The Tcpdump Group git mirrors - tcpdump/blob - diag-control.h

   1 /* -*- Mode: c; tab-width: 8; indent-tabs-mode: 1; c-basic-offset: 8; -*- */
   2 /*
   3  * Copyright (c) 1993, 1994, 1995, 1996, 1997
   4  *      The Regents of the University of California.  All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. All advertising materials mentioning features or use of this software
  15  *    must display the following acknowledgement:
  16  *      This product includes software developed by the Computer Systems
  17  *      Engineering Group at Lawrence Berkeley Laboratory.
  18  * 4. Neither the name of the University nor of the Laboratory may be used
  19  *    to endorse or promote products derived from this software without
  20  *    specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #ifndef _diag_control_h
  36 #define _diag_control_h
  37
  38 #include "compiler-tests.h"
  39
  40 #ifndef _MSC_VER
  41   /*
  42    * Clang and GCC both support this way of putting pragmas into #defines.
  43    * We don't use it unless we have a compiler that supports it; the
  44    * warning-suppressing pragmas differ between Clang and GCC, so we test
  45    * for both of those separately.
  46    */
  47   #define DIAG_DO_PRAGMA(x) _Pragma (#x)
  48 #endif
  49
  50 /*
  51  * The current clang compilers also define __GNUC__ and __GNUC_MINOR__
  52  * thus we need to test the clang case before the GCC one
  53  */
  54 #if ND_IS_AT_LEAST_CLANG_VERSION(2,8)
  55   /*
  56    * Clang complains if you OR together multiple enum values of a
  57    * given enum type and them pass it as an argument of that enum
  58    * type.  Some libcap-ng routines use enums to define bit flags;
  59    * we want to squelch the warnings that produces.
  60    */
  61   #define DIAG_OFF_ASSIGN_ENUM \
  62     DIAG_DO_PRAGMA(clang diagnostic push) \
  63     DIAG_DO_PRAGMA(clang diagnostic ignored "-Wassign-enum")
  64   #define DIAG_ON_ASSIGN_ENUM \
  65     DIAG_DO_PRAGMA(clang diagnostic pop)
  66
  67   /*
  68    * It also legitimately complains about some code in the BSD
  69    * getopt_long() - that code explicitly and deliberately
  70    * violates the contract by permuting the argument vector
  71    * (declared as char const *argv[], meaning "I won't change
  72    * the vector by changing any of its elements), as do the
  73    * GNU and Solaris getopt_long().  This is documented in the
  74    * man pages for all versions; it can be suppressed by setting
  75    * the environment variable POSIXLY_CORRECT or by putting a "+"
  76    * at the beginning of the option string.
  77    *
  78    * We suppress the warning.
  79    */
  80   #define DIAG_OFF_CAST_QUAL \
  81     DIAG_DO_PRAGMA(clang diagnostic push) \
  82     DIAG_DO_PRAGMA(clang diagnostic ignored "-Wcast-qual")
  83   #define DIAG_ON_CAST_QUAL \
  84     DIAG_DO_PRAGMA(clang diagnostic pop)
  85
  86   /*
  87    * Suppress deprecation warnings.
  88    */
  89   #define DIAG_OFF_DEPRECATION \
  90     DIAG_DO_PRAGMA(clang diagnostic push) \
  91     DIAG_DO_PRAGMA(clang diagnostic ignored "-Wdeprecated-declarations")
  92   #define DIAG_ON_DEPRECATION \
  93     DIAG_DO_PRAGMA(clang diagnostic pop)
  94   #define DIAG_OFF_FORMAT_TRUNCATION
  95   #define DIAG_ON_FORMAT_TRUNCATION
  96 #elif ND_IS_AT_LEAST_GNUC_VERSION(4,2)
  97   /* GCC apparently doesn't complain about ORing enums together. */
  98   #define DIAG_OFF_ASSIGN_ENUM
  99   #define DIAG_ON_ASSIGN_ENUM
 100
 101   /*
 102    * It does, however, complain about casting away constness in
 103    * missing/getopt_long.c.
 104    */
 105   #define DIAG_OFF_CAST_QUAL \
 106     DIAG_DO_PRAGMA(GCC diagnostic push) \
 107     DIAG_DO_PRAGMA(GCC diagnostic ignored "-Wcast-qual")
 108   #define DIAG_ON_CAST_QUAL \
 109     DIAG_DO_PRAGMA(GCC diagnostic pop)
 110
 111   /*
 112    * Suppress deprecation warnings.
 113    */
 114   #define DIAG_OFF_DEPRECATION \
 115     DIAG_DO_PRAGMA(GCC diagnostic push) \
 116     DIAG_DO_PRAGMA(GCC diagnostic ignored "-Wdeprecated-declarations")
 117   #define DIAG_ON_DEPRECATION \
 118     DIAG_DO_PRAGMA(GCC diagnostic pop)
 119 #else
 120   #define DIAG_OFF_ASSIGN_ENUM
 121   #define DIAG_ON_ASSIGN_ENUM
 122   #define DIAG_OFF_CAST_QUAL
 123   #define DIAG_ON_CAST_QUAL
 124   #define DIAG_OFF_DEPRECATION
 125   #define DIAG_ON_DEPRECATION
 126 #endif
 127
 128 #endif /* _diag_control_h */