[boost] how to mark test as "expected fail" for some toolsets

Hello, I'd like to mark the begin_end test of uBLAS as compile-fail for MSVC 7.1 ([1]). However I was not able to figure out how this works. Does anyone have some insights (or maybe a patch) to do this? [1] http://www.boost.org/development/tests/trunk/developer/output/daw-msvc71-boo... mfg Gunter