Error L6218E not solving

[Rachit]

I have included app_fifo files in the group as well as in the linker along with enabled APP_UART in Configuration wizard of sdk_config.h still the error persists. Please help

*** Using Compiler 'V5.06 update 5 (build 528)', folder: 'C:\Keil_v5\ARM\ARMCC\Bin'
Build target 'nrf52832_xxaa'
compiling nrf_drv_saadc.c...
linking...
.\_build\nrf52832_xxaa.axf: Error: L6218E: Undefined symbol app_fifo_flush (referred from app_uart_fifo.o).
.\_build\nrf52832_xxaa.axf: Error: L6218E: Undefined symbol app_fifo_get (referred from app_uart_fifo.o).
.\_build\nrf52832_xxaa.axf: Error: L6218E: Undefined symbol app_fifo_init (referred from app_uart_fifo.o).
.\_build\nrf52832_xxaa.axf: Error: L6218E: Undefined symbol app_fifo_put (referred from app_uart_fifo.o).
Not enough information to list image symbols.
Not enough information to list load addresses in the image map.
Finished: 2 information, 0 warning and 4 error messages.
".\_build\nrf52832_xxaa.axf" - 4 Error(s), 0 Warning(s).
Target not created.
Build Time Elapsed:  00:00:04

[MartinBL]

Can you confirm that you have added "your_sdk_folder\components\libraries\fifo\app_fifo.c" to your project?

If you have,

1. What SDK are you using?
2. Can you put your project folder in a zip file and upload it?

[Rachit]

I'm using SDK 14.2 and I have added the .c file path which you can see in the image below

[MartinBL]

I can see app_uart_fifo.c in that list, but not app_fifo.c. Your undefined symbols are defined in app_fifo.c. You have added the correct path to your includes, but seem to have forgotten to add the .c file to your project. 

[Rachit]

That screenshot did not cover the entire list. Check this one.

[MartinBL]

Have you enabled app_fifo in your sdk_config.h too? 

You might need to add these lines of code in sdk_config.h:

#ifndef APP_FIFO_ENABLED
#define APP_FIFO_ENABLED 1
#endif

[Rachit]

Yes that was the issue. Thank you.