From 84b6bcb2c691796d87b47bfcf815409ca2b9e461 Mon Sep 17 00:00:00 2001
From: Bruno Haible <bruno@clisp.org>
Date: Thu, 10 Jul 2025 11:04:50 +0200
Subject: [PATCH] string-h: Fix compilation error on macOS with fortify.

Reported by Pierre Ossman <ossman@cendio.se> at
<https://savannah.gnu.org/bugs/?67300>.

* lib/string.in.h (memcpy etc.): Don't redeclare functions that are
declared as macros.

Upstream-Status: Backport [https://cgit.git.savannah.gnu.org/cgit/gnulib.git/commit/?id=c44fe03b72687c9e913727724c29bdb49c1f86e3]
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
---
 lib/string.in.h | 58 +++++++++++++++++++++++++++++++++----------------
 1 file changed, 39 insertions(+), 19 deletions(-)

diff --git a/lib/string.in.h b/lib/string.in.h
index e3d94b7..9a039c7 100644
--- a/lib/string.in.h
+++ b/lib/string.in.h
@@ -214,65 +214,85 @@ _GL_EXTERN_C void free (void *);
 
 /* Declarations for ISO C N3322.  */
 #if defined __GNUC__ && __GNUC__ >= 15 && !defined __clang__
+# ifndef memcpy
 _GL_EXTERN_C void *memcpy (void *__dest, const void *__src, size_t __n)
-# if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
+#  if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
   _GL_ATTRIBUTE_NOTHROW
-# endif
+#  endif
   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3)
   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (2, 3);
+# endif
+# ifndef memccpy
 _GL_EXTERN_C void *memccpy (void *__dest, const void *__src, int __c, size_t __n)
-# if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
+#  if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
   _GL_ATTRIBUTE_NOTHROW
-# endif
+#  endif
   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 4)
   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (2, 4);
+# endif
+# ifndef memmove
 _GL_EXTERN_C void *memmove (void *__dest, const void *__src, size_t __n)
-# if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
+#  if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
   _GL_ATTRIBUTE_NOTHROW
-# endif
+#  endif
   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3)
   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (2, 3);
+# endif
+# ifndef strncpy
 _GL_EXTERN_C char *strncpy (char *__dest, const char *__src, size_t __n)
-# if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
+#  if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
   _GL_ATTRIBUTE_NOTHROW
-# endif
+#  endif
   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3)
   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (2, 3);
+# endif
+# ifndef strndup
 _GL_EXTERN_C char *strndup (const char *__s, size_t __n)
-# if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
+#  if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
   _GL_ATTRIBUTE_NOTHROW
-# endif
+#  endif
   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 2);
+# endif
+# ifndef strncat
 _GL_EXTERN_C char *strncat (char *__dest, const char *__src, size_t __n)
-# if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
+#  if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
   _GL_ATTRIBUTE_NOTHROW
-# endif
+#  endif
   _GL_ARG_NONNULL ((1)) _GL_ATTRIBUTE_NONNULL_IF_NONZERO (2, 3);
+# endif
+# ifndef memcmp
 _GL_EXTERN_C int memcmp (const void *__s1, const void *__s2, size_t __n)
-# if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
+#  if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
   _GL_ATTRIBUTE_NOTHROW
-# endif
+#  endif
   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3)
   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (2, 3);
+# endif
+# ifndef strncmp
 _GL_EXTERN_C int strncmp (const char *__s1, const char *__s2, size_t __n)
-# if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
+#  if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
   _GL_ATTRIBUTE_NOTHROW
-# endif
+#  endif
   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3)
   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (2, 3);
-# ifndef __cplusplus
+# endif
+# if !defined memchr && !defined __cplusplus
 _GL_EXTERN_C void *memchr (const void *__s, int __c, size_t __n)
   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3);
 _GL_EXTERN_C void *memrchr (const void *__s, int __c, size_t __n)
   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3);
 # endif
+# ifndef memset
 _GL_EXTERN_C void *memset (void *__s, int __c, size_t __n)
-# if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
+#  if __GLIBC__ + (__GLIBC_MINOR__ >= 2) > 2
   _GL_ATTRIBUTE_NOTHROW
-# endif
+#  endif
   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3);
+# endif
+# ifndef memset_explicit
 _GL_EXTERN_C void *memset_explicit (void *__s, int __c, size_t __n)
   _GL_ATTRIBUTE_NONNULL_IF_NONZERO (1, 3);
+# endif
 #endif