Recently I tried to build trunk on a relatively mature system and got
"undefined reference to 'gtk_adjustment_configure'" error when linking.
This system has 2.12.0 so configure check was passed.  But, according to
https://mail.gnome.org/archives/gtk-devel-list/2008-August/msg00023.html,
gtk_adjustment_configure was introduced in 2.13.6.  So I think that old
code should be resurrected under GTK_CHECK_VERSION.

Dmitry