STM32CubeMX / C++ - Linkage Error in generated Code

Posted on June 26, 2017 at 11:49

Hi,

I want to use STM32CubeMX and I would like to program my new project in C++. I am using the latest version of STM32CubeMX (4.21.0) and the latest version of Keil uVision (5.32.0.0).

After code generation I have added the compiler flag '--cpp'. I haven't added any custom code yet. But when I compile the project I get the following error. Without the compiler flag everything compiles and links without an error or warning.

compiling main.c...

../Inc/adc.h(62): error:  &sharp337: linkage specification is incompatible with previous '_Error_Handler'  (declared at line 162 of '../Inc/main.h')

  extern void _Error_Handler(char *, int);

The function declarations for '_Error_Handler' seems to be correct. In main.c the function declaration is included from main.h and from every peripheral-header. In main.h the declaration does not have an 'extern' specifier. That seems to be the only difference. When I remove the function declaration for '_Error_Handler' in main.h, it works.

But is that the correct way of programming in C++ with STM32CubeMX projects? If so, I would need to remove the declaration of '_Error_Hanlder' every time I re-generate the code.

#c++ #cpp #stm32cubemx*