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 - 2021, Intel Corp. 7 * 8 *****************************************************************************/ 9 10 #ifndef __ACGCC_H__ 11 #define __ACGCC_H__ 12 13 /* 14 * Use compiler specific <stdarg.h> is a good practice for even when 15 * -nostdinc is specified (i.e., ACPI_USE_STANDARD_HEADERS undefined. 16 */ 17 #ifndef va_arg 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) 24 #else 25 #include <linux/stdarg.h> 26 #endif 27 #endif 28 29 #define ACPI_INLINE __inline__ 30 31 /* Function name is used for debug output. Non-ANSI, compiler-dependent */ 32 33 #define ACPI_GET_FUNCTION_NAME __func__ 34 35 /* 36 * This macro is used to tag functions as "printf-like" because 37 * some compilers (like GCC) can catch printf format string problems. 38 */ 39 #define ACPI_PRINTF_LIKE(c) __attribute__ ((__format__ (__printf__, c, c+1))) 40 41 /* 42 * Some compilers complain about unused variables. Sometimes we don't want to 43 * use all the variables (for example, _acpi_module_name). This allows us 44 * to tell the compiler warning in a per-variable manner that a variable 45 * is unused. 46 */ 47 #define ACPI_UNUSED_VAR __attribute__ ((unused)) 48 49 /* GCC supports __VA_ARGS__ in macros */ 50 51 #define COMPILER_VA_MACRO 1 52 53 /* GCC supports native multiply/shift on 32-bit platforms */ 54 55 #define ACPI_USE_NATIVE_MATH64 56 57 /* GCC did not support __has_attribute until 5.1. */ 58 59 #ifndef __has_attribute 60 #define __has_attribute(x) 0 61 #endif 62 63 /* 64 * Explicitly mark intentional explicit fallthrough to silence 65 * -Wimplicit-fallthrough in GCC 7.1+. 66 */ 67 68 #if __has_attribute(__fallthrough__) 69 #define ACPI_FALLTHROUGH __attribute__((__fallthrough__)) 70 #endif 71 72 #endif /* __ACGCC_H__ */ 73