I attempted to rebuild my Boost installation with nanosecond support for the date-time library. I did so by adding BOOST_DATE_TIME_POSIX_TIME_STD_CONFIG = 1 ; to boost-build.jam and adding <define>BOOST_DATE_TIME_POSIX_TIME_STD_CONFIG to the jamfile in date_time/build. However, when I add this code to my application and compile, it segfaults: boost::posix_time::time_duration time1, time2; time1=boost::posix_time::seconds(3); std::cout << boost::posix_time::to_simple_string(time1) << std::endl; time2=boost::posix_time::nanoseconds(987654321); std::cout << boost::posix_time::to_simple_string(time2) << std::endl; boost::this_thread::sleep(time2); The segfault is at /archive/home/ssiegal/test/include/boost/date_time/posix_time/posix_time_config.hpp:99: (gdb) list 94 { 95 typedef gregorian::date date_type; 96 typedef time_duration time_duration_type; 97 simple_time_rep(date_type d, time_duration_type tod) : 98 day(d), 99 time_of_day(tod) 100 { 101 // make sure we have sane values for date & time 102 if(!day.is_special() && !time_of_day.is_special()){ 103 if(time_of_day >= time_duration_type(24,0,0)) { Anyone else ever see this? Is there anything else I need to do to turn on nanosecond resolution? Thanks very much!