--- Libc/Libc-997.1.1/include/string.h
+++ Libc/Libc-763.11/include/string.h
@@ -59,10 +59,20 @@
 #define	_STRING_H_
 
 #include <_types.h>
+
 #include <sys/cdefs.h>
 #include <Availability.h>
-#include <sys/_types/_size_t.h>
-#include <sys/_types/_null.h>
+
+#ifndef	_SIZE_T
+#define	_SIZE_T
+typedef	__darwin_size_t		size_t;
+#endif
+
+#ifndef NULL
+#define NULL __DARWIN_NULL
+#endif /* ! NULL */
+
+
 
 /* ANSI-C */
 
@@ -143,21 +153,15 @@
 __END_DECLS
 #endif /* __DARWIN_C_LEVEL >= 200809L */
 
-/* C11 Annex K */
-
-#if defined(__STDC_WANT_LIB_EXT1__) && __STDC_WANT_LIB_EXT1__ >= 1
-#include <sys/_types/_rsize_t.h>
-#include <sys/_types/_errno_t.h>
-
-__BEGIN_DECLS
-errno_t	memset_s(void *, rsize_t, int, rsize_t) __OSX_AVAILABLE_STARTING(__MAC_10_9, __IPHONE_7_0);
-__END_DECLS
+
+
+/* Darwin extensions */
+
+#if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
+#ifndef _SSIZE_T
+#define _SSIZE_T
+typedef __darwin_ssize_t	ssize_t;
 #endif
-
-/* Darwin extensions */
-
-#if __DARWIN_C_LEVEL >= __DARWIN_C_FULL
-#include <sys/_types/_ssize_t.h>
 
 __BEGIN_DECLS
 void	*memmem(const void *, size_t, const void *, size_t) __OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_4_3);