I can't reproduce this on Karmic with a source install, but I can on OSX.
The culprit appears to be pluginlib (used by filters/laser_filters), which
exposes use of Boost.Filesystem in its header but does not add the
Boost.System link flags in its exports.

I've filed a ticket: https://code.ros.org/trac/ros-pkg/ticket/4013

Josh

On Wed, Apr 21, 2010 at 11:45 AM, Brian Gerkey <gerkey@willowgarage.com>wrote:

> On Wed, Apr 21, 2010 at 5:09 AM, Robbie Plankenhorn
> <rplankenhorn@gmail.com> wrote:
> > My package depends on:
> > laser_filters
> > sicktoolbox
> > std_msgs
> > roscpp
> > sensor_msgs
> > visualization_msgs
> > filters
>
> I don't see anything in those packages that should be creating
> undefined references to boost::system.  roscpp uses boost::system, but
> only internally, and libros.so is linked against libboost_system,
> which should work fine.
>
> I could provide more help if you send the verbose output from trying
> to build your package:
>  VERBOSE=1 make
>
>        brian.
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