EDIT: Thanks to Robert M for having pointed out in the comment section that there…
Canon EOS 5D Mark IV getting c-log2 update?
We have been told (thanks) that Canon may release a firmware upgrade for the Canon EOS 5D Mark IV that features c-log2. We have no hints about when Canon will release the upgrade. For EOS 5D Mark IVs that already have c-log the update should be free.