rocky linux 8.6安装使用gcc 9的方法总结

dnf -y install gcc-toolset-9-gcc gcc-toolset-9-gcc-c++ 

source /opt/rh/gcc-toolset-9/enable

dnf group install "Development Tools" 
dnf --enablerepo=PowerTools install libmpc-devel

wget http://gnu.mirror.constant.com/gcc/gcc-9.2.0/gcc-9.2.0.tar.gz

tar zxf gcc-9.2.0.tar.gz

mkdir gcc-build
cd gcc-build

../gcc-9.2.0/configure --enable-languages=c,c++ --disable-multilib
make -j $(nproc)
make install