I was emerging amarok, when the config stopped. libmpc was missing and portage didn't install it before compiling xine-lib, so I had to emerge it manually. libmpc is in the musepack-tools package. Hope that you'll fix that soon because xine-lib is required if you want to compile gnome! Angelo Del Regno
IIRC, it was gstreamer, not xine-lib. Attach build log (probably config.log too).
That's a bit minimal - if it is still an issue please provide the emerge -pv <package> and the failure log.