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CCS V5.3版本对GNU扩展特性是否支持的问题

在编写代码是要用到GNU的扩展特性,定义了一个数组如下:

volatile unsigned int pageTable[4*1024] __attribute__((aligned(16*1024)));

但是编译报错:“#66 expected a ";"”

可以确定的是程序中别的地方没问题。所以请教一下,是不是CCS V5.3是不是要做什么设置才能支持GNU扩展。