RFC: Require Cairo for building
Remove the --enable-cairo-backend configure option, requiring to always compile with Cairo. This ensures that all users can test the experimental Cairo backend (including users of Linux distribution packages, whose maintainers might not have noticed the configure option), and prepares for potentially switching to Cairo by default in the future.
See proposal at https://lists.gnu.org/archive/html/lilypond-devel/2022-09/msg00036.html
Edited by Jean Abou Samra