[boost] [test] Non-standard preprocessor directive used

boost.test currently uses the warning preprocessor directive which isn't defined in the standard. This causes warnings by the compiler. cxx: Warning: /src/boost-HEAD/boost/test/impl/execution_monitor.ipp, line 60: #11-D unrecognized preprocessing directive # warning Debugger check disabled. Either define _WIN32_WINNT or include Boost.Test header in front of winbase.h -------^ Might it make sense to use #error instead? Markus