Transceiver problem

How to make this command ? Im doing this article. Also installed all those libraries. But cannot build transceiver file. Im installed libosmo-dsp. https://www.smartspate.com/how-to-create-2g-network-at-your-own-home/ root@bilguun-shady:~/Desktop/trx/src/host/layer23/src/transceiver# make install CCLD transceiver gmsk.o: In function `osmo_gmsk_free': /home/bilguun/Desktop/trx/src/host/layer23/src/transceiver/gmsk.c:83: undefined reference to `osmo_cxvec_free' /home/bilguun/Desktop/trx/src/host/layer23/src/transceiver/gmsk.c:85: undefined reference to `osmo_cxvec_free' /home/bilguun/Desktop/trx/src/host/layer23/src/transceiver/gmsk.c:87: undefined reference to `osmo_cxvec_free' gmsk.o: In function `osmo_gmsk_generate_pulse': /home/bilguun/Desktop/trx/src/host/layer23/src/transceiver/gmsk.c:110: undefined reference to `osmo_cxvec_alloc' /home/bilguun/Desktop/trx/src/host/layer23/src/transceiver/gmsk.c:123: undefined reference to `expf' gmsk.o: In function `osmo_gmsk_generate_rotation_tables': /home/bilguun/Desktop/trx/src/host/layer23/src/transceiver/gmsk.c:145: undefined reference to `osmo_cxvec_alloc' /home/bilguun/Desktop/trx/src/host/layer23/src/transceiver/gmsk.c:146: undefined reference to `osmo_cxvec_alloc' /home/bilguun/Desktop/trx/src/host/layer23/src/transceiver/gmsk.c:153: undefined reference to `cexp' /home/bilguun/Desktop/trx/src/host/layer23/src/transceiver/gmsk.c:153: undefined reference to `cexp' gmsk.o: In function `osmo_gmsk_generate_pulse': /home/bilguun/Desktop/trx/src/host/layer23/src/transceiver/gmsk.c:128: undefined reference to `sqrtf' gmsk.o: In function `osmo_gmsk_modulate_burst': /home/bilguun/Desktop/trx/src/host/layer23/src/transceiver/gmsk.c:209: undefined reference to `osmo_cxvec_alloc' /home/bilguun/Desktop/trx/src/host/layer23/src/transceiver/gmsk.c:227: undefined reference to `osmo_cxvec_convolve' /home/bilguun/Desktop/trx/src/host/layer23/src/transceiver/gmsk.c:230: undefined reference to `osmo_cxvec_free' gmsk.o: In function `osmo_gmsk_trainseq_generate': /home/bilguun/Desktop/trx/src/host/layer23/src/transceiver/gmsk.c:256: undefined reference to `osmo_cxvec_correlate' /home/bilguun/Desktop/trx/src/host/layer23/src/transceiver/gmsk.c:260: undefined reference to `osmo_cxvec_peak_energy_find' /home/bilguun/Desktop/trx/src/host/layer23/src/transceiver/gmsk.c:265: undefined reference to `osmo_cxvec_free' /home/bilguun/Desktop/trx/src/host/layer23/src/transceiver/gmsk.c:272: undefined reference to `osmo_cxvec_free' gmsk.o: In function `osmo_gmsk_trainseq_free': /home/bilguun/Desktop/trx/src/host/layer23/src/transceiver/gmsk.c:286: undefined reference to `osmo_cxvec_free' gsm_ab.o: In function `gsm_ab_detect': /home/bilguun/Desktop/trx/src/host/layer23/src/transceiver/gsm_ab.c:53: undefined reference to `osmo_cxvec_correlate' /home/bilguun/Desktop/trx/src/host/layer23/src/transceiver/gsm_ab.c:57: undefined reference to `osmo_cxvec_peak_energy_find' /home/bilguun/Desktop/trx/src/host/layer23/src/transceiver/gsm_ab.c:67: undefined reference to `osmo_cxvec_free' /home/bilguun/Desktop/trx/src/host/layer23/src/transceiver/gsm_ab.c:67: undefined reference to `osmo_cxvec_free' gsm_ab.o: In function `gsm_ab_demodulate': /home/bilguun/Desktop/trx/src/host/layer23/src/transceiver/gsm_ab.c:90: undefined reference to `osmo_cxvec_scale' /home/bilguun/Desktop/trx/src/host/layer23/src/transceiver/gsm_ab.c:91: undefined reference to `osmo_cxvec_delay' demod.o: In function `gsm_ab_ind_process': /home/bilguun/Desktop/trx/src/host/layer23/src/transceiver/demod.c:51: undefined reference to `osmo_cxvec_alloc' /home/bilguun/Desktop/trx/src/host/layer23/src/transceiver/demod.c:62: undefined reference to `osmo_cxvec_sig_normalize' /home/bilguun/Desktop/trx/src/host/layer23/src/transceiver/demod.c:70: undefined reference to `cabsf' /home/bilguun/Desktop/trx/src/host/layer23/src/transceiver/demod.c:76: undefined reference to `cabsf' /home/bilguun/Desktop/trx/src/host/layer23/src/transceiver/demod.c:101: undefined reference to `osmo_cxvec_free' collect2: error: ld returned 1 exit status Makefile:355: recipe for target 'transceiver' failed make: *** [transceiver] Error 1 What should i do ?