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Diffstat (limited to 'diag-control.h')
| -rw-r--r-- | diag-control.h | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/diag-control.h b/diag-control.h new file mode 100644 index 0000000..3eb6bca --- /dev/null +++ b/diag-control.h @@ -0,0 +1,186 @@ +/* -*- 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) + + #define DIAG_OFF_CAST_QUAL + #define DIAG_ON_CAST_QUAL + #define DIAG_OFF_DEPRECATION + #define DIAG_ON_DEPRECATION +/* + * 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 <sys/cdefs.h> 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 +#elif ND_IS_AT_LEAST_GNUC_VERSION(4,2) + /* GCC apparently doesn't complain about ORing enums together. */ + #define DIAG_OFF_ASSIGN_ENUM + #define DIAG_ON_ASSIGN_ENUM + + /* + * 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) + + /* + * 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. + */ +#else + #define DIAG_OFF_ASSIGN_ENUM + #define DIAG_ON_ASSIGN_ENUM + #define DIAG_OFF_CAST_QUAL + #define DIAG_ON_CAST_QUAL + #define DIAG_OFF_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 + +/* + * 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(); +#else + #define ND_UNREACHABLE +#endif + +#endif /* _diag_control_h */ |