here is the build logs of the several build tasks, without changing USEs, but the error varies from time to time,, Reproducible: Always
Created attachment 410058 [details] first time build
Created attachment 410060 [details] second time build log
Created attachment 410078 [details] third, virtual memory..
Created attachment 410092 [details] fourth, internal compiler error
Created attachment 410100 [details] emerge info
now, it finally got built successfully without touch any misc settings. It seems that freeorion need too many hardware resources to build,especially memory. Last time it just make my system crushed ,,,
Hi, It seems you have 6GB RAM and no swap and you are compiling with makeopts="-k4". You should compile heavy things like freeorion with makeopts="-j1", otherwise you may well run out of RAM and strange things happen, like you observed. We can't do anything about the resources necessary to build or run freeorion, sorry.