CubeIDE CPP project and Assembly Include

Hello,

I have problem with including assembly code into my C++ project.

Include section of main.cpp:

#include "asm_math_wk.h"

asm_math_wk.h file:

#ifndef INC_ASM_MATH_WK_H_
#define INC_ASM_MATH_WK_H_

extern void megawkurw(uint32_t test);

#endif /* INC_ASM_MATH_WK_H_ */

asm_math_wk.s file:

.syntax unified

.global megawkurw
.type megawkurw, %function

megawkurw:
.fnstart
movs R1, R0
bx LR
.fnend

When I call my assembly function:

megawkurw(999);

I get build error:

main.cpp: undefined reference to 'megawkurw(unsigned long)'

This problem occurs only in .cpp, when I include same assembly code into the .c project, everything compiles fine.

Best Regards