Dear Douglas, Thank you for your answer.
Unfortunately, I couldn't find other modules and projects that use gr-dvbt in their codes. Thus, I feel sort of being frustrated :( Or maybe I can handle it if you give me some details about CMakeLists. As you know, there are a number of CmakeLists in the project. Can it be done by modifying and fixing CMakeLists.txt under swig, python or project root directory? As I am searching the web and archives, I've just found [this thread]( http://lists.gnu.org/archive/html/discuss-gnuradio/2013-12/msg00223.html). Though I've not read carefully it yet and it's been two years since that thread was posted, I think it might be relevant with my case. If you have any better suggestions, I will be very thankful to it. Also, I will report my progress as soon as possible. Regards, Jeon. 2015-03-31 0:22 GMT+09:00 Anderson, Douglas J. <[email protected]>: > Jeon, > > I've recently dealt with a similar problem. Chances are that if things > are building and installing correctly but the error is in the SWIG import, > the actual problem lies in your CMakeLists.txt... seems like the C++ linker > is being smart enough to get things linked correctly but SWIG needs you to > be a bit more explicit. > > Is there another project that includes Reed-Solomon that you can > reference? See what changes they made to their CMakesLists.txt to get SWIG > to be happy. > > -Doug > ------------------------------ > *From:* [email protected] > [[email protected]] on behalf of > Jeon [[email protected]] > *Sent:* Sunday, March 29, 2015 10:25 PM > *To:* Discuss GNU Radio mailing list > *Subject:* [Discuss-gnuradio] Swig and python import problem due to other > out-of-tree modules used in my out-of-tree module > > I've asked this question before. But there are lots of ambiguity and > uncertainty. Thus, this is the clarification. > > I am using Reed-Solomon En/decoder in my own OOT module sources. The > Reed-Solomon en/decoder are implemented in [gr-dvbt]( > https://github.com/BogdanDIA/gr-dvbt). > > Important codes are: > > [include/reed_solomon.h]( > https://github.com/BogdanDIA/gr-dvbt/blob/master/include/dvbt/reed_solomon.h > ) > [include/reed_solomon_enc.h]( > https://github.com/BogdanDIA/gr-dvbt/blob/master/include/dvbt/reed_solomon_enc.h > ) > [lib/reed_solomon.cc]( > https://github.com/BogdanDIA/gr-dvbt/blob/master/lib/reed_solomon.cc) > [lib/reed_solomon_end_impl.h]( > https://github.com/BogdanDIA/gr-dvbt/blob/master/lib/reed_solomon_enc_impl.h > ) > [lib/reed_solomon_end_impl.cc]( > https://github.com/BogdanDIA/gr-dvbt/blob/master/lib/reed_solomon_enc_impl.cc > ) > > I've built and installed my module. But when I import my module in Python > for tests, error occurs: > > >>> import myOOTmodule > Traceback (most recent call last): > File "<stdin>", line 1, in <module> > File > "/usr/local/lib/python2.7/dist-packages/myOOTmodule/__init__.py", line 51, > in <module> > from myOOTmodule_swig import * > File > "/usr/local/lib/python2.7/dist-packages/myOOTmodule/myOOTmodule_swig.py", > line 28, in <module> > _myOOTmodule_swig = swig_import_helper() > File > "/usr/local/lib/python2.7/dist-packages/myOOTmodule/myOOTmodule_swig.py", > line 24, in swig_import_helper > _mod = imp.load_module('_myOOTmodule_swig', fp, pathname, > description) > ImportError: /usr/local/lib/libgnuradio-myOOTmodule.so: undefined > symbol: _ZN2gr4dvbt12reed_solomonC1Eiiiiiiii > > You can also see the error above in [gist]( > https://gist.github.com/gsongsong/e07883959f6a339b5d78) > > The problem is that the above error occurs since I am using > gr:dvbt::reed_solomon, which is neither in GNU Radio source tree nor in my > module. > > I don't know the exact reason for this. But in my guess... > It seems that myOOTmodule thinks gr::dvbt::reed_solomon is a part of > myOOTmodule itself. But there is no declaration and implementation and it > causes the error. > Or myOOTmodule has no idea where to import gr:dvbt:reed_solomon. > > Another hypothesis is that, an OOT module cannot use other OOT modules > (in swig-python?). I'm not sure about it. Or, there is a way to do this, > but I just don't know about it. > > Regards, > Jeon. >
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