1. wget https://gcc.gnu.org/pub/gcc/releases/gcc-3.0/gcc-3.0.tar.gz
    2. tar -xzvf gcc-9.3.0.tar.gz
    3. cd gcc-9.3.0
    4. ./contrib/download_prerequisites
    5. ./configure --prefix=/usr/lib/gcc/x86_64-redhat-linux/9.3.0/ --enable-checking=release --enable-languages=c,c++ --disable-multilib
    6. make && make install
    7. gcc --version