We should make the gtk-based consumer work with
gtk2 (instead of 1.2) most notably
to use 'pkg-config' instead of 'gtk-config', 'xml2-config' etc...

see:
http://mail.gnome.org/archives/gtk-list/2003-October/msg00319.html

>>>> excerpt from the previously referenced mail

pkg-config --cflags gtk+-2.0

and

pkg-config --libs gtk+-2.0

pkg-config replaces all the old "*-config" scripts with a consistent and
sane script that finds them all.  Be aware that you should install gtk2
from rpms.  If you don't then pkg-config won't find the flags unless you
explicitly point it at the place where gtk2 installed it's .pc file.