I've been trying to compile the chrono "hello world" example with MinGW/GCC 4.4.0, but it fails. I then tried to compile the tests, and saw similar errors. The docs say this compiler is supported, has anyone else tried this? Here's the error chain: .\boost_1_47_0/boost/type_traits/common_type.hpp: At global scope: .\boost_1_47_0/boost/type_traits/common_type.hpp: In instantiation of 'boost::common_type': .\boost_1_47_0/boost/chrono/duration.hpp:252: instantiated from 'ToDuration boost::chrono::detail::duration_cast_aux::operator()(const FromDuration&) const [with FromDuration = boost::chrono::duration >, ToDuration = boost::chrono::duration >, Period = boost::ratio<1ll, 10000000ll>]' .\boost_1_47_0/boost/chrono/duration.hpp:311: instantiated from 'ToDuration boost::chrono::detail::duration_cast::operator() (const FromDuration&) const [with FromDuration = boost::chrono::duration >, ToDuration = boost::chrono::duration >]' .\boost_1_47_0/boost/chrono/duration.hpp:472: instantiated from 'boost::chrono::duration::duration(const boost::chrono::duration&, typename boost::enable_if, boost::mpl::not_, mpl_::bool_<true>, mpl_::bool_<true>, mpl_::bool_<true> >, mpl_::bool_<false>, mpl_::bool_<false>, mpl_::bool_<false> >, void>::type*) [with Rep2 = long long int, Period2 = boost::ratio<1ll, 10000000ll>, Rep = double, Period = boost::ratio<1ll, 1ll>]' ...\test.cpp:96: instantiated from here .\boost_1_47_0/boost/type_traits/common_type.hpp:77: error: no type named 'type' in 'struct boost::common_type'