after command emerge --sync && emerge -auDN @world update is impossible because of packages conflict:

>>> Starting git pull...
remote: Counting objects: 917, done.
remote: Compressing objects: 100% (762/762), done.
remote: Total 917 (delta 641), reused 425 (delta 149), pack-reused 0
Receiving objects: 100% (917/917), 212.83 KiB | 0 bytes/s, done.
Resolving deltas: 100% (641/641), completed with 434 local objects.
From git://github.com/funtoo/ports-2012
a2a8984..43a9845 funtoo.org -> origin/funtoo.org
Updating a2a8984..43a9845
Fast-forward
>>> Git pull in /usr/portage successful

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

Calculating dependencies... done!
[ebuild N ] app-eselect/eselect-lib-bin-symlink-0.1.1
[ebuild N ] dev-python/beaker-1.6.4-r1000 USE="{-test}" PYTHON_ABIS="2.7 3.3 -2.6 -2.7-jython -2.7-pypy -3.1 -3.2 -3.2-pypy -3.4 (-3.5)"
[ebuild N ] dev-python/mock-1.0.1-r1000 USE="-doc {-test}" PYTHON_ABIS="2.7 3.3 -2.6 -2.7-jython -2.7-pypy -3.1 -3.2 -3.2-pypy -3.4 (-3.5)"
[ebuild N ] app-eselect/eselect-pinentry-0.4
[ebuild N ] virtual/python-mock-0 PYTHON_ABIS="2.7 3.3 -2.6 -2.7-jython -2.7-pypy -3.1 -3.2 -3.2-pypy -3.4 (-3.5)"
[ebuild N ] dev-python/mako-1.0.0-r1000 USE="-doc {-test}" PYTHON_ABIS="2.7 3.3 -2.6 -2.7-jython -2.7-pypy -3.1 -3.2 -3.2-pypy -3.4 (-3.5)"
[ebuild U ] dev-libs/libtasn1-4.4 [4.2]
[ebuild NS ] sys-kernel/debian-sources-3.19.3 [3.16.2] USE="binary -rt"
[ebuild U ] sys-apps/man-pages-3.81 [3.79]
[ebuild U ] net-misc/openssh-6.8_p1-r3 [6.7_p1-r4] USE="ssl%* -debug% -ssh1%"
[ebuild U ] app-admin/eselect-opengl-1.3.1-r3 [1.2.7]
[ebuild U ] x11-proto/glproto-1.4.17-r1 [1.4.17]
[blocks b ] <x11-proto/glproto-1.4.17-r1 ("<x11-proto/glproto-1.4.17-r1" is blocking app-admin/eselect-opengl-1.3.1-r3)
[ebuild U ] media-libs/mesa-10.5.2 [10.3.5] USE="-d3d9% -vaapi%"
[blocks b ] <media-libs/mesa-10.3.7-r2 ("<media-libs/mesa-10.3.7-r2" is blocking app-admin/eselect-opengl-1.3.1-r3)
[ebuild U ] x11-base/xorg-server-1.16.4-r1 [1.16.1-r4]
[blocks b ] <x11-base/xorg-server-1.16.4-r1 ("<x11-base/xorg-server-1.16.4-r1" is blocking app-admin/eselect-opengl-1.3.1-r3)
[blocks B ] <=app-emulation/emul-linux-x86-opengl-20140508 ("<=app-emulation/emul-linux-x86-opengl-20140508" is blocking app-admin/eselect-opengl-1.3.1-r3)

• Error: The above package list contains packages which cannot be
• installed at the same time on the same system.

(app-emulation/emul-linux-x86-opengl-20140508::gentoo, installed) pulled in by
app-emulation/emul-linux-x86-opengl required by (app-emulation/emul-linux-x86-xlibs-20140508::gentoo, installed)
~app-emulation/emul-linux-x86-opengl-20140508 required by (app-emulation/emul-linux-x86-qtlibs-20140508-r1::gentoo, installed)

(app-admin/eselect-opengl-1.3.1-r3::gentoo, ebuild scheduled for merge) pulled in by
>=app-admin/eselect-opengl-1.3.0 required by (x11-base/xorg-server-1.16.4-r1::gentoo, ebuild scheduled for merge)
>=app-admin/eselect-opengl-1.3.0 required by (media-libs/mesa-10.5.2::gentoo, ebuild scheduled for merge)
>=app-admin/eselect-opengl-1.3.0 required by (x11-proto/glproto-1.4.17-r1::gentoo, ebuild scheduled for merge)

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