216 lines
8.1 KiB
C
216 lines
8.1 KiB
C
/* -*- Mode: c; tab-width: 8; indent-tabs-mode: 1; c-basic-offset: 8; -*- */
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/*
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* Copyright (c) 1993, 1994, 1995, 1996, 1997
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the Computer Systems
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* Engineering Group at Lawrence Berkeley Laboratory.
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* 4. Neither the name of the University nor of the Laboratory may be used
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* to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _diag_control_h
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#define _diag_control_h
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#include "pcap/compiler-tests.h"
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#ifndef _MSC_VER
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/*
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* Clang and GCC both support this way of putting pragmas into #defines.
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* We don't use it unless we have a compiler that supports it; the
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* warning-suppressing pragmas differ between Clang and GCC, so we test
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* for both of those separately.
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*/
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#define PCAP_DO_PRAGMA(x) _Pragma (#x)
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#endif
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/*
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* Suppress Flex warnings.
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*/
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#if defined(_MSC_VER)
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/*
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* This is Microsoft Visual Studio; we can use __pragma(warning(disable:XXXX))
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* and __pragma(warning(push/pop)).
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*
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* Suppress signed-vs-unsigned comparison, narrowing, and unreachable
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* code warnings.
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*/
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#define DIAG_OFF_FLEX \
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__pragma(warning(push)) \
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__pragma(warning(disable:4127)) \
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__pragma(warning(disable:4242)) \
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__pragma(warning(disable:4244)) \
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__pragma(warning(disable:4702))
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#define DIAG_ON_FLEX __pragma(warning(pop))
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#elif PCAP_IS_AT_LEAST_CLANG_VERSION(2,8)
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/*
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* This is Clang 2.8 or later; we can use "clang diagnostic
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* ignored -Wxxx" and "clang diagnostic push/pop".
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*
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* Suppress -Wdocumentation warnings; GCC doesn't support -Wdocumentation,
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* at least according to the GCC 7.3 documentation. Apparently, Flex
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* generates code that upsets at least some versions of Clang's
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* -Wdocumentation.
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*/
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#define DIAG_OFF_FLEX \
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PCAP_DO_PRAGMA(clang diagnostic push) \
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PCAP_DO_PRAGMA(clang diagnostic ignored "-Wsign-compare") \
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PCAP_DO_PRAGMA(clang diagnostic ignored "-Wdocumentation") \
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PCAP_DO_PRAGMA(clang diagnostic ignored "-Wmissing-noreturn") \
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PCAP_DO_PRAGMA(clang diagnostic ignored "-Wunused-parameter") \
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PCAP_DO_PRAGMA(clang diagnostic ignored "-Wunreachable-code")
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#define DIAG_ON_FLEX \
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PCAP_DO_PRAGMA(clang diagnostic pop)
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#elif PCAP_IS_AT_LEAST_GNUC_VERSION(4,6)
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/*
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* This is GCC 4.6 or later, or a compiler claiming to be that.
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* We can use "GCC diagnostic ignored -Wxxx" (introduced in 4.2)
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* and "GCC diagnostic push/pop" (introduced in 4.6).
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*/
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#define DIAG_OFF_FLEX \
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PCAP_DO_PRAGMA(GCC diagnostic push) \
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PCAP_DO_PRAGMA(GCC diagnostic ignored "-Wsign-compare") \
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PCAP_DO_PRAGMA(GCC diagnostic ignored "-Wunused-parameter") \
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PCAP_DO_PRAGMA(GCC diagnostic ignored "-Wunreachable-code")
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#define DIAG_ON_FLEX \
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PCAP_DO_PRAGMA(GCC diagnostic pop)
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#else
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/*
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* Neither Visual Studio, nor Clang 2.8 or later, nor GCC 4.6 or later
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* or a compiler claiming to be that; there's nothing we know of that
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* we can do.
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*/
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#define DIAG_OFF_FLEX
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#define DIAG_ON_FLEX
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#endif
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#ifdef YYBYACC
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/*
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* Berkeley YACC.
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*
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* It generates a global declaration of yylval, or the appropriately
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* prefixed version of yylval, in grammar.h, *even though it's been
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* told to generate a pure parser, meaning it doesn't have any global
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* variables*. Bison doesn't do this.
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*
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* That causes a warning due to the local declaration in the parser
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* shadowing the global declaration.
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*
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* So, if the compiler warns about that, we turn off -Wshadow warnings.
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*/
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#if defined(_MSC_VER)
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/*
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* This is Microsoft Visual Studio; we can use
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* __pragma(warning(disable:XXXX)) and __pragma(warning(push/pop)).
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*
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* Suppress unreachable code warnings.
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*/
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#define DIAG_OFF_BISON_BYACC \
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__pragma(warning(push)) \
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__pragma(warning(disable:4702))
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#define DIAG_ON_BISON_BYACC __pragma(warning(pop))
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#elif PCAP_IS_AT_LEAST_CLANG_VERSION(2,8)
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/*
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* This is Clang 2.8 or later; we can use "clang diagnostic
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* ignored -Wxxx" and "clang diagnostic push/pop".
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*/
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#define DIAG_OFF_BISON_BYACC \
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PCAP_DO_PRAGMA(clang diagnostic push) \
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PCAP_DO_PRAGMA(clang diagnostic ignored "-Wshadow") \
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PCAP_DO_PRAGMA(clang diagnostic ignored "-Wunreachable-code")
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#define DIAG_ON_BISON_BYACC \
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PCAP_DO_PRAGMA(clang diagnostic pop)
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#elif PCAP_IS_AT_LEAST_GNUC_VERSION(4,6)
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/*
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* This is GCC 4.6 or later, or a compiler claiming to be that.
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* We can use "GCC diagnostic ignored -Wxxx" (introduced in 4.2)
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* and "GCC diagnostic push/pop" (introduced in 4.6).
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*/
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#define DIAG_OFF_BISON_BYACC \
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PCAP_DO_PRAGMA(GCC diagnostic push) \
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PCAP_DO_PRAGMA(GCC diagnostic ignored "-Wshadow") \
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PCAP_DO_PRAGMA(GCC diagnostic ignored "-Wunreachable-code")
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#define DIAG_ON_BISON_BYACC \
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PCAP_DO_PRAGMA(GCC diagnostic pop)
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#else
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/*
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* Neither Clang 2.8 or later nor GCC 4.6 or later or a compiler
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* claiming to be that; there's nothing we know of that we can do.
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*/
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#define DIAG_OFF_BISON_BYACC
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#define DIAG_ON_BISON_BYACC
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#endif
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#else
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/*
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* Bison.
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*/
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#if defined(_MSC_VER)
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/*
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* This is Microsoft Visual Studio; we can use
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* __pragma(warning(disable:XXXX)) and __pragma(warning(push/pop)).
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*
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* Suppress some /Wall warnings.
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*/
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#define DIAG_OFF_BISON_BYACC \
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__pragma(warning(push)) \
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__pragma(warning(disable:4127)) \
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__pragma(warning(disable:4242)) \
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__pragma(warning(disable:4244)) \
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__pragma(warning(disable:4702))
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#define DIAG_ON_BISON_BYACC __pragma(warning(pop))
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#elif PCAP_IS_AT_LEAST_CLANG_VERSION(2,8)
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/*
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* This is Clang 2.8 or later; we can use "clang diagnostic
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* ignored -Wxxx" and "clang diagnostic push/pop".
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*/
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#define DIAG_OFF_BISON_BYACC \
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PCAP_DO_PRAGMA(clang diagnostic push) \
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PCAP_DO_PRAGMA(clang diagnostic ignored "-Wunreachable-code")
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#define DIAG_ON_BISON_BYACC \
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PCAP_DO_PRAGMA(clang diagnostic pop)
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#elif PCAP_IS_AT_LEAST_GNUC_VERSION(4,6)
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/*
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* This is GCC 4.6 or later, or a compiler claiming to be that.
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* We can use "GCC diagnostic ignored -Wxxx" (introduced in 4.2)
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* and "GCC diagnostic push/pop" (introduced in 4.6).
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*/
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#define DIAG_OFF_BISON_BYACC \
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PCAP_DO_PRAGMA(GCC diagnostic push) \
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PCAP_DO_PRAGMA(GCC diagnostic ignored "-Wunreachable-code")
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#define DIAG_ON_BISON_BYACC \
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PCAP_DO_PRAGMA(GCC diagnostic pop)
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#else
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/*
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* Neither Clang 2.8 or later nor GCC 4.6 or later or a compiler
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* claiming to be that; there's nothing we know of that we can do.
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*/
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#define DIAG_OFF_BISON_BYACC
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#define DIAG_ON_BISON_BYACC
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#endif
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#endif
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#endif /* _diag_control_h */
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