141 lines
4.7 KiB
C
141 lines
4.7 KiB
C
/*
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* Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org>
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* Copyright (c) 2015-2018 The strace developers.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef STRACE_GCC_COMPAT_H
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#define STRACE_GCC_COMPAT_H
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#if defined __GNUC__ && defined __GNUC_MINOR__
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# define GNUC_PREREQ(maj, min) \
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((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
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#else
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# define GNUC_PREREQ(maj, min) 0
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#endif
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#if defined __clang__ && defined __clang_major__ && defined __clang_minor__
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# define CLANG_PREREQ(maj, min) \
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((__clang_major__ << 16) + __clang_minor__ >= ((maj) << 16) + (min))
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#else
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# define CLANG_PREREQ(maj, min) 0
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#endif
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#if !(GNUC_PREREQ(2, 0) || CLANG_PREREQ(1, 0))
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# define __attribute__(x) /* empty */
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#endif
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#if GNUC_PREREQ(2, 5)
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# define ATTRIBUTE_NORETURN __attribute__((__noreturn__))
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#else
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# define ATTRIBUTE_NORETURN /* empty */
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#endif
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#if GNUC_PREREQ(2, 7)
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# define ATTRIBUTE_FORMAT(args) __attribute__((__format__ args))
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# define ATTRIBUTE_ALIGNED(arg) __attribute__((__aligned__(arg)))
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# define ATTRIBUTE_PACKED __attribute__((__packed__))
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#else
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# define ATTRIBUTE_FORMAT(args) /* empty */
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# define ATTRIBUTE_ALIGNED(arg) /* empty */
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# define ATTRIBUTE_PACKED /* empty */
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#endif
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#if GNUC_PREREQ(3, 0)
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# define SAME_TYPE(x, y) __builtin_types_compatible_p(typeof(x), typeof(y))
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# define FAIL_BUILD_ON_ZERO(expr) (sizeof(int[-1 + 2 * !!(expr)]) * 0)
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/* &(a)[0] is a pointer and not an array, shouldn't be treated as the same */
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# define MUST_BE_ARRAY(a) FAIL_BUILD_ON_ZERO(!SAME_TYPE((a), &(a)[0]))
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#else
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# define SAME_TYPE(x, y) 0
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# define MUST_BE_ARRAY(a) 0
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#endif
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#if GNUC_PREREQ(3, 0)
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# define ATTRIBUTE_MALLOC __attribute__((__malloc__))
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#else
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# define ATTRIBUTE_MALLOC /* empty */
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#endif
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#if GNUC_PREREQ(3, 1)
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# define ATTRIBUTE_NOINLINE __attribute__((__noinline__))
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#else
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# define ATTRIBUTE_NOINLINE /* empty */
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#endif
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#if GNUC_PREREQ(4, 0)
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# define ATTRIBUTE_SENTINEL __attribute__((__sentinel__))
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#else
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# define ATTRIBUTE_SENTINEL /* empty */
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#endif
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#if GNUC_PREREQ(4, 1)
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# define ALIGNOF(t_) __alignof__(t_)
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#else
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# define ALIGNOF(t_) (sizeof(struct { char x_; t_ y_; }) - sizeof(t_))
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#endif
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#if GNUC_PREREQ(4, 3)
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# define ATTRIBUTE_ALLOC_SIZE(args) __attribute__((__alloc_size__ args))
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#else
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# define ATTRIBUTE_ALLOC_SIZE(args) /* empty */
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#endif
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#if GNUC_PREREQ(7, 0)
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# define ATTRIBUTE_FALLTHROUGH __attribute__((__fallthrough__))
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#else
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# define ATTRIBUTE_FALLTHROUGH ((void) 0)
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#endif
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#if CLANG_PREREQ(2, 8)
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# define DIAG_PUSH_IGNORE_OVERRIDE_INIT \
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_Pragma("clang diagnostic push"); \
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_Pragma("clang diagnostic ignored \"-Winitializer-overrides\"");
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# define DIAG_POP_IGNORE_OVERRIDE_INIT \
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_Pragma("clang diagnostic pop");
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#elif GNUC_PREREQ(4, 2)
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# define DIAG_PUSH_IGNORE_OVERRIDE_INIT \
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_Pragma("GCC diagnostic push"); \
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_Pragma("GCC diagnostic ignored \"-Woverride-init\"");
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# define DIAG_POP_IGNORE_OVERRIDE_INIT \
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_Pragma("GCC diagnostic pop");
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#else
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# define DIAG_PUSH_IGNORE_OVERRIDE_INIT /* empty */
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# define DIAG_POP_IGNORE_OVERRIDE_INIT /* empty */
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#endif
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#if GNUC_PREREQ(6, 0)
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# define DIAG_PUSH_IGNORE_TAUTOLOGICAL_COMPARE \
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_Pragma("GCC diagnostic push"); \
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_Pragma("GCC diagnostic ignored \"-Wtautological-compare\"");
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# define DIAG_POP_IGNORE_TAUTOLOGICAL_COMPARE \
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_Pragma("GCC diagnostic pop");
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#else
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# define DIAG_PUSH_IGNORE_TAUTOLOGICAL_COMPARE /* empty */
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# define DIAG_POP_IGNORE_TAUTOLOGICAL_COMPARE /* empty */
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#endif
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#endif /* !STRACE_GCC_COMPAT_H */
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