cmath.hpp adds overloads to namespace std. You can't do that. (17.4.3.1/1)
Well, you can, but it makes you a very, very bad person ;^) I've moved them into boost::units for the next update. Thanks for catching that. Matthias ---------------------------------------------------------------- Matthias Schabel 2859 Glen Oaks Drive Salt Lake City, UT 84109 801-706-5760 (cell) 801-484-0811 (home) matthias at stanfordalumni dot org ----------------------------------------------------------------  ---------------------------------------------------------------- Matthias Schabel, Ph.D. Assistant Professor, Department of Radiology Utah Center for Advanced Imaging Research 729 Arapeen Drive Salt Lake City, UT 84108 801-587-9413 (work) 801-585-3592 (fax) 801-706-5760 (cell) 801-484-0811 (home) matthias dot schabel at hsc dot utah dot edu ----------------------------------------------------------------