Eclipse: undefined reference to

[AShva.1]

Hi!

I am trying to compile a project from several files in Eclipse.

Function print_hello() defined in another file N222.

Resulting error: undefined reference to `print_hello '

What am I doing wrong?

 

regards

Alexander

[ArmandG]

Hi @JulianSTMhvalev​ ,

In your 222.c you have to write "extern void print_hello();"​ at the 13rd line otherwise it cannot recognize the function.

Regards,

Armand

[AShva.1]

Hi Armand!

done

Same error :(

Regards

Alexander/

[ArmandG]

​Hi Alexander,

Is it working if you create a 222N.h header file where you define the hello_world function ?

Don't forget to include it in both files 222.c and 222N.c

Regards,

Armand

[AShva.1]

Hi Armand!

done

Same error :(

Eclipse IDE for C/C++ Developers

Version: 2020-03 (4.15.0)

Build id: 20200313-1211

Regards

Alexander

[ArmandG]

​Hi Alexander,

On our side it's still working on Eclipse with your code. Are you sure the 222N.c file is well implemented in your project ? Because on the console, it seems like only the main file 222.c is compiled and not the 222N.c file, that's why it doesn't recognize the function. I suggest you to refresh the project to make sure the file is well implemented. By the way, what are your compiler / linker settings on Eclipse ?

Regards,

Armand

[AShva.1]

Hi Armand!

thank you for your help

I also think something is wrong in the linker or compiler settings

settings:

compiler:

-I/home/alexsander/STM32MPU_workspace/STM32MP15-Ecosystem-v1.2.0/Developer-Package/SDK/sysroots/x86_64-ostl_sdk-linux/usr/include -I/home/alexsander/eclipse-workspace/222/inc -O0 -g3 -Wall --sysroot=/home/alexsander/STM32MPU_workspace/STM32MP15-Ecosystem-v1.2.0/Developer-Package/SDK/sysroots/cortexa7t2hf-neon-vfpv4-ostl-linux-gnueabi -march=armv7ve -mthumb -mfpu=neon-vfpv4 -mfloat-abi=hard -mcpu=cortex-a7

linker:

-nostartfiles -L/home/alexsander/eclipse-workspace/222/src --sysroot=/home/alexsander/STM32MPU_workspace/STM32MP15-Ecosystem-v1.2.0/Developer-Package/SDK/sysroots/cortexa7t2hf-neon-vfpv4-ostl-linux-gnueabi -marm -mfpu=neon-vfpv4 -mfloat-abi=hard -mcpu=cortex-a7

I will be glad to your prompts 🙂

Regards

Alexander

[Piranha]

Look at the log after "make all" command - file "222N.c" is not compiled at all. You have to sort out that.

[AShva.1]

Hi Piranha !

I'm looking for an answer on how to do this.

Сan you advise something?

Regards

Alexander

[Piranha]

So what have you done yourself while "looking"? Checked paths, file properties, compiler configuration?

I don't like Eclipse and use EmBitz instead... Probably @Pavel A.​ can give some advice.