Cortex -M3 processor 不支持AMR指令?

项目用的是STM32F103RC, IDE是Keil V5.26

当我尝试把其中一C文件加上--arm 编译选项后, 编译报错如下

*** Using Compiler 'V5.06 update 6 (build 750)', folder: 'D:\Program Files (x86)\Keil_v5\ARM\ARMCC\Bin'
compiling stm32f10x_it.c...
Error: C4006E: specified processor or architecture does not support ARM instructions
"Src\stm32f10x_it.c" - 1 Error(s), 0 Warning(s).

请问这是Keil设置的问题? 还是什么问题?

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