Hi, Thanks for the answer, as I'm quite new into bug reporting, I also reported the same bug for libgrib-api0 (so you want close one).
I wonder why these libraries appears in bullseye as they are, as you say, obsolete. Is there an explanation (just curiosity)? And if the purpose of theses packages is to achieve a kind of compatibility with old software, shouldn't they be supported at list in the distribution? Again just curiosity for learning purpose, you don't have to reply to this. Thanks again for all the work you achieve(d).