rename ament_export_interfaces to ament_export_targets

[dirk-thomas]

"interfaces" has another meaning in the ROS IDL context which can be misleading. Therefore I proposed to rename the existing API to use the term "targets" instead.

For the actual change the existing API can be kept but deprecated.

[jacobperron]

I don't think that the meanings between the ament command and the rosidl command are confusing since the packages are responsible for two completely different things (they are already segmented in my mind). If anything, the command rosidl_generate_interfaces may be more confusing as it is a CMake function not referring to CMake interfaces.

That being said, I'm not opposed to renaming ament_export_interfaces as proposed.

[dirk-thomas]

See https://gitlab.com/micro-ROS/ros_tracing/ros2_tracing/-/merge_requests/163

[dirk-thomas]

FastRTPS-only builds since neither of the RMW impl. packages uses that symbol anyway:

• Linux
  • the additional CMake warning is resolved once https://gitlab.com/micro-ROS/ros_tracing/ros2_tracing/-/merge_requests/163 is merged and a new version released
• Linux-aarch64
• macOS
• Windows (unrelated failure)