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Re: [Discuss-gnuradio] segmentation fault (core dump) -- help needed

From: Martin Braun
Subject: Re: [Discuss-gnuradio] segmentation fault (core dump) -- help needed
Date: Mon, 8 Nov 2010 13:59:08 +0100
User-agent: Mutt/1.5.20 (2009-06-14)

On Mon, Nov 08, 2010 at 07:42:25AM -0500, Thomas H Kim wrote:
> I installed Fedora Core 14 and installed all needed dependencies using YUM as
> shown below.
> yum groupinstall "Engineering and Scientific" "Development Tools"
> yum install fftw-devel cppunit-devel wxPython-devel libusb-devel guile
> boost-devel alsa-lib-devel numpy gsl-devel python-devel pygsl python-cheetah
> python-lxml
> yum install sdcc
> yum install gnuradio
> yum install gnuradio-examples
> yum install usrp

Hi Thomas,

did you install gnuradio from the Fedora repositories? Which version do
you have?
Just a couple of threads ago someone else had problems with Fedora
packages; they are not up to date.
Try grabbing a current version from the web site and build it yourself;
it's not that hard.

> The installation went ok without any issue.
> However, when I tried dial tone example at 
> "/usr/share/gnuradio/examples/audio/
> dial_tone.py", it said nothing else but "segmentation fault(core dump)", and
> nothing happened. I tried other examples, but this segmentation fault error
> came up all the time. I found a couple of simple gnu radio examples from 
> google
> and tried, but the same thing happened. I inserted print statement in the code
> to see where it failed and it failed in "my_top_block().run()" function.
> I want to know why this problem occurs and how to solve it. Can anyone help me
> out? Any idea/suggestion will be welcomed.
> I'm still studying GNU software radio blocks, but is there any way to narrow
> down which block (or which function) cause this segmentation fault?

Even in an old version, this should not happen. However, if you do have
an old version, I recommend upgrading to at least 3.3.0 and trying
again. Once it works, you'll simply have much more fun (read:
functionality) with a newer GNU Radio.

If you do want to debug you installation, a nice place to start might be
by starting the Python command line and plugging together tiny flow
graphs by hand, to see wether or not they crash.

Karlsruhe Institute of Technology (KIT)
Communications Engineering Lab (CEL)

Dipl.-Ing. Martin Braun
Research Associate

Kaiserstra├če 12
Building 05.01
76131 Karlsruhe

Phone: +49 721 608-3790
Fax: +49 721 608-6071

KIT -- University of the State of Baden-W├╝rttemberg and
National Laboratory of the Helmholtz Association

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