How to install latest gcc on Ubuntu LTS (12.04, 14.04, 16.04)

how-to-install-latest-gcc-on-ubuntu-lts.txt

These commands are based on a askubuntu answer http://askubuntu.com/a/581497
To install gcc-6 (gcc-6.1.1), I had to do more stuff as shown below.
USE THOSE COMMANDS AT YOUR OWN RISK. I SHALL NOT BE RESPONSIBLE FOR ANYTHING.
ABSOLUTELY NO WARRANTY.

If you are still reading let's carry on with the code.

sudo apt-get update && \
sudo apt-get install build-essential software-properties-common -y && \
sudo add-apt-repository ppa:ubuntu-toolchain-r/test -y && \
sudo apt-get update && \
sudo apt-get install gcc-snapshot -y && \
sudo apt-get update && \
sudo apt-get install gcc-6 g++-6 -y && \
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-6 60 --slave /usr/bin/g++ g++ /usr/bin/g++-6 && \
sudo apt-get install gcc-4.8 g++-4.8 -y && \
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.8 60 --slave /usr/bin/g++ g++ /usr/bin/g++-4.8;

When completed, you must change to the gcc you want to work with by default. Type in your terminal:
sudo update-alternatives --config gcc

To verify if it worked. Just type in your terminal
gcc -v

If everything went fine you should see gcc 6.1.1  by the time I am writing this gist

Happy coding!

See my blog post at https://www.application2000.com

@alexandreelise weird thing to say based on two comments on related gist from someone with multiple 1500+ star repos, but okay? I found this gist while looking for info on how to install the latest GCC on Ubuntu 16, so past version 9, which is what the other gist I commented on was for. Of course, I had been hoping someone had posted a copy-paste solution for gcc 10 already, but that was unfortunately not the case. I might add a comment with instructions if I can make some of the stackoverflow posts I managed to find work.

As for @jasonbeach's sadism remark, that's unfortunately far too real: I'm forced to work on a project that's still stuck on Ubuntu 16.04.7 (and not even kernel 4.15, but 4.4). I wish it wasn't, reality is not always so kind. There are way too many projects still stuck on 8 year old code bases running on even older infrastructure. I'm just trying to find anything that will let me get these projects migrated off of these dead versions of ubuntu.