[Boost-users] numeric::interval library an Alpha processor under OSF1

Hello, I would like to use the numeric::interval library on an Alpha EV 6.8 processor under the OSF1 operating system. My program runs fine under Linux on a Pentium 4, but on the Alpha machine, g++ tells me: boost/numeric/interval/hw_rounding.hpp:26:4: #error Boost.Numeric.Interval: Please specify rounding control mechanism. What has to be done? Where do I have to specifiy the rounding controls, how much do I need to know about processor internals etc? Which tests can and have to be done afterwards? Thanks for any advice! Best regards, Erwin