it seems, there is a problem in boost.math in trunk. the boost.heap testsuite originally used boost.random, but the test farm reports some issues: In file included from ../boost/math/special_functions.hpp:32, from ../boost/random/generate_canonical.hpp:22, from ../boost/random.hpp:52, from ../libs/heap/test/mutable_heap_tests.hpp:1, from ../libs/heap/test/fibonacci_heap_test.cpp:12: ../boost/math/special_functions/expint.hpp: In function ???void boost::math::detail::expint_i_imp_113a(T&, const T&)???: ../boost/math/special_functions/expint.hpp:1028: error: expected primary- expression before ???(??? token (compare http://tinyurl.com/bqfputx) for now, i've reverted to the libc random() function to work around this issue, but it would be great, if someone with insights in boost.math could have a look. thanks, tim