...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
You might want to use the location of the project-root in your Jamfiles. To do it, you'd need to declare path constant in your project-root.jam:
path-constant TOP : . ;
After that, the TOP
variable can be used in every Jamfile.