Linking Error: Eclipse with ARMGCC Toolchain

[atharva]

The current configuration looks as follows:

IDE: Eclipse 

Toolchain: ARMGCC

SDK: SDK5_NRF_14

DK: NRF52DK-PCA10040

I am trying to port the 'bootloader_secure_ble' to the bootloader section of a project. The bootloader (currently non-dfu) uses a custom makefile. This makefile is good enough to get a working bootloader run a heavy application. While resolving dependencies for the 'bootloader_secure_ble', I have come across the following Linker error.

The compiler does not throw any errors, and the said .o files are in the needed folder.

Has anyone come across a similar problem? I am not even sure where to look for it anymore!  

C:\Users\atharva\AppData\Local\Temp\ccjixT80.ltrans0.ltrans.o: In function `app_error_fault_handler':
C:/nrf/sdk/nrf5_sdk_14/components/libraries/util/app_error_weak.c:60: undefined reference to `app_error_save_and_stop'
C:\Users\atharva\AppData\Local\Temp\ccjixT80.ltrans2.ltrans.o: In function `ble_evt_handler':
C:/nrf/sdk/nrf5_sdk_14/components/libraries/bootloader/ble_dfu/nrf_ble_dfu.c:689: undefined reference to `nrf_dfu_req_handler_reset_if_dfu_complete'
C:\Users\atharva\AppData\Local\Temp\ccjixT80.ltrans2.ltrans.o: In function `on_ctrl_pt_write':
C:/nrf/sdk/nrf5_sdk_14/components/libraries/bootloader/ble_dfu/nrf_ble_dfu.c:463: undefined reference to `nrf_dfu_req_handler_on_req'

[MartinBL]

Looks like there are some .c files missing in your makefile. app_error_save_and_stop() for example, is included in app_error.c. Have you included this? The other two functions that seem to be undefined are located in nrf_dfu_req_handler.c. 

Have you defined DEBUG in your C flags? As far as I can see, app_error_save_and_stop() shouldn't be required without it. 

[atharva]

Thanks for that. The solution now seems relatively simple, but it was a bit of a task to resolve all dependencies keeping one eye on the size and given the fact that these errors are encountered only during linking. Also what complicated the process was highly customized nature of the makefile and the linker. Also, yes on the DEBUG flag.