Stephan,

Can you take this to answers.ros.org?  And in that question there can you
tell us what version of ROS you are using?

I do not get the same behavior as you:

∫ rospack depends geometry_msgs
> cpp_common
> rostime
> roscpp_traits
> roscpp_serialization
> genmsg
> genpy
> message_runtime
> std_msgs


--

P.S. in the future please follow the getting help guidelines:

http://ros.org/wiki/Support

Thanks,

On Thu, Jan 24, 2013 at 6:49 AM, Stephan Opfer <opfer@vs.uni-kassel.de>wrote:

> Hi,
>
> I have some problem in understanding the consistency of the output of the
> following two commands:
>
> $rospack depends geometry_msgs:
> <nothing>
>
> $rosmsg packages Header
> ...
> gazebo_msgs
> gazebo_plugins
> geometry_msgs <--
> hpPackage
> ...
>
> So geometry_msgs is using the Header message from std_msgs, but
> geometry_msgs does not depend on std_msgs. One example of using the Header
> message is geometry_msgs/TwistStamped:
>
> $rosmsg show geometry_msgs/TwistStamped
> std_msgs/Header header
>   uint32 seq
>   time stamp
>   string frame_id
> geometry_msgs/Twist twist
>   geometry_msgs/Vector3 linear
>     float64 x
>     float64 y
>     float64 z
>   geometry_msgs/Vector3 angular
>     float64 x
>     float64 y
>     float64 z
>
> Isn't it a bug?
>
> Best Regards,
>   Stephan
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-- 
William Woodall
Willow Garage - Software Engineer
wwoodall@willowgarage.com