How to find out the version of OF libraries (especially boost)?

Is there a way to get the version of boost (or other libs that are shipped with OF)?
Alternatively: Does anyone know which boost version is used?
My idea is to compile boost with thread support for Emscripten…
Last post does work for me, but I guess I compiled the wrong (the current) boost version:

Found the version here (1.66.0): https://github.com/openframeworks/apothecary/blob/master/apothecary/formulas/boost/boost.sh

I tried to compile the libs with the docker image: https://github.com/openframeworks/apothecary/blob/master/docker/README.md
It works well for Linux libs, but does not work for Emscripten because “em++ : not found”.
How can I use em++ with the Docker image?