includes/cdefs.h

   1 /* cdefs.h
   2
   3    Standard C definitions... */
   4
   5 /*
   6  * Copyright (c) 1995 RadioMail Corporation.  All rights reserved.
   7  * Copyright (c) 2011 by Internet Systems Consortium, Inc. ("ISC")
   8  * Copyright (c) 2004,2009 by Internet Systems Consortium, Inc. ("ISC")
   9  * Copyright (c) 1996-2003 by Internet Software Consortium
  10  *
  11  * Permission to use, copy, modify, and distribute this software for any
  12  * purpose with or without fee is hereby granted, provided that the above
  13  * copyright notice and this permission notice appear in all copies.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
  16  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  17  * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
  18  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  19  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  20  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
  21  * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  22  *
  23  *   Internet Systems Consortium, Inc.
  24  *   950 Charter Street
  25  *   Redwood City, CA 94063
  26  *   <info@isc.org>
  27  *   https://www.isc.org/
  28  *
  29  * This software was written for RadioMail Corporation by Ted Lemon
  30  * under a contract with Vixie Enterprises.   Further modifications have
  31  * been made for Internet Systems Consortium under a contract
  32  * with Vixie Laboratories.
  33  */
  34
  35 #if !defined (__ISC_DHCP_CDEFS_H__)
  36 #define __ISC_DHCP_CDEFS_H__
  37 /* Delete attributes if not gcc or not the right version of gcc. */
  38 #if !defined(__GNUC__) || __GNUC__ < 2 || \
  39         (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || defined (darwin)
  40 #define __attribute__(x)
  41 #endif
  42
  43 #if (defined (__GNUC__) || defined (__STDC__)) && !defined (BROKEN_ANSI)
  44 #define PROTO(x)        x
  45 #define KandR(x)
  46 #define ANSI_DECL(x)    x
  47 #if defined (__GNUC__)
  48 #define INLINE          inline
  49 #else
  50 #define INLINE
  51 #endif /* __GNUC__ */
  52 #else
  53 #define PROTO(x)        ()
  54 #define KandR(x)        x
  55 #define ANSI_DECL(x)
  56 #define INLINE
  57 #endif /* __GNUC__ || __STDC__ */
  58
  59 /* The following macro handles the case of unwanted return values.  In
  60  * GCC one can specify an attribute for a function to generate a warning
  61  * if the return value of the function is ignored and one can't dispose of
  62  * the warning by the use of void.  In conjunction with the use of -Werror
  63  * these warnings prohibit the compilation of the package.  This macro
  64  * allows us to assign the return value to a variable and then ignore it.
  65  */
  66 #if !defined(__GNUC__) || (__GNUC__ < 4)
  67 #define IGNORE_RET(x) (void) x
  68 #else
  69 #define IGNORE_RET(x)                   \
  70         do {                            \
  71                 int ignore_return;      \
  72                 ignore_return = x;      \
  73         } while (0)
  74 #endif
  75
  76 #endif /* __ISC_DHCP_CDEFS_H__ */