Use the higher version of GCC through SCL

install

dnf install centos-release-scl
dnf install devtoolset-9

usage

scl enable devtoolset-9 zsh

cmake

export CC=`which gcc`
export CXX=`which g++`

default

# /etc/profile
source /opt/rh/devtoolset-9/enable
export CC=`which gcc`
export CXX=`which g++`

vscode cmake-tools-kits:

~/.local/share/CMakeTools