I just completed a world build and the situation is not that bad currently, the summary of the failures are listed below.
libsndfile1_1.0.17 - Failed in compilation of flac.c loudmouth_1.4.0 - Failed in compilation of asyncns.c - asyncns.c:159:14: error: static declaration of 'strndup' follows non-static declaration plugin-evolution2_0.36 - Failed in do_configure CMake Error at cmake/modules/FindEPackage.cmake:166 (MESSAGE): Evolution Data Server not found. Call Stack (most recent call first): CMakeLists.txt:9 (FIND_PACKAGE) clutter-gtk-0.10_git - Failed during linking ohm_git - Failed during compilation of ohm-plugin-dpms.c - missing X11/extensions/dpmsstr.h git_1.7.2.1 - Failed during do_configure - Need a configure update for checking of "fopen'ed directory" openswan_2.4.7 - Failed during compilation of optionsfrom.c - optionsfrom.c:34:14: error: conflicting types for 'getline' clutter-gtk-1.0_git - Failed during linking gnome-terminal_2.26.3 - Failed during linking matchbox-themes-extra_svn - Failed during install with an overwrite error - will not overwrite just-created `/intel/poky/demo/build/tmp/work/core2-poky-linux/matchbox-themes-extra-0.3+svnr1524-r0/image/usr/share/themes/mbcrystal/matchbox/theme.desktop' with `theme.desktop' libapplewm_1.0.0 - Failed during compilation of applewm.c - missing X11/extensions/applewmstr.h telepathy-idle_0.1.2 - Failed during compilation of idle-connection.c