Looking for the contents of :

https://code.ros.org/svn/ros-pkg/stacks/visualization_common/tags/cturtle/ogre/

There aren't the folder /ogre/lib/pkgconfig/ with :

OGRE.pc, `OGRE-RTShaderSystem.pc,

as it is present at :

file:///opt/ros/cturtle/stacks/visualization_common/ogre/ogre/lib/pkgconfig