Add missing build_export_depend dependency

[Blast545]

Follow up PR to #660.
This PR is failing in the cyclonedds jobs, starting from this one: https://build.ros2.org/view/Rci/job/Rci__nightly-cyclonedds_ubuntu_focal_amd64/608/

I'm not sure if this is exactly the cause of the problem, I'll run a couple of tests before removing draft mode into this PR.
FYI: @sloretz

Signed-off-by: Jorge Perez jjperez@ekumenlabs.com

[Blast545]

Trying to replicate on ci.ros2.org, using only cyclonedds and up-to rosidl_generator_py:

Running same parameters with this PR:

[Blast545]

CI tests worked fine, running standard full CI:

• Linux
• Linux-aarch64
• Windows

[clalancette]

Could you explain a little more why you think this is the correct fix? Looking at the python code in here, there are no direct references to rosidl_runtime_cpp. There are references to rosidl_runtime_cpp in the tests, but that should be covered by the existing test_depend. There are also references to rosidl_runtime_cpp in the empy templates, which suggests to me that maybe this should be a build_export_depend instead. @sloretz any thoughts?

[Blast545]

@clalancette The lines of code generating this issue come from #660, in particular https://github.com/ros2/rosidl/blob/master/rosidl_generator_cpp/cmake/rosidl_generator_cpp_generate_interfaces.cmake#L119-L121

I wasn't sure if build_export_depend was enough in this case and tried with exec_depend. I can change this PR to use build_export_depend instead.

[sloretz]

I wasn't sure if build_export_depend was enough in this case and tried with exec_depend. I can change this PR to use build_export_depend instead.

build_export_depend should be enough since rosidl_runtime_cpp is a header only library.

rosidl/rosidl_runtime_cpp/CMakeLists.txt

Line 7 in 90a74c3

add_library(${PROJECT_NAME} INTERFACE)

[Blast545]

Re running exploratory check:

[clalancette]

Looks good with green CI, thanks!

[Blast545]

Full CI:

• Linux
• Linux-aarch64
• Windows

[Blast545]

Warnings not related to this PR, merging, thanks for the feedback!