I installed the master branch of SEMS(1.7.0~dev) as you suggested. I used these commands:
$ ln -s pkg/deb/buster ./debian
$ dch -v 1.7.0~dev "SEMS 1.7.0~dev release"
$ dpkg-buildpackage -rfakeroot -us -uc
Does it need to run "make & make install" commands after above commands or not? because i got these error as i told
usr/bin/ld: AmDtmfDetector.o: in function `AmSpanDSPInbandDtmfDetector::streamPut(unsigned char const*, unsigned int, unsigned long long)':
./core/AmDtmfDetector.cpp:768: undefined reference to `dtmf_rx'
/usr/bin/ld: AmDtmfDetector.o: in function `AmSpanDSPInbandDtmfDetector::AmSpanDSPInbandDtmfDetector(AmKeyPressSink*, int)':
./core/AmDtmfDetector.cpp:749: undefined reference to `dtmf_rx_init'
/usr/bin/ld: AmDtmfDetector.o: in function `AmSpanDSPInbandDtmfDetector::~AmSpanDSPInbandDtmfDetector()':
./core/AmDtmfDetector.cpp:763: undefined reference to `dtmf_rx_free'
/usr/bin/ld: AmDtmfDetector.o: in function `AmSpanDSPInbandDtmfDetector::AmSpanDSPInbandDtmfDetector(AmKeyPressSink*, int)':
./core/AmDtmfDetector.cpp:754: undefined reference to `dtmf_rx_set_realtime_callback'
collect2: error: ld returned 1 exit status
make[1]: *** [Makefile:115: sems] Error 1
make[1]: Leaving directory '/usr/src/sems-master/core'
make: *** [Makefile:38: install] Error 2
--
--Mojtaba Esfandiari.S