1 /* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */ 2 /****************************************************************************** 3 * 4 * Name: acgcc.h - GCC specific defines, etc. 5 * 6 * Copyright (C) 2000 - 2023, Intel Corp. 7 * 8 *****************************************************************************/ 9 10 #ifndef __ACGCC_H__ 11 #define __ACGCC_H__ 12 13 #ifndef va_arg 14 #ifdef __KERNEL__ 15 #include <linux/stdarg.h> 16 #else 17 #include <stdarg.h> 18 #endif /* __KERNEL__ */ 19 #endif /* ! va_arg */ 20 21 #define ACPI_INLINE __inline__ 22 23 /* Function name is used for debug output. Non-ANSI, compiler-dependent */ 24 25 #define ACPI_GET_FUNCTION_NAME __func__ 26 27 /* 28 * This macro is used to tag functions as "printf-like" because 29 * some compilers (like GCC) can catch printf format string problems. 30 */ 31 #define ACPI_PRINTF_LIKE(c) __attribute__ ((__format__ (__printf__, c, c+1))) 32 33 /* 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 37 * is unused. 38 */ 39 #define ACPI_UNUSED_VAR __attribute__ ((unused)) 40 41 /* GCC supports __VA_ARGS__ in macros */ 42 43 #define COMPILER_VA_MACRO 1 44 45 /* GCC supports native multiply/shift on 32-bit platforms */ 46 47 #define ACPI_USE_NATIVE_MATH64 48 49 /* GCC did not support __has_attribute until 5.1. */ 50 51 #ifndef __has_attribute 52 #define __has_attribute(x) 0 53 #endif 54 55 /* 56 * Explicitly mark intentional explicit fallthrough to silence 57 * -Wimplicit-fallthrough in GCC 7.1+. 58 */ 59 60 #if __has_attribute(__fallthrough__) 61 #define ACPI_FALLTHROUGH __attribute__((__fallthrough__)) 62 #endif 63 64 /* 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 67 * limitation. 68 */ 69 #define ACPI_FLEX_ARRAY(TYPE, NAME) \ 70 struct { \ 71 struct { } __Empty_ ## NAME; \ 72 TYPE NAME[]; \ 73 } 74 75 #endif /* __ACGCC_H__ */ 76