[Jean]
What kind of next version, next minor of current stable, i.e. 2.22.2, or next stable release, 2.24?
Which leads me to ask:
@Jefferson: Would it be conceivable to do Homebrew builds also for (odd-numbered) development versions of LilyPond? LilyPond tends to have a conservative policy regarding stable releases (although the six year hiatus between 2.18.2 in March 2014 and 2.20.0 in March 2020 might be considered extreme even by LilyPond's standards). But at the same time, LilyPond development procedures make sure that today, Master never really breaks: Every patch in master gets a thorough review and, equally important, is tested against an extensive suite of regression tests. Because of this, LilyPond master is kept always in a working condition, and the development releases (which are cut from git master from time to time) can be expected to (although they are not guaranteed to) allow production-quality work. In fact, many LilyPond users routinely use the development versions, as they are the only option (short of do-it-yourself building) to make use of new features in the often long time between stable releases. So if it would be possible to do not only a "lilypond" package but also a (more frequently updated) "lilypond-devel" package, this would match the use practice of many LilyPond users even better.
As for the underlying question, I think a modified version message if LilyPond is running Guile2 (or Guile3, for that matter) would be enough. (And I agree with J.F. that this message should only mention Guile, not Homebrew.) If I understand Jonas's remark correctly, it should make no difference if this is done at compile time via C++ #ifdef GUILEV2 (as in Jean's proposal) or at runtime via Scheme cond-expand, right?
Lukas
