Error compiling ./build_SDRplay_WB

[pascal174]

I have no problems compiling the NB script. Bur when I execute ./build_SDRplay_WB Below errors happens

cc -g -o qo100websdr qo100websdr.o sdrplay.o fir_table_calc.o wf_univ.o websocket/websocketserver.o websocket/ws_callbacks.o websocket/base64.o websocket/sha1.o websocket/ws.o websocket/handshake.o audio.o setqrg.o rtlsdr.o timing.o fifo.o ssbfft.o cat.o civ.o wb_fft.o minitiouner.o setup.o beaconlock.o -lpthread -lm -lmirsdrapi-rsp -lfftw3 -lfftw3_threads -lsndfile -lasound -lrtlsdr /usr/bin/ld: sdrplay.o: in function setTunedQrgOffset': sdrplay.c:(.text+0x358): undefined reference to lastsdrqrg' /usr/bin/ld: sdrplay.o: in function reset_Qrg_SDRplay': sdrplay.c:(.text+0x41c): undefined reference to lastsdrqrg' /usr/bin/ld: wf_univ.o: in function drawWF': wf_univ.c:(.text+0x270): undefined reference to old_drift' collect2: error: ld returned 1 exit status make: *** [Makefile:14: qo100websdr] Error 1