There are two parallel-installable series of libsigc++, cairomm, glibmm,
pangomm, atkmm and gtkmm, one stable, the other extremely unstable. This
situation has been going on for a couple of years. It has now and then
resulted in Bugzilla bugs and GitLab issues from people who have tried
to use packages from the unstable series, and been totally confused. No
wonder, the situation /is/ confusing.
The stable series:
_pkg-config mod-name__Latest released version__Git branch_
sigc++-2.0 2.10.2 libsigc++-2-10
cairomm-1.0 1.13.1 cairomm-1-14
glibmm-2.4 2.62.0 glibmm-2-62
pangomm-1.4 2.42.0 pangomm-2-42
atkmm-1.6 2.28.0 atkmm-2-28
gtkmm-3.0 3.24.2 gtkmm-3-24
Packages from these series are compatible with gtk+-3.0. Apart from
cairomm-1.0, they have even minor version numbers.
The unstable series, which has caused so much confusion, is (sometimes)
compatible with gtk4, which is still very unstable. Both ABI and API are
constantly changing. Classes and functions can be deleted or modified.
The unstable series:
_pkg-config mod-name__Latest released version__Git branch__Tarball
compatibility_
sigc++-3.0 3.0.2 (stable) master
cairomm-1.16 1.15.5 master
glibmm-2.60 2.59.1 master
glibmm-2.62 2.61.1 master
glibmm-2.64 2.63.1 master
pangomm-2.44 2.43.1 master glibmm 2.59.1
atkmm-2.30 2.29.1 master glibmm 2.59.1
gtkmm-4.0 3.95.1 master glibmm 2.61.1,
gtk4 3.96.0
The NEWS files of the unstable releases contain the sentence: /Distro
packagers should probably not package this yet./ The only reason I can
see to use these unstable versions now is if you want to prepare for
using gtk4 and gtkmm-4.0. And then you're better off if you build from
the tips of the master branches in the git repo. It's difficult or
impossible to find tarballs of all these packages that can be used
together with each other and with a gtk4 tarball.
What makes these unstable versions so confusing is probably that
cairomm, glibmm, pangomm and atkmm break ABI without increasing the
major version number. That's because the underlying C packages, cairo,
glib, pango and atk, do not break ABI.
Kjell Ahlstedt
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