use add_compile_options instead of setting only cxx flags #59
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We can now compile the C generated code with -Wpedantic (see ros2/ros2#567 (comment) for additional context).
I have a similar commits for all message packages, I am planning on getting the changes reviewed here and then push the other identical commits directly.
This does not supersede the work from ros2/ros2#567 that will eventually replace the way compile options are passed, but I figured I'd open this as I already had all the changes to confirm that ros2/rosidl_python#10 allowed us to compile with pedantic.
Below CI for all the
add_compile_options
branches.None:
Release:
Debug: