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?
51 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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