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 * XL C 12.1 and 13.1 for AIX require no attention in this department. 52 * XL C 16.1 defines both __GNUC__ and __clang__, so has to be tested first. 53 */ 54#if ND_IS_AT_LEAST_XL_C_VERSION(16,1) 55 /* 56 * See respective Clang note below. 57 */ 58 #define DIAG_OFF_ASSIGN_ENUM \ 59 DIAG_DO_PRAGMA(clang diagnostic push) \ 60 DIAG_DO_PRAGMA(clang diagnostic ignored "-Wassign-enum") 61 #define DIAG_ON_ASSIGN_ENUM \ 62 DIAG_DO_PRAGMA(clang diagnostic pop) 63 64 #define DIAG_OFF_CAST_QUAL 65 #define DIAG_ON_CAST_QUAL 66 #define DIAG_OFF_DEPRECATION 67 #define DIAG_ON_DEPRECATION 68/* 69 * The current clang compilers also define __GNUC__ and __GNUC_MINOR__ 70 * thus we need to test the clang case before the GCC one 71 */ 72#elif ND_IS_AT_LEAST_CLANG_VERSION(2,8) 73 /* 74 * Clang complains if you OR together multiple enum values of a 75 * given enum type and them pass it as an argument of that enum 76 * type. Some libcap-ng routines use enums to define bit flags; 77 * we want to squelch the warnings that produces. 78 */ 79 #define DIAG_OFF_ASSIGN_ENUM \ 80 DIAG_DO_PRAGMA(clang diagnostic push) \ 81 DIAG_DO_PRAGMA(clang diagnostic ignored "-Wassign-enum") 82 #define DIAG_ON_ASSIGN_ENUM \ 83 DIAG_DO_PRAGMA(clang diagnostic pop) 84 85 /* 86 * It also legitimately complains about some code in the BSD 87 * getopt_long() - that code explicitly and deliberately 88 * violates the contract by permuting the argument vector 89 * (declared as char const *argv[], meaning "I won't change 90 * the vector by changing any of its elements), as do the 91 * GNU and Solaris getopt_long(). This is documented in the 92 * man pages for all versions; it can be suppressed by setting 93 * the environment variable POSIXLY_CORRECT or by putting a "+" 94 * at the beginning of the option string. 95 * 96 * We suppress the warning. 97 */ 98 #define DIAG_OFF_CAST_QUAL \ 99 DIAG_DO_PRAGMA(clang diagnostic push) \ 100 DIAG_DO_PRAGMA(clang diagnostic ignored "-Wcast-qual") 101 #define DIAG_ON_CAST_QUAL \ 102 DIAG_DO_PRAGMA(clang diagnostic pop) 103 104 /* 105 * Suppress deprecation warnings. 106 */ 107 #define DIAG_OFF_DEPRECATION \ 108 DIAG_DO_PRAGMA(clang diagnostic push) \ 109 DIAG_DO_PRAGMA(clang diagnostic ignored "-Wdeprecated-declarations") 110 #define DIAG_ON_DEPRECATION \ 111 DIAG_DO_PRAGMA(clang diagnostic pop) 112 113 /* 114 * Clang supports the generic C11 extension even if run with the -std=gnu99 115 * flag, which leads FreeBSD <sys/cdefs.h> to use the extension, which 116 * results in Clang emitting a -Wc11-extensions warning. The warning is not 117 * documented in the user manual, but it happens with Clang 10.0.1 on 118 * FreeBSD 12.2, so let's use that as a reference. 119 */ 120 #if ND_IS_AT_LEAST_CLANG_VERSION(10,0) 121 #define DIAG_OFF_C11_EXTENSIONS \ 122 DIAG_DO_PRAGMA(clang diagnostic push) \ 123 DIAG_DO_PRAGMA(clang diagnostic ignored "-Wc11-extensions") 124 #define DIAG_ON_C11_EXTENSIONS \ 125 DIAG_DO_PRAGMA(clang diagnostic pop) 126 #endif 127#elif ND_IS_AT_LEAST_GNUC_VERSION(4,2) 128 /* GCC apparently doesn't complain about ORing enums together. */ 129 #define DIAG_OFF_ASSIGN_ENUM 130 #define DIAG_ON_ASSIGN_ENUM 131 132 /* 133 * It does, however, complain about casting away constness in 134 * missing/getopt_long.c. 135 */ 136 #define DIAG_OFF_CAST_QUAL \ 137 DIAG_DO_PRAGMA(GCC diagnostic push) \ 138 DIAG_DO_PRAGMA(GCC diagnostic ignored "-Wcast-qual") 139 #define DIAG_ON_CAST_QUAL \ 140 DIAG_DO_PRAGMA(GCC diagnostic pop) 141 142 /* 143 * Suppress deprecation warnings. 144 */ 145 #define DIAG_OFF_DEPRECATION \ 146 DIAG_DO_PRAGMA(GCC diagnostic push) \ 147 DIAG_DO_PRAGMA(GCC diagnostic ignored "-Wdeprecated-declarations") 148 #define DIAG_ON_DEPRECATION \ 149 DIAG_DO_PRAGMA(GCC diagnostic pop) 150 /* 151 * GCC supports -Wc99-c11-compat since version 5.1.0, but the warning does 152 * not trigger for now, so let's just leave it be. 153 */ 154#else 155 #define DIAG_OFF_ASSIGN_ENUM 156 #define DIAG_ON_ASSIGN_ENUM 157 #define DIAG_OFF_CAST_QUAL 158 #define DIAG_ON_CAST_QUAL 159 #define DIAG_OFF_DEPRECATION 160 #define DIAG_ON_DEPRECATION 161#endif 162 163#ifndef DIAG_OFF_C11_EXTENSIONS 164#define DIAG_OFF_C11_EXTENSIONS 165#endif 166#ifndef DIAG_ON_C11_EXTENSIONS 167#define DIAG_ON_C11_EXTENSIONS 168#endif 169 170/* 171 * GCC needs this on AIX for longjmp(). 172 */ 173#if ND_IS_AT_LEAST_GNUC_VERSION(5,1) 174 /* 175 * Beware that the effect of this builtin is more than just squelching the 176 * warning! GCC trusts it enough for the process to segfault if the control 177 * flow reaches the builtin (an infinite empty loop in the same context would 178 * squelch the warning and ruin the process too, albeit in a different way). 179 * So please remember to use this very carefully. 180 */ 181 #define ND_UNREACHABLE __builtin_unreachable(); 182#else 183 #define ND_UNREACHABLE 184#endif 185 186#endif /* _diag_control_h */ 187