As of this writing (fall 2016) we recommend the following procedures to install OP25 instead of using pybombs.
This recipe has been tested on ubuntu 14.04 only, it is likely NOT to work in either 12.04 or 16.04...
First, use these commands to install the pre-reqs
sudo apt-get update sudo apt-get build-dep gnuradio sudo apt-get install gnuradio gnuradio-dev gr-osmosdr librtlsdr-dev libuhd-dev libhackrf-dev libitpp-dev libpcap-dev git
Second, use these commands to build and install OP25: (Note, the mkdir build; cd build; cmake ../; make; sudo make install sequence is a bog-standard form when source-building apps that utilize cmake.)
cd ~ git clone git://op25.osmocom.org/op25.git cd op25 mkdir build cd build cmake ../ make sudo make install sudo ldconfig
Finally you may need to use the command
sudo rmmod dvb_usb_rtl28xxu
to remove the DVB kernel module that conflicts with the RTL USB SDR. You may also need to edit the system udev rules for the RTL -both are common issues and you can search for the needed resources if the RTL isn't getting recognized... Once this is all done (no longer a need to source any env commands into the shell) you should be ready to invoke scope.py, which is the principal OP25 GUI app... As a pre-check, you can also run the osmocom_fft application (which should install as part of the pre-reqs) to test basic RTL connectivity and rule out related problems before invoking scope.py...
Install Instructions (Deprecated)
Although we no longer recommend the use of pybombs to install OP25, the instructions below are retained here for reference. It may still be possible to use pybombs (esp. version 1) to build and install OP25 but this has not been tested.
The current version of OP25 is installed via pybombs http://gnuradio.org/redmine/projects/pybombs/wiki
To install OP25 using pybombs, run these commands
git clone git://github.com/pybombs/pybombs cd pybombs ./pybombs install gr-op25
It should be OK to take all the defaults when asked for pybombs options. The installation process may take a long time. It isn't necessary to install GNURadio as a separate step, since GNURadio is automatically installed by pybombs as are other gr-op25 prerequisites.
Once pybombs has finished you must set up the environment
This will generate the proper environment-setting commands and write them to a file. The name of the file is printed, for example /foo/bar/setup_env.sh. Now you must stream those commands into your running shell by using the following command
You must replace the example file name shown above (/foo/bar/setup_env.sh) with the actual name that "./pybombs env" printed.