The test is currently failing on the following line: ( BOOST_ROOT/boost/math/special_functions/hypot.hpp line 32) BOOST_ASSERT(std::numeric_limits<T>::is_specialized); I believe the problem is Borland's traditional bad handling of const parameters with templates. In the case of this test, T deduces as const double, so of course numeric limits is not specialized. I believe the workaround will be to detect Borland compiler, and do a remove_const on T for the whole function, or perhaps detect const and forward to an explicit call to the non-const function. A similar patch would be applied to: expm1.hpp log1p.hpp Are the library maintainers interested in supporting such a patch? Should we introduce the type_traits dependency (Checking for the Borland platform first?) Should we look to patch mainline, or 1.34 branch. The only active regression testing on Borland is on the 1.34 branch at the moment. -- AlisdairM