I'm currently trying to install some software (NUFEB) onto my home PC which is running Ubuntu version 19.10. This requires my computer to have the GNU C and C++ compilers gcc-5 and g++-5. I do not have these on this PC; I have gcc-9 and g++-9.
Does anyone know how I might be able to install g++-5 and gcc-5 on Ubuntu 19.10?
Please note that neither
sudo apt install g++-5
or
sudo apt-get install build-essentials
work!
