Sir:

If you look in the place where you built gr-osmosdr, you will find a file called install_manifest.txt which contains where it put all the files. The rtlsdr_source_c.xml and osmosdr_source_c.xml (which are files that describe the sources, both of which produce streams of complex numbers, which is what the naming convention means) are how the gnuradio companion knows how to use those sources.

Do a "sudo make uninstall" where you built gr-osmosdr, and then start over with gr-osmosdr. But this time, instead of just running "cmake" with no options, use the command:

cmake .. -DCMAKE_INSTALL_PREFIX=/usr

You "define" (that's what "-D" means) the value "CMAKE_INSTALL_PREFIX" to be /usr. If you don't define it to be something, it will use the default value of "/usr/local"

I have a Web page with partial instructions (it's not intended to be a Linux introduction, although I will do my best to answer specific questions if you have any) and some other stuff on it: http://www.ka8kpn.org/sdr-dongle.html

Oh, and while I'm thinking about it, I really detest mailing lists whose default action on a reply is to write directly to the person to whom you are responding rather than to the list. To me, it is optimizing the atypical case and it makes far more sense to optimize for what everyone nearly always wants to do. That is, it may be technically correct, but it is definitely the wrong thing to do. However, I know I've lost that battle, so I'll not mention it again.

On 01/12/2013 03:24 PM, tokens@myranch.com wrote:

Hi Jonathan,

Please excuse my ignorant comments and questions but I am very much a Linux novice.

I see that there are directories for gr-osmosdr, rtl-sdr, and uhd under home directory. Under usr/local/share/gnuradio/grc/blocks/ I find osmosdr_source_c.xml and rtlsdr_source_c.xml. Directories for gnuradio are under usr/etc and usr/include. I guess this is what you mean by some bits of gr-osmosdr and rtlsdr end up in usr/local. How do I force cmake to install the software into /usr.

Thank you very much.

Regards,
Al

-----Original Message----- From: Jonathan Guthrie
Sent: Saturday, January 12, 2013 2:18 PM
To: tokens@myranch.com
Subject: Re: rtl-sdr and gr-osmosdr

On 01/12/2013 09:03 AM, tokens@myranch.com wrote:

I have installed these using the procedures shown in the wiki. I didn’t see any errors during the installation. The packages are on the computer but they are not listed amongst the sources on GNU Radio Companion.
If I type in the terminal rtl_test –t I get:
Found 1 device(s):
0: ezcap USB 2.0 DVB-T/DAB/FM dongle

Using device 0: ezcap USB 2.0 DVB-T/DAB/FM dongle
usb_open error -3
Failed to open rtlsdr device #0

Any suggestions?

I installed GNURadio as packaged by my distribution, and I did the
"cmake; make; sudo make install" that I found, and I got the symptoms
you described. The problem I had is that packaged software normally
gets installed into /usr and the "cmake, etc" procedure installs it's
software into /usr/local. That meant that grc was looking in the wrong
place to find the gr-osmosdr bits.

Telling cmake to install the software into /usr fixed my problem. Could
it possibly fix yours?