# cat /etc/redhat-release CentOS Linux release 7.6.1810 (Core) # yum install -y devtoolset-8 # scl enable devtoolset-8 bash ... 略 # which gcc /opt/rh/devtoolset-8/root/usr/bin/gcc # gcc --version gcc (GCC) 8.3.1 20190311 (Red Hat 8.3.1-3) Copyright (C) 2018 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILIT