Build errror

[slmat27]

I am having a problem with building px4_ros_com package, I am using Ubuntu 18.04, with ROS Melodic and ROS2 Crystal, followed these setup steps:

1. Clone https://github.com/PX4/px4_ros_com master branch to a ROS2 workspace;
2. Clone https://github.com/PX4/px4_msgs master branch to the same ROS2 workspace;
3. Clone https://github.com/PX4/px4_ros_com ros1 to a ROS1 workspace;
4. Clone https://github.com/PX4/px4_msgs ros1 branch to the same ROS1 workspace;
5. Installed Fast RTPS using the steps over here https://dev.px4.io/en/setup/fast-rtps-installation.html

Steps to reproduce issue:

• Terminal A in <ros1_ws_dir>:

  • source /opt/ros/melodic/setup.bash
  • colcon build

• Terminal B in <ros2_ws_dir>:

  • source /opt/ros/melodic/setup.bash
  • source /opt/ros/crystal/setup.bash
  • export ROS2_DISTRO=$ROS_DISTRO
  • colcon build
    • px4_msgs build is completed successfully
    • px4_ros_com build fails and trigger the below error
      • generate_microRTPS_bridge.py: error: argument -f/--fastrtpsgen-dir: expected one argument

Thanks once again!

[TSC21]

Where do you have fastrtpsgen on your system?

[slmat27]

@TSC21 it is in /usr/local/bin/fastrtpsgen

[christianrauch]

You may need to set FASTRTPSGEN_DIR via export FASTRTPSGEN_DIR=/usr/local/bin/ before calling colcon. See also: https://dev.px4.io/en/middleware/micrortps.html#agent-not-builtfastrtpsgen-is-not-found.

[TSC21]

@slmat27, @christianrauch gave you the correct answer.