I see that the current trunk chooses to configure so as to depend on a compatible nanosleep() regardless of the ability of the target system to support that (e.g. cygwin64). I haven't been able to see whether there is a configure option or a prerequisites download installation to take care of it. The reported compile error has to do with undefined errno and associated macros in the nanosleep() call. Is there an include missing from the libstdc++ source where it calls nanosleep() ?
