[PATCH] declaration of ppoll() by poll.h should be guarded by _GNU_SOURCE

[Jon Turney]

Signed-off-by: Jon Turney <jon.tur...@dronecode.org.uk>
---
 winsup/cygwin/include/sys/poll.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/winsup/cygwin/include/sys/poll.h b/winsup/cygwin/include/sys/poll.h
index 8228278..0da4c3f 100644
--- a/winsup/cygwin/include/sys/poll.h
+++ b/winsup/cygwin/include/sys/poll.h
@@ -39,9 +39,11 @@ struct pollfd {
 typedef unsigned int nfds_t;
 
 extern int poll __P ((struct pollfd *fds, nfds_t nfds, int timeout));
+#if __GNU_VISIBLE
 extern int ppoll __P ((struct pollfd *fds, nfds_t nfds,
                       const struct timespec *timeout_ts,
                       const sigset_t *sigmask));
+#endif
 
 __END_DECLS
 
-- 
2.8.3