# endif
#endif
-/* Put this after #includes because <unistd.h> defines _XOPEN_*. */
+/* Put this after #includes because <unistd.h> defines _XOPEN_*.
+ * Sock_size_t is defined identically in pp_sys.c. */
#ifndef Sock_size_t
-# if _XOPEN_VERSION >= 5 || defined(_XOPEN_SOURCE_EXTENDED) || defined(__GLIBC__)
-# define Sock_size_t Size_t
+# ifdef HAS_SOCKLEN_T
+# define Sock_size_t socklen_t
# else
-# define Sock_size_t int
+# if _XOPEN_VERSION >= 5 || defined(_XOPEN_SOURCE_EXTENDED) || defined(__GLIBC__)
+# define Sock_size_t Size_t
+# else
+# define Sock_size_t int
+# endif
# endif
#endif