[Discuss-gnuradio] Compile/swig error

[Alex Young]

(I'm not sure if this got sent the first time, I apologize if I am 
repeating myself)


Hi,

for background info, I am running ubuntu 7.04.  my gnuradio code is 
laest development branch downloaded and installed about two weeks ago.  
I got it compiled and installed without any problems. 

however, i do have a problem now:  i have written a block that takes in 
two bytes and outputs three bytes, something i'm calling 
gr_interp_test_bb.  I've gotten the .cc, .h and .i files in 
/gnuradio-core/src/lib/general.  I have edited the general.i and 
Makefile.am  and inserted the names of my files at the appropriate places. 

When I run make and make install from /gnuradio-core/src/lib, i can not 
see any errors in the ouptut text.  however, i then run python from the 
command line, and enter "from gnuradio import gr" and this is what i get:

Traceback (most recent call last):
 File "<stdin>", line 1, in <module>
 File "/usr/local/lib/python2.5/site-packages/gnuradio/gr/__init__.py", 
line 27, in <module>
   from gnuradio_swig_python import *
 File 
"/usr/local/lib/python2.5/site-packages/gnuradio/gr/gnuradio_swig_python.py", 
line 23, in <module>
   from gnuradio_swig_py_runtime import *
 File 
"/usr/local/lib/python2.5/site-packages/gnuradio/gr/gnuradio_swig_py_runtime.py", 
line 6, in <module>
   import _gnuradio_swig_py_runtime
ImportError: /usr/local/lib/libgnuradio-core.so.0: undefined symbol: 
_ZTV17gr_interp_test_bb


I found something about adding "/usr/local/lib" to /etc/ld.so.conf, so i 
tried that and it didn't work. 

fwiw, my /etc/ld.so.conf now looks like:

include /etc/ld.so.conf.d/*.conf
/usr/local/lib
/usr/local/lib


any help, ideas, suggestions would be most appreciated.

Thanks,
Alex Young

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Alex Young
address@hidden <mailto:address@hidden>
Graduate Research Assistant
Center for Wireless Telecommunications
Virginia Tech
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