The best way to install and use GNU GCC 10 is to install first, build-essential package, which will pull in the GNU GCC 9.2, and then install the GNU GCC 10. In fact, it is possible to install only GNU GCC 10 packages, but build-essential brings with it many additional packages, which are mandatory for the configuration and compiling stages.
GNU GCC is included in the official Ubuntu Focal repository! It just needs to be installed and made to be the default compiler.
Install build-essential ensures all generic packages to be installed, which are involved in the building process of a software product.
There are three steps to install and use GNU GCC 10 under Ubuntu 20.04:
- Install build-essential package.
- Install gcc-10 packages (g++, too).
- Make GNU GCC 10 default compiler – use update-alternatives to point the GNU GCC 10 as the default compiler
Four simple lines and the third is a little bit more complex:
apt update -y apt upgrade -y apt install -y build-essential apt install -y gcc-10 g++-10 cpp-10 update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-10 100 --slave /usr/bin/g++ g++ /usr/bin/g++-10 --slave /usr/bin/gcov gcov /usr/bin/gcov-10
Always update and upgrade before installing new software. Use sudo before each command, if installation is performed by a user other than root:
sudo apt update -y sudo apt upgrade -y sudo apt install -y build-essential sudo apt install -y gcc-10 g++-10 cpp-10 sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-10 100 --slave /usr/bin/g++ g++ /usr/bin/g++-10 --slave /usr/bin/gcov gcov /usr/bin/gcov-10
It is a good idea to install cmake package, in addition to the above, because cmake is not included in build-essential:
apt install -y cmake
The apt output of installing GNU GCC 10
Many additional packages like multiple perl modules, libraries and make are installed.
Keep on reading!