MDK中armclang编译器

MDK以及DS5等工具中主推的编译器已经更换为armclang编译器。而原来的armcc编译器已经不再更新，只是提供一些更新，所以我就对armclang进行了一些测试。

测试的芯片是STM32，使用ST公司最新推出的Cube HAL库。直接新建一个工程之后，直接将编译器更改为armclang编译不通过。

错误一：提供找不到‘__weak’

解决方案："__weak"的定义是在stm32f1xx_hal_def.h文件中。其中有关于各种编译器的定义部分。理论上armclang应该是会定义__GNU__的，可能由于MDK的bug或是其它原因，这部分并没有定义，所以需要手动增加针对armclang编译器的定义。

修改后代码如下：

/**  ******************************************************************************  * @file    stm32f1xx_hal_def.h  * @author  MCD Application Team  * @version V1.1.1  * @date    12-May-2017  * @brief   This file contains HAL common defines, enumeration, macros and   *          structures definitions.   ******************************************************************************  * @attention  *  * <h2><center>&copy; COPYRIGHT(c) 2017 STMicroelectronics</center></h2>  *  * Redistribution and use in source and binary forms, with or without modification,  * are permitted provided that the following conditions are met:  *   1. Redistributions of source code must retain the above copyright notice,  *      this list of conditions and the following disclaimer.  *   2. Redistributions in binary form must reproduce the above copyright notice,  *      this list of conditions and the following disclaimer in the documentation  *      and/or other materials provided with the distribution.  *   3. Neither the name of STMicroelectronics nor the names of its contributors  *      may be used to endorse or promote products derived from this software  *      without specific prior written permission.  *  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.  *  ******************************************************************************  *//********************************************************************************* @author WangWei * @date  29-Sep-2017* @brief Add some code for CLANG *******************************************************************************//* Define to prevent recursive inclusion -------------------------------------*/#ifndef __STM32F1xx_HAL_DEF#define __STM32F1xx_HAL_DEF#ifdef __cplusplus extern "C" {#endif/* Includes ------------------------------------------------------------------*/#include "stm32f1xx.h"#if defined(USE_HAL_LEGACY)#include "Legacy/stm32_hal_legacy.h"#endif#include <stdio.h>/* Exported types ------------------------------------------------------------*//**   * @brief  HAL Status structures definition    */  typedef enum {  HAL_OK       = 0x00U,  HAL_ERROR    = 0x01U,  HAL_BUSY     = 0x02U,  HAL_TIMEOUT  = 0x03U} HAL_StatusTypeDef;/**   * @brief  HAL Lock structures definition    */typedef enum {  HAL_UNLOCKED = 0x00U,  HAL_LOCKED   = 0x01U  } HAL_LockTypeDef;/* Exported macro ------------------------------------------------------------*/#define HAL_MAX_DELAY      0xFFFFFFFFU#define HAL_IS_BIT_SET(REG, BIT)         (((REG) & (BIT)) != RESET)#define HAL_IS_BIT_CLR(REG, BIT)         (((REG) & (BIT)) == RESET)#define __HAL_LINKDMA(__HANDLE__, __PPP_DMA_FIELD__, __DMA_HANDLE__)               \                        do{                                                      \                              (__HANDLE__)->__PPP_DMA_FIELD__ = &(__DMA_HANDLE__); \                              (__DMA_HANDLE__).Parent = (__HANDLE__);             \                          } while(0U)#define UNUSED(x) ((void)(x))/** @brief Reset the Handle's State field.  * @param __HANDLE__: specifies the Peripheral Handle.  * @note  This macro can be used for the following purpose:   *          - When the Handle is declared as local variable; before passing it as parameter  *            to HAL_PPP_Init() for the first time, it is mandatory to use this macro   *            to set to 0 the Handle's "State" field.  *            Otherwise, "State" field may have any random value and the first time the function   *            HAL_PPP_Init() is called, the low level hardware initialization will be missed  *            (i.e. HAL_PPP_MspInit() will not be executed).  *          - When there is a need to reconfigure the low level hardware: instead of calling  *            HAL_PPP_DeInit() then HAL_PPP_Init(), user can make a call to this macro then HAL_PPP_Init().  *            In this later function, when the Handle's "State" field is set to 0, it will execute the function  *            HAL_PPP_MspInit() which will reconfigure the low level hardware.  * @retval None  */#define __HAL_RESET_HANDLE_STATE(__HANDLE__) ((__HANDLE__)->State = 0U)#if (USE_RTOS == 1U)  /* Reserved for future use */  #error "USE_RTOS should be 0 in the current HAL release"#else  #define __HAL_LOCK(__HANDLE__)                                           \                                do{                                        \                                    if((__HANDLE__)->Lock == HAL_LOCKED)   \                                    {                                      \                                       return HAL_BUSY;                    \                                    }                                      \                                    else                                   \                                    {                                      \                                       (__HANDLE__)->Lock = HAL_LOCKED;    \                                    }                                      \                                  }while (0U)  #define __HAL_UNLOCK(__HANDLE__)                                          \                                  do{                                       \                                      (__HANDLE__)->Lock = HAL_UNLOCKED;    \                                    }while (0U)#endif /* USE_RTOS */#if  defined ( __GNUC__ ) || defined ( __clang__ )  #ifndef __weak    #define __weak   __attribute__((weak))  #endif /* __weak */  #ifndef __packed    #define __packed __attribute__((__packed__))  #endif /* __packed */#endif /* __GNUC__ *//* Macro to get variable aligned on 4-bytes, for __ICCARM__ the directive "#pragma data_alignment=4" must be used instead */#if defined   (__GNUC__) || defined (__clang__)        /* GNU Compiler */  #ifndef __ALIGN_END    #define __ALIGN_END    __attribute__ ((aligned (4)))  #endif /* __ALIGN_END */  #ifndef __ALIGN_BEGIN      #define __ALIGN_BEGIN  #endif /* __ALIGN_BEGIN */#else  #ifndef __ALIGN_END    #define __ALIGN_END  #endif /* __ALIGN_END */  #ifndef __ALIGN_BEGIN          #if defined   (__CC_ARM)      /* ARM Compiler */      #define __ALIGN_BEGIN    __align(4)    #elif defined (__ICCARM__)    /* IAR Compiler */      #define __ALIGN_BEGIN     #endif /* __CC_ARM */  #endif /* __ALIGN_BEGIN */#endif /* __GNUC__ *//**   * @brief  __RAM_FUNC definition  */ #if defined ( __CC_ARM   )/* ARM Compiler   ------------   RAM functions are defined using the toolchain options.    Functions that are executed in RAM should reside in a separate source module.   Using the 'Options for File' dialog you can simply change the 'Code / Const'    area of a module to a memory space in physical RAM.   Available memory areas are declared in the 'Target' tab of the 'Options for Target'   dialog. */#define __RAM_FUNC HAL_StatusTypeDef #elif defined ( __ICCARM__ )/* ICCARM Compiler   ---------------   RAM functions are defined using a specific toolchain keyword "__ramfunc". */#define __RAM_FUNC __ramfunc HAL_StatusTypeDef#elif defined   (  __GNUC__  ) || defined ( __clang__ )/* GNU Compiler   ------------  RAM functions are defined using a specific toolchain attribute    "__attribute__((section(".RamFunc")))".*/#define __RAM_FUNC HAL_StatusTypeDef  __attribute__((section(".RamFunc")))#endif/**   * @brief  __NOINLINE definition  */ #if defined ( __CC_ARM   ) || defined   (  __GNUC__  ) || defined ( __clang__ )/* ARM & GNUCompiler    ---------------- */#define __NOINLINE __attribute__ ( (noinline) )#elif defined ( __ICCARM__ )/* ICCARM Compiler   ---------------*/#define __NOINLINE _Pragma("optimize = no_inline")#endif#ifdef __cplusplus}#endif#endif /* ___STM32F1xx_HAL_DEF *//************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

错误二：嵌入式汇编部分报错

这个是由于armclang嵌入汇编基本和GNU C类似，不同于armcc编译器，所以这部分需要修改。但是我觉得这是很好的地方，因为这样以后学习STM32的朋友可以更容易的学习linux。