1 /* Header with interface version macros for library pieces copied elsewhere. 2 Copyright (C) 1995, 1996, 1997 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, write to the Free 17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 18 02111-1307 USA. */ 19 20 #ifndef _GNU_VERSIONS_H 21 #define _GNU_VERSIONS_H 1 22 23 /* This file exists to define these few macros. Each specifies a version 24 number associated with the library interface of a piece of the C library 25 which is also distributed with other GNU packages. These pieces are 26 both part of the GNU C library and also distributed with other GNU 27 packages so those packages may use their facilities on systems lacking 28 the GNU C library. The source files for each piece surround all their 29 code with `#ifndef ELIDE_CODE' after defining it with this: 30 31 #define OBSTACK_INTERFACE_VERSION 1 32 #if !defined (_LIBC) && defined (__GNU_LIBRARY__) && __GNU_LIBRARY__ > 1 33 #include <gnu-versions.h> 34 #if _GNU_OBSTACK_INTERFACE_VERSION == OBSTACK_INTERFACE_VERSION 35 #define ELIDE_CODE 36 #endif 37 #endif 38 39 This allows those one to avoid compiling those files when part of a GNU 40 package not libc, on a system using a GNU C library that supports the 41 same interface. 42 43 Please preserve the format of the comments after each macro. And 44 remember, if any of these versions change, the libc.so major version 45 number must change too (so avoid it)! */ 46 47 #define _GNU_OBSTACK_INTERFACE_VERSION 1 /* vs malloc/obstack.c */ 48 #define _GNU_REGEX_INTERFACE_VERSION 1 /* vs posix/regex.c */ 49 #define _GNU_GLOB_INTERFACE_VERSION 1 /* vs posix/glob.c */ 50 #define _GNU_GETOPT_INTERFACE_VERSION 2 /* vs posix/getopt.c and 51 posix/getopt1.c */ 52 53 #endif /* gnu-versions.h */ 54
