Cross compiling Gnu Radio for Openwrt
===

I'm attempting to install Gnu Radio on OpenWRT "Attittude Adjustment" (latest trunk sources). I've cross compiled GR and everything seems to have compiled and linked just fine. However, importing the module in Python results in the following: 

    root@OpenWrt:/usr/lib/python2.7/dist-packages/gnuradio/gr# python
    Python 2.7.3 (default, Jul 21 2012, 17:36:54) 
    [GCC 4.6.3 20120201 (prerelease)] on linux2
    Type "help", "copyright", "credits" or "license" for more information.
    >>> from gnuradio import gr
    Traceback (most recent call last):
      File "<stdin>", line 1, in <module>
      File "/usr/lib/python2.7/dist-packages/gnuradio/gr/__init__.py", line 43, in <module>
        from gnuradio_core import *
      File "/usr/lib/python2.7/dist-packages/gnuradio/gr/gnuradio_core.py", line 23, in <module>
        from gnuradio_core_runtime import *
      File "/usr/lib/python2.7/dist-packages/gnuradio/gr/gnuradio_core_runtime.py", line 26, in <module>
        _gnuradio_core_runtime = swig_import_helper()
      File "/usr/lib/python2.7/dist-packages/gnuradio/gr/gnuradio_core_runtime.py", line 22, in swig_import_helper
        _mod = imp.load_module('_gnuradio_core_runtime', fp, pathname, description)
    ImportError: File not found
    >>> 

Note that Python has been invoked in the directory containing the SWIG library. Here is `ldd _gnuradio_core_runtime.so`, running on the **target** system: 

    checking sub-depends for '/usr/lib/libgnuradio-core-3.6.2git.so.0.0.0'
    checking sub-depends for '/usr/lib/libgruel-3.6.2git.so.0.0.0'
    checking sub-depends for '/usr/lib/libboost_date_time.so.1.49.0'
    checking sub-depends for '/usr/lib/libboost_program_options.so.1.49.0'
    checking sub-depends for '/usr/lib/libboost_filesystem.so.1.49.0'
    checking sub-depends for '/usr/lib/libboost_system.so.1.49.0'
    checking sub-depends for '/usr/lib/libboost_thread.so.1.49.0'
    checking sub-depends for '/lib/libpthread.so.0'
    checking sub-depends for '/usr/lib/libstdc++.so.6'
    checking sub-depends for '/lib/libm.so.0'
    checking sub-depends for '/lib/libgcc_s.so.1'
    checking sub-depends for '/lib/libc.so.0'
    checking sub-depends for '/usr/lib/libfftw3f.so.3'
    checking sub-depends for 'not found'
    checking sub-depends for '/lib/librt.so.0'
    checking sub-depends for '/usr/lib/libvolk.so.0.0.0'
    checking sub-depends for '/lib/libdl.so.0'
	    libgnuradio-core-3.6.2git.so.0.0.0 => /usr/lib/libgnuradio-core-3.6.2git.so.0.0.0 (0x00000000)
	    libgruel-3.6.2git.so.0.0.0 => /usr/lib/libgruel-3.6.2git.so.0.0.0 (0x00000000)
	    libboost_date_time.so.1.49.0 => /usr/lib/libboost_date_time.so.1.49.0 (0x00000000)
	    libboost_program_options.so.1.49.0 => /usr/lib/libboost_program_options.so.1.49.0 (0x00000000)
	    libboost_filesystem.so.1.49.0 => /usr/lib/libboost_filesystem.so.1.49.0 (0x00000000)
	    libboost_system.so.1.49.0 => /usr/lib/libboost_system.so.1.49.0 (0x00000000)
	    libboost_thread.so.1.49.0 => /usr/lib/libboost_thread.so.1.49.0 (0x00000000)
	    libpthread.so.0 => /lib/libpthread.so.0 (0x00000000)
	    libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x00000000)
	    libm.so.0 => /lib/libm.so.0 (0x00000000)
	    libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x00000000)
	    libc.so.0 => /lib/libc.so.0 (0x00000000)
	    libfftw3f.so.3 => /usr/lib/libfftw3f.so.3 (0x00000000)
	    libfftw3f_threads.so.3 => not found (0x00000000)
	    librt.so.0 => /lib/librt.so.0 (0x00000000)
	    libvolk.so.0.0.0 => /usr/lib/libvolk.so.0.0.0 (0x00000000)
	    libdl.so.0 => /lib/libdl.so.0 (0x00000000)
	    ld-uClibc.so.0 => ld-uClibc.so.0 (0x00000000)

Here is the output of `file _gnuradio_core_runtime.so` on the **build** system: 
    
    _gnuradio_core_runtime.so: ELF 32-bit LSB shared object, Intel 80386, version 1 (SYSV), dynamically linked, not stripped

The target system runs on an Intel Atom. Finally, the last piece of useful information I can think of is that `PYTHONPATH` is set to `/usr/lib/python2.7/dist-packages`. I'm at a loss as to what the problem is. I hope the wonderful stack overflow community may help find a solution. Thank you in advance for any pointers!

