On Aug 26, 2012 4:17 PM, "H.J. Lu" wrote: > > Hi, > > According to > > http://gcc.gnu.org/ml/libstdc++/2010-04/msg00064.html > > One reason of --enable-libstdcxx-time=no on Linux is > "not all users will want for an experimental c++0x mode." > Is this feature still experimental today?
See http://gcc.gnu.org/ml/libstdc++/2012-05/msg00085.html I'm working on a patch to enable it by default and to define this_thread::sleep_xxx and this_thread::yield unconditionally. --enable-libstdcxx-time=rt is still needed for a high-resolution std::system_clock and that causes unacceptable performance overhead in single-threaded code, because clock_gettime needs librt which depends on libpthread which causes libstdc++'s reference-counting to use atomic operations.
