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Re: [Discuss-gnuradio] First proper build - missing blocks

From: Martin Braun (CEL)
Subject: Re: [Discuss-gnuradio] First proper build - missing blocks
Date: Mon, 28 Oct 2013 14:55:43 +0100
User-agent: Mutt/1.5.21 (2010-09-15)

On Mon, Oct 28, 2013 at 12:29:31PM -0000, address@hidden wrote:
> Sorry but this is a very newbie question. I tried to get GR up and running
> many years ago when Fedora 8 was new! I then tried a couple of times to get
> it going on windows - I got some blocks up but could not move or connect
> then. I have now just installed Ubuntu 13.10 on an old laptop to have a
> proper go at getting GR up and running as I now have some time to try and
> play properly.
> I went with the simplest looking way of doing GR3.7.1 with
> $ sudo apt-get install gnuradio
> but ended up with 205 warnings and a load of errors.

You got errors when running apt-get install gnuradio? Can you please
pastebin them somewhere?

In general, you can and should use apt-get install if the version you
get is "new enough" for your taste.

> I tried this a couple of times with same result.
> I then tried to remove as much of this as I could and went down this road
> $ git clone http://git.gnuradio.org/git/gnuradio.git
> $ ./build-gnuradio

FYI: build_gnuradio does the cloning for you.

> And this seemed to work OK. No warnings, no errors.
> Some time later I managed to get gnuradio-companion (can I still call it
> grc?) up and running and tried to get the Dial Tone example built.

You can't call it grc on the command line (there was a package conflict
a while back).

> First thing - no Signal Source block. The only source blocks I have in Audio
> is Audio Source and Wav File Source, no Signal Source.
> I then tried to load up rtl2832-cfile.grc and ended with multiple
> >>>> Error: Block key "gr_file_source" not found in Platform - grc ...
> Other blocks not found included gr_uchar_to_float, gr_add_const_vxx,
> gr_multiply_const_vxx, gr_float_to_complex stc.

It seems like you're trying to import a really old flow graph. All of
these blocks have been moved to a new sub-component (in this case,

When you start GRC, you can find all of these blocks in the sidebar.
This way, you should be able to reconstruct your flow graph in no time.


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

Dipl.-Ing. Martin Braun
Research Associate

Kaiserstra├če 12
Building 05.01
76131 Karlsruhe

Phone: +49 721 608-43790
Fax: +49 721 608-46071

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

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