CentOS 6: Upgrade GCC to 5.3.1
Install CentOS SCL repo.
yum -y install centos-release-scl
Install the actual devtoolset4 (http://mirror.centos.org/centos/6/sclo/x86_64/rh/devtoolset-4/)
yum -y install devtoolset-4 devtoolset-4-libatomic-devel
Swap to gcc 5.3.1 automatically.
Put this in your ~/.bashrc
CC=/opt/rh/devtoolset-4/root/usr/bin/gcc
CPP=/opt/rh/devtoolset-4/root/usr/bin/cpp
CXX=/opt/rh/devtoolset-4/root/usr/bin/g++
PATH=/opt/rh/devtoolset-4/root/usr/bin:$PATH
Now either re-login or use “source ~/.bashrc”
Swap to gcc 5.3.1 manually.
You can manually load the variables by typing
. /opt/rh/devtoolset-4/enable