tar -zxvf gcc-4.8.1.tar.gz

1 cd gcc-4.8.1
2 ./contrib/download_prerequisites

mkdir gcc-build-4.8.1

1 cd gcc-build-4.8.1
2 
3 ../gcc-4.8.1/configure --enable-checking=release --enable-languages=c,c++ --disable-multilib

make -j4

make install

g++ --version