/* -*- 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 */