deja-dup-14.0.2 tarball does not build with -DGSEAL_ENABLE. See http://live.gnome.org/GnomeGoals/UseGseal .
This is required for upcoming GNOME 3.0.
[Note that maybe this report cannot be fixed yet, as GTK+ still misses some accessor functions (see GNOME Bugzilla bugs 588389 and 597610) needed for sealing. Also see http://live.gnome.org/GTK%2B/3.0/PendingSealings for current status.]
The output posted here of course only lists the very first error when trying to compile:
ConfigLocation.c: In function ‘deja_dup_config_location_constructor’:
ConfigLocation.c:649: error: ‘GtkDialog’ has no member named ‘action_area’
make: *** [ConfigLocation.lo] Error 1
make: Leaving directory `/home/andre/svn-gnome/deja-dup-14.0.2/widgets'
make: *** [all] Error 2