On the download page for GTK (
http://www.gtk.org/download/linux.php), you list it's dependencies that must first be built and installed before compiling GTK from source. The problem is that gobject-introspection must be installed before building gdk-pixbuf, atk, and pango, or you will end up with cryptic (to me) error messages when you try to make GTK. Thank's for at least calling out your deps on the download page though, that's more than some people. May I suggest moving gobject-introspection upwards on that list, and denoting that the packages should be built and installed in order?
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Sincerely,
Colton Leekley-Winslow
651-242-9559