Description of problem: GNOME 2 packages are supposed to provide a .pc file to be placed in /usr/lib/pkgconfig so that pkg-config can automatically determine build dependencies. Some packages provide one, glib2 as well as some others do not. Version-Release number of selected component (if applicable): glib2-2.2.1-1
Obviously I needed to install glib2-devel. Sorry for the bogus report.