#!/bin/sh
#------------------------------------------------------------------------------
# =========                 |
# \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
#  \\    /   O peration     |
#   \\  /    A nd           | Copyright (C) 2017-2018 OpenCFD Ltd.
#    \\/     M anipulation  |
#------------------------------------------------------------------------------
# License
#     This file is part of OpenFOAM, licensed under GNU General Public License
#     <http://www.gnu.org/licenses/>.
#
# Script
#     makeMPICH
#
# Description
#     Build script for mpich - legacy (unmaintained) build code!
#
# ----------------------------------------------
# NO USER-CONFIGURABLE SETTINGS WITHIN THIS FILE
#------------------------------------------------------------------------------
# Dynamic library endings (default is .so)
[ "$(uname -s)" = Darwin ] && SO=dylib || SO=so

# Short-circuit test for an installation
if [ "$1" = "-test" ]
then
    [ "$#" -eq 2 ] || { echo "${0##*/} -test : needs 1 argument"; exit 1; }
    dir="$2" # <- MPI_ARCH_PATH
    if [ -r "$dir/lib$WM_COMPILER_LIB_ARCH/libmpich.$SO" ]
    then
        echo "Have mpich shared library (${dir##*/})"
        exit 0
    elif [ -r "$dir/lib$WM_COMPILER_LIB_ARCH/libmpich.a" ]
    then
        echo "Have mpich static library (${dir##*/})"
        exit 0
    else
        echo "No mpich libraries found: ${dir:-not-specified}"
        exit 2
    fi
fi
#------------------------------------------------------------------------------
# Run from third-party directory only
cd ${0%/*} && wmakeCheckPwd "$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
}
. etc/tools/ThirdPartyFunctions
# Transition
# ~~~~~~~~~~
_foamAddLib()  { true; }
_foamAddMan()  { true; }
_foamAddPath() { true; }
#------------------------------------------------------------------------------

WM_MPLIB=MPICH                                  # Ensure we get the correct MPI

# mpich version from OpenFOAM etc/config.sh file:
_foamConfig mpi

mpiPACKAGE=${FOAM_MPI:-mpich-system}

#------------------------------------------------------------------------------
usage() {
    exec 1>&2
    while [ "$#" -ge 1 ]; do echo "$1"; shift; done
    cat<<USAGE

usage: ${0##*/} [OPTION] [mpich-VERSION] [-- configure-options]
options:
  -gcc              force gcc/g++ instead of the values from \$WM_CC, \$WM_CXX
  -help

* build mpich with
      ${mpiPACKAGE:-'unspecified mpich version'}

USAGE
    exit 1
}
#------------------------------------------------------------------------------
exportCompiler          # Compiler info for CMake/configure

# Parse options
while [ "$#" -gt 0 ]
do
    case "$1" in
    '') ;;      # Ignore empty
    --) break;; # Extra configure options (leave on $@ for later detection)
    -h | -help) usage   ;;
    -gcc)       useGcc  ;;

    mpich*)
        mpiPACKAGE="${1%%/}"
        ;;

    *)
        die "unknown option/argument: '$1'"
        ;;
    esac
    shift
done

[ -n "$mpiPACKAGE" ] || die "The mpich-VERSION was not specified"

# Nothing to build
if _foamIsNone "$mpiPACKAGE"
then
    echo "Using mpich-none (skip ThirdParty build of mpich)"
    exit 0
elif _foamIsSystem "$mpiPACKAGE"
then
    echo "Using mpich-system (skip ThirdParty build of mpich)"
    exit 0
fi

#------------------------------------------------------------------------------
#
# Build mpich
#
#   MPI_SOURCE_DIR : location of the original sources
#   MPI_ARCH_PATH  : installation directory

MPI_SOURCE_DIR=$sourceBASE/$mpiPACKAGE
MPI_ARCH_PATH=$installBASE/$mpiPACKAGE

if [ -r "$MPI_ARCH_PATH/lib_ARCH/libmpi.$SO" ]
then
    echo "Already has shared library"
elif [ -r "$MPI_ARCH_PATH/lib/libmpi.a" ]
then
    echo "Already has static library"
else
    echo "Starting build: $WM_MPLIB ($mpiPACKAGE)"
    echo

    (
        # Configuration options:
        unset configOpt

        # Additional configure options
        if [ "$1" = "--" ]
        then
            shift
            configOpt="$configOpt $@"
        fi

        # End of configuration options
        # ----------------------------

        cd $MPI_SOURCE_DIR || exit 1
        export GIT_DIR=$PWD/.git # Mask seeing our own git-repo
        [ -e Makefile ] && make distclean 2>/dev/null

        rm -rf $MPI_ARCH_PATH
        rm -rf $buildDIR
        mkdir -p $buildDIR
        cd $buildDIR

        set -x
        $MPI_SOURCE_DIR/configure \
            --prefix=$MPI_ARCH_PATH \
            --disable-fortran --disable-g \
            --libdir=$MPI_ARCH_PATH/lib$WM_COMPILER_LIB_ARCH \
            --enable-shared --disable-static \
            $configOpt \
        && set +x \
        && make -j $WM_NCOMPPROCS \
        && make install \
        && echo "Built: $mpiPACKAGE" \
        && pkgconfigAdjust $MPI_ARCH_PATH
    ) || {
        echo "Error building: $mpiPACKAGE"
        exit 1
    }
fi

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