Building telepathy-logger with GCC 14 fails here:
https://build.opensuse.org/package/live_build_log/openSUSE:Factory:Staging:Gcc7/telepathy-logger/standard/x86_64

Due to (exhaustive list of errors):

conf.c: In function 'tpl_conf_constructor':
conf.c:130:14: error: assignment to 'GObject *' {aka 'struct _GObject *'} from incompatible pointer type 'TplConf *' [-Wincompatible-pointer-types]
  130 |       retval = g_object_ref (conf_singleton);
      |              ^


dbus-service.c: In function 'favourite_contact_closure_new':
dbus-service.c:99:20: error: assignment to 'TplDBusService *' from incompatible pointer type 'GObject *' {aka 'struct _GObject *'} [-Wincompatible-pointer-types]
   99 |   closure->service = g_object_ref (G_OBJECT (self));
      |                    ^

log-manager.c: In function 'log_manager_constructor':
log-manager.c:162:12: error: assignment to 'GObject *' {aka 'struct _GObject *'} from incompatible pointer type 'TplLogManager *' {aka 'struct _TplLogManager *'} [-Wincompatible-pointer-types]
  162 |     retval = g_object_ref (manager_singleton);
      |            ^


See the meta bug#1220571 for more info.