Hello! Same with many rAthena users, I too have encountered the massive warnings upon compiling the latest git. So i took my time to google around and finally was able to find something that could solve this issue without using Centos7. Just follow the sequence below and you'll have your gcc updated to 4.9 in no time! First you need to login as root. yum install centos-release-scl yum install devtoolset-4-toolchain scl enable devtoolset-4 ba