Hi, here are the steps that worked for me , 2022 August .
here official guide is https://github.com/meetecho/janus-gateway
This seeks to help those who have had a problem in installing based on the other guides so this may be an option.
By the way this will install the latest version of janus [Assuming branch is master] .
Make sure you have c++ base compiler or c++ env are set globally other most builds will fail . make sure CMAKE_CXX_COMPILER
is found .
run the following steps
sudo aptitude install libmicrohttpd-dev
sudo aptitude install libmicrohttpd-dev