On Fri, 11 Mar 2022, Steve Langasek wrote:
Upstream has fixed this bug. Attached is a debdiff of what I've uploaded to Ubuntu to fix the build failure, cherry-picking <http://hg.code.sf.net/p/tboot/code/rev/1d7d6d196bb1>.
Thanks for the info. I was actually already preparing a new upstream release in https://salsa.debian.org/debian/tboot but am currently troubleshooting one more bug on the upstream mailing list.
-Timo