1/* Header with interface version macros for library pieces copied elsewhere.
 2   Copyright (C) 1995-2025 Free Software Foundation, Inc.
 3   This file is part of the GNU C Library.
 4
 5   The GNU C Library is free software; you can redistribute it and/or
 6   modify it under the terms of the GNU Lesser General Public
 7   License as published by the Free Software Foundation; either
 8   version 2.1 of the License, or (at your option) any later version.
 9
10   The GNU C Library is distributed in the hope that it will be useful,
11   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13   Lesser General Public License for more details.
14
15   You should have received a copy of the GNU Lesser General Public
16   License along with the GNU C Library; if not, see
17   <https://www.gnu.org/licenses/>.  */
18
19#ifndef _GNU_VERSIONS_H
20#define	_GNU_VERSIONS_H	1
21
22/* This file exists to define these few macros.  Each specifies a version
23   number associated with the library interface of a piece of the C library
24   which is also distributed with other GNU packages.  These pieces are
25   both part of the GNU C library and also distributed with other GNU
26   packages so those packages may use their facilities on systems lacking
27   the GNU C library.  The source files for each piece surround all their
28   code with `#ifndef ELIDE_CODE' after defining it with this:
29
30   #define OBSTACK_INTERFACE_VERSION 1
31   #if !defined (_LIBC) && defined (__GNU_LIBRARY__) && __GNU_LIBRARY__ > 1
32   #include <gnu-versions.h>
33   #if _GNU_OBSTACK_INTERFACE_VERSION == OBSTACK_INTERFACE_VERSION
34   #define ELIDE_CODE
35   #endif
36   #endif
37
38   This allows those one to avoid compiling those files when part of a GNU
39   package not libc, on a system using a GNU C library that supports the
40   same interface.
41
42   Please preserve the format of the comments after each macro.  And
43   remember, if any of these versions change, the libc.so major version
44   number must change too (so avoid it)!  */
45
46#define _GNU_OBSTACK_INTERFACE_VERSION	1 /* vs malloc/obstack.c */
47#define _GNU_REGEX_INTERFACE_VERSION	1 /* vs posix/regex.c */
48#define _GNU_GLOB_INTERFACE_VERSION	2 /* vs posix/glob.c */
49#define _GNU_GETOPT_INTERFACE_VERSION	2 /* vs posix/getopt.c and
50					     posix/getopt1.c */
51
52#endif	/* gnu-versions.h */