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#!/bin/bash
with_x11="/usr/X11/lib"
with_sm="/usr/local/sm"
fflags=(-Wall -Wextra -ff2c -fdefault-double-8 -fdefault-real-8)

gcc_version=$(gcc --version | head -n 1 | awk -F' ' '{ print $3 }')
gcc_major="${gcc_version%%\.*}"

if (( $gcc_major >= 10 )); then
    fflags+=(--allow-argument-mismatch)
fi

argv=()
for x in $@; do
    if [[ "$x" =~ .*=.* ]]; then
        key="${x%=*}"
        value="${x#*=}"
        argv+=($key)
        argv+=($value)
    else
        argv+=(x)
    fi
done


i=0
nargs=${#argv[@]}
while [[ $i < $nargs ]]; do
    key="${argv[$i]}"
    value="${argv[$i+1]}"
    case "$key" in
        --prefix)
            prefix="$value"
            (( i++ ))
            ;;
        --bindir)
            bindir="$value"
            (( i++ ))
            ;;
        --datadir)
            datadir="$value"
            (( i++ ))
            ;;
        --with-x11)
            with_x11="$value"
            (( i++ ))
            ;;
        --with-sm)
            with_sm="$value"
            (( i++ ))
            ;;
    esac
    (( i++ ))
done

[[ -z "${prefix}" ]] && prefix="/usr/local"
[[ -z "${bindir}" ]] && bindir="${prefix}/bin"
[[ -z "${datadir}" ]] && datadir="${prefix}/share/moog"
fflags="${fflags[@]}"
sed "s|@PREFIX@|${prefix}|g;\
    s|@BINDIR@|${bindir}|g;\
    s|@DATADIR@|${datadir}|g;\
    s|@FFLAGS@|${fflags}|g;\
    s|@WITH_X11@|${with_x11}|g;\
    s|@WITH_SM@|${with_sm}|g;\
    " Makefile.in > Makefile
sed "s|@MOOGPATH_DEFAULT@|${datadir}/|" Moog.f.in > Moog.f

printf "
Configured with:

Installation prefix ... %s
X11 library ........... %s
SuperMongo library .... %s

Run 'make' to compile
Run 'make install' to install

" $prefix $with_x11 $with_sm