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?
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++
sudo apt install gcc-5– steeldriver Oct 25 '18 at 14:24apt search gcc-5orapt search gcc-6– abu-ahmed al-khatiri Oct 25 '18 at 14:25gcc --version, I still get 7.3.0 – singrium Oct 25 '18 at 14:29/usr/bin/gccwill still point togcc-7. You can either change the symlink (manually - or viaupdate-alternatives) or simply callgcc-5explicitly when you need it – steeldriver Oct 25 '18 at 14:40update-alternatives– singrium Oct 25 '18 at 15:09