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#include <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