set -e
if test -n "$BASH_VERSION"; then set -o posix; fi


# See https://www.gnu.org/prep/standards/html_node/Directory-Variables.html
prefix=/usr/local
exec_prefix='$(PREFIX)'
bindir='$(EXEC_PREFIX)/bin'
host=


main() {
    parseArgs "$@"
    echo TODO create Makefile
}


printHelp() {
    echo ''
    echo "Example usage:   $0 --prefix /usr/local"
    echo ''
    echo 'Options:'
    echo '    --prefix <path>      Default "/usr/local"'
    echo '    --bindir <path>      Default "$(EXEC_PREFIX)/bin"'
    echo '    --host <name>        Default <empty> (Eg "x86_64-w64-mingw32")'
    echo ''
}


parseArgs() {
    # See: https://stackoverflow.com/a/14203146/4415884
    while test $# -gt 0 ; do
        case $1 in
            --help)        printHelp; exit 1; ;;
            --prefix)      prefix="$2"      shift; shift; ;;
            --exec_prefix) exec_prefix="$2" shift; shift; ;;
            --bindir)      bindir="$2"      shift; shift; ;;
            --host)        host="$2"        shift; shift; ;;
            *) echo "[ERROR] Unexpected argument: $1" exit 1 ;;
        esac
    done
}


main "$@"