atk looks for the path to the gnome library on the host. On opensuse 10.2, this is: /opt/gnome/glib-2.0/lib /opt/gnome/glib-2.0/include instead of the more standard /usr/lib /usr/include/glib-2.0 which means that on opensuse 10.2 the gnome library and include files are not found. For distributions using the same location as buildroot, the build will complete, even if the host paths are used, which hides the problem. Setting DSP_CFLAGS and DEP_LIBS seems to have no effect.
More details please. Are you talking about the libatk build for the host or the target? Please paste the exact error messages you get.
No info since May 2009. atk builds fine for the target and the host, on both systems with and without atk development files installed. Please re-open the bug with the .config file and the build log if it still occurs.