emerge -pvuD world
These are the packages that would be merged, in order:
Calculating world dependencies... done!
[blocks B ] sys-apps/coldplug (is blocking sys-fs/udev-103)
[blocks B ] >=sys-fs/udev-089 (is blocking sys-apps/coldplug-20040920-r1)
[ebuild U ] sys-apps/man-pages-2.41 [2.39] USE="nls" 1,774 kB
[ebuild U ] sys-fs/udev-103 [087-r1] USE="(-selinux)" 195 kB
[ebuild U ] sys-devel/binutils-config-1.9-r3 [1.9-r2] 0 kB
[ebuild U ] app-text/libpaper-1.1.21 [1.1.20] 342 kB
Total size of downloads: 2,312 kB