I searched but apparently this has not yet been discussed anywhere below lists.debian.org.
My package ships two convenience copies from autoconf-archive in it's m4 folder. Should I a) leave these files and add the corresponding data to d/copyright or b) leave these files and don't bother about d/copyright or c) remove these files and add build-depend on autoconf-archive, linking the files before dh_autoreconf? Apparently I'm not the only one with uncertainty here: https://bugs.debian.org/949119 Thanks for your guidance, Thomas