Looking for insight into gr-iio for plutosdr

[Chris Gorman]

Hello All,

I am trying to install gr-iio to build the needed libraries for a
plutosdr.  I have a slightly unique situation in that I am running on
a linux from scratch machine and as a result uses shared libraries
when possible.  I have followed the instructions on
https://wiki.analog.com/resources/tools-software/linux-software/gnuradio
, except I am using the upgrade-3.8 branch of gr-iio.  In order to get
cmake to run, I need to pass -DBUILD_SHARED_LIBS=ON to cmake.  This
causes a small problem with the resulting binaries.  When I try to
load them I get errors.  A simple import of iio in Python causes a
segfault.

Python 3.7.4 (default, Dec 21 2019, 10:53:28)
[GCC 9.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import iio
Fatal Python error: Segmentation fault

Current thread 0x00007fbf14c7a740 (most recent call first):
  File "<frozen importlib._bootstrap>", line 219 in _call_with_frames_removed
  File "<frozen importlib._bootstrap_external>", line 1043 in create_module
  File "<frozen importlib._bootstrap>", line 583 in module_from_spec
  File "<frozen importlib._bootstrap>", line 670 in _load_unlocked
  File "<frozen importlib._bootstrap>", line 967 in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 983 in _find_and_load
  File "<frozen importlib._bootstrap>", line 219 in _call_with_frames_removed
  File "<frozen importlib._bootstrap>", line 1035 in _handle_fromlist
  File "/opt/gnuradio/lib/python3.7/dist-packages/iio/iio_swig.py",
line 13 in <module>
  File "<frozen importlib._bootstrap>", line 219 in _call_with_frames_removed
  File "<frozen importlib._bootstrap_external>", line 728 in exec_module
  File "<frozen importlib._bootstrap>", line 677 in _load_unlocked
  File "<frozen importlib._bootstrap>", line 967 in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 983 in _find_and_load
  File "/opt/gnuradio/lib/python3.7/dist-packages/iio/__init__.py",
line 36 in <module>
  File "<frozen importlib._bootstrap>", line 219 in _call_with_frames_removed
  File "<frozen importlib._bootstrap_external>", line 728 in exec_module
  File "<frozen importlib._bootstrap>", line 677 in _load_unlocked
  File "<frozen importlib._bootstrap>", line 967 in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 983 in _find_and_load
  File "<stdin>", line 1 in <module>
Segmentation fault

When I try to run iio_swig.py from within gdb I get an error
indicating that linking has gone wrong somehow.

(gdb) run /opt/gnuradio/lib/python3.7/dist-packages/iio/iio_swig.py
Starting program: /usr/bin/python3
/opt/gnuradio/lib/python3.7/dist-packages/iio/iio_swig.py
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/libthread_db.so.1".
Traceback (most recent call last):
  File "/opt/gnuradio/lib/python3.7/dist-packages/iio/iio_swig.py",
line 15, in <module>
    import _iio_swig
ImportError: /opt/gnuradio/lib/libgnuradio-iio.so...: undefined
symbol: _ZN5boost6chrono12steady_clock3nowEv
[Inferior 1 (process 10709) exited with code 01

_ZN5boost6chrono12setady_clock3nowEv exists in
/usr/lib/libboost_chrono.so , but that library is not used by gr-iio
as far as I can see.  (I can't find
_ZN5boost6chrono12setady_clock3nowEv in any of the requested
libraries: date_time; program_options; filesystem; system; regex;
thread; unit_test_framework.)

I'm attaching my build.log in case the fix can be found by perusing
it.  (It hasn't helped me yet.)  Any ideas on how to fix my problem
would be appreciated.

Thanks in advance.

Chris

build.log.gz
Description: application/gzip