[Boost-users] Using a part of a Jamfile.v2

I was thinking about tweaking a library in Boost.  Its BOOST_ROOT/libs/math/test/ directory is shared with some other libraries, so there's a lot of test files and the shared Jamfile.v2 used to make the tests is huge.  Is there a way to restrict which targets are built from the command line?  Right now, it takes MANY hours to go through every test.  (When I did something similar last week with another library, I just commented out all the other libraries sharing the file.  Do I have to resort to that all the time?) Daryle W.