DEPS=""

PK_DIRNAME="libpng-1.6.25"

pkdownload() {

    if ! wget "ftp://ftp.simplesystems.org/pub/libpng/png/src/libpng16/libpng-1.6.25.tar.xz"; then

        return 1

    fi

}

pkunpack() {

    if ! tar -xf "$2/$PK_DIRNAME.tar.xz"; then

        return 1

    fi

}

pkbuild() {

    cd "$1/$PK_DIRNAME"

    if ! ./configure "-prefix=$3" && make; then

        return 1

    fi

}

pkinstall() {

    cd $2

    if ! make install; then

        return 1

    fi

}