Scanning dependencies of target hackrf_usb.elf
make[4]: Leaving directory '/home/kaback/GITROOT/f1rmware/hackrf/firmware/hackrf_usb/build'
make[4]: Entering directory '/home/kaback/GITROOT/f1rmware/hackrf/firmware/hackrf_usb/build'
[ 97%] Linking C executable hackrf_usb.elf
CMakeFiles/hackrf_usb_objects.dir/usb_api_sweep.c.obj: In function `sweep_mode':
/home/kaback/GITROOT/f1rmware/hackrf/firmware/hackrf_usb/usb_api_sweep.c:96: undefined reference to `hackrf_ui_startSweepMode'
/home/kaback/GITROOT/f1rmware/hackrf/firmware/hackrf_usb/usb_api_sweep.c:161: undefined reference to `hackrf_ui_stopSweepMode'
collect2: error: ld returned 1 exit status