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

GNU/Linux KDE Neon Installing GCC 12.1 from Source – QuickStart Guide

Hi! This tutorial will guide you step-by-step on How to Install GNU Compiler Collection 12.1.x from Source in KDE Neon GNU/Linux Desktop.

And the GCC 12.1 for KDE Neon Linux is a Compilers Collection currently supporting C, C++, Objective-C, Objective-C++, Fortran, Ada, D, Go, and BRIG (HSAIL) Languages.

Finally, GCC 12.1 includes several New Features, Changes, and Fixes that you can consult on the GNU GCC Documentation.

1. 1. Launching Terminal

   Open a Shell Terminal emulator window
   Just start Typing “konsole” on Desktop.
   (Press “Enter” to Execute Commands)

   
   And Update Apt Repository:

   sudo apt update

   Authenticate with the User Admin Pass.
   If Got “User is Not in Sudoers file” then see: How to Enable sudo.

2. 2. Querying System GCC

   First, find out what the actual System GCC
   Play:

   which gcc

   Take Note of the PATH to use after installation for switching the System GCC.
   Possibly to Check the current GCC version issue:

   gcc -v

3. 3. Downloading GCC 12.1

   Download GCC 12.1 Source Code for GNU/Linux

   GCC 12.1 Source tar.gz

   Downloading GCC 12.1 for GNU/Linux Systems
   Navigate to the 12.1.x Folder to Grab the Package.

4. 4. Extracting GCC 12.1

   Then to Extract GCC 12.1 Archive
   If it does Not Open automatically then Double-Click/Right-Click to Open with Archive Manager:

   Or from Command Line:

   tar xvzf ~/Downloads/gcc-12.*.tar.gz

   (But if downloaded with Firefox it may be instead into /tmp/mozilla*)
   Finally, if you are in Trouble to Find Out it on Terminal See: How to Access Downloads Folder from Browser.