building standalone on Ubuntu 22.04 creates error.

[chwu-rwth]

Environment:
Ubuntu 22.04
ROS2 Humble

ros2cs was installed successfully using the --standalone tag.
But as i was trying to build ros2-for-unity, the following error was shown:

-- Using RMW implementation 'rmw_fastrtps_cpp' as default
'patchelf' found in /usr/bin/patchelf
-- Found rmw_cyclonedds_cpp: 0.22.6 (/opt/ros/galactic/share/rmw_cyclonedds_cpp/cmake)
CMake Error at CMakeLists.txt:182 (get_target_property):
get_target_property() called with non-existent target
"rmw_cyclonedds_cpp::rmw_cyclonedds_cpp".
Call Stack (most recent call first):
CMakeLists.txt:230 (fetch_target_lib)
CMakeLists.txt:370 (get_standalone_dependencies)

Finished <<< example_interfaces [3.84s]
-- Configuring incomplete, errors occurred!
See also "/home/student/ros2_ws/ros2-for-unity/build/ros2cs_core/CMakeFiles/CMakeOutput.log".
--- stderr: ros2cs_core
'patchelf' found in /usr/bin/patchelf
CMake Error at CMakeLists.txt:182 (get_target_property):
get_target_property() called with non-existent target
"rmw_cyclonedds_cpp::rmw_cyclonedds_cpp".
Call Stack (most recent call first):
CMakeLists.txt:230 (fetch_target_lib)
CMakeLists.txt:370 (get_standalone_dependencies)

Any help is appreciated.

[pijaro]

It looks like the cmake found a galactic version of cyclone dds in your system. If you are trying to build a humble release, then this is a conflict.

Do you have installed a galactic on Ubuntu 22? Is it sourced before the build?

You can try to install humble version of cyclonedds manually:
sudo apt install ros-humble-rmw-cyclonedds-cpp