Kde-base/kigo-4.10.0 should depend on kde-base/libkdegames-4.10.0, does not compile without it.
Thanks, fixed in CVS and git. + 11 Feb 2013; Michael Palimaka <kensington@gentoo.org> kigo-4.10.0.ebuild: + Add missing dependency wrt bug #456688. http://git.overlays.gentoo.org/gitweb/?p=proj/kde.git;a=commit;h=a43b894819b66c16147daafd2a0a9040cc43ae41