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ROS2 services not using ament_cmake

I am not using amentcmake and I am having trouble incorporating the .srv files to the CMakeLists.txt. When I do `findpackage(rosidldefaultgenerator_cpp REQUIRED)` It is throwing me a CMake Error:

[cmake]   Could not find a package configuration file provided by
[cmake]   "rosidl_default_generator_cpp" with any of the following names:
[cmake] 
[cmake]     rosidl_default_generator_cppConfig.cmake
[cmake]     rosidl_default_generator_cpp-config.cmake

Likewise, it is saying that the following command is not a cmake command : 

rosidl_generate_interfaces(sensor_ros2wrapper
  ${srv_files}
)

Any help would be greatly appreciated!

Asked by mikepark93 on 2019-12-13 15:20:14 UTC

Comments

Have you declared the dependency on rosidl_default_generator_cpp in your package.xml file?

Asked by Dirk Thomas on 2019-12-13 15:41:39 UTC

I am not using colon as my build tool in my application. I am using cmake for everything and have been manually linking the ros2 libraries. I have no package.xml

Asked by mikepark93 on 2019-12-13 15:47:04 UTC

Then you need to make sure rosidl_default_generator_cpp is findable by CMake, e.g. by setting the appropriate CMAKE_PREFIX_PATH.

Asked by Dirk Thomas on 2019-12-13 15:50:15 UTC

How would I do that? Do I just point it to /opt/ros/dashing (I am using dashing as my distro)

Asked by mikepark93 on 2019-12-16 09:18:32 UTC

Setting the CMAKE_PREFIX_PATH resolved the previous issue, but I am getting another issue now.

[cmake] Found PythonInterp: /usr/bin/python3 (found version "3.6.9") 
[cmake] CMake Error at /opt/ros/dashing/share/rosidl_typesupport_c/cmake/get_used_typesupports.cmake:28 (message):
[cmake]   No RMW implementations found
[cmake] Call Stack (most recent call first):
[cmake] /opt/ros/dashing/share/rosidl_typesupport_c/cmake/rosidl_typesupport_c_generate_interfaces.cmake:65 (get_used_typesupports)
[cmake]   /opt/ros/dashing/share/ament_cmake_core/cmake/core/ament_execute_extensions.cmake:48 (include)
[cmake]   /opt/ros/dashing/share/rosidl_cmake/cmake/rosidl_generate_interfaces.cmake:286 (ament_execute_extensions)
[cmake]   src/common/sensor_ros2wrapper/CMakeLists.txt:84 (rosidl_generate_interfaces)

Asked by mikepark93 on 2019-12-16 17:12:41 UTC

Answers