blob: 3b7d5bfefcf27252f36928ce9cdf1fc70c38e52a [file] [log] [blame]
/*
* Copyright (c) 2010-2014, Wind River Systems, Inc.
*
* SPDX-License-Identifier: Apache-2.0
*/
/**
* @file
* @brief Macros to abstract toolchain specific capabilities
*
* This file contains various macros to abstract compiler capabilities that
* utilize toolchain specific attributes and/or pragmas.
*/
#ifndef ZEPHYR_INCLUDE_TOOLCHAIN_H_
#define ZEPHYR_INCLUDE_TOOLCHAIN_H_
/**
* @def HAS_BUILTIN(x)
* @brief Check if the compiler supports the built-in function \a x.
*
* This macro is for use with conditional compilation to enable code using a
* builtin function that may not be available in every compiler.
*/
#ifdef __has_builtin
#define HAS_BUILTIN(x) __has_builtin(x)
#else
/*
* The compiler doesn't provide the __has_builtin() macro, so instead we depend
* on the toolchain-specific headers to define HAS_BUILTIN_x for the builtins
* supported.
*/
#define HAS_BUILTIN(x) HAS_BUILTIN_##x
#endif
#if defined(__XCC__)
#include <toolchain/xcc.h>
#elif defined(__GNUC__) || (defined(_LINKER) && defined(__GCC_LINKER_CMD__))
#include <toolchain/gcc.h>
#else
/* This include line exists for off-tree definitions of compilers,
* and therefore this header is not meant to exist in-tree
*/
#include <toolchain/other.h>
#endif
/*
* Ensure that __BYTE_ORDER__ and related preprocessor definitions are defined,
* as these are often used without checking for definition and doing so can
* cause unexpected behaviours.
*/
#ifndef _LINKER
#if !defined(__BYTE_ORDER__) || !defined(__ORDER_BIG_ENDIAN__) || \
!defined(__ORDER_LITTLE_ENDIAN__)
#error "__BYTE_ORDER__ is not defined"
#endif
#endif /* !_LINKER */
#endif /* ZEPHYR_INCLUDE_TOOLCHAIN_H_ */