Upgrade GCC Compiler

To Support C++11/14, you have to upgrade c++ compiler.

ubuntu 14.04

# upgrade gcc - ubuntu 14.04 
add-apt-repository ppa:ubuntu-toolchain-r/test && apt-get update
apt-get install gcc-5 g++5
ln -s /usr/bin/gcc-5 /usr/bin/gcc -f
ln -s /usr/bin/gcc-ar-5 /usr/bin/gcc-ar -f
ln -s /usr/bin/gcc-nm /usr/bin/gcc-nm -f
ln -s /usr/bin/g++-nm /usr/bin/g++-nm -f
ln -s /usr/bin/g++-ar-5 /usr/bin/g++-ar -f
ln -s /usr/bin/g++-5 /usr/bin/g++ -f

CentOS 6/7

# upgrade gcc - CentOS 6/7 
yum install centos-release-scl-rh
yum -y install devtoolset-4-gcc devtoolset-4-gcc-c++
scl enable devtoolset-4 bash
echo "source /opt/rh/devtoolset-4/enable" >> ~/.bashrc

Check Version

c++ -v