# revdep-rebuild --library '/lib64/libarchive.so.2'
 * Configuring search environment for revdep-rebuild

 * Checking reverse dependencies
 * Packages containing binaries and libraries using /lib64/libarchive.so.2
 * will be emerged.

 * Collecting system binaries and libraries
 * Generated new 1_files.rr
 * Checking dynamic linking
[ 1% ]  *   found /lib64/bin/bsdcpio
 *   found /lib64/bin/bsdtar
[ 7% ]  *   found /usr/bin/ccmake
[ 8% ]  *   found /usr/bin/cmake
 *   found /usr/bin/cmake-gui
 *   found /usr/bin/cpack
 *   found /usr/bin/ctest
[ 69% ]  *   found /usr/lib64/libtotem-plparser.so.17.0.1
[ 94% ]  *   found /usr/libexec/gvfsd-archive
[ 100% ]
 * Generated new 3_broken.rr
 * Assigning files to packages
 *  !!! /lib64/bin/bsdcpio not owned by any package is broken !!!
 *   /lib64/bin/bsdcpio -> (none)
 *  !!! /lib64/bin/bsdtar not owned by any package is broken !!!
 *   /lib64/bin/bsdtar -> (none)
 *   /usr/bin/ccmake -> dev-util/cmake
 *   /usr/bin/cmake -> dev-util/cmake
 *   /usr/bin/cmake-gui -> dev-util/cmake
 *   /usr/bin/cpack -> dev-util/cmake
 *   /usr/bin/ctest -> dev-util/cmake
 *   /usr/lib64/libtotem-plparser.so.17.0.1 -> dev-libs/totem-pl-parser
 *   /usr/libexec/gvfsd-archive -> gnome-base/gvfs
 * Generated new 4_raw.rr and 4_owners.rr
 * Cleaning list of packages to rebuild
 * Generated new 4_pkgs.rr
 * Assigning packages to ebuilds
 * Generated new 4_ebuilds.rr
 * Evaluating package order
 * Generated new 5_order.rr
 * All prepared. Starting rebuild
emerge --complete-graph=y --oneshot --rebuild-if-new-ver=n --rebuild-if-new-rev=n --quiet-build=y --fail-clean=n --autounmask-write=y --autounmask --jobs=1 --keep-going --load-average=2 --verbose  dev-libs/totem-pl-parser:0 dev-util/cmake:0 gnome-base/gvfs:0
..........

These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild   R    ] dev-util/cmake-2.8.6-r4  USE="ncurses qt4 vim-syntax -emacs -test" 0 kB
[ebuild   R    ] dev-libs/totem-pl-parser-2.32.6-r1  USE="archive introspection quvi -doc" 0 kB
[ebuild   R    ] gnome-base/gvfs-1.10.1  USE="archive avahi bluetooth cdda fuse gdu gnome-keyring http ios samba udev -afp -bluray -doc -gphoto2" 0 kB

Total: 3 packages (3 reinstalls), Size of downloads: 0 kB

>>> Verifying ebuild manifests
>>> Starting parallel fetch
>>> Emerging (1 of 3) dev-util/cmake-2.8.6-r4
>>> Installing (1 of 3) dev-util/cmake-2.8.6-r4
>>> Emerging (2 of 3) dev-libs/totem-pl-parser-2.32.6-r1
>>> Installing (2 of 3) dev-libs/totem-pl-parser-2.32.6-r1
>>> Emerging (3 of 3) gnome-base/gvfs-1.10.1
>>> Installing (3 of 3) gnome-base/gvfs-1.10.1
>>> Jobs: 3 of 3 complete                           Load avg: 2.30, 1.74, 0.92
>>> Auto-cleaning packages...

>>> No outdated packages were found on your system.

 * GNU info directory index is up-to-date.
 * Build finished correctly. Removing temporary files...
 * You can re-run revdep-rebuild to verify that all libraries and binaries
 * are fixed. Possible reasons for remaining inconsistencies include:
 *   orphaned files
 *   deep dependencies
 *   packages installed outside of portage's control
 *   specially-evaluated libraries
 * Found some broken files that weren't associated with known packages
 * The broken files are:
 *   /lib64/bin/bsdcpio
 *   /lib64/bin/bsdtar