1 /* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */
2 /******************************************************************************
4 * Name: acgcc.h - GCC specific defines, etc.
6 * Copyright (C) 2000 - 2023, Intel Corp.
8 *****************************************************************************/
15 #include <linux/stdarg.h>
18 #endif /* __KERNEL__ */
21 #define ACPI_INLINE __inline__
23 /* Function name is used for debug output. Non-ANSI, compiler-dependent */
25 #define ACPI_GET_FUNCTION_NAME __func__
28 * This macro is used to tag functions as "printf-like" because
29 * some compilers (like GCC) can catch printf format string problems.
31 #define ACPI_PRINTF_LIKE(c) __attribute__ ((__format__ (__printf__, c, c+1)))
34 * Some compilers complain about unused variables. Sometimes we don't want to
35 * use all the variables (for example, _acpi_module_name). This allows us
36 * to tell the compiler warning in a per-variable manner that a variable
39 #define ACPI_UNUSED_VAR __attribute__ ((unused))
41 /* GCC supports __VA_ARGS__ in macros */
43 #define COMPILER_VA_MACRO 1
45 /* GCC supports native multiply/shift on 32-bit platforms */
47 #define ACPI_USE_NATIVE_MATH64
49 /* GCC did not support __has_attribute until 5.1. */
51 #ifndef __has_attribute
52 #define __has_attribute(x) 0
56 * Explicitly mark intentional explicit fallthrough to silence
57 * -Wimplicit-fallthrough in GCC 7.1+.
60 #if __has_attribute(__fallthrough__)
61 #define ACPI_FALLTHROUGH __attribute__((__fallthrough__))
65 * Flexible array members are not allowed to be part of a union under
66 * C99, but this is not for any technical reason. Work around the
69 #define ACPI_FLEX_ARRAY(TYPE, NAME) \
71 struct { } __Empty_ ## NAME; \
75 #endif /* __ACGCC_H__ */