roswtf finds error, flag do not match

edit

hi, I'm using fuerte with Ubuntu 11.10 installed, I use roswtf to examine your ROS setup. I encounter a problem. I type:

dong@dong-Inspiron-N5110:/opt/ros/fuerte/share/roscpp$ roswtf

and

Loaded plugin tf.tfwtf
Package: roscpp
================================================================================
Static checks summary:

Found 1 error(s).

ERROR The following packages have rpath issues in manifest.xml:
 * roscpp: found flag "-L/opt/ros/fuerte/lib", but no matching "-Wl,-rpath,/opt/ros/fuerte/lib"

================================================================================

ROS Master does not appear to be running.
Online graph checks will not be run.
ROS_MASTER_URI is [http://localhost:11311]

What's wrong with the setup?