From: Josh Faust <jfaust@willowgarage.com> To: User discussions <ros-users@code.ros.org> Sent: Thursday, October 7, 2010 5:32:06 Subject: Re: [ros-users] Communicating between two user created packages
undefined reference to `my_namespace::X::X()`
You need to add the linker flags to the exports as well. For example, from roslib: