How to install the version of libzmq available in 20.04 (focal fossa) to ubuntu 18.04?

To ensure that you are installing the version of the libzmq library that is available in ubuntu 20.04 (focal fossa) on Ubuntu 18.04, you can follow these steps:

1. Add the repository for Ubuntu 20.04 to your sources list:

echo "deb http://archive.ubuntu.com/ubuntu/ focal main restricted universe multiverse" | sudo tee -a /etc/apt/sources.list

2. Update the package list:

sudo apt update

3. Install the libzmq package from the Ubuntu 20.04 repository:

sudo apt install libzmq5

This will install the version of the libzmq library that is available in Ubuntu 20.04 on your Ubuntu 18.04 system. Note that you may need to install other dependencies if they are not already present on your system.

Note:

Keep in mind that this process may install other packages and libraries from Ubuntu 20.04 as well, which could potentially cause compatibility issues or other problems. If you are concerned about this, you may want to consider building and installing the libzmq libray from source, or using a package manager specifically designed for installing libraries from different distributions.

For more information about installing and using the libzmq library, you can refer to the documentation or seek help on a forum or online community dedicated to C++ programming or the ZeroMQ library.