Hi Sipos, Omar,

You should use the following branches:

libosmocore branch master

libosmo-abis branch master

osmo-trx branch fairwaves/master

osmo-bts branch fairwaves/master ( use ./configure --enable-trx)

openbsc branch fairwaves/master

osmo-pcu branch master (use ./configure --enable-sysmocom-bts )

openggsn branch master

Also if you use the same machine for sgsn, bts and pcu, you should change openbsc.cfg, instead of:
  gprs nsvc 0 local udp port 23000
  gprs nsvc 0 remote udp port 23000
use different ports, for example:
  gprs nsvc 0 local udp port 5948
  gprs nsvc 0 remote udp port 23000

--
Regards,
Ivan Kluchnikov.
http://fairwaves.ru