The configure phase for x11-base/xorg-server-1.9.0 fails when the `doc' USE flag is enabled, but the installed version of app-doc/doxygen is not v1.6.1 or higher. Here's a snippet from the configure phase: --- checking for doxygen... /usr/bin/doxygen checking the doxygen version... 1.5.8 configure: error: doxygen version 1.5.8 found, but 1.6.1 needed ---
Fixed in CVS.