什么是IAR相当于'__attribute __（（弱，别名（#f）））'？

Question

我使用LPC系列（NXP）作为控件。现在，我们正在切换到另一个MCU（Spansion），编译器从GNU到IAR。 IAR和GNU之间的某些属性不一样，我想请求帮助：

过去（GNU）：

#define ALIAS(f) __attribute__((weak, alias (#f)));
#define CSV_IRQHandler(void)   ALIAS(IntDefaultHandler)

如果编译器更改为IAR，会有什么不同？

如果我使用相同的语法，我会收到错误：

Error[Pe130]: expected a "{"

任何建议都将不胜感激！

Answer 1

您应该可以使用#pragma weak CSV_IRQHandler=IntDefaultHandler

来自＆＃34; IAR C / C ++开发指南＆＃34;

weak

Syntax           #pragma weak symbol1={symbol2}

Parameters       symbol1 A function or variable with external linkage
                 symbol2 A defined function or variable.

Description      This pragma directive can be used in one of two ways:
                 ● To make the definition of a function or variable with external linkage a weak
                   definition. The __weak attribute can also be used for this purpose.
                 ● To create a weak alias for another function or variable. You can make more                
                   than one alias for the same function or variable.

 Example        To make the definition of foo a weak definition, write:

                #pragma weak foo

                To make NMI_Handler a weak alias for Default_Handler, write:

                #pragma weak NMI_Handler=Default_Handler

                If NMI_Handler is not defined elsewhere in the program, all references to 
                NMI_Handler will refer to Default_Handler.