Errors when including rospack/rospack.h

[bit-pirate]

I wanted to use the Rospack class from rospack, but once I included the header, I got the following error:

/opt/ros/hydro/include/rospack/rospack.h:521:1: error: expected identifier before string constant
/opt/ros/hydro/include/rospack/rospack.h:521:1: error: expected ‘,’ or ‘...’ before string constant
/opt/ros/hydro/include/rospack/rospack.h:520:10: error: invalid use of ‘::’
/opt/ros/hydro/include/rospack/rospack.h:529:1: error: expected identifier before string constant
/opt/ros/hydro/include/rospack/rospack.h:529:1: error: expected ‘,’ or ‘...’ before string constant
/opt/ros/hydro/include/rospack/rospack.h:528:10: error: invalid use of ‘::’

[tfoote]

For reference I believe it's this line: https://github.com/ros/rospack/blob/indigo-devel/include/rospack/rospack.h#L521

This sounds like a symbol collision. Do you have the problem if you include rospack.h alone or first?

[dirk-thomas]

Could you please provide more information? E.g. a simple main.cpp file which exhibits the problem.

[bit-pirate]

Could you please provide more information? E.g. a simple main.cpp file which exhibits the problem.

Sure, see below. The strange thing is, there seems to be a conflict with rosbag. Including rospack after a header from rosbag leads to the reported error. Including it before works fine.

#include <ros/ros.h>
#include <rosbag/bag.h> // or <rosbag/view.h>
#include <rospack/rospack.h>

int main (int argc, char** argv)
{
  ros::init(argc, argv, "rospack_test");
  return 0;
}

[dirk-thomas]

This is sadly nothing rospack can address. console_bridge (which is used by rosbag internally defines e.g. logWarn (https://github.com/ros/console_bridge/blob/7aebc3367b4945d9963457549026ea137b047b7b/include/console_bridge/console.h#L68) which collides with the already long existing API of rospack.

I have filled a ticket against ros/console_bridge#18. I will mark this as closed since we can't just change the rospack API because of that.