gentoo-overlay/dev-ros/roslaunch/files/roscore.xml.in

<!-- 
  ROS Core Stack definition

  Before making any modifications to this file, please read:
  http://ros.org/wiki/roscore
  -->
<launch>
  <group ns="/">
    <param name="rosversion" value="@PKG_VERSION@" />
    <param name="rosdistro" value="Gentoo" />
    <node pkg="rosout" type="rosout" name="rosout" respawn="true"/>
  </group>
</launch>