Step-by-step – GCC 11.2 CentOS 8.x/Stream-8 Installation

Switching

8. 8. Switching System GCC

   (Optional) Finally, to easy Managing GCC Versions use Alternatives
   So now to Set System for to manage a Multi Compiler.
   First, possibly disable the existing Target with:

   sudo mv /usr/local/bin/gcc /usr/local/bin/gcc.bak

   Then to Add the New GCC with alternatives use:

   sudo alternatives --install /usr/local/bin/gcc gcc /usr/bin/x86_64-redhat-linux-gcc 20

   Again Add the System GCC:

   sudo alternatives --install /usr/local/bin/gcc gcc /usr/bin/gcc 10

   (The Setup is working if as of default /usr/local/bin is preceding /usr/bin on the $PATH Env Var)
   Next to Switch between GCC Versions play:

   sudo alternatives --config gcc

   Last, to test the GCC in use:

   gcc -v

   If not working then you may need to amend the User’s PATH with:

   echo "export PATH=/etc/alternatives:$PATH" >> ~/.bashrc

   And then to Reload it simply run:

   bash



Congratulations, your GCC 11.2 should be now nicely working on CentOS 8. Good Luck! :)