| 1 | /* SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 */ |
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| 2 | /****************************************************************************** |
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| 3 | * |
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| 4 | * Name: acgcc.h - GCC specific defines, etc. |
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| 5 | * |
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| 6 | * Copyright (C) 2000 - 2023, Intel Corp. |
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| 7 | * |
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| 8 | *****************************************************************************/ |
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| 9 | |
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| 10 | #ifndef __ACGCC_H__ |
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| 11 | #define __ACGCC_H__ |
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| 12 | |
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| 13 | #ifndef va_arg |
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| 14 | #ifdef __KERNEL__ |
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| 15 | #include <linux/stdarg.h> |
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| 16 | #else |
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| 17 | #include <stdarg.h> |
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| 18 | #endif /* __KERNEL__ */ |
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| 19 | #endif /* ! va_arg */ |
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| 20 | |
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| 21 | #define ACPI_INLINE __inline__ |
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| 22 | |
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| 23 | /* Function name is used for debug output. Non-ANSI, compiler-dependent */ |
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| 24 | |
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| 25 | #define ACPI_GET_FUNCTION_NAME __func__ |
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| 26 | |
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| 27 | /* |
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| 28 | * This macro is used to tag functions as "printf-like" because |
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| 29 | * some compilers (like GCC) can catch printf format string problems. |
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| 30 | */ |
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| 31 | #define ACPI_PRINTF_LIKE(c) __attribute__ ((__format__ (__printf__, c, c+1))) |
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| 32 | |
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| 33 | /* |
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| 34 | * Some compilers complain about unused variables. Sometimes we don't want to |
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| 35 | * use all the variables (for example, _acpi_module_name). This allows us |
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| 36 | * to tell the compiler warning in a per-variable manner that a variable |
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| 37 | * is unused. |
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| 38 | */ |
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| 39 | #define ACPI_UNUSED_VAR __attribute__ ((unused)) |
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| 40 | |
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| 41 | /* GCC supports __VA_ARGS__ in macros */ |
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| 42 | |
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| 43 | #define COMPILER_VA_MACRO 1 |
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| 44 | |
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| 45 | /* GCC supports native multiply/shift on 32-bit platforms */ |
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| 46 | |
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| 47 | #define ACPI_USE_NATIVE_MATH64 |
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| 48 | |
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| 49 | /* GCC did not support __has_attribute until 5.1. */ |
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| 50 | |
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| 51 | #ifndef __has_attribute |
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| 52 | #define __has_attribute(x) 0 |
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| 53 | #endif |
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| 54 | |
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| 55 | /* |
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| 56 | * Explicitly mark intentional explicit fallthrough to silence |
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| 57 | * -Wimplicit-fallthrough in GCC 7.1+. |
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| 58 | */ |
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| 59 | |
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| 60 | #if __has_attribute(__fallthrough__) |
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| 61 | #define ACPI_FALLTHROUGH __attribute__((__fallthrough__)) |
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| 62 | #endif |
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| 63 | |
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| 64 | /* |
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| 65 | * Flexible array members are not allowed to be part of a union under |
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| 66 | * C99, but this is not for any technical reason. Work around the |
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| 67 | * limitation. |
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| 68 | */ |
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| 69 | #define ACPI_FLEX_ARRAY(TYPE, NAME) \ |
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| 70 | struct { \ |
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| 71 | struct { } __Empty_ ## NAME; \ |
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| 72 | TYPE NAME[]; \ |
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| 73 | } |
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| 74 | |
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| 75 | #endif /* __ACGCC_H__ */ |
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| 76 | |
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