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IAR预编译问题

IAR编译器里预编译把“MT_TASK MT_SYS_FUNC MT_ZDO_FUNC”改为“xMT_TASK xMT_SYS_FUNC xMT_ZDO_FUNC”为什么会出错,Error[e46]: Undefined external "debug_str::?relay" referred in hal_lcd

该如何解决?