undefined symbol, while build lbs example on nRF52

undefined symbol, while build lbs example on nRF52https://devzone.nordicsemi.com/f/nordic-q-a/9648/undefined-symbol-while-build-lbs-example-on-nrf52I try to move the code " github.com/.../nrf51-ble-app-lbs" to nRF52. I meet this problem: ._build\nrf52832_xxaa_s132.axf: Error: L6218E: Undefined symbol app_gpiote_init (referred from main.o). Not enough information to list image symbols. Finisheden-USTelligent Community 13Sat, 10 Oct 2015 01:14:44 GMTRE: undefined symbol, while build lbs example on nRF52https://devzone.nordicsemi.com/thread/35654?ContentTypeID=1Sat, 10 Oct 2015 01:14:44 GMT137ad170-7792-4731-bb38-c0d22fbe4515:54cb0697-fde1-4a46-a49e-186e87bcd76etaylorshieh<p>Add the app_gpiote.c to Project, this issue have been closed.</p><div style="clear:both;"></div>