How to get intellisense working for boost.test with vscode on mac?

Question

Has anyone got intellisense working for c++ boost.test with Visual Studio code?

boost is installed in /usr/local/Cellar/boost/1.80.0/include

Things have tried:

1. add the above path to c++ intellisense configuration as /usr/local/Cellar/boost/1.80.0/include/**
2. add -L /usr/local/Cellar/boost/1.80.0/include to compiler args in to c++ intellisense configuration
3. add -L /usr/local/Cellar/boost/1.80.0/include to compiler args in to tasks.json
4. add path to settings.json as browse path and/or include path

Not working so far.