Re: undefined reference to __set_MSP

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Johnny Nguyen

• November 21, 2019 14:34

Hello,

I'm new to CrossStudio and STM32. I having an error when it's Linking the bootloader.elf. It seems like I'm having some issue with my stack pointer. Can anyone help me with this issue? See the error message bellow:

Building “Traulsen IO Bootloader” in configuration “THUMB Flash Release”
Linking Traulsen IO Bootloader.elf
C:/Rowley Associates Limited/CrossWorks for ARM 2.0/gcc/bin/ld: THUMB Flash Release/main.o: in function `main':
main.c:(.text+0x5d2): undefined reference to `__set_MSP'
Build failed

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  Jon Elliott

  • November 22, 2019 09:12

  Hi Johnny,

  __set_MSP is defined as an inline function in the CMSIS-CORE header files. So including the CMSIS-CORE header file for the core you using (for example core_cm4.h for Cortex-M4) in the module calling the function should solve the problem.

  Regards,

  Jon

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