#ifdef __USE_POSIX
# ifdef __USE_POSIX199309
+/* We need `struct timespec' later on. */
+# define __need_timespec
+# include <time.h>
+
/* Get the `siginfo_t' type plus the needed symbols. */
# include <bits/siginfo.h>
# endif
extern int sigwait __P ((__const sigset_t *__set, int *__sig));
# ifdef __USE_POSIX199309
-/* This type actually is defined in <time.h>. */
-struct timespec;
-
/* Select any of pending signals from SET and place information in INFO. */
extern int sigwaitinfo __P ((__const sigset_t *__set, siginfo_t *__info));