Hi all,

Can't work out if this is a problem on our end, or something in catkin. Especially since I can't track down a similar example. I didn't notice us having problems building until releasing. And then noticed people were building it twice to get it to work.

Problem: package kobuki_auto_docking depends on actions in kobuki_msgs but when catkin building them together, the actions aren't getting built in time.

Scanning dependencies of target kobuki_auto_docking_ros

[ 70%] Generating Python msg __init__.py for kobuki_msgs

[ 71%] Generating C++ code from kobuki_msgs/WheelDropEvent.msg

make[3]: Leaving directory `/opt/kobuki/debug/build'

[ 71%] Built target kobuki_msgs_genpy

[ 72%] make[3]: Entering directory `/opt/kobuki/debug/build'

Generating C++ code from kobuki_msgs/AutoDockingAction.msg

[ 73%] Building CXX object kobuki/kobuki_auto_docking/CMakeFiles/kobuki_auto_docking_ros.dir/src/auto_docking_ros.cpp.o

make[3]: Entering directory `/opt/kobuki/debug/build'

Scanning dependencies of target kobuki_bumper2pc_nodelet

make[3]: Leaving directory `/opt/kobuki/debug/build'

[ 74%] make[3]: Entering directory `/opt/kobuki/debug/build'

Generating C++ code from kobuki_msgs/AutoDockingActionFeedback.msg

[ 75%] Building CXX object kobuki/kobuki_bumper2pc/CMakeFiles/kobuki_bumper2pc_nodelet.dir/src/kobuki_bumper2pc.cpp.o

[ 76%] Generating C++ code from kobuki_msgs/AutoDockingActionGoal.msg

[ 76%] Generating C++ code from kobuki_msgs/AutoDockingActionResult.msg

In file included from /opt/kobuki/debug/devel/include/kobuki_msgs/AutoDockingAction.h:51:0,

from /opt/kobuki/src/kobuki/kobuki_auto_docking/include/kobuki_auto_docking/auto_docking_ros.hpp:22,

from /opt/kobuki/src/kobuki/kobuki_auto_docking/src/auto_docking_ros.cpp:13:

/opt/kobuki/debug/devel/include/kobuki_msgs/AutoDockingActionGoal.h:53:41: fatal error: kobuki_msgs/AutoDockingGoal.h: No such file or directory

compilation terminated.

[ 77%] Generating C++ code from kobuki_msgs/AutoDockingFeedback.msg

[ 78%] Generating C++ code from kobuki_msgs/AutoDockingGoal.msg

[ 80%] Building CXX object kobuki/kobuki_driver/src/driver/CMakeFiles/kobuki.dir/core_sensors.cpp.o

[ 81%] Generating C++ code from kobuki_msgs/AutoDockingResult.msg

make[3]: Leaving directory `/opt/kobuki/debug/build'

[ 81%] Built target kobuki_msgs_gencpp

Now, the package.xml and CMakeLists.txt make all the appropriate dependencies on kobuki_msgs, but the kobuki_msgs_gencpp target is simply not getting added as a dependency to kobuki_auto_docking_ros. Now, this fixes itself if you add the following line in CMakeLists.txt:

add_dependencies(kobuki_auto_docking_ros kobuki_msgs_gencpp)

Is this supposed to work like this? I don't know if it's possible or 'correct' to get the catkin model to do this anywhere automatically, but I have to admit, it feels awkward having to handle dependencies now. You have to remember to track them in several places - i.e. in package.xml, in find_package, in CATKIN_DEPENDS and now here also.

Daniel.

PS I have a simple std_msgs/talker example of the above if necessary.