On 12 November 2015 at 16:38, Tim Prince wrote: > 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. We've been using nanosleep there pretty much unchanged for about three years. The only recent change is to check its return value and inspect errno. > 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() ? The missing include is fixed at r230266.