compiling beep.c...
linking...
..OBJTemplate.axf: Error: L6218E: Undefined symbol BEEP_Init (referred from main.o).
..OBJTemplate.axf: Error: L6218E: Undefined symbol GPIO_SetBit (referred from led.o).
Not enough information to list image symbols.
Finished: 1 information, 0 warning and 2 error messages.
"..OBJTemplate.axf" - 2 Error(s), 4 Warning(s).
显示这段提示，具体怎么回事呢？
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