Re: [gentoo-user] unclear (to me) errors from portage

[Gevisz]

On Thu, 07 Aug 2014 23:33:34 -0400
gottlieb@×××.edu wrote:

> I was away for two weeks and now one of my systems cannot be updated
> due to  conflicts.  The entire (long) emerge output is at the end of
> this msg.
>
>
> ------------------  The first conflict is -------------------
>
>
> !!! Multiple package instances within a single package slot have been
> pulled !!! into the dependency graph, resulting in a slot conflict:
>
> dev-lang/perl:0
>
>   (dev-lang/perl-5.16.3::gentoo, installed) pulled in by
>     dev-lang/perl:0/5.16=[-build(-)] required by
> (net-analyzer/net-snmp-5.7.3_pre3::gentoo, installed)
>
>   (dev-lang/perl-5.18.2-r1::gentoo, ebuild scheduled for merge)
> pulled in by =dev-lang/perl-5.18* required by
> (virtual/perl-File-Spec-3.400.0-r2::gentoo, installed) (and 1 more
> with the same problem)
>
> ----------------------------------------
>
> I can't follow this.  For one thing net-snmp-5.7.3_pre3.ebuild does
> not contain the string "lang" and I looked at all occurrences of
> "perl" in the ebuild and don't see how dev-lang/perl-5.16.3 is
> required.
>
> ------------------  The second conflict is ------------
>
>  * Error: The above package list contains packages which cannot be
>  * installed at the same time on the same system.
>
>   (media-video/ffmpeg-1.2.6-r1::gentoo, ebuild scheduled for merge)
> pulled in by
>     >=media-video/ffmpeg-1.2.6-r1:0[abi_x86_32(-)?,abi_x86_64(-)?,abi_x86_x32(-)?,abi_mips_n32(-)?,abi_mips_n64(-)?,abi_mips_o32(-)?,abi_ppc_32(-)?,abi_ppc_64(-)?,abi_s390_32(-)?,abi_s390_64(-)?]
>     >(>=media-video/ffmpeg-1.2.6-r1:0[abi_x86_64(-)]) required by
>     >(media-plugins/gst-plugins-ffmpeg-0.10.13_p201211-r2::gentoo,
>     >ebuild scheduled for merge)
>
>   (media-video/libav-9.14::gentoo, installed) pulled in by
>     >=media-video/libav-9.12[abi_x86_32(-)?,abi_x86_64(-)?,abi_x86_x32(-)?,abi_mips_n32(-)?,abi_mips_n64(-)?,abi_mips_o32(-)?,abi_ppc_32(-)?,abi_ppc_64(-)?,abi_s390_32(-)?,abi_s390_64(-)?,X?,encode?,gsm?,jpeg2k?,mp3?,opus?,sdl?,speex?,theora?,threads?,truetype?,vaapi?,vdpau?,x264?]
>     >(>=media-video/libav-9.12[abi_x86_64(-),X,encode,mp3,sdl,truetype,x264])
>     >required by (virtual/ffmpeg-9-r1::gentoo, installed)
>
> ---------------------------------------------------
>
> I don't understand this since it looks to me that virtual/ffmpeg-9-r1
> wants EITHER media-video/ffmpeg OR media-video/libav.  So if
> gst-plugins-ffmpeg requires ffmpeg, why isn't virtual/ffmpeg
> satisfied, i.e., why does it require that media-video/libav remain
> installed?
>
> -------------- The entire emerge command and output follows
> Note that I have
> EMERGE_DEFAULT_OPTS="--ask --deep --tree --verbose --jobs
> --load-average=5"
>
> e6510 ~ # emerge --update --changed-use --deep  @world
>
> These are the packages that would be merged, in reverse order:
>
> Calculating dependencies... done!
> [nomerge       ] gnome-base/gnome-3.12.0:2.0  USE="bluetooth cdr
> classic cups extras -accessibility" [nomerge       ]
> gnome-base/gnome-extra-apps-3.12.0:3.0  USE="games shotwell
> tracker" [ebuild     U  ]   media-video/cheese-3.12.2-r1:0/7
> [3.12.2:0/7] USE="introspection {-test}" 0 kB [nomerge       ]
> app-office/libreoffice-bin-4.2.5.2  USE="gnome (-aqua) -java -kde"
> PYTHON_SINGLE_TARGET="python2_7 -python3_3 (-python3_4)"
> PYTHON_TARGETS="python2_7 python3_3 (-python3_4)" [ebuild   R    ]
> dev-libs/redland-1.0.16  USE="berkdb xml -iodbc -mysql -odbc
> -postgres -sqlite -static-libs (-ssl%*)" 1,587 kB [ebuild     U  ]
> app-admin/syslog-ng-3.4.8 [3.4.7] USE="ipv6 pcre ssl systemd tcpd
> -amqp% -caps -dbi -geoip -json -mongodb -pacct% -smtp -spoof-source"
> 3,096 kB [ebuild     UD ] www-client/firefox-24.7.0 [30.0] USE="alsa
> dbus gstreamer jit libnotify minimal pulseaudio startup-notification
> -bindist -custom-cflags -custom-optimization -debug (-pgo) (-selinux)
> -system-cairo -system-icu -system-jpeg -system-sqlite {-test} -wifi
> (-hardened%)" LINGUAS="-af -ak% -ar -as -ast -be -bg -bn_BD -bn_IN
> -br -bs -ca -cs -csb -cy -da -de -el -en_GB -en_ZA -eo -es_AR -es_CL
> -es_ES -es_MX -et -eu -fa -fi -fr -fy_NL -ga_IE -gd -gl -gu_IN -he
> -hi_IN -hr -hu -hy_AM -id -is -it -ja -kk -km -kn -ko -ku -lg% -lt
> -lv -mai -mk -ml -mr -nb_NO -nl -nn_NO -nso% -or -pa_IN -pl -pt_BR
> -pt_PT -rm -ro -ru -si -sk -sl -son -sq -sr -sv_SE -ta -ta_LK% -te
> -th -tr -uk -vi -zh_CN -zh_TW -zu (-xh%)" 117,162 kB [ebuild     U  ]
> www-servers/apache-2.2.27-r4:2 [2.2.27:2] USE="ldap ssl -debug -doc
> (-selinux) -static -suexec -threads" APACHE2_MODULES="actions alias
> auth_basic auth_digest authn_alias authn_anon authn_dbm authn_default
> authn_file authz_dbm authz_default authz_groupfile authz_host
> authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock
> deflate dir disk_cache env expires ext_filter file_cache filter
> headers include info log_config logio mem_cache mime mime_magic
> negotiation rewrite setenvif speling status unique_id userdir
> usertrack vhost_alias -asis -authn_dbd -cern_meta -charset_lite -dbd
> -dumpio -ident -imagemap -log_forensic -proxy -proxy_ajp
> -proxy_balancer -proxy_connect -proxy_ftp -proxy_http -proxy_scgi
> -reqtimeout -substitute -version" APACHE2_MPMS="-event -itk -peruser
> -prefork -worker" 68 kB [ebuild     U  ] sys-apps/man-pages-3.69
> [3.67] USE="nls" LINGUAS="-da -de -fr -it -ja -nl -pl -ro -ru -zh_CN"
> 1,237 kB [nomerge       ] gnome-base/gnome-extra-apps-3.12.0:3.0
> USE="games shotwell tracker" [ebuild   R    ]
> app-misc/tracker-1.0.2:0/100  USE="exif flac gif gstreamer gtk iso
> jpeg miner-fs mp3 nautilus pdf tiff upower%* vorbis xml -cue (-eds)
> -ffmpeg -firefox-bookmarks -gsf -iptc -networkmanager -playlist -rss
> {-test} -thunderbird -upnp-av -xmp -xps (-laptop%)" 0 kB
> [nomerge       ] www-client/firefox-24.7.0 [30.0] USE="alsa dbus
> gstreamer jit libnotify minimal pulseaudio startup-notification
> -bindist -custom-cflags -custom-optimization -debug (-pgo) (-selinux)
> -system-cairo -system-icu -system-jpeg -system-sqlite {-test} -wifi
> (-hardened%)" LINGUAS="-af -ak% -ar -as -ast -be -bg -bn_BD -bn_IN
> -br -bs -ca -cs -csb -cy -da -de -el -en_GB -en_ZA -eo -es_AR -es_CL
> -es_ES -es_MX -et -eu -fa -fi -fr -fy_NL -ga_IE -gd -gl -gu_IN -he
> -hi_IN -hr -hu -hy_AM -id -is -it -ja -kk -km -kn -ko -ku -lg% -lt
> -lv -mai -mk -ml -mr -nb_NO -nl -nn_NO -nso% -or -pa_IN -pl -pt_BR
> -pt_PT -rm -ro -ru -si -sk -sl -son -sq -sr -sv_SE -ta -ta_LK% -te
> -th -tr -uk -vi -zh_CN -zh_TW -zu (-xh%)" [ebuild  NS    ]
> media-plugins/gst-plugins-meta-0.10-r9:0.10 [1.0-r2:1.0] USE="X a52
> aac alsa cdda dts dvd ffmpeg flac mp3 mpeg ogg pulseaudio vorbis x264
> xv xvid -dv -dvb -http -jack -lame -libass -libvisual -mms -musepack
> -opus -oss -taglib -theora -v4l -vcd -vpx -wavpack" ABI_X86="(64)
> (-32) (-x32)" 0 kB [ebuild  N     ]
> media-plugins/gst-plugins-ffmpeg-0.10.13_p201211-r2:0.10  USE="orc"
> ABI_X86="(64) (-32) (-x32)" 4,199 kB [ebuild  N     ]
> media-video/ffmpeg-1.2.6-r1  USE="X aac alsa bzip2 encode
> hardcoded-tables iconv mmx mp3 network pulseaudio sdl truetype vorbis
> x264 xvid zlib -3dnow -3dnowext -aacplus (-altivec) -amr -avx
> -bindist -bluray -cdio (-celt) -cpudetection -debug -doc -examples
> -faac -fdk -flite -fontconfig -frei0r -gnutls -gsm -iec61883
> -ieee1394 -jack -jpeg2k -libass -libcaca -libsoxr -libv4l -mmxext
> -modplug (-neon) -openal -openssl -opus -oss -pic -rtmp -schroedinger
> -speex -ssse3 -static-libs {-test} -theora -threads -twolame -v4l
> -vaapi -vdpau (-vis) -vpx" ABI_X86="(64) (-32) (-x32)"
> FFTOOLS="aviocat cws2fws ffescape ffeval fourcc2pixfmt graph2dot
> ismindex pktdumper qt-faststart trasher" 0 kB [ebuild  NS    ]
> media-plugins/gst-plugins-mpeg2dec-0.10.19-r1:0.10 [1.2.4-r1:1.0]
> ABI_X86="(64) (-32) (-x32)" 862 kB [ebuild  NS    ]
> media-plugins/gst-plugins-pulse-0.10.31-r1:0.10 [1.2.4-r1:1.0]
> ABI_X86="(64) (-32) (-x32)" 2,674 kB [nomerge       ]
> games-strategy/wesnoth-1.10.7  USE="dbus nls -dedicated -doc
> -server" [nomerge       ]  media-libs/sdl-net-1.2.8
> USE="-static-libs" [ebuild     U ~]   media-libs/libsdl-1.2.15-r8
> [1.2.15-r7] USE="X alsa joystick opengl pulseaudio sound video xv
> -aalib -custom-cflags -dga -fbcon -libcaca -nas -oss -static-libs
> -tslib -xinerama" ABI_X86="(64) -32 (-x32)" 3,829 kB [nomerge       ]
> gnome-extra/gnome-shell-extensions-3.12.2
> USE="-examples" [nomerge       ]  gnome-base/gnome-shell-3.12.2
> USE="bluetooth i18n networkmanager (-openrc-force)"
> PYTHON_TARGETS="python2_7" [nomerge       ]
> gnome-base/gnome-control-center-3.12.1-r1:2  USE="bluetooth colord
> cups gnome-online-accounts i18n -debug -kerberos -v4l"
> INPUT_DEVICES="-wacom" [ebuild     U  ]
> x11-misc/colord-1.2.1-r1:0/2 [1.2.1:0/2] USE="gusb introspection
> policykit systemd udev -examples -extra-print-profiles -scanner
> -vala" 0 kB [ebuild     U  ]     virtual/libudev-215-r1:0/1 [208:0/1]
> USE="systemd%* (-static-libs)" ABI_X86="(64) (-32) (-x32)" 0 kB
> [ebuild     U  ]     virtual/libgudev-215-r1 [208] USE="introspection
> systemd%* (-static-libs)" ABI_X86="(64) (-32) (-x32)" 0 kB
> [ebuild     U  ]      sys-apps/systemd-215-r3:0/2 [212-r5:0/2]
> USE="acl filecaps firmware-loader gudev introspection kmod pam
> policykit seccomp -audit -cryptsetup -doc -elfutils% -gcrypt -http
> (-kdbus) -lzma -python -qrcode (-selinux) (-ssl) {-test} -vanilla
> (-xattr%)" ABI_X86="(64) (-32) (-x32)"
> PYTHON_SINGLE_TARGET="python2_7 -python3_2 -python3_3 (-python3_4)"
> PYTHON_TARGETS="python2_7 python3_3 -python3_2 (-python3_4)" 2,821 kB
> [ebuild     U  ] net-misc/dhcpcd-6.4.3 [6.2.0-r1] USE="ipv6 udev" 147
> kB [nomerge       ] www-servers/apache-2.2.27-r4:2 [2.2.27:2]
> USE="ldap ssl -debug -doc (-selinux) -static -suexec -threads"
> APACHE2_MODULES="actions alias auth_basic auth_digest authn_alias
> authn_anon authn_dbm authn_default authn_file authz_dbm authz_default
> authz_groupfile authz_host authz_owner authz_user autoindex cache cgi
> cgid dav dav_fs dav_lock deflate dir disk_cache env expires
> ext_filter file_cache filter headers include info log_config logio
> mem_cache mime mime_magic negotiation rewrite setenvif speling status
> unique_id userdir usertrack vhost_alias -asis -authn_dbd -cern_meta
> -charset_lite -dbd -dumpio -ident -imagemap -log_forensic -proxy
> -proxy_ajp -proxy_balancer -proxy_connect -proxy_ftp -proxy_http
> -proxy_scgi -reqtimeout -substitute -version" APACHE2_MPMS="-event
> -itk -peruser -prefork -worker" [ebuild     U  ]
> dev-libs/apr-util-1.5.3-r2:1 [1.5.3-r1:1] USE="berkdb gdbm ldap -doc
> -freetds -mysql -nss -odbc -openssl -postgres -sqlite -static-libs"
> 680 kB [nomerge       ] net-print/hplip-3.14.1  USE="X fax hpcups
> libnotify policykit qt4 scanner snmp -doc -hpijs -kde -libusb0
> -minimal -parport -static-ppds" PYTHON_SINGLE_TARGET="python2_7
> (-python2_6)" PYTHON_TARGETS="python2_7 (-python2_6)" [ebuild     U
> ]  virtual/udev-215 [208-r2] USE="systemd%* (-gudev%*)
> (-introspection%*) (-static-libs%)" ABI_X86="(-32%) (-64%*) (-x32%)"
> 0 kB [nomerge       ] gnome-base/gnome-extra-apps-3.12.0:3.0
> USE="games shotwell tracker" [nomerge       ]
> net-analyzer/gnome-nettool-3.8.1  USE="-debug" [nomerge       ]
> net-analyzer/nmap-6.25  USE="gtk ipv6 lua nls ssl -ncat -ndiff
> -nmap-update -nping" LINGUAS="-de -es -fr -hr -hu -id -it -ja -pl
> -pt_BR -pt_PT -ro -ru -sk -zh" [ebuild   R    ]
> net-libs/libpcap-1.5.3  USE="dbus ipv6 -bluetooth* -canusb -netlink
> -static-libs" 628 kB [ebuild  NS    ]
> sys-kernel/gentoo-sources-3.14.14:3.14.14 [3.10.32:3.10.32,
> 3.11.1:3.11.1, 3.12.13:3.12.13, 3.12.20:3.12.20,
> 3.12.21-r1:3.12.21-r1] USE="-build -deblob -experimental -symlink"
> 76,945 kB [nomerge       ] sys-apps/logwatch-7.4.0_p170-r1
> [nomerge       ]  dev-perl/DateManip-6.410.0
> USE="{-test}" [nomerge       ]   virtual/perl-Storable-2.450.0
> [ebuild     U ~]    perl-core/Storable-2.450.0-r1 [2.450.0] 180 kB
> [nomerge       ] app-text/texlive-2013  USE="X png truetype xml -cjk
> -context -detex -dvi2tty -dvipdfm -epspdf -extra -games -graphics
> -humanities -jadetex -luatex -metapost -music -omega
> -pdfannotextractor -pstricks -publishers -science -tex4ht -texi2html
> -xetex -xindy" LINGUAS="en -af -ar -as -bg -bn -br -ca -cs -cy -da
> -de -el -en_GB -eo -es -et -eu -fa -fi -fr -ga -gl -gu -he -hi -hr
> -hsb -hu -hy -ia -id -is -it -ja -kn -ko -la -lo -lt -lv -ml -mn -mr
> -nb -nl -nn -no -or -pa -pl -pt -rm -ro -ru -sa_IN -sco -sk -sl -sq
> -sr -sv -ta -te -th -tk -tr -uk -vi -zh" [nomerge       ]
> dev-texlive/texlive-genericrecommended-2013  USE="-doc
> -source" [nomerge       ]   app-text/texlive-core-2013-r1  USE="X
> -cjk -doc -source -tk -xetex" [nomerge       ]
> virtual/perl-Getopt-Long-2.420.0-r1 [nomerge       ]
> perl-core/Getopt-Long-2.420.0 [ebuild     U  ]
> virtual/perl-Pod-Parser-1.600.0 [1.510.0-r2] 0 kB [nomerge       ]
> app-office/libreoffice-bin-4.2.5.2  USE="gnome (-aqua) -java -kde"
> PYTHON_SINGLE_TARGET="python2_7 -python3_3 (-python3_4)"
> PYTHON_TARGETS="python2_7 python3_3 (-python3_4)" [ebuild     U  ]
> dev-libs/boost-1.52.0-r7:0/1.52 [1.52.0-r6:0/1.52] USE="nls threads
> -debug -doc -icu -mpi -python -static-libs -tools"
> PYTHON_TARGETS="python2_7 python3_3 -python3_2" 53,147 kB
> [nomerge       ] net-print/hplip-3.14.1  USE="X fax hpcups libnotify
> policykit qt4 scanner snmp -doc -hpijs -kde -libusb0 -minimal
> -parport -static-ppds" PYTHON_SINGLE_TARGET="python2_7 (-python2_6)"
> PYTHON_TARGETS="python2_7 (-python2_6)" [nomerge       ]
> net-analyzer/net-snmp-5.7.3_pre3  USE="X bzip2 ipv6 ssl tcpd zlib
> -doc -elf -lm_sensors -mfd-rewrites -minimal -mysql -netlink -pci
> -perl -python -rpm (-selinux) -ucd-compat"
> PYTHON_SINGLE_TARGET="python2_7 (-python2_6)"
> PYTHON_TARGETS="python2_7 (-python2_6)" [nomerge       ]
> dev-lang/perl-5.16.3:0/5.16  USE="berkdb gdbm -debug -doc
> -ithreads" [ebuild     U  ]    app-admin/perl-cleaner-2.16 [2.15] 6
> kB [nomerge       ] media-plugins/gst-plugins-meta-0.10-r9:0.10
> [1.0-r2:1.0] USE="X a52 aac alsa cdda dts dvd ffmpeg flac mp3 mpeg
> ogg pulseaudio vorbis x264 xv xvid -dv -dvb -http -jack -lame -libass
> -libvisual -mms -musepack -opus -oss -taglib -theora -v4l -vcd -vpx
> -wavpack" ABI_X86="(64) (-32) (-x32)" [ebuild  NS    ]
> media-plugins/gst-plugins-cdparanoia-0.10.36-r1:0.10 [1.2.4-r1:1.0]
> ABI_X86="(64) (-32) (-x32)" 2,309 kB [nomerge       ]
> gnome-base/gnome-extra-apps-3.12.0:3.0  USE="games shotwell
> tracker" [nomerge       ]  gnome-extra/gnome-documents-3.12.1
> [nomerge       ]   app-misc/tracker-1.0.2:0/100  USE="exif flac gif
> gstreamer gtk iso jpeg miner-fs mp3 nautilus pdf tiff upower%* vorbis
> xml -cue (-eds) -ffmpeg -firefox-bookmarks -gsf -iptc -networkmanager
> -playlist -rss {-test} -thunderbird -upnp-av -xmp -xps
> (-laptop%)" [ebuild     U  ]    app-i18n/enca-1.14-r2 [1.14-r1]
> USE="recode -doc" ABI_X86="(64) -32 (-x32)" 548 kB [nomerge       ]
> media-plugins/gst-plugins-meta-0.10-r9:0.10 [1.0-r2:1.0] USE="X a52
> aac alsa cdda dts dvd ffmpeg flac mp3 mpeg ogg pulseaudio vorbis x264
> xv xvid -dv -dvb -http -jack -lame -libass -libvisual -mms -musepack
> -opus -oss -taglib -theora -v4l -vcd -vpx -wavpack" ABI_X86="(64)
> (-32) (-x32)" [ebuild  NS    ]
> media-plugins/gst-plugins-flac-0.10.31-r1:0.10 [1.2.4-r1:1.0]
> ABI_X86="(64) (-32) (-x32)" 0 kB [ebuild  N     ]
> media-plugins/gst-plugins-vorbis-0.10.36-r1:0.10  ABI_X86="(64) (-32)
> (-x32)" 0 kB [ebuild  NS    ]
> media-plugins/gst-plugins-a52dec-0.10.19-r1:0.10 [1.2.4-r1:1.0]
> USE="orc" ABI_X86="(64) (-32) (-x32)" 0 kB [ebuild  N     ]
> media-plugins/gst-plugins-ogg-0.10.36-r1:0.10  ABI_X86="(64) (-32)
> (-x32)" 0 kB [ebuild  NS    ]
> media-plugins/gst-plugins-faad-0.10.23-r1:0.10 [1.2.4-r1:1.0]
> ABI_X86="(64) (-32) (-x32)" 3,082 kB [ebuild  N     ]
> media-plugins/gst-plugins-alsa-0.10.36-r1:0.10  ABI_X86="(64) (-32)
> (-x32)" 0 kB [ebuild  N     ]
> media-plugins/gst-plugins-xvideo-0.10.36-r1:0.10  ABI_X86="(64) (-32)
> (-x32)" 0 kB [ebuild  NS    ]
> media-plugins/gst-plugins-dts-0.10.23-r1:0.10 [1.2.4-r1:1.0]
> USE="orc" ABI_X86="(64) (-32) (-x32)" 0 kB [ebuild  NS    ]
> media-plugins/gst-plugins-dvdread-0.10.19-r1:0.10 [1.2.4-r1:1.0]
> ABI_X86="(64) (-32) (-x32)" 0 kB [ebuild  N     ]
> media-plugins/gst-plugins-xvid-0.10.23-r1:0.10  ABI_X86="(64) (-32)
> (-x32)" 0 kB [ebuild  N     ]
> media-plugins/gst-plugins-x-0.10.36-r1:0.10  ABI_X86="(64) (-32)
> (-x32)" 0 kB [ebuild  NS    ]
> media-plugins/gst-plugins-x264-0.10.19-r1:0.10 [1.2.4-r1:1.0]
> ABI_X86="(64) (-32) (-x32)" 0 kB [ebuild  NS    ]
> media-plugins/gst-plugins-mad-0.10.19-r1:0.10 [1.2.4-r1:1.0]
> ABI_X86="(64) (-32) (-x32)" 0 kB [ebuild  NS    ]
> media-plugins/gst-plugins-resindvd-0.10.23-r1:0.10 [1.2.4-r1:1.0]
> ABI_X86="(64) (-32) (-x32)" 0 kB [ebuild  NS    ]
> media-libs/gst-plugins-good-0.10.31-r1:0.10 [1.2.4-r1:1.0] USE="nls
> orc" ABI_X86="(64) (-32) (-x32)" 0 kB [nomerge       ]
> media-plugins/gst-plugins-faad-0.10.23-r1:0.10 [1.2.4-r1:1.0]
> ABI_X86="(64) (-32) (-x32)" [ebuild  NS    ]
> media-libs/gst-plugins-bad-0.10.23-r2:0.10 [1.2.4-r1:1.0] USE="nls
> orc" ABI_X86="(64) (-32) (-x32)" 6 kB [nomerge       ]
> media-plugins/gst-plugins-dvdread-0.10.19-r1:0.10 [1.2.4-r1:1.0]
> ABI_X86="(64) (-32) (-x32)" [ebuild  NS    ]
> media-libs/gst-plugins-ugly-0.10.19-r1:0.10 [1.2.4-r1:1.0] USE="nls
> orc" ABI_X86="(64) (-32) (-x32)" 0 kB [ebuild  NS    ]
> media-libs/gst-plugins-base-0.10.36-r1:0.10 [1.2.4-r1:1.0]
> USE="introspection nls orc" ABI_X86="(64) (-32) (-x32)" 0 kB
> [nomerge       ] gnome-extra/gnome-shell-extensions-3.12.2
> USE="-examples" [nomerge       ]
> app-admin/eselect-gnome-shell-extensions-20120911 [nomerge       ]
> gnome-base/gnome-shell-3.12.2  USE="bluetooth i18n networkmanager
> (-openrc-force)" PYTHON_TARGETS="python2_7" [nomerge       ]
> app-accessibility/caribou-0.4.13  PYTHON_TARGETS="python2_7
> (-python2_6)" [nomerge       ]     dev-python/pyatspi-2.12.0
> PYTHON_TARGETS="python2_7 python3_3 -python3_2" [nomerge       ]
> dev-python/pygobject-3.12.2:3  USE="cairo threads -examples {-test}"
> PYTHON_TARGETS="python2_7 python3_3 -python3_2
> (-python3_4)" [nomerge       ]       dev-python/pycairo-1.10.0-r4
> USE="svg xcb -doc -examples {-test}" PYTHON_TARGETS="python2_7
> python3_3 (-python2_6) -python3_2" [ebuild     U  ]
> dev-lang/python-3.3.5-r1:3.3 [3.3.3:3.3] USE="gdbm ipv6 ncurses
> readline sqlite ssl threads xml -build -doc -examples -hardened -tk
> -wininst" 11,845 kB [nomerge       ] gnome-base/gnome-3.12.0:2.0
> USE="bluetooth cdr classic cups extras -accessibility" [nomerge
> ]  gnome-base/gnome-core-apps-3.12.0:3.0  USE="bluetooth cdr
> cups" [nomerge       ]   gnome-base/gnome-control-center-3.12.1-r1:2
> USE="bluetooth colord cups gnome-online-accounts i18n -debug
> -kerberos -v4l" INPUT_DEVICES="-wacom" [nomerge       ]
> net-fs/samba-3.6.23-r1  USE="acl aio client cups fam ldap netapi pam
> readline server smbclient winbind -addns -ads -avahi -caps -cluster
> -debug -dmapi -doc -examples -ldb -quota (-selinux) -smbsharemodes
> -swat -syslog" ABI_X86="(64) (-32) (-x32)" [nomerge       ]
> net-fs/cifs-utils-6.1-r1  USE="acl ads caps caps-ng
> -creds" [nomerge       ]      virtual/krb5-0-r1  ABI_X86="(64) (-32)
> (-x32)" [ebuild     U  ]       app-crypt/mit-krb5-1.12.1-r2
> [1.12.1-r1] USE="keyutils pkinit threads -doc -openldap (-selinux)
> {-test} -xinetd" ABI_X86="(64) (-32) (-x32)" 11,670 kB [nomerge
> ] gnome-extra/gnome-documents-3.12.1 [nomerge       ]
> net-misc/gnome-online-miners-3.12.0 [nomerge       ]
> net-libs/libgfbgraph-0.2.2:0.2  USE="introspection" [ebuild     U
> ]    dev-libs/gobject-introspection-1.40.0-r1 [1.40.0] USE="cairo
> -doctool {-test}" PYTHON_SINGLE_TARGET="python2_7"
> PYTHON_TARGETS="python2_7" 0 kB [ebuild     U  ]
> dev-lang/python-2.7.7:2.7 [2.7.6-r1:2.7] USE="gdbm ipv6 ncurses
> readline sqlite ssl threads (wide-unicode) xml -berkdb -build -doc
> -examples -hardened -tk -wininst" 10,264 kB [nomerge       ]
> app-office/libreoffice-bin-4.2.5.2  USE="gnome (-aqua) -java -kde"
> PYTHON_SINGLE_TARGET="python2_7 -python3_3 (-python3_4)"
> PYTHON_TARGETS="python2_7 python3_3 (-python3_4)" [nomerge       ]
> net-misc/curl-7.36.0  USE="ipv6 ldap ssl -adns -idn -kerberos
> -metalink -rtmp -ssh -static-libs {-test} -threads" CURL_SSL="nss
> -axtls -gnutls -openssl -polarssl" [ebuild     U  ]
> dev-libs/nss-3.16.3 [3.16] USE="cacert nss-pem -utils"
> ABI_X86="(64%*) (-32) (-x32)" 6,329 kB [nomerge       ]
> gnome-base/gnome-extra-apps-3.12.0:3.0  USE="games shotwell
> tracker" [nomerge       ]  media-gfx/gnome-screenshot-3.12.0
> [nomerge       ]   x11-libs/gtk+-3.12.2:3  USE="X colord cups
> introspection (-aqua) -cloudprint -debug -examples {-test}
> -vim-syntax -wayland -xinerama" [nomerge       ]
> x11-misc/colord-1.2.1-r1:0/2 [1.2.1:0/2] USE="gusb introspection
> policykit systemd udev -examples -extra-print-profiles -scanner
> -vala" [nomerge       ]     dev-util/intltool-0.50.2-r1 [ebuild
> U  ]      dev-perl/XML-Parser-2.410.0-r2 [2.410.0-r1] 233 kB
> [nomerge       ] app-office/libreoffice-bin-4.2.5.2  USE="gnome
> (-aqua) -java -kde" PYTHON_SINGLE_TARGET="python2_7 -python3_3
> (-python3_4)" PYTHON_TARGETS="python2_7 python3_3
> (-python3_4)" [ebuild     U  ]  dev-libs/nspr-4.10.6-r1 [4.10.6]
> USE="-debug" ABI_X86="(64%*) (-32) (-x32)" 0 kB [ebuild     U  ]
> dev-lang/perl-5.18.2-r1:0/5.18 [5.16.3:0/5.16] USE="berkdb gdbm
> -debug -doc -ithreads" 13,746 kB [nomerge       ]
> net-print/hplip-3.14.1  USE="X fax hpcups libnotify policykit qt4
> scanner snmp -doc -hpijs -kde -libusb0 -minimal -parport
> -static-ppds" PYTHON_SINGLE_TARGET="python2_7 (-python2_6)"
> PYTHON_TARGETS="python2_7 (-python2_6)" [nomerge       ]
> dev-python/notify-python-0.1.1-r3  USE="-examples"
> PYTHON_TARGETS="python2_7 (-python2_6)" [nomerge       ]
> x11-libs/libnotify-0.7.6  USE="introspection {-test}" [nomerge
> ]    virtual/notification-daemon-0  USE="gnome" [nomerge       ]
> gnome-base/gnome-shell-3.12.2  USE="bluetooth i18n networkmanager
> (-openrc-force)" PYTHON_TARGETS="python2_7" [ebuild     U  ]
> sys-libs/timezone-data-2014d [2014a] USE="nls" 389 kB [ebuild     U
> ] sys-devel/gnuconfig-20140212 [20131128] 44 kB [nomerge       ]
> app-office/libreoffice-bin-4.2.5.2  USE="gnome (-aqua) -java -kde"
> PYTHON_SINGLE_TARGET="python2_7 -python3_3 (-python3_4)"
> PYTHON_TARGETS="python2_7 python3_3 (-python3_4)" [ebuild     U  ]
> sys-libs/glibc-2.19-r1:2.2 [2.17:2.2] USE="(multilib) -debug -gd
> (-hardened) -nscd -profile (-selinux) -suid -systemtap -vanilla"
> 19,751 kB [blocks B      ] media-video/ffmpeg:0
> ("media-video/ffmpeg:0" is blocking media-video/libav-9.14)
>
> Total: 57 packages (28 upgrades, 1 downgrade, 8 new, 17 in new slots,
> 3 reinstalls), Size of downloads: 349,473 kB Conflict: 1 block (1
> unsatisfied)
>
> !!! Multiple package instances within a single package slot have been
> pulled !!! into the dependency graph, resulting in a slot conflict:
>
> dev-lang/perl:0
>
>   (dev-lang/perl-5.16.3::gentoo, installed) pulled in by
>     dev-lang/perl:0/5.16=[-build(-)] required by
> (net-analyzer/net-snmp-5.7.3_pre3::gentoo, installed)
>
>   (dev-lang/perl-5.18.2-r1::gentoo, ebuild scheduled for merge)
> pulled in by =dev-lang/perl-5.18* required by
> (virtual/perl-File-Spec-3.400.0-r2::gentoo, installed) (and 1 more
> with the same problem)
>
>
> It may be possible to solve this problem by using package.mask to
> prevent one of those packages from being selected. However, it is also
> possible that conflicting dependencies exist such that they are
> impossible to satisfy simultaneously.  If such a conflict exists in
> the dependencies of two different packages, then those packages can
> not be installed simultaneously. You may want to try a larger value of
> the --backtrack option, such as --backtrack=30, in order to see if
> that will solve this conflict automatically.

Have you tried this, last, suggestion? That is, have you tried to add
--backtrack=60 option to your usual update world command? For example,

emerge --update --deep --with-bdeps=y --newuse --backtrack=60 --ask world 

> For more information, see MASKED PACKAGES section in the emerge man
> page or refer to the Gentoo Handbook.
>
>
>  * Error: The above package list contains packages which cannot be
>  * installed at the same time on the same system.
>
>   (media-video/ffmpeg-1.2.6-r1::gentoo, ebuild scheduled for merge)
> pulled in by
>     >=media-video/ffmpeg-1.2.6-r1:0[abi_x86_32(-)?,abi_x86_64(-)?,abi_x86_x32(-)?,abi_mips_n32(-)?,abi_mips_n64(-)?,abi_mips_o32(-)?,abi_ppc_32(-)?,abi_ppc_64(-)?,abi_s390_32(-)?,abi_s390_64(-)?]
>     >(>=media-video/ffmpeg-1.2.6-r1:0[abi_x86_64(-)]) required by
>     >(media-plugins/gst-plugins-ffmpeg-0.10.13_p201211-r2::gentoo,
>     >ebuild scheduled for merge)
>
>   (media-video/libav-9.14::gentoo, installed) pulled in by
>     >=media-video/libav-9.12[abi_x86_32(-)?,abi_x86_64(-)?,abi_x86_x32(-)?,abi_mips_n32(-)?,abi_mips_n64(-)?,abi_mips_o32(-)?,abi_ppc_32(-)?,abi_ppc_64(-)?,abi_s390_32(-)?,abi_s390_64(-)?,X?,encode?,gsm?,jpeg2k?,mp3?,opus?,sdl?,speex?,theora?,threads?,truetype?,vaapi?,vdpau?,x264?]
>     >(>=media-video/libav-9.12[abi_x86_64(-),X,encode,mp3,sdl,truetype,x264])
>     >required by (virtual/ffmpeg-9-r1::gentoo, installed)
>
>
> For more information about Blocked Packages, please refer to the
> following section of the Gentoo Linux x86 Handbook (architecture is
> irrelevant):
>
> http://www.gentoo.org/doc/en/handbook/handbook-x86.xml?full=1#blocked
>
> e6510 ~ #
>
>