wget http://ftp.mirrorservice.org/sites/sourceware.org/pub/gcc/releases/gcc-9.1.0/gcc-9.1.0.tar.gz
tar zxvf gcc-9.1.0.tar.gz
cd gcc-9.1.0
./contrib/download_prerequisites
./configure --disable-multilib --enable-languages=c,c++
make -j 4
make install
export PATH=$PATH:/usr/local/bin