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Ubuntu 18.10 – how to install a specific version of gcc – CentOS

Disclaimer: I have searched and read similar posts and they do not answer my question.

I am running Ubuntu 18.10 and need to install gcc 8.2.0 to build kernel modules. apt-get wants to install 8.3 which doesn’t match how my kernel was built.

I have tried

sudo apt-get update
sudo apt-get install gcc:8.2.0

but I get the error message that the package could not be found.

I tried going the route of installing 8.3 and then building 8.2.0 and installing it into /usr/local/bin. It worked for a few modules but when I tried building kernel modules for VMWare it complained that the package was not installed correctly. I am a CentOS guy so a little out of my element on debian based distros.

I located gcc 8.2.0 here as part of the core for Cosmic (18.10) but I am unsure how to install it.

I also tried:

sudo apt-get install gcc=4:8.2.0-1ubuntu1 --no-upgrade

and it still wants to install 8.3. Do I need to change the defaults for this to work? It completely ignores the –no-upgrade option.

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2

Answers


  1. 0

    You need to use the equals sign instead of the colon.

    sudo apt-get install gcc=4:8.2.0-1ubuntu1

    You’ll also need to update your default gcc config.

    How to change the default GCC compiler in Ubuntu?

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  2. 0

    I wanted to install gcc-6 alongside my existing installation of gcc-9 and this is how I did it. First off, sudo apt install gcc-6 didn’t work because the package wasn’t found so I had to add a new repository that contained gcc-6. To do this, I first found a repository that contains gcc-6 from Google and ended up at: https://packages.ubuntu.com/bionic/gcc-6

    From there, I chose an architecture (amd64) which took me to a page with all the mirrors. I added the first mirror (mirrors.kernel.org/ubuntu) to /etc/apt/sources.list and did sudo apt update and then installed gcc-6 with sudo apt install gcc-6.

    To switch between gcc versions, I used the following:

    sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-6 6
sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-9 9

sudo update-alternatives --config g++
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