I don't think I implemented support for moving the ~ files as the autotools target did.
It's been several months, and I haven't heard any votes in favor of this, so I'm going to mark it WONTFIX. We'll reopen if there's a request for this target.
Just like the cscope target in AVRO-471. Is anyone using this target in the autotools build? I haven't missed it in the CMake builds. And the project-wide build.sh script never calls it.