error while installing ros groovy on ubuntu 12.04 armel

edit

Hello, I want to install ROS groovy from source on ubuntu armel 12.04 according to this page http://wiki.ros.org/groovy/Installati... . I have download the ros-comm to /ros_catkin_ws/src. Than run :

$rosdep install --from-paths src --ignore-src --rosdistro groovy -yr

I get the following error

 executing command [sudo apt-get install -y python-rospkg]
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package python-rospkg
executing command [sudo apt-get install -y python-catkin-pkg]
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package python-catkin-pkg
executing command [sudo apt-get install -y sbcl]
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package sbcl is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
However the following packages replace it:
  sbcl-source sbcl-doc

E: Package 'sbcl' has no installation candidate
executing command [sudo apt-get install -y python-rosdep]
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package python-rosdep
ERROR: the following rosdeps failed to install
  apt: command [sudo apt-get install -y python-rospkg] failed
  apt: command [sudo apt-get install -y python-catkin-pkg] failed
  apt: command [sudo apt-get install -y sbcl] failed
  apt: command [sudo apt-get install -y python-rosdep] failed
  apt: Failed to detect successful installation of [python-rospkg]
  apt: Failed to detect successful installation of [python-catkin-pkg]
  apt: Failed to detect successful installation of [sbcl]
  apt: Failed to detect successful installation of [python-rosdep]

In fact, I have successfully installed rospkg , catkin-pkg and rosdep. So,I install them again.

$sudo pip install rospkg catkin-pkg rosdep

I got the following:

Requirement already satisfied (use --upgrade to upgrade): rospkg in /usr/local/lib/python2.7/dist-packages
Requirement already satisfied (use --upgrade to upgrade): catkin-pkg in /usr/local/lib/python2.7/dist-packs
Requirement already satisfied (use --upgrade to upgrade): rosdep in /usr/local/lib/python2.7/dist-packages

Please help me to solve this problem. thank you very much.