1 /* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */
2 /******************************************************************************
4 * Name: acgcc.h - GCC specific defines, etc.
6 * Copyright (C) 2000 - 2021, Intel Corp.
8 *****************************************************************************/
14 * Use compiler specific <stdarg.h> is a good practice for even when
15 * -nostdinc is specified (i.e., ACPI_USE_STANDARD_HEADERS undefined.
18 #ifdef ACPI_USE_BUILTIN_STDARG
19 typedef __builtin_va_list va_list;
20 #define va_start(v, l) __builtin_va_start(v, l)
21 #define va_end(v) __builtin_va_end(v)
22 #define va_arg(v, l) __builtin_va_arg(v, l)
23 #define va_copy(d, s) __builtin_va_copy(d, s)
26 #include <linux/stdarg.h>
28 /* Used to build acpi tools */
30 #endif /* __KERNEL__ */
31 #endif /* ACPI_USE_BUILTIN_STDARG */
34 #define ACPI_INLINE __inline__
36 /* Function name is used for debug output. Non-ANSI, compiler-dependent */
38 #define ACPI_GET_FUNCTION_NAME __func__
41 * This macro is used to tag functions as "printf-like" because
42 * some compilers (like GCC) can catch printf format string problems.
44 #define ACPI_PRINTF_LIKE(c) __attribute__ ((__format__ (__printf__, c, c+1)))
47 * Some compilers complain about unused variables. Sometimes we don't want to
48 * use all the variables (for example, _acpi_module_name). This allows us
49 * to tell the compiler warning in a per-variable manner that a variable
52 #define ACPI_UNUSED_VAR __attribute__ ((unused))
54 /* GCC supports __VA_ARGS__ in macros */
56 #define COMPILER_VA_MACRO 1
58 /* GCC supports native multiply/shift on 32-bit platforms */
60 #define ACPI_USE_NATIVE_MATH64
62 /* GCC did not support __has_attribute until 5.1. */
64 #ifndef __has_attribute
65 #define __has_attribute(x) 0
69 * Explicitly mark intentional explicit fallthrough to silence
70 * -Wimplicit-fallthrough in GCC 7.1+.
73 #if __has_attribute(__fallthrough__)
74 #define ACPI_FALLTHROUGH __attribute__((__fallthrough__))
77 #endif /* __ACGCC_H__ */