virtual/udev is for daemons, for libs virtual/libudev:= should be used.
virtual/libudev is a new thing ;)
should be all set now in the tree; thanks for the report! Commit message: Migrate to virtual/libudev http://sources.gentoo.org/sys-apps/util-linux/util-linux-2.25.2-r2.ebuild?r1=1.2&r2=1.3 http://sources.gentoo.org/sys-apps/util-linux/util-linux-2.26.ebuild?r1=1.2&r2=1.3 http://sources.gentoo.org/sys-apps/util-linux/util-linux-9999.ebuild?r1=1.60&r2=1.61