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singrium
Asked: 2018-10-26 06:18:20 +0800 CST

Install gcc 5 on Ubuntu 18.04

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I have gcc 7.3.0 on Ubuntu 18.04. But I am working on a project where I need gcc less than version 6. When I tried to install gcc 5.4 using sudo apt install gcc-5.4, I got this error:

Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package gcc-5.4
E: Couldn't find any package by glob 'gcc-5.4'
E: Couldn't find any package by regex 'gcc-5.4'

What is the appropriate way to install gcc 5.4?

compiling gcc 18.04

1 Answers

  1. Best Answer

    Thanks to @steeldriver, I could solve the problem as following:

    Install gcc and g++

    sudo apt install g++-5
sudo apt install gcc-5

    Change the symlink to point to gcc 5 and g++ 5

    sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-5 10
sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-5 20
sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-5 10
sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-5 20
sudo update-alternatives --install /usr/bin/cc cc /usr/bin/gcc 30
sudo update-alternatives --set cc /usr/bin/gcc
sudo update-alternatives --install /usr/bin/c++ c++ /usr/bin/g++ 30
sudo update-alternatives --set c++ /usr/bin/g++

    Credits: How to choose the default gcc and g++ version?

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