nrf_section_iter problem with SDK 15 and armgcc

[NewtoM]

Hello,

I am porting OpenWSN to the nRF52840 DK. While implementing power management, I was about to use the Power Management Library from SDK 15. Many other modules, drivers, libraries compile and build fine, but with "nrf_pwr_mgmt.c" I get following error:

Linking
build/nrf52840dk_armgcc/bsp/boards/libbsp.a(nrf_pwr_mgmt.o):/mnt/d/GIT/openwsn-fw_FW-751/build/nrf52840dk_armgcc/bsp/boards/nrf52840dk/sdk/components/libraries/pwr_mgmt/nrf_pwr_mgmt.c:78: undefined reference to `__start_pwr_mgmt_data'
build/nrf52840dk_armgcc/bsp/boards/libbsp.a(nrf_pwr_mgmt.o):(.rodata.pwr_mgmt_data+0x4): undefined reference to `__stop_pwr_mgmt_data'

As far as I see, the problem gets back to nrf_section_iter, but I cannot find the root of the problem. The NRF_SECTION_ITER_ENABLED has been defined as 1 in the sdk_config.h.

Any idea what I could have forgotten?

Thanks,

Tamas

[NewtoM]

OK, I managed to get over the problem by inserting

SECTIONS
{
  .pwr_mgmt_data :
  {
    PROVIDE(__start_pwr_mgmt_data = .);
    KEEP(*(SORT(.pwr_mgmt_data*)))
    PROVIDE(__stop_pwr_mgmt_data = .);
  } > FLASH
} 

into my linker script file. Alternatively, using config\nrf52840\armgcc\generic_gcc_nrf52.ld as linker script from SDK 15 also works.

[ephimee]

I have the same problem. Where can I find my linker script file? I'm using Segger

[oguzhanK]

Just add the line below to "flash_placement.xml" in your project folder.

<ProgramSection alignment="4" keep="Yes" load="Yes" name=".pwr_mgmt_data" inputsections="*(SORT(.pwr_mgmt_data*))" address_symbol="__start_pwr_mgmt_data" end_symbol="__stop_pwr_mgmt_data" />

[RenanSP]

Thanks! I wasted hours trying to figure this out. I really wish nRF5 SKD / Segger would better centralize the configurations. Too many related configurations are dispersed among several menus, directories, and files.