sysdeps/unix/sysv/linux/errlist-compat.h

   1 /* Linux sys_errlist compatibility macro definitions.
   2    Copyright (C) 2020-2021 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 _ERRLIST_COMPAT_H
  20 #define _ERRLIST_COMPAT_H
  21
  22 #include <shlib-compat.h>
  23
  24 /* Define new compat symbols for symbols  _sys_errlist, sys_errlist,
  25    _sys_nerr, and sys_nerr for version VERSION with NUMBERERR times number of
  26    bytes per long int size.
  27    Both _sys_errlist and sys_errlist alias to _sys_errlist_internal symbol
  28    (defined on errlist.c) while _sys_nerr and sys_nerr created new variable
  29    with the expected size.  */
  30 #define DEFINE_COMPAT_ERRLIST(NUMBERERR, VERSION)                            \
  31   const int __##VERSION##_sys_nerr = NUMBERERR;                              \
  32   strong_alias (__##VERSION##_sys_nerr, __##VERSION##__sys_nerr);            \
  33   declare_symbol_alias (__ ## VERSION ## _sys_errlist, _sys_errlist_internal,\
  34                         object, NUMBERERR * (ULONG_WIDTH / UCHAR_WIDTH));    \
  35   declare_symbol_alias (__ ## VERSION ## __sys_errlist,                      \
  36                         _sys_errlist_internal, object,                       \
  37                         NUMBERERR * (ULONG_WIDTH / UCHAR_WIDTH));            \
  38   compat_symbol (libc, __## VERSION ## _sys_nerr, sys_nerr, VERSION);        \
  39   compat_symbol (libc, __## VERSION ## __sys_nerr, _sys_nerr, VERSION);      \
  40   compat_symbol (libc, __## VERSION ## _sys_errlist, sys_errlist, VERSION);  \
  41   compat_symbol (libc, __## VERSION ## __sys_errlist, _sys_errlist, VERSION);\
  42
  43 #endif