As per summary the package in the description fails to build with libnl-2 and libnl-3.
Created attachment 286039 [details] build.log Error log.
Upstream fix : http://cgit.freedesktop.org/NetworkManager/NetworkManager/patch/configure.ac?id=a6c65568313183c5b56b36934e07a1d675d4217b for libnl2 and http://cgit.freedesktop.org/NetworkManager/NetworkManager/patch/configure.ac?id=daeb181fa2c7bb2e6aeb44344a73b6fe448a388d for libnl3
Hum, this is the actual complete patch, sorry http://cgit.freedesktop.org/NetworkManager/NetworkManager/patch/?id=0fe8c80faef07777b9d6712abbdfbb9671b70899
It seems there is no explicit libnl-1 dependencies in NetworkManager ebuild, so after libnl-3 emerged "emerge --depclean" removes libnl-1 and NetworkManager get broken libnl dependency.
# ChangeLog for net-misc/networkmanager # Copyright 1999-2011 Gentoo Foundation; Distributed under the GPL v2 # $Header: /var/cvsroot/gentoo-x86/net-misc/networkmanager/ChangeLog,v 1.116 2011/10/27 05:50:07 tetromino Exp $ 27 Oct 2011; Alexandre Rostovtsev <tetromino@gentoo.org> networkmanager-0.8-r1.ebuild, networkmanager-0.8.4.0-r2.ebuild, networkmanager-0.9.0.ebuild: Depend on slot 1.1 of libnl.