[op25-dev] Undefined Symbol Error

'William Becks' wa8wg@centurytel.net [op25-dev] op25-dev at yahoogroups.com
Thu Sep 21 13:39:47 UTC 2017



Can you also post your test.tsv file and elaborate on the specific P25 system that you desire to monitor?    I have not had any issues with the RTL SDR on OP25 scope.py running under Ubuntu 14.04 using the following command outline to build my system.   Let me know if you are running Ubuntu in VirtualBox on a Windows machine as there are a couple of additional pointers that I can pass along.


Download and install Ubuntu 14.04 Latest:  <http://releases.ubuntu.com/14.04/> http://releases.ubuntu.com/14.04/

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

cd ~
git clone git://op25.osmocom.org/op25.git
cd op25
mkdir build
cd build
cmake ../
sudo make install
sudo ldconfig

sudo nano /etc/modprobe.d/dvb-blacklist.conf
blacklist r820t
;blacklist rtl2832
blacklist rtl2830
blacklist dvb_usb_rtl28xxu

# ctrl+x to save and exit

sudo cp /etc/pulse/client.conf /etc/pulse/client.confbackup
sudo nano /etc/pulse/client.conf
Edit the following line: From: ; autospawn = yes To: autospawn = no


Create trunk.tsv
Create trunkgroup.tsv

Create scope.sh


cd /home/username/op25/op25/gr-op25_repeater/apps

./scope.py --args rtl=0 -N LNA:46 -f 853.9125e6 -S 2560000-q 0

-V -T trunk.tsv

chmod +x scope.sh


Bill, WA8WG



From: op25-dev at yahoogroups.com [mailto:op25-dev at yahoogroups.com] 
Sent: Thursday, September 21, 2017 7:13 AM
To: op25-dev at yahoogroups.com
Subject: Re: [op25-dev] Undefined Symbol Error



Here is the command I was using

./scope.py  --args 'rtl' --gains 'lna:44' -f 154732500 -q 1 -S 2000000  -V -T test.tsv





On Wed, Sep 20, 2017 at 12:48 PM, 'William Becks' wa8wg at centurytel.net [op25-dev] <op25-dev at yahoogroups.com> wrote:




Can you post your scope.py command line as a starting point?


Bill, WA8WG



From: op25-dev at yahoogroups.com [mailto:op25-dev at yahoogroups.com] 
Sent: Wednesday, September 20, 2017 8:15 AM
To: op25-dev at yahoogroups.com
Subject: [op25-dev] Undefined Symbol Error



Hi again all,

I'm trying to get the main branch running with some of the changes that Joe incorporated last year. Everything compiles fine (this is a fresh install of Ubuntu 14.04) but when running scope.py I'm getting and undefined symbol error:

 (most recent call last):
  File "./scope.py", line 55, in <module>
    import op25_repeater
  File "/usr/local/lib/python2.7/dist-packages/op25_repeater/__init__.py",
line 45, in <module>
    from op25_repeater_swig import *
line 28, in <module>
    _op25_repeater_swig = swig_import_helper()
line 24, in swig_import_helper
    _mod = imp.load_module('_op25_repeater_swig', fp, pathname, description)
ImportError: /usr/local/lib/libgnuradio-op25_repeater.so: undefined
symbol: _ZN8p25p2_vf12encode_dstarEPhPKi

Searching around for this does not turn up anything really. Has anyone seen this before?


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