Linking issue

[somprakashrao]

Getting undefined reference to `<already_defined_variable>'

So I was using SES v5.70a

Actually I was new for the developments using SES for Arm MCs

I picked up an RTOS example and started adding the source files and header files to the project

Also did added the file paths to the common preprocessor User include directory

But while calling the functions from those source file I was getting the undefined reference error

I can assure that when I try to check for the function definition, I was able to be directed to the part of the code where the function defined

Please help me if I was lagging somewhere to the files to be linked.

Thanks in Advance...

[Amanda Hsieh]

Hi, 

What NCS version are you using?

Please take a look at https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/device_guides/nrf91.html for nRF9160.

Regards,
Amanda H.

[somprakashrao]

Im using nRF SDK 17.1.0.  

[Amanda Hsieh]

So I was using SES v5.70a

Please use SES v5.42a as the release note:

The following toolchains/devices have been used for testing and verification:
 
 - ARM: MDK-ARM version 5.25   
 - GCC: GCC ARM Embedded 9.2020-q2.major
 - IAR: IAR Workbench 7.80.4
 - SES: SES 5.42a

-Amanda H.

[somprakashrao]

Amanda Hsieh said:

-Amanda H.

Tried with 5.42a SES as well.

Getting the same linking errors

[Amanda Hsieh]

I picked up an RTOS example and started adding the source files and header files to the project

Which example are you using? Did you follow the instructions of the Adding files doc?

[somprakashrao]

Using blinky_FreeRTOS example.

Setup was as per the instructions in Adding files doc.

[hmolesworth]

Worth checking for typos: Should the `<already_defined_variable>' be in a .h file instead of a .c file it will create multiple definitions and issue this warning. Sometimes this is unintended:

.c:

myVariable = 0;

.h

myVariable = 0; <<== generates multiple definitions if this .h file included in 2 or more .c files

fix by changing the line in the .h to

extern myVariable;

.

.