debug/warning-nop.c

   1 /* Dummy nop functions to elicit link-time warnings.
   2    Copyright (C) 2005-2018 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    In addition to the permissions in the GNU Lesser General Public
  11    License, the Free Software Foundation gives you unlimited
  12    permission to link the compiled version of this file with other
  13    programs, and to distribute those programs without any restriction
  14    coming from the use of this file. (The GNU Lesser General Public
  15    License restrictions do apply in other respects; for example, they
  16    cover modification of the file, and distribution when not linked
  17    into another program.)
  18
  19    Note that people who make modified versions of this file are not
  20    obligated to grant this special exception for their modified
  21    versions; it is their choice whether to do so. The GNU Lesser
  22    General Public License gives permission to release a modified
  23    version without this exception; this exception also makes it
  24    possible to release a modified version which carries forward this
  25    exception.
  26
  27    The GNU C Library is distributed in the hope that it will be useful,
  28    but WITHOUT ANY WARRANTY; without even the implied warranty of
  29    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  30    Lesser General Public License for more details.
  31
  32    You should have received a copy of the GNU Lesser General Public
  33    License along with the GNU C Library; if not, see
  34    <http://www.gnu.org/licenses/>.  */
  35
  36 #include <sys/cdefs.h>
  37
  38 static void
  39 __attribute__ ((used))
  40 nop (void)
  41 {
  42 }
  43
  44 /* Don't insert any other #include's before this #undef!  */
  45
  46 #undef __warndecl
  47 #define __warndecl(name, msg) \
  48   extern void name (void) __attribute__ ((alias ("nop"))) attribute_hidden; \
  49   link_warning (name, msg)
  50
  51 #undef  __USE_FORTIFY_LEVEL
  52 #define __USE_FORTIFY_LEVEL 99
  53
  54 /* Following here we need an #include for each public header file
  55    that uses __warndecl.  */
  56
  57 /* Define away to avoid warnings with compilers that do not have these
  58    builtins.  */
  59 #define __builtin___memcpy_chk(dest, src, len, bos) NULL
  60 #define __builtin___memmove_chk(dest, src, len, bos) NULL
  61 #define __builtin___mempcpy_chk(dest, src, len, bos) NULL
  62 #define __builtin___memset_chk(dest, ch, len, bos) NULL
  63 #define __builtin___stpcpy_chk(dest, src, bos) NULL
  64 #define __builtin___strcat_chk(dest, src, bos) NULL
  65 #define __builtin___strcpy_chk(dest, src, bos) NULL
  66 #define __builtin___strncat_chk(dest, src, len, bos) NULL
  67 #define __builtin___strncpy_chk(dest, src, len, bos) NULL
  68 #define __builtin_object_size(bos, level) 0
  69
  70 #include <string.h>