/* -*- 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 "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 DIAG_DO_PRAGMA(x) _Pragma (#x) #endif /* * XL C 12.1 and 13.1 for AIX require no attention in this department. * XL C 16.1 defines both __GNUC__ and __clang__, so has to be tested first. */ #if ND_IS_AT_LEAST_XL_C_VERSION(16,1) /* * See respective Clang note below. */ #define DIAG_OFF_ASSIGN_ENUM \ DIAG_DO_PRAGMA(clang diagnostic push) \ DIAG_DO_PRAGMA(clang diagnostic ignored "-Wassign-enum") #define DIAG_ON_ASSIGN_ENUM \ DIAG_DO_PRAGMA(clang diagnostic pop) /* * The current clang compilers also define __GNUC__ and __GNUC_MINOR__ * thus we need to test the clang case before the GCC one */ #elif ND_IS_AT_LEAST_CLANG_VERSION(2,8) /* * Clang complains if you OR together multiple enum values of a * given enum type and them pass it as an argument of that enum * type. Some libcap-ng routines use enums to define bit flags; * we want to squelch the warnings that produces. */ #define DIAG_OFF_ASSIGN_ENUM \ DIAG_DO_PRAGMA(clang diagnostic push) \ DIAG_DO_PRAGMA(clang diagnostic ignored "-Wassign-enum") #define DIAG_ON_ASSIGN_ENUM \ DIAG_DO_PRAGMA(clang diagnostic pop) /* * It also legitimately complains about some code in the BSD * getopt_long() - that code explicitly and deliberately * violates the contract by permuting the argument vector * (declared as char const *argv[], meaning "I won't change * the vector by changing any of its elements), as do the * GNU and Solaris getopt_long(). This is documented in the * man pages for all versions; it can be suppressed by setting * the environment variable POSIXLY_CORRECT or by putting a "+" * at the beginning of the option string. * * We suppress the warning. */ #define DIAG_OFF_CAST_QUAL \ DIAG_DO_PRAGMA(clang diagnostic push) \ DIAG_DO_PRAGMA(clang diagnostic ignored "-Wcast-qual") #define DIAG_ON_CAST_QUAL \ DIAG_DO_PRAGMA(clang diagnostic pop) /* * Suppress deprecation warnings. */ #define DIAG_OFF_DEPRECATION \ DIAG_DO_PRAGMA(clang diagnostic push) \ DIAG_DO_PRAGMA(clang diagnostic ignored "-Wdeprecated-declarations") #define DIAG_ON_DEPRECATION \ DIAG_DO_PRAGMA(clang diagnostic pop) /* * Clang supports the generic C11 extension even if run with the -std=gnu99 * flag, which leads FreeBSD to use the extension, which * results in Clang emitting a -Wc11-extensions warning. The warning is not * documented in the user manual, but it happens with Clang 10.0.1 on * FreeBSD 12.2, so let's use that as a reference. */ #if ND_IS_AT_LEAST_CLANG_VERSION(10,0) #define DIAG_OFF_C11_EXTENSIONS \ DIAG_DO_PRAGMA(clang diagnostic push) \ DIAG_DO_PRAGMA(clang diagnostic ignored "-Wc11-extensions") #define DIAG_ON_C11_EXTENSIONS \ DIAG_DO_PRAGMA(clang diagnostic pop) #endif /* * When Clang correctly detects an old-style function prototype after * preprocessing, the warning can be irrelevant to this source tree because * the prototype comes from a system header macro. */ #if ND_IS_AT_LEAST_CLANG_VERSION(5,0) #define DIAG_OFF_STRICT_PROTOTYPES \ DIAG_DO_PRAGMA(clang diagnostic push) \ DIAG_DO_PRAGMA(clang diagnostic ignored "-Wstrict-prototypes") #define DIAG_ON_STRICT_PROTOTYPES \ DIAG_DO_PRAGMA(clang diagnostic pop) #endif #elif ND_IS_AT_LEAST_GNUC_VERSION(4,2) /* GCC apparently doesn't complain about ORing enums together. */ /* * It does, however, complain about casting away constness in * missing/getopt_long.c. */ #define DIAG_OFF_CAST_QUAL \ DIAG_DO_PRAGMA(GCC diagnostic push) \ DIAG_DO_PRAGMA(GCC diagnostic ignored "-Wcast-qual") #define DIAG_ON_CAST_QUAL \ DIAG_DO_PRAGMA(GCC diagnostic pop) #if ND_IS_AT_LEAST_GNUC_VERSION(4,5) /* * GCC warns about unused return values if a function is marked as * "warn about ignoring this function's return value". * * Clang appears to let you ignore a result without a warning by * casting the function result to void, so we don't appear to * need this for Clang. */ #define DIAG_OFF_WARN_UNUSED_RESULT \ DIAG_DO_PRAGMA(GCC diagnostic push) \ DIAG_DO_PRAGMA(GCC diagnostic ignored "-Wunused-result") #define DIAG_ON_WARN_UNUSED_RESULT \ DIAG_DO_PRAGMA(GCC diagnostic pop) #endif /* * Suppress deprecation warnings. */ #define DIAG_OFF_DEPRECATION \ DIAG_DO_PRAGMA(GCC diagnostic push) \ DIAG_DO_PRAGMA(GCC diagnostic ignored "-Wdeprecated-declarations") #define DIAG_ON_DEPRECATION \ DIAG_DO_PRAGMA(GCC diagnostic pop) /* * GCC supports -Wc99-c11-compat since version 5.1.0, but the warning does * not trigger for now, so let's just leave it be. * * GCC does not currently generate any -Wstrict-prototypes warnings that * would need silencing as is done for Clang above. */ #endif /* * GCC needs this on AIX for longjmp(). */ #if ND_IS_AT_LEAST_GNUC_VERSION(5,1) /* * Beware that the effect of this builtin is more than just squelching the * warning! GCC trusts it enough for the process to segfault if the control * flow reaches the builtin (an infinite empty loop in the same context would * squelch the warning and ruin the process too, albeit in a different way). * So please remember to use this very carefully. */ #define ND_UNREACHABLE __builtin_unreachable(); #endif #ifndef DIAG_OFF_ASSIGN_ENUM #define DIAG_OFF_ASSIGN_ENUM #endif #ifndef DIAG_ON_ASSIGN_ENUM #define DIAG_ON_ASSIGN_ENUM #endif #ifndef DIAG_OFF_CAST_QUAL #define DIAG_OFF_CAST_QUAL #endif #ifndef DIAG_ON_CAST_QUAL #define DIAG_ON_CAST_QUAL #endif #ifndef DIAG_OFF_WARN_UNUSED_RESULT #define DIAG_OFF_WARN_UNUSED_RESULT #endif #ifndef DIAG_ON_WARN_UNUSED_RESULT #define DIAG_ON_WARN_UNUSED_RESULT #endif #ifndef DIAG_OFF_DEPRECATION #define DIAG_OFF_DEPRECATION #endif #ifndef DIAG_ON_DEPRECATION #define DIAG_ON_DEPRECATION #endif #ifndef DIAG_OFF_C11_EXTENSIONS #define DIAG_OFF_C11_EXTENSIONS #endif #ifndef DIAG_ON_C11_EXTENSIONS #define DIAG_ON_C11_EXTENSIONS #endif #ifndef DIAG_OFF_STRICT_PROTOTYPES #define DIAG_OFF_STRICT_PROTOTYPES #endif #ifndef DIAG_ON_STRICT_PROTOTYPES #define DIAG_ON_STRICT_PROTOTYPES #endif #ifndef ND_UNREACHABLE #define ND_UNREACHABLE #endif #endif /* _diag_control_h */