I was trying to use the shmem library on darwin and ran into errors because darwin does not have a clock_gettime function. I believe there needs to be something like a BOOST_HAS_CLOCK_GETTIME in config.hpp -- either there, or in shmem. Then the following patch for shmem would probably be appropriate: --- shmemlib-0-orig/boost/shmem/sync/xtime.hpp 2005-12-30 19:32:02.000000000 +0000 +++ shmemlib-0/boost/shmem/sync/xtime.hpp 2006-04-11 22:24:09.000000000 +0000 @@ -102,12 +102,19 @@ #else - + + #if defined BOOST_HAS_CLOCK_GETTIME timespec ts; clock_gettime(CLOCK_REALTIME, &ts); xtp->sec = ts.tv_sec; xtp->nsec = ts.tv_nsec; - return clock_type; + #else + struct timeval tv; + if (gettimeofday (&tv, 0) == 0) { + xtp->sec = tv.tv_sec; + xtp->nsec = tv.tv_usec*1000; + } + #endif #endif return clock_type; With this patch, I am able to get the examples in shmem to build. Unfortunately, it then fails in boost::shmem::detail::mutexattr_wrapper::mutexattr_wrapper because pthread_mutexattr_init fails. I can go into more info about the problems with shmem on darwin if this is useful to anyone. I realize this may be the wrong list for this post since shmem is still in 0.9 development, so please point me in the right direction if so. -Ian Fasel