I have a c++ project I would like to convert to a web application. For this purpose, I would like to use Emscripten to build the project.The project uses some external libraries. I managed to compile or find the JavaScript version of most libraries and now I am stuck with the Boost ones. Actually I do not even know how to start for Boost: they use a boostrap script to generate the files to build the libraries. It is possible to pass the toolset to this script but Emscripten is obviously not supported.My project uses the following parts of Boost: Thread, Regex, FileSystem, Signals, System. How can I link these libraries using Emscripten?