I tried to install openbts in different versions of Ubuntu, but failed.
On Ubuntu 18.04:

Add here commands to clean up after the build process.

/usr/bin/make distclean
make[1]: Entering directory '/home/lin/dev/libcoredumper/coredumper-1.2.1'
make[1]: *** No rule to make target 'distclean'. Stop.
make[1]: Leaving directory '/home/lin/dev/libcoredumper/coredumper-1.2.1'
debian/rules:55: recipe for target 'clean' failed
make: [clean] Error 2 (ignored)
cp -f /usr/share/misc/config.sub config.sub
cp -f /usr/share/misc/config.guess config.guess
dh_clean
dh_clean: Compatibility levels before 5 are no longer supported (level 4 requested)
debian/rules:55: recipe for target 'clean' failed
make: *** [clean] Error 25
dpkg-buildpackage: error: fakeroot debian/rules clean subprocess returned exit status 2
ERROR: command failed!

ERROR: command failed!

On Ubuntu 16.04:
Makefile:606: recipe for target 'transceiver' failed
make[3]: *** [transceiver] Error 1
make[3]: Leaving directory '/home/lin/dev/openbts/Transceiver52M'
Makefile:572: recipe for target 'all-recursive' failed
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory '/home/lin/dev/openbts'
Makefile:503: recipe for target 'all' failed
make[1]: *** [all] Error 2
make[1]: Leaving directory '/home/lin/dev/openbts'
debian/rules:74: recipe for target 'install-arch' failed
make: *** [install-arch] Error 2
dpkg-buildpackage: error: fakeroot debian/rules binary gave error exit status 2

ERROR: command failed!

I don't know how to solve these problems. Please help me.