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      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