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/*
* Copyright (c) 2015 Dmitry V. Levin <ldv@altlinux.org>
* Copyright (c) 2015-2020 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#ifndef STRACE_GCC_COMPAT_H
# define STRACE_GCC_COMPAT_H
# if defined __GNUC__ && defined __GNUC_MINOR__
# define GNUC_PREREQ(maj, min) \
((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
# else
# define GNUC_PREREQ(maj, min) 0
# endif
# if defined __clang__ && defined __clang_major__ && defined __clang_minor__
# define CLANG_PREREQ(maj, min) \
((__clang_major__ << 16) + __clang_minor__ >= ((maj) << 16) + (min))
# else
# define CLANG_PREREQ(maj, min) 0
# endif
# ifdef __GLIBC__
# ifdef __GLIBC_MINOR__
# define GLIBC_PREREQ_GE(maj, min) \
((__GLIBC__ << 16) + __GLIBC_MINOR__ >= ((maj) << 16) + (min))
# define GLIBC_PREREQ_LT(maj, min) \
((__GLIBC__ << 16) + __GLIBC_MINOR__ < ((maj) << 16) + (min))
# else /* !__GLIBC_MINOR__ */
# define GLIBC_PREREQ_GE(maj, min) 0
# define GLIBC_PREREQ_LT(maj, min) 1
# endif
# else /* !__GLIBC__ */
# define GLIBC_PREREQ_GE(maj, min) 0
# define GLIBC_PREREQ_LT(maj, min) 0
# endif
# if !(GNUC_PREREQ(2, 0) || CLANG_PREREQ(1, 0))
# define __attribute__(x) /* empty */
# endif
# if GNUC_PREREQ(2, 5)
# define ATTRIBUTE_NORETURN __attribute__((__noreturn__))
# else
# define ATTRIBUTE_NORETURN /* empty */
# endif
# if GNUC_PREREQ(2, 7)
# define ATTRIBUTE_FORMAT(args) __attribute__((__format__ args))
# define ATTRIBUTE_ALIGNED(arg) __attribute__((__aligned__(arg)))
# define ATTRIBUTE_PACKED __attribute__((__packed__))
# else
# define ATTRIBUTE_FORMAT(args) /* empty */
# define ATTRIBUTE_ALIGNED(arg) /* empty */
# define ATTRIBUTE_PACKED /* empty */
# endif
# if GNUC_PREREQ(3, 0)
# define SAME_TYPE(x, y) __builtin_types_compatible_p(typeof(x), typeof(y))
# define FAIL_BUILD_ON_ZERO(expr) (sizeof(int[-1 + 2 * !!(expr)]) * 0)
/* &(a)[0] is a pointer and not an array, shouldn't be treated as the same */
# define MUST_BE_ARRAY(a) FAIL_BUILD_ON_ZERO(!SAME_TYPE((a), &(a)[0]))
# else
# define SAME_TYPE(x, y) 0
# define FAIL_BUILD_ON_ZERO(e) 0
# define MUST_BE_ARRAY(a) 0
# endif
# if GNUC_PREREQ(3, 0)
# define ATTRIBUTE_MALLOC __attribute__((__malloc__))
# else
# define ATTRIBUTE_MALLOC /* empty */
# endif
# if GNUC_PREREQ(3, 1)
# define ATTRIBUTE_NOINLINE __attribute__((__noinline__))
# else
# define ATTRIBUTE_NOINLINE /* empty */
# endif
# if GNUC_PREREQ(4, 0)
# define ATTRIBUTE_SENTINEL __attribute__((__sentinel__))
# else
# define ATTRIBUTE_SENTINEL /* empty */
# endif
# if GNUC_PREREQ(4, 1)
# define ALIGNOF(t_) __alignof__(t_)
# else
# define ALIGNOF(t_) (sizeof(struct { char x_; t_ y_; }) - sizeof(t_))
# endif
# if GNUC_PREREQ(4, 3)
# define ATTRIBUTE_ALLOC_SIZE(args) __attribute__((__alloc_size__ args))
# else
# define ATTRIBUTE_ALLOC_SIZE(args) /* empty */
# endif
# if GNUC_PREREQ(7, 0)
# define ATTRIBUTE_FALLTHROUGH __attribute__((__fallthrough__))
# else
# define ATTRIBUTE_FALLTHROUGH ((void) 0)
# endif
# if CLANG_PREREQ(2, 8)
# define DIAG_PUSH_IGNORE_OVERRIDE_INIT \
_Pragma("clang diagnostic push"); \
_Pragma("clang diagnostic ignored \"-Winitializer-overrides\"");
# define DIAG_POP_IGNORE_OVERRIDE_INIT \
_Pragma("clang diagnostic pop");
# elif GNUC_PREREQ(4, 2)
# define DIAG_PUSH_IGNORE_OVERRIDE_INIT \
_Pragma("GCC diagnostic push"); \
_Pragma("GCC diagnostic ignored \"-Woverride-init\"");
# define DIAG_POP_IGNORE_OVERRIDE_INIT \
_Pragma("GCC diagnostic pop");
# else
# define DIAG_PUSH_IGNORE_OVERRIDE_INIT /* empty */
# define DIAG_POP_IGNORE_OVERRIDE_INIT /* empty */
# endif
# if GNUC_PREREQ(6, 0)
# define DIAG_PUSH_IGNORE_TAUTOLOGICAL_COMPARE \
_Pragma("GCC diagnostic push"); \
_Pragma("GCC diagnostic ignored \"-Wtautological-compare\"");
# define DIAG_POP_IGNORE_TAUTOLOGICAL_COMPARE \
_Pragma("GCC diagnostic pop");
# else
# define DIAG_PUSH_IGNORE_TAUTOLOGICAL_COMPARE /* empty */
# define DIAG_POP_IGNORE_TAUTOLOGICAL_COMPARE /* empty */
# endif
#endif /* !STRACE_GCC_COMPAT_H */
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