Question about new content in Alpha7 CMakeList files

[Brad Baillio]

if(NOT target_suffix STREQUAL "")
    get_rclcpp_information("${rmw_implementation}" "rclcpp${target_suffix}")
  endif()

I see this appearing in the rclcpp example CMakeLists files, and I'm curious what it's function is and if I should be using them in my files.

I've noticed strange(bad) linking behavior when I add it.

Thanks.

[Dirk Thomas]

Hi Brad,

the best resource is probably the docblock of the function: https://github.com/ros2/rclcpp/blob/master/rclcpp/cmake/get_rclcpp_information.cmake#L16-L24

You will only want to use this function if you want to build your targets for multiple rmw implementations. In general you just want to choose a single rmw implementation and then only depend on `rclcpp` (and don't care about the suffix).

Cheers,

- Dirk