[Update @world failed]

I solve my problem.

[Update @world failed]

after emerge -DNu world --with-bdeps=y

sidro-home ~ # etc-update
Scanning Configuration files...
Exiting: Nothing left to do; exiting. :)
sidro-home ~ # emerge -DNu world --with-bdeps=y
Calculating dependencies... done!

emerge: there are no ebuilds built with USE flags to satisfy ">=dev-qt/qtcore-4.8.5:4[qt3support,ssl]".
!!! One of the following packages is required to complete your request:
- dev-qt/qtcore-4.8.5-r2::gentoo (Change USE: +qt3support)
(dependency required by "sys-auth/polkit-kde-agent-0.99.0-r1" [installed])
(dependency required by "sys-auth/polkit-0.112-r1[kde]" [ebuild])
(dependency required by "sys-auth/consolekit-0.4.6[policykit]" [ebuild])
(dependency required by "x11-apps/xdm-1.1.11-r3[consolekit]" [installed])
(dependency required by "@selected" [set])
(dependency required by "@world" [argument])

[Update @world failed]

sudo emerge -uDN @world

If I want to update my sistem I get errors.

 

https://pastee.org/cwdhx

 

What to do?