add linux ppoll syscall wrapper

include/poll.h

@@ -5,6 +5,8 @@
 extern "C" {
 #endif
 
+#incluce <features.h>
+
 #define POLLIN     0x001
 #define POLLPRI    0x002
 #define POLLOUT    0x004
@@ -28,6 +30,14 @@ struct pollfd
 
 int poll (struct pollfd *, nfds_t, int);
 
+#ifdef _GNU_SOURCE
+#define __NEED_time_t
+#define __NEED_struct_timespec
+#define __NEED_sigset_t
+#include <bits/alltypes.h>
+int ppoll(struct pollfd *, nfds_t, const struct timespec *, const sigset_t *);
+#endif
+
 #ifdef __cplusplus
 }
 #endif

src/linux/ppoll.c

+#define _GNU_SOURCE
+#include <poll.h>
+#include "syscall.h"
+
+int ppoll(struct pollfd *fds, nfds_t n, const struct timespec *to, const sigset_t *mask)
+{
+	struct timespec tmp = *to;
+	return syscall_cp(SYS_ppoll, fds, n, &tmp, mask);
+}