Haibo Huang | 165065a | 2018-07-23 17:26:52 -0700 | [diff] [blame] | 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 "pcap/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 PCAP_DO_PRAGMA(x) _Pragma (#x) |
| 48 | #endif |
| 49 | |
| 50 | /* |
| 51 | * Suppress Flex warnings. |
| 52 | */ |
| 53 | #if defined(_MSC_VER) |
| 54 | /* |
| 55 | * This is Microsoft Visual Studio; we can use __pragma(warning(disable:XXXX)) |
| 56 | * and __pragma(warning(push/pop)). |
| 57 | * |
| 58 | * Suppress signed-vs-unsigned comparison, narrowing, and unreachable |
| 59 | * code warnings. |
| 60 | */ |
| 61 | #define DIAG_OFF_FLEX \ |
| 62 | __pragma(warning(push)) \ |
| 63 | __pragma(warning(disable:4127)) \ |
| 64 | __pragma(warning(disable:4242)) \ |
| 65 | __pragma(warning(disable:4244)) \ |
| 66 | __pragma(warning(disable:4702)) |
| 67 | #define DIAG_ON_FLEX __pragma(warning(pop)) |
| 68 | #elif PCAP_IS_AT_LEAST_CLANG_VERSION(2,8) |
| 69 | /* |
| 70 | * This is Clang 2.8 or later; we can use "clang diagnostic |
| 71 | * ignored -Wxxx" and "clang diagnostic push/pop". |
| 72 | * |
| 73 | * Suppress -Wdocumentation warnings; GCC doesn't support -Wdocumentation, |
| 74 | * at least according to the GCC 7.3 documentation. Apparently, Flex |
| 75 | * generates code that upsets at least some versions of Clang's |
| 76 | * -Wdocumentation. |
| 77 | */ |
| 78 | #define DIAG_OFF_FLEX \ |
| 79 | PCAP_DO_PRAGMA(clang diagnostic push) \ |
| 80 | PCAP_DO_PRAGMA(clang diagnostic ignored "-Wsign-compare") \ |
| 81 | PCAP_DO_PRAGMA(clang diagnostic ignored "-Wdocumentation") \ |
| 82 | PCAP_DO_PRAGMA(clang diagnostic ignored "-Wmissing-noreturn") \ |
| 83 | PCAP_DO_PRAGMA(clang diagnostic ignored "-Wunused-parameter") \ |
| 84 | PCAP_DO_PRAGMA(clang diagnostic ignored "-Wunreachable-code") |
| 85 | #define DIAG_ON_FLEX \ |
| 86 | PCAP_DO_PRAGMA(clang diagnostic pop) |
| 87 | #elif PCAP_IS_AT_LEAST_GNUC_VERSION(4,6) |
| 88 | /* |
| 89 | * This is GCC 4.6 or later, or a compiler claiming to be that. |
| 90 | * We can use "GCC diagnostic ignored -Wxxx" (introduced in 4.2) |
| 91 | * and "GCC diagnostic push/pop" (introduced in 4.6). |
| 92 | */ |
| 93 | #define DIAG_OFF_FLEX \ |
| 94 | PCAP_DO_PRAGMA(GCC diagnostic push) \ |
| 95 | PCAP_DO_PRAGMA(GCC diagnostic ignored "-Wsign-compare") \ |
| 96 | PCAP_DO_PRAGMA(GCC diagnostic ignored "-Wunused-parameter") \ |
| 97 | PCAP_DO_PRAGMA(GCC diagnostic ignored "-Wunreachable-code") |
| 98 | #define DIAG_ON_FLEX \ |
| 99 | PCAP_DO_PRAGMA(GCC diagnostic pop) |
| 100 | #else |
| 101 | /* |
| 102 | * Neither Visual Studio, nor Clang 2.8 or later, nor GCC 4.6 or later |
| 103 | * or a compiler claiming to be that; there's nothing we know of that |
| 104 | * we can do. |
| 105 | */ |
| 106 | #define DIAG_OFF_FLEX |
| 107 | #define DIAG_ON_FLEX |
| 108 | #endif |
| 109 | |
| 110 | #ifdef YYBYACC |
| 111 | /* |
| 112 | * Berkeley YACC. |
| 113 | * |
| 114 | * It generates a global declaration of yylval, or the appropriately |
| 115 | * prefixed version of yylval, in grammar.h, *even though it's been |
| 116 | * told to generate a pure parser, meaning it doesn't have any global |
| 117 | * variables*. Bison doesn't do this. |
| 118 | * |
| 119 | * That causes a warning due to the local declaration in the parser |
| 120 | * shadowing the global declaration. |
| 121 | * |
| 122 | * So, if the compiler warns about that, we turn off -Wshadow warnings. |
| 123 | * |
| 124 | * In addition, the generated code may have functions with unreachable |
| 125 | * code, so suppress warnings about those. |
| 126 | */ |
| 127 | #if defined(_MSC_VER) |
| 128 | /* |
| 129 | * This is Microsoft Visual Studio; we can use |
| 130 | * __pragma(warning(disable:XXXX)) and __pragma(warning(push/pop)). |
| 131 | */ |
| 132 | #define DIAG_OFF_BISON_BYACC \ |
| 133 | __pragma(warning(push)) \ |
| 134 | __pragma(warning(disable:4702)) |
| 135 | #define DIAG_ON_BISON_BYACC __pragma(warning(pop)) |
| 136 | #elif PCAP_IS_AT_LEAST_CLANG_VERSION(2,8) |
| 137 | /* |
| 138 | * This is Clang 2.8 or later; we can use "clang diagnostic |
| 139 | * ignored -Wxxx" and "clang diagnostic push/pop". |
| 140 | */ |
| 141 | #define DIAG_OFF_BISON_BYACC \ |
| 142 | PCAP_DO_PRAGMA(clang diagnostic push) \ |
| 143 | PCAP_DO_PRAGMA(clang diagnostic ignored "-Wshadow") \ |
| 144 | PCAP_DO_PRAGMA(clang diagnostic ignored "-Wunreachable-code") |
| 145 | #define DIAG_ON_BISON_BYACC \ |
| 146 | PCAP_DO_PRAGMA(clang diagnostic pop) |
| 147 | #elif PCAP_IS_AT_LEAST_GNUC_VERSION(4,6) |
| 148 | /* |
| 149 | * This is GCC 4.6 or later, or a compiler claiming to be that. |
| 150 | * We can use "GCC diagnostic ignored -Wxxx" (introduced in 4.2) |
| 151 | * and "GCC diagnostic push/pop" (introduced in 4.6). |
| 152 | */ |
| 153 | #define DIAG_OFF_BISON_BYACC \ |
| 154 | PCAP_DO_PRAGMA(GCC diagnostic push) \ |
| 155 | PCAP_DO_PRAGMA(GCC diagnostic ignored "-Wshadow") \ |
| 156 | PCAP_DO_PRAGMA(GCC diagnostic ignored "-Wunreachable-code") |
| 157 | #define DIAG_ON_BISON_BYACC \ |
| 158 | PCAP_DO_PRAGMA(GCC diagnostic pop) |
| 159 | #else |
| 160 | /* |
| 161 | * Neither Clang 2.8 or later nor GCC 4.6 or later or a compiler |
| 162 | * claiming to be that; there's nothing we know of that we can do. |
| 163 | */ |
| 164 | #define DIAG_OFF_BISON_BYACC |
| 165 | #define DIAG_ON_BISON_BYACC |
| 166 | #endif |
| 167 | #else |
| 168 | /* |
| 169 | * Bison. |
| 170 | * |
| 171 | * The generated code may have functions with unreachable code, so |
| 172 | * suppress warnings about those. |
| 173 | */ |
| 174 | #if defined(_MSC_VER) |
| 175 | /* |
| 176 | * This is Microsoft Visual Studio; we can use |
| 177 | * __pragma(warning(disable:XXXX)) and __pragma(warning(push/pop)). |
| 178 | * |
| 179 | * Suppress some /Wall warnings. |
| 180 | */ |
| 181 | #define DIAG_OFF_BISON_BYACC \ |
| 182 | __pragma(warning(push)) \ |
| 183 | __pragma(warning(disable:4127)) \ |
| 184 | __pragma(warning(disable:4242)) \ |
| 185 | __pragma(warning(disable:4244)) \ |
| 186 | __pragma(warning(disable:4702)) |
| 187 | #define DIAG_ON_BISON_BYACC __pragma(warning(pop)) |
| 188 | #elif PCAP_IS_AT_LEAST_CLANG_VERSION(2,8) |
| 189 | /* |
| 190 | * This is Clang 2.8 or later; we can use "clang diagnostic |
| 191 | * ignored -Wxxx" and "clang diagnostic push/pop". |
| 192 | */ |
| 193 | #define DIAG_OFF_BISON_BYACC \ |
| 194 | PCAP_DO_PRAGMA(clang diagnostic push) \ |
| 195 | PCAP_DO_PRAGMA(clang diagnostic ignored "-Wunreachable-code") |
| 196 | #define DIAG_ON_BISON_BYACC \ |
| 197 | PCAP_DO_PRAGMA(clang diagnostic pop) |
| 198 | #elif PCAP_IS_AT_LEAST_GNUC_VERSION(4,6) |
| 199 | /* |
| 200 | * This is GCC 4.6 or later, or a compiler claiming to be that. |
| 201 | * We can use "GCC diagnostic ignored -Wxxx" (introduced in 4.2) |
| 202 | * and "GCC diagnostic push/pop" (introduced in 4.6). |
| 203 | */ |
| 204 | #define DIAG_OFF_BISON_BYACC \ |
| 205 | PCAP_DO_PRAGMA(GCC diagnostic push) \ |
| 206 | PCAP_DO_PRAGMA(GCC diagnostic ignored "-Wunreachable-code") |
| 207 | #define DIAG_ON_BISON_BYACC \ |
| 208 | PCAP_DO_PRAGMA(GCC diagnostic pop) |
| 209 | #else |
| 210 | /* |
| 211 | * Neither Clang 2.8 or later nor GCC 4.6 or later or a compiler |
| 212 | * claiming to be that; there's nothing we know of that we can do. |
| 213 | */ |
| 214 | #define DIAG_OFF_BISON_BYACC |
| 215 | #define DIAG_ON_BISON_BYACC |
| 216 | #endif |
| 217 | #endif |
| 218 | |
| 219 | #endif /* _diag_control_h */ |