[boost] [test] Unrecognized option -u

Hi, I'm seeing test errors about unrecognized option -u presumably from Boost.Test, see here for example: http://www.boost.org/development/tests/develop/developer/output/teeks99-09b-... The test in question is not mine, and I don't know what the -u option is supposed to be for, but I assume it was supported by Boost.Test at some point and now it isn't. Is this an intended change in Boost.Test, an oversight or just a mistake in the Jamfile? If it was supported by Boost.Test, what did the option do and is it ok to just remove it?