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/* -*- 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.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* 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
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _diag_control_h
#define _diag_control_h
#include "pcap/compiler-tests.h"
#ifndef _MSC_VER
/*
* Clang and GCC both support this way of putting pragmas into #defines.
* We don't use it unless we have a compiler that supports it; the
* warning-suppressing pragmas differ between Clang and GCC, so we test
* for both of those separately.
*/
#define PCAP_DO_PRAGMA(x) _Pragma (#x)
#endif
/*
* Suppress Flex warnings.
*/
#if defined(_MSC_VER)
/*
* This is Microsoft Visual Studio; we can use __pragma(warning(disable:XXXX))
* and __pragma(warning(push/pop)).
*
* Suppress signed-vs-unsigned comparison, narrowing, and unreachable
* code warnings.
*/
#define DIAG_OFF_FLEX \
__pragma(warning(push)) \
__pragma(warning(disable:4127)) \
__pragma(warning(disable:4242)) \
__pragma(warning(disable:4244)) \
__pragma(warning(disable:4702))
#define DIAG_ON_FLEX __pragma(warning(pop))
#elif PCAP_IS_AT_LEAST_CLANG_VERSION(2,8)
/*
* This is Clang 2.8 or later; we can use "clang diagnostic
* ignored -Wxxx" and "clang diagnostic push/pop".
*
* Suppress -Wdocumentation warnings; GCC doesn't support -Wdocumentation,
* at least according to the GCC 7.3 documentation. Apparently, Flex
* generates code that upsets at least some versions of Clang's
* -Wdocumentation.
*/
#define DIAG_OFF_FLEX \
PCAP_DO_PRAGMA(clang diagnostic push) \
PCAP_DO_PRAGMA(clang diagnostic ignored "-Wsign-compare") \
PCAP_DO_PRAGMA(clang diagnostic ignored "-Wdocumentation") \
PCAP_DO_PRAGMA(clang diagnostic ignored "-Wmissing-noreturn") \
PCAP_DO_PRAGMA(clang diagnostic ignored "-Wunused-parameter") \
PCAP_DO_PRAGMA(clang diagnostic ignored "-Wunreachable-code")
#define DIAG_ON_FLEX \
PCAP_DO_PRAGMA(clang diagnostic pop)
#elif PCAP_IS_AT_LEAST_GNUC_VERSION(4,6)
/*
* This is GCC 4.6 or later, or a compiler claiming to be that.
* We can use "GCC diagnostic ignored -Wxxx" (introduced in 4.2)
* and "GCC diagnostic push/pop" (introduced in 4.6).
*/
#define DIAG_OFF_FLEX \
PCAP_DO_PRAGMA(GCC diagnostic push) \
PCAP_DO_PRAGMA(GCC diagnostic ignored "-Wsign-compare") \
PCAP_DO_PRAGMA(GCC diagnostic ignored "-Wunused-parameter") \
PCAP_DO_PRAGMA(GCC diagnostic ignored "-Wunreachable-code")
#define DIAG_ON_FLEX \
PCAP_DO_PRAGMA(GCC diagnostic pop)
#else
/*
* Neither Visual Studio, nor Clang 2.8 or later, nor GCC 4.6 or later
* or a compiler claiming to be that; there's nothing we know of that
* we can do.
*/
#define DIAG_OFF_FLEX
#define DIAG_ON_FLEX
#endif
#ifdef YYBYACC
/*
* Berkeley YACC.
*
* It generates a global declaration of yylval, or the appropriately
* prefixed version of yylval, in grammar.h, *even though it's been
* told to generate a pure parser, meaning it doesn't have any global
* variables*. Bison doesn't do this.
*
* That causes a warning due to the local declaration in the parser
* shadowing the global declaration.
*
* So, if the compiler warns about that, we turn off -Wshadow warnings.
*
* In addition, the generated code may have functions with unreachable
* code, so suppress warnings about those.
*/
#if defined(_MSC_VER)
/*
* This is Microsoft Visual Studio; we can use
* __pragma(warning(disable:XXXX)) and __pragma(warning(push/pop)).
*/
#define DIAG_OFF_BISON_BYACC \
__pragma(warning(push)) \
__pragma(warning(disable:4702))
#define DIAG_ON_BISON_BYACC __pragma(warning(pop))
#elif PCAP_IS_AT_LEAST_CLANG_VERSION(2,8)
/*
* This is Clang 2.8 or later; we can use "clang diagnostic
* ignored -Wxxx" and "clang diagnostic push/pop".
*/
#define DIAG_OFF_BISON_BYACC \
PCAP_DO_PRAGMA(clang diagnostic push) \
PCAP_DO_PRAGMA(clang diagnostic ignored "-Wshadow") \
PCAP_DO_PRAGMA(clang diagnostic ignored "-Wunreachable-code")
#define DIAG_ON_BISON_BYACC \
PCAP_DO_PRAGMA(clang diagnostic pop)
#elif PCAP_IS_AT_LEAST_GNUC_VERSION(4,6)
/*
* This is GCC 4.6 or later, or a compiler claiming to be that.
* We can use "GCC diagnostic ignored -Wxxx" (introduced in 4.2)
* and "GCC diagnostic push/pop" (introduced in 4.6).
*/
#define DIAG_OFF_BISON_BYACC \
PCAP_DO_PRAGMA(GCC diagnostic push) \
PCAP_DO_PRAGMA(GCC diagnostic ignored "-Wshadow") \
PCAP_DO_PRAGMA(GCC diagnostic ignored "-Wunreachable-code")
#define DIAG_ON_BISON_BYACC \
PCAP_DO_PRAGMA(GCC diagnostic pop)
#else
/*
* Neither Clang 2.8 or later nor GCC 4.6 or later or a compiler
* claiming to be that; there's nothing we know of that we can do.
*/
#define DIAG_OFF_BISON_BYACC
#define DIAG_ON_BISON_BYACC
#endif
#else
/*
* Bison.
*
* The generated code may have functions with unreachable code, so
* suppress warnings about those.
*/
#if defined(_MSC_VER)
/*
* This is Microsoft Visual Studio; we can use
* __pragma(warning(disable:XXXX)) and __pragma(warning(push/pop)).
*
* Suppress some /Wall warnings.
*/
#define DIAG_OFF_BISON_BYACC \
__pragma(warning(push)) \
__pragma(warning(disable:4127)) \
__pragma(warning(disable:4242)) \
__pragma(warning(disable:4244)) \
__pragma(warning(disable:4702))
#define DIAG_ON_BISON_BYACC __pragma(warning(pop))
#elif PCAP_IS_AT_LEAST_CLANG_VERSION(2,8)
/*
* This is Clang 2.8 or later; we can use "clang diagnostic
* ignored -Wxxx" and "clang diagnostic push/pop".
*/
#define DIAG_OFF_BISON_BYACC \
PCAP_DO_PRAGMA(clang diagnostic push) \
PCAP_DO_PRAGMA(clang diagnostic ignored "-Wunreachable-code")
#define DIAG_ON_BISON_BYACC \
PCAP_DO_PRAGMA(clang diagnostic pop)
#elif PCAP_IS_AT_LEAST_GNUC_VERSION(4,6)
/*
* This is GCC 4.6 or later, or a compiler claiming to be that.
* We can use "GCC diagnostic ignored -Wxxx" (introduced in 4.2)
* and "GCC diagnostic push/pop" (introduced in 4.6).
*/
#define DIAG_OFF_BISON_BYACC \
PCAP_DO_PRAGMA(GCC diagnostic push) \
PCAP_DO_PRAGMA(GCC diagnostic ignored "-Wunreachable-code")
#define DIAG_ON_BISON_BYACC \
PCAP_DO_PRAGMA(GCC diagnostic pop)
#else
/*
* Neither Clang 2.8 or later nor GCC 4.6 or later or a compiler
* claiming to be that; there's nothing we know of that we can do.
*/
#define DIAG_OFF_BISON_BYACC
#define DIAG_ON_BISON_BYACC
#endif
#endif
#endif /* _diag_control_h */
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