the POLL prefix is in the reserved namespace for poll.h, so no feature test macro checks are needed.
@@ -18,6 +18,7 @@ extern "C" {
#define POLLWRNORM 0x100
#define POLLWRBAND 0x200
#define POLLMSG 0x400
+#define POLLRDHUP 0x2000
typedef unsigned long nfds_t;