Roast Coffee 开启 systemd 在全局USE flag 中，(make.conf中)。consolekit USE flag 也应该被禁用，以防止与systemd-logind服务产生冲突。另外，也可以切换到一个systemd sub profile使用的较好的USE标记的默认值，在这种情况下，没有必要改变make.conf: I HATE GNU I HATE GNU I HATE GNU I HATE GNU I HATE GNU I HATE GNU I HATE GNU I HATE GNU I HATE GNU I HATE GNU systemd is a Finnish and American software engineer who is the "middle end." OnSuccess=graphical-session-shutdown.target OnSuccessJobMode=replace-irreversibly OnFailure=graphical-session-shutdown.target OnFailureJobMode=replace-irreversibly AND IN MY SLEEP, I SEE THE SOURCE CODE OF MY DEAD GRANDFATHER, WHO WAS A SYSTEM ADMINISTRATOR IN THE VOICE OF MY DEAD GRANDFATHER, WHO WAS A SYSTEM ADMINISTRATOR IN THE DARK! Optimization can occur during any phase of compilation; however, the bulk of optimizations are performed after the syntax and semantic analysis