--- Libc/Libc-1725.40.4/include/secure/_strings.h
+++ Libc/Libc-1353.100.2/include/secure/_strings.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, 2023 Apple Inc. All rights reserved.
+ * Copyright (c) 2017 Apple Inc. All rights reserved.
  *
  * @APPLE_LICENSE_HEADER_START@
  *
@@ -21,7 +21,7 @@
  * @APPLE_LICENSE_HEADER_END@
  */
 
-#ifndef __STRINGS_H_
+#ifndef _STRINGS_H_
 # error "Never use <secure/_strings.h> directly; include <strings.h> instead."
 #endif
 
@@ -39,55 +39,18 @@
 /* Removed in Issue 7 */
 #if !defined(_POSIX_C_SOURCE) || _POSIX_C_SOURCE < 200809L
 
-#ifdef __LIBC_STAGED_BOUNDS_SAFETY_ATTRIBUTES
-
-static inline void
-__bcopy_ptrcheck(const void *_LIBC_SIZE(__n) __src, void *const _LIBC_SIZE(__n) __darwin_pass_obsz0 __dst, size_t __n) {
-	memmove(__dst, __src, __n);
-}
-
-static inline void
-__bzero_ptrcheck(void *const _LIBC_SIZE(__n) __darwin_pass_obsz0 __dst, size_t __n) {
-	memset(__dst, 0, __n);
-}
-
-#define __bcopy_chk_func __bcopy_ptrcheck
-#define __bzero_chk_func __bzero_ptrcheck
-
-#else
-
-#ifndef __has_builtin
-#define __undef__has_builtin
-#define __has_builtin(x) defined(__GNUC__)
+#if __has_builtin(__builtin___memmove_chk) || defined(__GNUC__)
+#undef bcopy
+/* void	bcopy(const void *src, void *dst, size_t len) */
+#define bcopy(src, dest, ...) \
+		__builtin___memmove_chk (dest, src, __VA_ARGS__, __darwin_obsz0 (dest))
 #endif
 
-#if __has_builtin(__builtin___memmove_chk)
-#define __bcopy_chk_func(src, dst, ...) \
-	__builtin___memmove_chk(dst, src, __VA_ARGS__, __darwin_obsz0 (dst))
-#endif
-
-#if __has_builtin(__builtin___memset_chk)
-#define __bzero_chk_func(dst, ...) \
-	__builtin___memset_chk(dst, 0, __VA_ARGS__, __darwin_obsz0 (dst))
-#endif
-
-#ifdef __undef__has_builtin
-#undef __undef__has_builtin
-#undef __has_builtin
-#endif
-
-#endif
-
-#ifdef __bcopy_chk_func
-#undef bcopy
-/* void	bcopy(const void *src, void *dst, size_t len) */
-#define bcopy(...) __bcopy_chk_func (__VA_ARGS__)
-#endif
-
-#ifdef __bzero_chk_func
+#if __has_builtin(__builtin___memset_chk) || defined(__GNUC__)
 #undef bzero
 /* void	bzero(void *s, size_t n) */
-#define bzero(...) __bzero_chk_func (__VA_ARGS__)
+#define bzero(dest, ...) \
+		__builtin___memset_chk (dest, 0, __VA_ARGS__, __darwin_obsz0 (dest))
 #endif
 
 #endif