Error reported by Huada MCU Keil_ Weak's solution

1. Keil Unrecognized compilation __WEAK The list of questions is as follows ：

In the use of Keil Sometimes unrecognized errors occur in compilation __WEAK The problem of , The screenshot is as follows ：

The error message prompted is as follows ：

..\..\..\..\mcu\common\interrupts_hc32l13x.c(72): error:  #77-D: this declaration has no storage class or type specifier
  __WEAK void Uart1_IRQHandler(void);
..\..\..\..\mcu\common\interrupts_hc32l13x.c(72): error:  #65: expected a ";"
  __WEAK void Uart1_IRQHandler(void);
..\..\..\..\mcu\common\interrupts_hc32l13x.c(73): error:  #77-D: this declaration has no storage class or type specifier
  __WEAK void LpUart0_IRQHandler(void);
..\..\..\..\mcu\common\interrupts_hc32l13x.c(73): error:  #65: expected a ";"
  __WEAK void LpUart0_IRQHandler(void);
..\..\..\..\mcu\common\interrupts_hc32l13x.c(74): error:  #77-D: this declaration has no storage class or type specifier
  __WEAK void LpUart1_IRQHandler(void);
..\..\..\..\mcu\common\interrupts_hc32l13x.c(74): error:  #65: expected a ";"
  __WEAK void LpUart1_IRQHandler(void);
..\..\..\..\mcu\common\interrupts_hc32l13x.c(75): error:  #77-D: this declaration has no storage class or type specifier
  __WEAK void Spi0_IRQHandler(void);
..\..\..\..\mcu\common\interrupts_hc32l13x.c(75): error:  #65: expected a ";"

  terms of settlement ：
Because in Keil Need to be defined as __weak To be recognized （ Not capitalized _WEAK), So in the header file base_types.h Add the following lines to the file to define , Compile it OK La ！

#if defined (__ICCARM__)
#define __WEAK            __WEAK __ATTRIBUTES
#elif defined (__CC_ARM)
#define __WEAK            __weak
#else
#error    "unsupported compiler!!"
#endif

2、 Cause analysis

 ARM Series compilation tool chain ：__CC_ARM、__ICCARM__、__GNUC__、__TASKING__
In order to solve the problem of error reporting above , Defined __ICCARM__ and __CC_ARM, Here's an explanation ：

__CC_ARM The corresponding platform is ：ARM RealView：
RealView, Is a set that includes compiling 、 Development tools for debugging and simulation , It needs to be combined with the development environment, such as uvision、eclipse perhaps CodeWarrior, Form an integrated development environment to use .

__ICCARM__ The corresponding platform is ：IAR EWARM：
Embedded Workbench for ARM yes IARSystems Company as ARM An integrated development environment for microprocessor development ( Hereinafter referred to as IAR EWARM). Compare other ARM development environment ,IAR EWARM It's easy to get started 、 Easy to use and compact code .

__GNUC__ The corresponding platform is ：GNU Compiler Collection:
GCC The original intention is to GNU A compiler specially written by the operating system .GNU Systems are completely free software .