sudo emerge --sync
sudo emerge -DuNatv world
sudo emerge --depclean
renko@renko ~ $ sudo gcc-config -c
* gcc-config: Active gcc profile is invalid!
[1] x86_64-pc-linux-gnu-4.5.3
renko@renko ~ $ sudo gcc-config 1
* Switching native-compiler to x86_64-pc-linux-gnu-4.5.3 ...
* gcc-config: Active gcc profile is invalid!
* Your gcc has a bug with GCC_SPECS.
* Please re-emerge gcc.
* http://bugs.gentoo.org/68395