rosmake error:no such option

Hello, I am recently learning http://wiki.ros.org/openni/Contests/ROS%203D/RGBD-6D-SLAM My system is Ubuntu 12.04 and ros-libfreenect. This is some error I don't know how to fix it: root@ubuntu:~# rosmake --rosdep-install rgbdslam Usage: rosmake [options] [PACKAGE]... rosmake: error: no such option: --rosdep-install Could you help me to try it out? Thank you.