--- /dev/null
+++ Libc/Libc-1725.40.4/include/secure/_strings.h
@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 2017, 2023 Apple Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+#ifndef __STRINGS_H_
+# error "Never use <secure/_strings.h> directly; include <strings.h> instead."
+#endif
+
+#ifndef _SECURE__STRINGS_H_
+#define _SECURE__STRINGS_H_
+
+#include <sys/cdefs.h>
+#include <Availability.h>
+#include <secure/_common.h>
+
+#if _USE_FORTIFY_LEVEL > 0
+
+/* bcopy and bzero */
+
+/* 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__)
+#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
+#undef bzero
+/* void	bzero(void *s, size_t n) */
+#define bzero(...) __bzero_chk_func (__VA_ARGS__)
+#endif
+
+#endif
+
+#endif /* _USE_FORTIFY_LEVEL > 0 */
+#endif /* _SECURE__STRINGS_H_ */