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How to resolve the error : 'Package gcc-8 has no installation candidate' ? I'm trying to install it by sudo-apt install gcc-8

rated 0 times [ 1] [ 0] / answers: 1 / hits: 4237 / 3 Years ago, sat, september 18, 2021, 6:04:33

I am trying to install OpenFace toolkit on my system using Ubuntu 20.04 Terminal. The installation requires gcc/g++ version 8 for installation. I checked the current gcc version on my system, and it shows that the installed version is gcc-11. Is there a way of replacing the gcc-11 version with gcc-8, or of downloading the gcc-8 package, and then installing it? help would be appreciated, thanks.

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etzelmortg

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answered 3 Years ago bewre · Accepted Answer

The gcc-8 package has been discontinued in the Ubuntu 22.04 and later default repositories, but it is still available in the Ubuntu 20.04 default repositories. To install the gcc-8 package from Ubuntu 20.04 in Ubuntu 22.04 run the following commands:

sudo apt update

wget http://mirrors.kernel.org/ubuntu/pool/universe/g/gcc-8/gcc-8_8.4.0-3ubuntu2_amd64.deb

wget http://mirrors.edge.kernel.org/ubuntu/pool/universe/g/gcc-8/gcc-8-base_8.4.0-3ubuntu2_amd64.deb

wget http://mirrors.kernel.org/ubuntu/pool/universe/g/gcc-8/libgcc-8-dev_8.4.0-3ubuntu2_amd64.deb

wget http://mirrors.kernel.org/ubuntu/pool/universe/g/gcc-8/cpp-8_8.4.0-3ubuntu2_amd64.deb

wget http://mirrors.kernel.org/ubuntu/pool/universe/g/gcc-8/libmpx2_8.4.0-3ubuntu2_amd64.deb

wget http://mirrors.kernel.org/ubuntu/pool/main/i/isl/libisl22_0.22.1-1_amd64.deb

sudo apt install ./libisl22_0.22.1-1_amd64.deb ./libmpx2_8.4.0-3ubuntu2_amd64.deb ./cpp-8_8.4.0-3ubuntu2_amd64.deb ./libgcc-8-dev_8.4.0-3ubuntu2_amd64.deb ./gcc-8-base_8.4.0-3ubuntu2_amd64.deb ./gcc-8_8.4.0-3ubuntu2_amd64.deb

Original answer (now obsolete):

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

sudo apt update

sudo apt remove gcc-11 # optional

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

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

I removed gcc-11 in the above commands because you mentioned in your question that you also wanted to remove it. If you want to keep gcc-11 installed alongside gcc-8 then omit the sudo apt remove gcc-11 command.