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#ifdef USE_TABLES
//Linker defined variables
extern uint16_t FFTTwiddlesRunStart;
extern uint16_t FFTTwiddlesLoadStart;
extern uint16_t FFTTwiddlesLoadSize;
#endif //USE_TABLES
未定义FFTTwiddlesRunStart;FFTTwiddlesLoadStart;FFTTwiddlesLoadSize;
请问它们在哪个文件中被定义了