I am having the same issue, I tried Josh suggestion without success.
I have installed Extras and pre-cog using:
https://github.com/jmalsbury/pre-cog/wiki/Installation
what should I do to make it work?
here is a error log containing the versions I am using:
linux; GNU C++ version 4.6.3; Boost_104800; UHD_003.005.003-78-g49a4929b
<<< Welcome to GNU Radio Companion 3.6.4.1 >>>
Loading: "/home/guy/Documents/tdma_hier.grc"
>>> Done
Showing: "/home/guy/Documents/tdma_hier.grc"
Loading: "/home/guy/Documents/tdma_radio.grc"
>>> Done
Showing: "/home/guy/Documents/tdma_radio.grc"
Generating: "/home/guy/Documents/tdma_radio.py"
>>> Warning: This flow graph may not have flow control: no audio or usrp
blocks found. Add a Misc->Throttle block to your flow graph to avoid CPU
congestion.
Executing: "/home/guy/Documents/tdma_radio.py"
linux; GNU C++ version 4.6.3; Boost_104800; UHD_003.005.003-78-g49a4929b
Traceback (most recent call last):
File "/home/guy/Documents/tdma_radio.py", line 8, in <module>
execfile("/home/guy/.grc_gnuradio/tdma_hier.py")
File "/home/guy/.grc_gnuradio/tdma_hier.py", line 14, in <module>
import gnuradio.extras as gr_extras
File
"/usr/local/lib/python2.7/dist-packages/gnuradio/extras/__init__.py", line
20, in <module>
from extras_swig import *
File
"/usr/local/lib/python2.7/dist-packages/gnuradio/extras/extras_swig.py",
line 26, in <module>
_extras_swig = swig_import_helper()
File
"/usr/local/lib/python2.7/dist-packages/gnuradio/extras/extras_swig.py",
line 22, in swig_import_helper
_mod = imp.load_module('_extras_swig', fp, pathname, description)
ImportError: libgnuradio-extras.so: cannot open shared object file: No such
file or directory
Thanks, Guy
On Wed, Feb 20, 2013 at 8:22 PM, Alex Zhang <[email protected]> wrote:
> Maybe it is due to my own building which is very obsolete. I will try to
> reinstall the latest version of gnuradio and grextras.
>
>
> On Tue, Feb 19, 2013 at 5:35 PM, Alex Zhang <[email protected]>wrote:
>
>> It does not work after the modification and rebuilding of the grextras.
>>
>> My modification:
>>
>> diff --git a/swig/CMakeLists.txt b/swig/CMakeLists.txt
>> index 129d789..42732a3 100644
>> --- a/swig/CMakeLists.txt
>> +++ b/swig/CMakeLists.txt
>> @@ -58,7 +58,7 @@ foreach(incdir ${GRUEL_INCLUDE_DIRS})
>> list(APPEND GR_SWIG_INCLUDE_DIRS ${incdir}/gruel/swig)
>> endforeach(incdir)
>>
>> -set(GR_SWIG_LIBRARIES gnuradio-extras)
>> +list(APPEND GR_SWIG_LIBRARIES gnuradio-extras ${GNURADIO_CORE_LIBRARIES}
>> ${G
>> set(GR_SWIG_DOC_FILE ${CMAKE_CURRENT_BINARY_DIR}/extras_swig_doc.i)
>> set(GR_SWIG_DOC_DIRS
>> ${CMAKE_CURRENT_SOURCE_DIR}/../include/gnuradio/extras)
>>
>>
>> On Tue, Feb 19, 2013 at 5:06 PM, Josh Blum <[email protected]> wrote:
>>
>>>
>>>
>>> On 02/19/2013 04:59 PM, Alex Zhang wrote:
>>> > Hi,
>>> >
>>> > I believe some other guys met this problem before, but I did not find
>>> the
>>> > final solution expressed clearly.
>>> >
>>> > After I installed the gnuradio, grextras, then in my python code which
>>> trys
>>> > to import the extras_swig like
>>> >
>>> > import gnuradio.extras as gr_extras
>>> > File
>>> > "/usr/local/lib/python2.7/dist-packages/gnuradio/extras/__init__.py",
>>> line
>>> > 20, in <module>
>>> > from extras_swig import *
>>> > File
>>> >
>>> "/usr/local/lib/python2.7/dist-packages/gnuradio/extras/extras_swig.py",
>>> > line 26, in <module>
>>> > _extras_swig = swig_import_helper()
>>> > File
>>> >
>>> "/usr/local/lib/python2.7/dist-packages/gnuradio/extras/extras_swig.py",
>>> > line 22, in swig_import_helper
>>> > _mod = imp.load_module('_extras_swig', fp, pathname, description)
>>> > ImportError: /usr/local/lib/libgnuradio-extras.so: undefined symbol:
>>> > _ZN15gr_msg_accepter4postEN5boost13intrusive_ptrIN3pmt8pmt_baseEEES4_
>>> >
>>> >
>>> > Can any one shed a light on it?
>>>
>>> Maybe its missing a library to link w/
>>>
>>> Can you try this and let me know?
>>>
>>> http://pastebin.com/t5GL5Z6G
>>>
>>> -josh
>>> >
>>> >
>>> >
>>> > _______________________________________________
>>> > Discuss-gnuradio mailing list
>>> > [email protected]
>>> > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>>> >
>>>
>>> _______________________________________________
>>> Discuss-gnuradio mailing list
>>> [email protected]
>>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>>>
>>
>>
>>
>> --
>>
>> Alex,
>> *Dreams can come true – just believe.*
>>
>
>
>
> --
>
> Alex,
> *Dreams can come true – just believe.*
>
> _______________________________________________
> Discuss-gnuradio mailing list
> [email protected]
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
>
>
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