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#! /bin/bash

################################################################################
# Prepare
################################################################################

# Set up shell
if [ "$(echo ${VERBOSE} | tr '[:upper:]' '[:lower:]')" = 'yes' ]; then
    set -x                      # Output commands
fi
set -e                          # Abort on errors



################################################################################
# Search
################################################################################

if [ -z "${LORENE_DIR}" ]; then
    echo "BEGIN MESSAGE"
    echo "LORENE selected, but LORENE_DIR not set."
    echo "END MESSAGE"
else
    echo "BEGIN MESSAGE"
    echo "Using LORENE in ${LORENE_DIR}"
    echo "END MESSAGE"
fi



################################################################################
# Build
################################################################################

if [ -z "${LORENE_DIR}"                                                 \
     -o "$(echo "${LORENE_DIR}" | tr '[a-z]' '[A-Z]')" = 'BUILD' ]
then
    echo "BEGIN MESSAGE"
    echo "Using bundled LORENE..."
    echo "END MESSAGE"
    
    # Set locations
    THORN=LORENE
    NAME=Lorene
    SRCDIR=$(dirname $0)
    BUILD_DIR=${SCRATCH_BUILD}/build/${THORN}
    if [ -z "${LORENE_INSTALL_DIR}" ]; then
        INSTALL_DIR=${SCRATCH_BUILD}/external/${THORN}
    else
        echo "BEGIN MESSAGE"
        echo "Installing LORENE into ${LORENE_INSTALL_DIR}"
        echo "END MESSAGE"
        INSTALL_DIR=${LORENE_INSTALL_DIR}
    fi
    DONE_FILE=${SCRATCH_BUILD}/done/${THORN}
    LORENE_DIR=${INSTALL_DIR}
    
    if [ -e ${DONE_FILE} -a ${DONE_FILE} -nt ${SRCDIR}/dist/${NAME}.tar.gz \
                         -a ${DONE_FILE} -nt ${SRCDIR}/configure.sh ]
    then
        echo "BEGIN MESSAGE"
        echo "LORENE has already been built; doing nothing"
        echo "END MESSAGE"
    else
        echo "BEGIN MESSAGE"
        echo "Building LORENE"
        echo "END MESSAGE"
        
        # Build in a subshell
        (
        exec >&2                # Redirect stdout to stderr
        if [ "$(echo ${VERBOSE} | tr '[:upper:]' '[:lower:]')" = 'yes' ]; then
            set -x              # Output commands
        fi
        set -e                  # Abort on errors
        cd ${SCRATCH_BUILD}
        
        # Set up environment
        unset LIBS
        if echo '' ${ARFLAGS} | grep 64 > /dev/null 2>&1; then
            export OBJECT_MODE=64
        fi

        #######################################################################
        # determine OPENMP_MODE from the OPENMP option
        # if this option isn't set, then OPENMP_MODE will default to 'no'
        OPENMP_MODE='no'
        if test -n "${OPENMP}"; then
            
            OPENMP=`echo ${OPENMP} | tr '[:upper:]' '[:lower:]'`
            
            if test "${OPENMP}" != 'yes' -a "${OPENMP}" != 'no'; then
                echo 'BEGIN ERROR'
                echo "configure: error: Didn't recognize setting of OPENMP=\"$OPENMP\" (should be either \"yes\" or \"no\")"
                echo 'END ERROR'
                exit 1
            fi
            OPENMP_MODE="${OPENMP}"
        fi
        
        echo "LORENE: Preparing directory structure..."
        mkdir build external done 2> /dev/null || true
        rm -rf ${BUILD_DIR} ${INSTALL_DIR}
        mkdir ${BUILD_DIR} ${INSTALL_DIR}
        
        echo "LORENE: Unpacking archive..."
        pushd ${BUILD_DIR}
        ${TAR?} xzf ${SRCDIR}/dist/${NAME}.tar.gz
        ${PATCH?} -p0 < ${SRCDIR}/dist/des.patch
        ${PATCH?} -p0 < ${SRCDIR}/dist/makesystem.patch
        ${PATCH?} -p0 < ${SRCDIR}/dist/pgplot.patch
        ${PATCH?} -p0 < ${SRCDIR}/dist/openmp.patch
        ${PATCH?} -p0 < ${SRCDIR}/dist/check_fopen_error.patch
        # Some (ancient but still used) versions of patch don't support the
        # patch format used here but also don't report an error using the
        # exit code. So we use this patch to test for this
        ${PATCH?} -p0 < ${SRCDIR}/dist/patchtest.patch
        if [ ! -e Lorene/.patch_tmp ]; then
            echo 'BEGIN ERROR'
            echo 'The version of patch is too old to understand this patch format.'
            echo 'Please set the PATCH environment variable to a more recent '
            echo 'version of the patch command.'
            echo 'END ERROR'
            exit 1
        fi
        rm -f Lorene/.patch_tmp
        # Prevent overly long lines
        for file in $(find ${NAME} -name '*.f'); do
            # Remove CVS Header comments
            perl -pi -e 's{\$Header.*\$}{\$Header\$}g' $file
            # Replace tabs with eight blanks
            perl -pi -e 's{\t}{        }' $file
            # Remove in-line comments (in lines without quotes)
            perl -pi -e 's{^([^'\''"]*?)!.*$}{$1}' $file
            # Break long lines
            perl -pi -e 's{^([ 0-9].{71})(.+)}{$1\n     \$$2}' $file
        done
        
        echo "LORENE: Configuring..."
        cd ${NAME}
        if echo ${F77} | grep -i xlf > /dev/null 2>&1; then
            FIXEDF77FLAGS=-qfixed
        fi
        export HOME_LORENE=${BUILD_DIR}/${NAME}
        cat > local_settings <<EOF
CXX = ${CXX}
CXXFLAGS = ${CXXFLAGS} ${CPPFLAGS} $(test x${OPENMP_MODE} = xyes && echo ${CXX_OPENMP_FLAGS} ${CPP_OPENMP_FLAGS})
CXXFLAGS_G = ${CXXFLAGS} ${CPPFLAGS} $(test x${OPENMP_MODE} = xyes && echo ${CXX_OPENMP_FLAGS} ${CPP_OPENMP_FLAGS})
F77 = ${F77}
F77FLAGS = ${F77FLAGS} ${FIXEDF77FLAGS} $(test x${OPENMP_MODE} = xyes && echo ${F77_OPENMP_FLAGS})
F77FLAGS_G = ${F77FLAGS} ${FIXEDF77FLAGS} $(test x${OPENMP_MODE} = xyes && echo ${F77_OPENMP_FLAGS})
INC = -I\$(HOME_LORENE)/C++/Include -I\$(HOME_LORENE)/C++/Include_extra \$(addprefix -I,${GSL_INC_DIRS})
RANLIB = ${RANLIB}
# We don't need dependencies since we always build from scratch
#MAKEDEPEND = ${CXX_DEPEND} \$(INC) \$< ${CXX_DEPEND_OUT} && mv \$@ \$(df).d
MAKEDEPEND = : > \$(df).d
DEPDIR = .deps
FFT_DIR = FFT991
LIB_CXX = ${LIBS}
LIB_LAPACK = ${LAPACK_LIBS} ${BLAS_LIBS}
LIB_PGPLOT =
LIB_GSL = ${GSL_LIBS}
DONTBUILDDEBUGLIB = yes
EOF
        if [ -n "$XARGS" ]; then echo "XARGS = $XARGS" >> local_settings; fi
        if [ -n "$FIND"  ]; then echo "FIND = $FIND"   >> local_settings; fi
        
        echo "LORENE: Building..."
        # Note that this builds two versions of the library, a
        # "regular" version and a "debug" version.  Both are identical
        # (since we specified identical build options above), and we
        # ignore the "debug" version.
        ${MAKE} cpp fortran export
        
        echo "LORENE: Installing..."
        mv ${BUILD_DIR}/${NAME}/Lib                ${INSTALL_DIR}
        mkdir ${INSTALL_DIR}/C++
        mv ${BUILD_DIR}/${NAME}/C++/Include        ${INSTALL_DIR}/C++
        mkdir ${INSTALL_DIR}/Export
        mkdir ${INSTALL_DIR}/Export/C++
        mv ${BUILD_DIR}/${NAME}/Export/C++/Include ${INSTALL_DIR}/Export/C++
        popd
        
        echo "LORENE: Cleaning up..."
        rm -rf ${BUILD_DIR}
        
        date > ${DONE_FILE}
        echo "LORENE: Done."
        )
        
        if (( $? )); then
            echo 'BEGIN ERROR'
            echo 'Error while building LORENE. Aborting.'
            echo 'END ERROR'
            exit 1
        fi
    fi
    
fi



################################################################################
# Configure Cactus
################################################################################

# Set options
LORENE_INC_DIRS="${LORENE_DIR}/Export/C++/Include ${LORENE_DIR}/C++/Include"
LORENE_LIB_DIRS="${LORENE_DIR}/Lib ${LORENE_EXTRA_LIB_DIRS}"
LORENE_LIBS="lorene_export lorene lorenef77 ${LORENE_EXTRA_LIBS}"

# Pass options to Cactus
echo "BEGIN MAKE_DEFINITION"
echo "HAVE_LORENE     = 1"
echo "LORENE_DIR      = ${LORENE_DIR}"
echo "LORENE_INC_DIRS = ${LORENE_INC_DIRS}"
echo "LORENE_LIB_DIRS = ${LORENE_LIB_DIRS}"
echo "LORENE_LIBS     = ${LORENE_LIBS}"
echo "HOME_LORENE     = ${LORENE_DIR}"
echo "END MAKE_DEFINITION"

echo 'INCLUDE_DIRECTORY $(LORENE_INC_DIRS)'
echo 'LIBRARY_DIRECTORY $(LORENE_LIB_DIRS)'
echo 'LIBRARY           $(LORENE_LIBS)'