Step-by-step – How to Install GCC 12.1 on KDE Neon

Switching

8. 8. Switching System GCC

   Finally, to easy Managing GCC Versions use update-alternatives
   So first install the New GCC 12.1.x with, for instance:

   sudo update-alternatives --install /usr/bin/gcc gcc /usr/local/bin/x86_64-pc-linux-gnu-gcc-12.1.0 10

   In case, replace 12.1.0 with your current version in the above Command.
   To check it run:

   ls /usr/local/bin | grep gcc-12

   The grep Command refine the output List showing only the Entries matching the Keyword.
   And then the to Setup also the System GCC use:

   sudo update-alternatives --install /usr/bin/gcc gcc /usr/local/bin/gcc 20

   Next to Switch between GCC Versions play:

   sudo update-alternatives --config gcc

   Last, to test the GCC in use:

   gcc -v

   


Congratulations, your GCC 12.1 should be now nicely working on KDE Neon Linux. Good Luck! :)