title: Undefined symbols compiling GTK+ 3 with ATK 2.2.0 on CentOS 6
body: <p>I'm trying to compile GTK+ 3 with ATK 2.2.0 on CentOS, but am getting an error with atk_window_get_type:</p>
  
  <pre><code>make[4]: Entering directory `/home/mms/Source/gtk+/gtk'
    GISCAN Gtk-3.0.gir
  /home/mms/Source/gtk+/gtk/tmp-introspectRXT5FI/.libs/lt-Gtk-3.0: symbol lookup error: /home/mms/Source/gtk+/gtk/.libs/libgtk-3.so.0: undefined symbol: atk_window_get_type
  Command '['/home/mms/Source/gtk+/gtk/tmp-introspectRXT5FI/Gtk-3.0', '--introspect-dump=/home/mms/Source/gtk+/gtk/tmp-introspectRXT5FI/functions.txt,/home/mms/Source/gtk+/gtk/tmp-introspectRXT5FI/dump.xml']' returned non-zero exit status 127
  </code></pre>
  
  <p>As far as I can see it's declared in atk/atkwindow.h but is never defined, but there doesn't seem to be anyone else with this issue so I'm wondering why it's affecting me?</p>