFIX/include
    --with-gmp-lib=$GMP_PREFIX/lib$WM_COMPILER_LIB_ARCH
CONFIG_OPTIONS
)
else
    unset configGMP
fi


# ================
# Build MPFR
# ================
echo "---------------"
if [ -d "$MPFR_PREFIX" ]
then
    echo "Already built: $MPFR_PACKAGE"
elif _foamIsSystem "$MPFR_PREFIX"
then
    echo "Using system mpfr"
else
    echo "Starting build: $MPFR_PACKAGE"
    echo
(
    PKG_SOURCE="$MPFR_SOURCE"
    PKG_PREFIX="$MPFR_PREFIX"
    PKG_BUILD="$buildBASE/$MPFR_PACKAGE"
    export GIT_DIR="$PKG_SOURCE/.git"

    cd "$PKG_SOURCE" || exit
    make distclean 2>/dev/null || true

    rm -rf "$PKG_BUILD"
    mkdir -p "$PKG_BUILD"

    unset configOpt
    # explicitly enable/disable thread-safe
    [ -n "$optThreadSafe" ] && configOpt="--${optThreadSafe}-thread-safe"

    cd "$PKG_BUILD" && set -x && \
    "$PKG_SOURCE"/configure ABI="$optArch" \
        --prefix="$PKG_PREFIX" \
        --libdir="$PKG_PREFIX/lib$WM_COMPILER_LIB_ARCH" \
        $configGMP $configOpt \
    && set +x \
    && make -j $WM_NCOMPPROCS \
    && make install \
    && echo "Built: $MPFR_PACKAGE"
) || {
    echo "Error building: $MPFR_PACKAGE"
    exit 1
}
fi

if addLib "$MPFR_PREFIX/lib$WM_COMPILER_LIB_ARCH"
then
    configMPFR=$(cat <<CONFIG_OPTIONS
    --with-mpfr-include=$MPFR_PREFIX/include \
    --with-mpfr-lib=$MPFR_PREFIX/lib$WM_COMPILER_LIB_ARCH
CONFIG_OPTIONS
)
else
    unset configMPFR
fi


# ================
# Build MPC
# ================
echo "---------------"
if [ -d "$MPC_PREFIX" ]
then
    echo "Already built: $MPC_PACKAGE"
elif _foamIsSystem "$MPC_PREFIX"
then
    echo "Using system mpc"
else
    echo "Starting build: $MPC_PACKAGE"
    echo
(
    PKG_SOURCE="$MPC_SOURCE"
    PKG_PREFIX="$MPC_PREFIX"
    PKG_BUILD="$buildBASE/$MPC_PACKAGE"
    export GIT_DIR="$PKG_SOURCE/.git"

    cd "$PKG_SOURCE" || exit
    make distclean 2>/dev/null || true

    rm -rf "$PKG_BUILD"
    mkdir -p "$PKG_BUILD"

    cd "$PKG_BUILD" && set -x && \
    "$PKG_SOURCE"/configure ABI="$optArch" \
        --prefix="$PKG_PREFIX" \
        --libdir="$PKG_PREFIX/lib$WM_COMPILER_LIB_ARCH" \
        $configGMP $configMPFR \
    && set +x \
    && make -j $WM_NCOMPPROCS \
    && make install \
    && echo "Built: $MPC_PACKAGE"
) || {
    echo "Error building: $MPC_PACKAGE"
    exit 1
}
fi

if addLib "$MPC_PREFIX/lib$WM_COMPILER_LIB_ARCH"
then
    configMPC=$(cat <<CONFIG_OPTIONS
    --with-mpc-include=$MPC_PREFIX/include \
    --with-mpc-lib=$MPC_PREFIX/lib$WM_COMPILER_LIB_ARCH
CONFIG_OPTIONS
)
else
    unset configMPC
fi


# ================
# Build GCC
# ================
# may need 32-bit glibc-devel headers to compile
# E.g. on ubuntu install g++-multilib
# or specify -no-multilib on the command-line
#
echo "---------------"
if [ -d "$GCC_PREFIX" ]
then
    echo "Already built: $GCC_PACKAGE"
elif _foamIsSystem "$GCC_PREFIX"
then
    echo "Using system gcc"
else
    echo "Starting build: $GCC_PACKAGE"
    echo
(
    PKG_SOURCE="$GCC_SOURCE"
    PKG_PREFIX="$GCC_PREFIX"
    PKG_BUILD="$buildBASE/$GCC_PACKAGE"
    export GIT_DIR="$PKG_SOURCE/.git"

    cd "$PKG_SOURCE" || exit
    make distclean 2>/dev/null || true

    rm -rf "$PKG_BUILD"
    mkdir -p "$PKG_BUILD"

    unset configOpt
    # with/without multi-lib (32-bit support on 64-bit systems)
    [ -n "$optMultilib" ] && configOpt="--${optMultilib}-multilib"

    cd "$PKG_BUILD" && set -x && \
    "$PKG_SOURCE"/configure \
        --prefix="$PKG_PREFIX" \
        --with-pkgversion=www.openfoam.com \
        --enable-languages=c,c++ \
        --enable-__cxa_atexit \
        --enable-libstdcxx-allocator=new \
        --with-system-zlib \
        $configGMP $configMPFR $configMPC $configOpt \
        MAKEINFO=missing \
    && set +x \
    && make -j $WM_NCOMPPROCS \
    && make install \
    && echo "Built: $GCC_PACKAGE"
) || {
    echo "Error building: $GCC_PACKAGE"
    exit 1
}
fi


#------------------------------------------------------------------------------