C++11出来好久了，现在还是使用c++03的，需要在centos6.6的系统上实现gcc的升级，又不想自己编译代码。
于是选用了devtoolsset系列，安装脚本如下
安装脚本如下
function devtools_v3() {
sudo yum install devtoolset-3-gcc devtoolset-3-gcc-c++ devtoolset-3-gdb
}
function get_devtools_v4() {
url="http://mirror.centos.org/centos/6/sclo/x86_64/rh/devtoolset-4/"
package="devtoolset-4-libstdc++-devel-5.3.1-6.1.el6.x86_64.rpm devtoolset-4-runtime-4.1-3.el6.x86_64.rpm devtoolset-4-binutils-2.25-10.el6.x86_64.rpm devtoolset-4-binutils-2.25.1-8.el6.x86_64.rpm devtoolset-4-gcc-5.3.1-6.1.el6.x86_64.rpm devtoolset-4-gcc-c++-5.3.1-6.1.el6.x86_64.rpm devtoolset-4-gcc-gdb-plugin-5.3.1-6.1.el6.x86_64.rpm devtoolset-4-gdb-7.11-67.el6.x86_64.rpm devtoolset-4-gdb-gdbserver-7.10-20.el6.x86_64.rpm"
for file in ${package[@]}
do
url_file=${url}$file
wget $url_file
#sudo rpp -vhi $file
done
}
get_devtools_v4
然后设置下环境变量即可，不修改系统的gcc
GCCPath=/opt/rh/devtoolset-4/root/usr
export CC=$GCCPath/bin/gcc
export CXX=$GCCPath/bin/g++
export CPP=$GCCPath/bin/cpp
export LD=$GCCPath/bin/g++
export LIBRARY_PATH=$GCCPath/lib64:$LIBRARY_PATH
export LD_LIBRARY_PATH=$GCCPath/lib64:$LD_LIBRARY_PATH