nrf_pwr_mgmt.c:78: undefined reference to `__start_pwr_mgmt_data' when using pwr management

Question

Hello everyone, I am running a code with uart i2c interruption and power management but I have this error : nrf_pwr_mgmt.c:78: undefined reference to `__start_pwr_mgmt_data' 
 I already try to copie some code in the linker script but it doesn't work. Maybe I am doigt it wrong. 
 Thank you have a good day ! 
 best regards, 
 Arnaud

N Ashelman · Answer

Well, here's the answer. Looks like this problem is specific to using SES IDE. How would any developer be expected to know this!! 
 A similar DevZone post about "undefined reference to '__fs_data_load_start__' " led me to suspect the flash_placement.xml file. Comparing that file in my project to the one in examples/peripheral/pwr_mgmt/ gave the solution. 
 In file flash_placement.xml, the following line is needed (it should be after the name=".text" line): 
 <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" /> 
 Apparently, not all the example projects include this line (my project started with the blinky example).

nrf_pwr_mgmt.c:78: undefined reference to `__start_pwr_mgmt_data' when using pwr management

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