LXR linux/include/acpi/platform/acgcc.h

   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
  19typedef __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#ifdef __KERNEL__
  26#include <linux/stdarg.h>
  27#else
  28/* Used to build acpi tools */
  29#include <stdarg.h>
  30#endif /* __KERNEL__ */
  31#endif /* ACPI_USE_BUILTIN_STDARG */
  32#endif /* ! va_arg */
  33
  34#define ACPI_INLINE             __inline__
  35
  36/* Function name is used for debug output. Non-ANSI, compiler-dependent */
  37
  38#define ACPI_GET_FUNCTION_NAME          __func__
  39
  40/*
  41 * This macro is used to tag functions as "printf-like" because
  42 * some compilers (like GCC) can catch printf format string problems.
  43 */
  44#define ACPI_PRINTF_LIKE(c) __attribute__ ((__format__ (__printf__, c, c+1)))
  45
  46/*
  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
  50 * is unused.
  51 */
  52#define ACPI_UNUSED_VAR __attribute__ ((unused))
  53
  54/* GCC supports __VA_ARGS__ in macros */
  55
  56#define COMPILER_VA_MACRO               1
  57
  58/* GCC supports native multiply/shift on 32-bit platforms */
  59
  60#define ACPI_USE_NATIVE_MATH64
  61
  62/* GCC did not support __has_attribute until 5.1. */
  63
  64#ifndef __has_attribute
  65#define __has_attribute(x) 0
  66#endif
  67
  68/*
  69 * Explicitly mark intentional explicit fallthrough to silence
  70 * -Wimplicit-fallthrough in GCC 7.1+.
  71 */
  72
  73#if __has_attribute(__fallthrough__)
  74#define ACPI_FALLTHROUGH __attribute__((__fallthrough__))
  75#endif
  76
  77#endif                          /* __ACGCC_H__ */
  78