include/acpi/platform/acgcc.h

   1 /******************************************************************************
   2  *
   3  * Name: acgcc.h - GCC specific defines, etc.
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2018, Intel Corp.
   9  * All rights reserved.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions, and the following disclaimer,
  16  *    without modification.
  17  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
  18  *    substantially similar to the "NO WARRANTY" disclaimer below
  19  *    ("Disclaimer") and any redistribution must be conditioned upon
  20  *    including a substantially similar Disclaimer requirement for further
  21  *    binary redistribution.
  22  * 3. Neither the names of the above-listed copyright holders nor the names
  23  *    of any contributors may be used to endorse or promote products derived
  24  *    from this software without specific prior written permission.
  25  *
  26  * Alternatively, this software may be distributed under the terms of the
  27  * GNU General Public License ("GPL") version 2 as published by the Free
  28  * Software Foundation.
  29  *
  30  * NO WARRANTY
  31  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  32  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  33  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
  34  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  35  * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  36  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  37  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  38  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  39  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  40  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  41  * POSSIBILITY OF SUCH DAMAGES.
  42  */
  43
  44 #ifndef __ACGCC_H__
  45 #define __ACGCC_H__
  46
  47 /*
  48  * Use compiler specific <stdarg.h> is a good practice for even when
  49  * -nostdinc is specified (i.e., ACPI_USE_STANDARD_HEADERS undefined.
  50  */
  51 #ifndef va_arg
  52 #ifdef ACPI_USE_BUILTIN_STDARG
  53 typedef __builtin_va_list va_list;
  54 #define va_start(v, l)          __builtin_va_start(v, l)
  55 #define va_end(v)               __builtin_va_end(v)
  56 #define va_arg(v, l)            __builtin_va_arg(v, l)
  57 #define va_copy(d, s)           __builtin_va_copy(d, s)
  58 #else
  59 #include <stdarg.h>
  60 #endif
  61 #endif
  62
  63 #define ACPI_INLINE             __inline__
  64
  65 /* Function name is used for debug output. Non-ANSI, compiler-dependent */
  66
  67 #define ACPI_GET_FUNCTION_NAME          __func__
  68
  69 /*
  70  * This macro is used to tag functions as "printf-like" because
  71  * some compilers (like GCC) can catch printf format string problems.
  72  */
  73 #define ACPI_PRINTF_LIKE(c) __attribute__ ((__format__ (__printf__, c, c+1)))
  74
  75 /*
  76  * Some compilers complain about unused variables. Sometimes we don't want to
  77  * use all the variables (for example, _acpi_module_name). This allows us
  78  * to tell the compiler warning in a per-variable manner that a variable
  79  * is unused.
  80  */
  81 #define ACPI_UNUSED_VAR __attribute__ ((unused))
  82
  83 /* GCC supports __VA_ARGS__ in macros */
  84
  85 #define COMPILER_VA_MACRO               1
  86
  87 /* GCC supports native multiply/shift on 32-bit platforms */
  88
  89 #define ACPI_USE_NATIVE_MATH64
  90
  91 #endif                          /* __ACGCC_H__ */