Created attachment 471702 [details] build.log After performing an upgrade, I noticed that the existing binary of nitrogen seg-faults. I tried to recompile nitrogen and it fails to compile. The build log is attached.
Created attachment 471704 [details] nitrogen emerge info
After upgrading to gcc5 you need to follow instructions from: https://www.gentoo.org/support/news-items/2015-10-22-gcc-5-new-c++11-abi.html