The dependencies for app-emulation/spim need to be fixed for the transition to modular X.org (see http://www.gentoo.org/proj/en/desktop/x/x11/porting-modular-x-howto.xml). The attached patch does that.
Created attachment 77280 [details, diff] modular X patch for app-emulation/spim ebuild
*** This bug has been marked as a duplicate of 105542 ***