1/* Multiple versions of mempcpy.
2 All versions must be listed in ifunc-impl-list.c.
3 Copyright (C) 2017-2022 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <https://www.gnu.org/licenses/>. */
19
20/* Define multiple versions only for the definition in libc. */
21#if IS_IN (libc)
22# define mempcpy __redirect_mempcpy
23# define __mempcpy __redirect___mempcpy
24# define NO_MEMPCPY_STPCPY_REDIRECT
25# define __NO_STRING_INLINES
26# include <string.h>
27# undef mempcpy
28# undef __mempcpy
29
30# define SYMBOL_NAME mempcpy
31# include "ifunc-memmove.h"
32
33libc_ifunc_redirected (__redirect_mempcpy, __mempcpy, IFUNC_SELECTOR ());
34
35weak_alias (__mempcpy, mempcpy)
36# ifdef SHARED
37__hidden_ver1 (__mempcpy, __GI___mempcpy, __redirect___mempcpy)
38 __attribute__ ((visibility ("hidden"))) __attribute_copy__ (mempcpy);
39__hidden_ver1 (mempcpy, __GI_mempcpy, __redirect_mempcpy)
40 __attribute__ ((visibility ("hidden"))) __attribute_copy__ (mempcpy);
41# endif
42#endif
43

source code of glibc/sysdeps/x86_64/multiarch/mempcpy.c