# Using gr-atsc library **URL:** \ **Category:** GNU Radio\ **Created:** [November 16, 2013, 4:23pm UTC](https://www.ruby-forum.com/t/using-gr-atsc-library/237507 "2013-11-16T16:23:06Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![musicdenotation](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/ea666f/32.png) [@musicdenotation](https://www.ruby-forum.com/u/musicdenotation)\ **Post date:** [November 16, 2013, 4:23pm UTC](https://www.ruby-forum.com/t/using-gr-atsc-library/237507/1 "2013-11-16T16:23:06Z")
Hi, My name is Yuri and I’m new to the GNU Radio “world”. I’m trying to use some pieces of the code from the gr-atsc librabry in my project, for latter adaptation to my purpose, but I don’t know if what I’m doing is correct (I suspect not), so any tip and hint would be of great help. I’m trying to use it in GRC. The file is attached. I did the installation using gr\_modtool, but I attached the other libraries I thought useful manually (copy and paste). The installation occurs without problems, but when I run it, I got the following errors: Generating: “/home/aluno/teste\_RS.py” Generating: “/home/aluno/teste\_RS.py” Executing: “/home/aluno/teste\_RS.py” Traceback (most recent call last): File “/home/aluno/teste\_RS.py”, line 17, in import meusBlocos File “/usr/local/lib/python2.7/dist-packages/meusBlocos/ **init**.py”, line 45, in from meusBlocos\_swig import \* File “/usr/local/lib/python2.7/dist-packages/meusBlocos/meusBlocos\_swig.py”, line 26, in \_meusBlocos\_swig = swig\_import\_helper() File “/usr/local/lib/python2.7/dist-packages/meusBlocos/meusBlocos\_swig.py”, line 22, in swig\_import\_helper \_mod = imp.load\_module(‘\_meusBlocos\_swig’, fp, pathname, description) ImportError: /usr/local/lib/libgnuradio-meusBlocos.so: undefined symbol: \_ZN18atsci\_reed\_solomonD1Ev I tried to follow the advices from this link, but without success: [http://lists.gnu.org/archive/html/discuss-gnuradio/2013-09/msg00316.html](http://lists.gnu.org/archive/html/discuss-gnuradio/2013-09/msg00316.html) Thank you very much. Yuri PM. ---
**Author:** ![Yuri\_P.M](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/y/ea5d25/32.png) [@Yuri\_P.M](https://www.ruby-forum.com/u/Yuri_P.M)\ **Post date:** [November 20, 2013, 1:30am UTC](https://www.ruby-forum.com/t/using-gr-atsc-library/237507/2 "2013-11-20T01:30:31Z")
Hi Yuri, I’m also fairly new but I can offer a suggestion. When you create a new OOT module, the gr\_modtool does a couple of things mainly create some files and edit your CMakeLists and your meusBlocos.i. You already edited CMakeLists so now try to edit the meusBlocos.i in your swig folder to include your outside library. It’s just a guess so let us know if it works! AM KC3BBL ---
**Author:** ![Yuri\_P.M](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/y/ea5d25/32.png) [@Yuri\_P.M](https://www.ruby-forum.com/u/Yuri_P.M)\ **Post date:** [November 18, 2013, 12:44pm UTC](https://www.ruby-forum.com/t/using-gr-atsc-library/237507/3 "2013-11-18T12:44:47Z")
On Sat, Nov 16, 2013 at 01:21:20PM -0200, Yuri P.M wrote: > Hi, > > My name is Yuri and I’m new to the GNU Radio “world”. I’m trying to use some > pieces of the code from the gr-atsc librabry in my project, for latter > adaptation to my purpose, but I don’t know if what I’m doing is correct (I > suspect not), so any tip and hint would be of great help. I’m trying to use it > in GRC. Can you please specify how you installed GNU Radio? My first thought is that maybe your OOT-module is not configured link against gr-atsc. In your modules top CMakeFile.txt, look for lines that look like this: set(GR\_REQUIRED\_COMPONENTS RUNTIME ATSC) find\_package(Gnuradio “3.7.2” REQUIRED) …and make sure the ‘ATSC’ is in there. MB – Karlsruhe Institute of Technology (KIT) Communications Engineering Lab (CEL) Dipl.-Ing. Martin B. Research Associate Kaiserstraße 12 Building 05.01 76131 Karlsruhe Phone: +49 721 608-43790 Fax: +49 721 608-46071 www.cel.kit.edu KIT – University of the State of Baden-Württemberg and National Laboratory of the Helmholtz Association ---
**Author:** ![Yuri\_P.M](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/y/ea5d25/32.png) [@Yuri\_P.M](https://www.ruby-forum.com/u/Yuri_P.M)\ **Post date:** [November 24, 2013, 3:15pm UTC](https://www.ruby-forum.com/t/using-gr-atsc-library/237507/4 "2013-11-24T15:15:17Z")
Hi Mr. Muniz, Thanks for the help and the tips. After the changes suggested by Mr. Braun, I’ve tried to add the lines of code in the file meusBlocos\_swig.i you suggested (in the /swig folder) as the file attached. I did these modifications as suggested in the topic that I mentioned in my first question: [http://lists.gnu.org/archive/html/discuss-gnuradio/2013-09/msg00316.html](http://lists.gnu.org/archive/html/discuss-gnuradio/2013-09/msg00316.html) But then I got these errors: /home/aluno/Public/meusBlocos/ gr-meusBlocos/include/meusBlocos/rs\_encoder.h:33: Error: Syntax error in input(1). make[2]: \*\*\* [swig/meusBlocos\_swigPYTHON\_wrap.cxx] Error 1 make[1]: \*\*\* [swig/CMakeFiles/\_meusBlocos\_swig.dir/all] Error 2 make: \*\*\* [all] Error 2 I will try to find out what they mean. Again, thanks for the help and the consideration. ---
**Author:** ![Yuri\_P.M](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/y/ea5d25/32.png) [@Yuri\_P.M](https://www.ruby-forum.com/u/Yuri_P.M)\ **Post date:** [November 20, 2013, 1:08am UTC](https://www.ruby-forum.com/t/using-gr-atsc-library/237507/5 "2013-11-20T01:08:53Z")
Hello Mr. Braun, Thank you for the attention and the assistance. I have installed it by the repositories, right now I’m using the 3.7.1 version (I am using a virtual machine VM Ware, and the distribution is Ubuntu 12.04.3 64 bits, running in a Intel core i7 processor) I’ve tried to include this line of code that you told me, but I still get the same error messages. First I included it in the CMakeList.txt in the top module of the directory where the files are included, the n I’ve included it in all the other CMakeLists that have lines that look like that, but in both situations I get the same error. Thank you again.