ObjFW  Diff

			if test x"$plugin" = x"yes"; then
				echo "You can't use --lib and --plugin!"
				exit 1
			fi

			shift

			if ! echo "$1" | grep "^[0-9]\+\.[0-9]\+" >/dev/null
			if ! echo "$1" | grep "^[0-9]\+\.[0-9]\+$" >/dev/null
			then
				echo "$1 is not a valid library version!"
				exit 1
			fi

			export LIB_MAJOR="${1%.*}"
			export LIB_MINOR="${1#*.}"