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glibc/include/gnu-versions.h
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/* Header with interface version macros for library pieces copied elsewhere. | |
Copyright (C) 1995-2016 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
The GNU C Library is free software; you can redistribute it and/or | |
modify it under the terms of the GNU Lesser General Public | |
License as published by the Free Software Foundation; either | |
version 2.1 of the License, or (at your option) any later version. | |
The GNU C Library is distributed in the hope that it will be useful, | |
but WITHOUT ANY WARRANTY; without even the implied warranty of | |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
Lesser General Public License for more details. | |
You should have received a copy of the GNU Lesser General Public | |
License along with the GNU C Library; if not, see | |
<http://www.gnu.org/licenses/>. */ | |
#ifndef _GNU_VERSIONS_H | |
#define _GNU_VERSIONS_H 1 | |
/* This file exists to define these few macros. Each specifies a version | |
number associated with the library interface of a piece of the C library | |
which is also distributed with other GNU packages. These pieces are | |
both part of the GNU C library and also distributed with other GNU | |
packages so those packages may use their facilities on systems lacking | |
the GNU C library. The source files for each piece surround all their | |
code with `#ifndef ELIDE_CODE' after defining it with this: | |
#define OBSTACK_INTERFACE_VERSION 1 | |
#if !defined (_LIBC) && defined (__GNU_LIBRARY__) && __GNU_LIBRARY__ > 1 | |
#include <gnu-versions.h> | |
#if _GNU_OBSTACK_INTERFACE_VERSION == OBSTACK_INTERFACE_VERSION | |
#define ELIDE_CODE | |
#endif | |
#endif | |
This allows those one to avoid compiling those files when part of a GNU | |
package not libc, on a system using a GNU C library that supports the | |
same interface. | |
Please preserve the format of the comments after each macro. And | |
remember, if any of these versions change, the libc.so major version | |
number must change too (so avoid it)! */ | |
#define _GNU_OBSTACK_INTERFACE_VERSION 1 /* vs malloc/obstack.c */ | |
#define _GNU_REGEX_INTERFACE_VERSION 1 /* vs posix/regex.c */ | |
#define _GNU_GLOB_INTERFACE_VERSION 1 /* vs posix/glob.c */ | |
#define _GNU_GETOPT_INTERFACE_VERSION 2 /* vs posix/getopt.c and | |
posix/getopt1.c */ | |
#endif /* gnu-versions.h */ |