Bug#1018111: libchamplain: depends on discontinued library clutter-1.0

[Simon McVittie]

Source: libchamplain
Version: 0.12.20-1
Severity: important
Tags: bookworm sid upstream wontfix
User: pkg-gnome-maintainers at lists.alioth.debian.org
Usertags: oldlibs clutter
Control: block 996690 by -1

libchamplain depends on clutter-1.0, which is no longer maintained
upstream. libchamplain probably doesn't have a whole lot of future
either.

The recommended replacement for libchamplain is libshumate, a "friendly
fork" of libchamplain that uses GTK 4 instead of GTK 3 and Clutter. Apps
need to be ported from GTK 3 to GTK 4 and from libchamplain to libshumate
at the same time.
https://gitlab.gnome.org/GNOME/gnome-maps/-/issues/353 is an example of
this process.

    smcv