#endif /* <signal.h> included. */
-#ifdef __USE_POSIX
-
# if !defined __sigset_t_defined \
- && (defined _SIGNAL_H || defined __need_sigset_t)
+ && ((defined _SIGNAL_H && defined __USE_POSIX) || defined __need_sigset_t)
typedef __sigset_t sigset_t;
# define __sigset_t_defined 1
# endif /* `sigset_t' not defined and <signal.h> or need `sigset_t'. */
# undef __need_sigset_t
+#ifdef __USE_POSIX
+
# ifdef _SIGNAL_H
/* We need `struct timespec' later on. */