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How to solve "Package 'g++-8' has no installation candidate" error on Ubuntu 22.04?

rated 0 times [ 1] [ 0] / answers: 1 / hits: 1407 / 2 Years ago, sat, april 30, 2022, 8:28:11

I am using the gcc/g++ compilers as a part of the OpenFace installation process on my Ubuntu 22.04 based system. While downloading and installing the gcc, it automatically downloads the latest g++-11 version, whereas I require g++-8 version for the software to run. How can I replace/install the g++-8 package on my system without it auto-updating to g++-11? Help would be appreciated!

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answered 2 Years ago utschang · Accepted Answer

The g++-8 package has been discontinued in the Ubuntu 22.04 and later default repositories. To install the g++-8 package from Ubuntu 21.10 in Ubuntu 22.04 run the following commands:

sudo apt update

wget http://mirrors.kernel.org/ubuntu/pool/universe/g/gcc-8/g++-8_8.5.0-0ubuntu4_amd64.deb 

wget http://mirrors.kernel.org/ubuntu/pool/universe/g/gcc-8/gcc-8_8.5.0-0ubuntu4_amd64.deb

wget http://mirrors.kernel.org/ubuntu/pool/universe/g/gcc-8/gcc-8-base_8.5.0-0ubuntu4_amd64.deb

wget http://mirrors.kernel.org/ubuntu/pool/universe/g/gcc-8/libgcc-8-dev_8.5.0-0ubuntu4_amd64.deb

wget http://mirrors.kernel.org/ubuntu/pool/universe/g/gcc-8/cpp-8_8.5.0-0ubuntu4_amd64.deb

wget http://mirrors.kernel.org/ubuntu/pool/universe/g/gcc-8/libmpx2_8.5.0-0ubuntu4_amd64.deb

wget http://mirrors.kernel.org/ubuntu/pool/universe/g/gcc-8/libstdc++-8-dev_8.5.0-0ubuntu4_amd64.deb

sudo apt install ./libmpx2_8.5.0-0ubuntu4_amd64.deb ./cpp-8_8.5.0-0ubuntu4_amd64.deb ./gcc-8-base_8.5.0-0ubuntu4_amd64.deb ./libgcc-8-dev_8.5.0-0ubuntu4_amd64.deb ./gcc-8_8.5.0-0ubuntu4_amd64.deb ./libstdc++-8-dev_8.5.0-0ubuntu4_amd64.deb ./g++-8_8.5.0-0ubuntu4_amd64.deb