gentoo gentoo # emerge -ac

 * Always study the list of packages to be cleaned for any obvious
 * mistakes. Packages that are part of the world set will always
 * be kept.  They can be manually added to this set with
 * `emerge --noreplace <atom>`.  Packages that are listed in
 * package.provided (see portage(5)) will be removed by
 * depclean, even if they are part of the world set.
 *
 * As a safety measure, depclean will not remove any packages
 * unless *all* required dependencies have been resolved.  As a
 * consequence of this, it often becomes necessary to run
 * `emerge --update --newuse --deep @world` prior to depclean.

Calculating dependencies... done!
>>> Calculating removal order...

>>> These are the packages that would be unmerged:

 media-libs/libwebp
    selected: 0.4.0
   protected: none
     omitted: none

 dev-python/beautifulsoup
    selected: 3.2.1-r1
   protected: none
     omitted: none

 dev-python/simplejson
    selected: 3.7.2
   protected: none
     omitted: none

 media-libs/gst-plugins-good
    selected: 1.4.5
   protected: none
     omitted: none

 app-accessibility/speech-dispatcher
    selected: 0.8.1
   protected: none
     omitted: none

 dev-python/jinja
    selected: 2.7.3
   protected: none
     omitted: none

 x11-misc/gxmessage
    selected: 2.20.1
   protected: none
     omitted: none

 dev-libs/re2
    selected: 0_p20140304
   protected: none
     omitted: none

 app-arch/snappy
    selected: 1.1.2-r1
   protected: none
     omitted: none

 dev-libs/jsoncpp
    selected: 0.10.2-r1
   protected: none
     omitted: none

 media-fonts/liberation-fonts
    selected: 2.00.1-r1
   protected: none
     omitted: none

 dev-lang/nasm
    selected: 2.11.08
   protected: none
     omitted: none

 dev-libs/libevent
    selected: 2.0.22
   protected: none
     omitted: none

 dev-perl/JSON
    selected: 2.590.0-r1
   protected: none
     omitted: none

 dev-python/ply
    selected: 3.6-r1
   protected: none
     omitted: none

 dev-libs/libev
    selected: 4.19
   protected: none
     omitted: none

 media-libs/libvpx
    selected: 1.4.0
   protected: none
     omitted: none

 x11-libs/libXinerama
    selected: 1.1.3
   protected: none
     omitted: none

 media-plugins/gst-plugins-libav
    selected: 1.4.5-r2
   protected: none
     omitted: none

 dev-util/ninja
    selected: 1.6.0
   protected: none
     omitted: none

 app-text/hunspell
    selected: 1.3.3
   protected: none
     omitted: none

 media-libs/freeglut
    selected: 2.8.1-r1
   protected: none
     omitted: none

 app-accessibility/espeak
    selected: 1.47.11-r1
   protected: none
     omitted: none

 dev-libs/dotconf
    selected: 1.3
   protected: none
     omitted: none

 dev-python/pyxdg
    selected: 0.25-r1
   protected: none
     omitted: none

 dev-python/markupsafe
    selected: 0.23
   protected: none
     omitted: none

 dev-util/re2c
    selected: 0.13.7.5
   protected: none
     omitted: none

 app-dicts/myspell-en
    selected: 20081002
   protected: none
     omitted: none

 media-libs/gst-plugins-base
    selected: 1.4.5
   protected: none
     omitted: none

 media-sound/sox
    selected: 14.4.2
   protected: none
     omitted: none

 app-text/iso-codes
    selected: 3.61
   protected: none
     omitted: none

 media-libs/gstreamer
    selected: 1.4.5
   protected: none
     omitted: none

 media-sound/gsm
    selected: 1.0.13-r1
   protected: none
     omitted: none

 dev-libs/libatomic_ops
    selected: 7.4.2
   protected: none
     omitted: none

 media-plugins/alsa-plugins
    selected: 1.0.29
   protected: none
     omitted: none

 media-sound/pulseaudio
    selected: 6.0
   protected: none
     omitted: none

 media-libs/speex
    selected: 1.2_rc1-r2
   protected: none
     omitted: none

 net-libs/libasyncns
    selected: 0.8-r3
   protected: none
     omitted: none

 net-wireless/bluez
    selected: 5.33
   protected: none
     omitted: none

 dev-libs/json-c
    selected: 0.11-r1
   protected: none
     omitted: none

 media-libs/sbc
    selected: 1.3
   protected: none
     omitted: none

 media-libs/webrtc-audio-processing
    selected: 0.1-r1
   protected: none
     omitted: none

 media-libs/libsndfile
    selected: 1.0.25-r1
   protected: none
     omitted: none

 dev-lang/orc
    selected: 0.4.24
   protected: none
     omitted: none

 dev-libs/libical
    selected: 1.0.1
   protected: none
     omitted: none

All selected packages: =dev-util/ninja-1.6.0 =dev-libs/libatomic_ops-7.4.2 =media-libs/webrtc-audio-processing-0.1-r1 =media-libs/libsndfile-1.0.25-r1 =media-sound/gsm-1.0.13-r1 =media-libs/speex-1.2_rc1-r2 =app-dicts/myspell-en-20081002 =dev-libs/re2-0_p20140304 =dev-perl/JSON-2.590.0-r1 =media-plugins/alsa-plugins-1.0.29 =dev-libs/json-c-0.11-r1 =media-plugins/gst-plugins-libav-1.4.5-r2 =dev-libs/libev-4.19 =media-libs/gst-plugins-base-1.4.5 =media-libs/libvpx-1.4.0 =dev-lang/nasm-2.11.08 =dev-python/ply-3.6-r1 =dev-libs/dotconf-1.3 =dev-python/markupsafe-0.23 =media-sound/sox-14.4.2 =media-libs/gst-plugins-good-1.4.5 =dev-python/simplejson-3.7.2 =dev-libs/libevent-2.0.22 =media-libs/freeglut-2.8.1-r1 =app-accessibility/espeak-1.47.11-r1 =media-fonts/liberation-fonts-2.00.1-r1 =dev-util/re2c-0.13.7.5 =x11-misc/gxmessage-2.20.1 =dev-lang/orc-0.4.24 =net-wireless/bluez-5.33 =media-sound/pulseaudio-6.0 =net-libs/libasyncns-0.8-r3 =media-libs/gstreamer-1.4.5 =media-libs/sbc-1.3 =dev-python/jinja-2.7.3 =media-libs/libwebp-0.4.0 =app-text/hunspell-1.3.3 =app-text/iso-codes-3.61 =app-accessibility/speech-dispatcher-0.8.1 =app-arch/snappy-1.1.2-r1 =dev-libs/libical-1.0.1 =dev-libs/jsoncpp-0.10.2-r1 =dev-python/pyxdg-0.25-r1 =x11-libs/libXinerama-1.1.3 =dev-python/beautifulsoup-3.2.1-r1

>>> 'Selected' packages are slated for removal.
>>> 'Protected' and 'omitted' packages will not be removed.

Would you like to unmerge these packages? [Yes/No]