Why .elf file does not exist ?

[MSant.11]

I'm trying to validate on target the example proposed in https://www.youtube.com/watch?v=k8AAr84z27s concerning the asc NN implementation with X-CUBE AI.

My target is the NUCLEO-F401RE instead.

After generating code I try to build and I get the warnings:

..........................................................................................

../Core/Src/main.c:179:13: warning: 'MX_GPIO_Init' defined but not used [-Wunused-function]

 179 | static void MX_GPIO_Init(void)

   |       ^~~~~~~~~~~~

../Core/Src/main.c:146:13: warning: 'MX_USART2_UART_Init' defined but not used [-Wunused-function]

 146 | static void MX_USART2_UART_Init(void)

   |       ^~~~~~~~~~~~~~~~~~~

../Core/Src/main.c:120:13: warning: 'MX_CRC_Init' defined but not used [-Wunused-function]

 120 | static void MX_CRC_Init(void)

............

c:\st\stm32cubeide_1.6.1\stm32cubeide\plugins\com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.9-2020-q2-update.win32_2.0.0.202105311346\tools\arm-none-eabi\bin\ld.exe: ./Core/Startup/startup_stm32f401retx.o: in function `LoopFillZerobss':

C:/Users/marco/STM32CubeIDE/workspace_1.6.1/testing ai sound/Debug/../Core/Startup/startup_stm32f401retx.s:100: undefined reference to `main'

collect2.exe: error: ld returned 1 exit status

make: *** [makefile:66: testing ai sound.elf] Error 1

"make -j8 all" terminated with exit code 2. Build might be incomplete.

...........................................................................................................................

Launching the program I get: Program file does not exist

C:\Users\marco\STM32CubeIDE\workspace_1.6.1\testing ai sound\Debug\testing ai sound.elf not found

I updated to PE64 Windows binary parser, but without success.

What can I do? Thanks

[Tesla DeLorean]

>>Why .elf file does not exist ?

Because the linker didn't get closure and so didn't generate it?

It's complaining it can't find a main() function.

Do you have one in your compiled files? Are you using C++ / .cpp files?

[MSant.11]

Thanks DeLorean.

The reason was the Application Structure of STM32CubeMX.

It was selected the option "Do not generate the main ()"

Now I get this warning instead:

"c:\st\stm32cubeide_1.6.1\stm32cubeide\plugins\com.st.stm32cube.ide.mcu.externaltools.gnu-tools-for-stm32.9-2020-q2-update.win32_2.0.0.202105311346\tools\arm-none-eabi\bin\ld.exe: ./X-CUBE-AI/App/app_x-cube-ai.o: in function `MX_X_CUBE_AI_Init':

C:/Users/marco/STM32CubeIDE/workspace_1.6.1/test ai ASC/Debug/../X-CUBE-AI/App/app_x-cube-ai.c:73: undefined reference to `MX_USART2_UART_Init'

collect2.exe: error: ld returned 1 exit status

make: *** [makefile:66: test ai ASC.elf] Error 1

"make -j8 all" terminated with exit code 2. Build might be incomplete.

12:02:28 Build Failed. 3 errors, 0 warnings. (took 2s.464ms)"

and USART2 is the standard COM port for NUCLEO-F401RE.