xref: /aosp_15_r20/external/libpcap/varattrs.h (revision 8b26181f966a6af5cf6981a6f474313de533bb28)

/* -*- Mode: c; tab-width: 8; indent-tabs-mode: 1; c-basic-offset: 8; -*- */
/*
 * Copyright (c) 1993, 1994, 1995, 1996, 1997
 *	The Regents of the University of California.  All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
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 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the Computer Systems
 *	Engineering Group at Lawrence Berkeley Laboratory.
 * 4. Neither the name of the University nor of the Laboratory may be used
 *    to endorse or promote products derived from this software without
 *    specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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 */

#ifndef varattrs_h
#define varattrs_h

#include <pcap/compiler-tests.h>

/*
 * Attributes to apply to variables, using various compiler-specific
 * extensions.
 */

#if __has_attribute(unused) \
    || PCAP_IS_AT_LEAST_GNUC_VERSION(2,0)
  /*
   * Compiler with support for __attribute__((unused)), or GCC 2.0 and
   * later, so it supports __attribute__((unused)).
   */
  #define _U_ __attribute__((unused))
#else
  /*
   * We don't know of any way to mark a variable as unused.
   */
  #define _U_
#endif

#endif