```
yum install -y gmp-devel mpfr-devel libmpc-devel
mkdir -p build && cd build
curl -L ftp://ftp.mirrorservice.org/sites/sourceware.org/pub/gcc/releases/gcc-8.2.0/gcc-8.2.0.tar.gz  | tar xzf -
cd gcc-8.2.0/
./configure --prefix=/usr/local -enable-languages=c,c++,fortran --disable-multilib
make -j
make install
```