Re: issues porting C++ OOT to 3.9 - fails at runtime import

[Tom McDermott]

I built a new VM from zero.  Ubuntu 20.04

apt install build-essential

apt install git

apt install cmake

apt install python3-pip

pip3 install pygccxml

build, install pybind11 from 2.4.3 tarball

setup gnuradio repository to releases

apt install gnuradio

   This gives gnuradio 3.9.1.0

git-cloning both Ron's gr-iqlevels and my gr-hpsdr, going through cmake, make, sudo make install, sudo ldconfig

yields exactly the same results as before:  the gr:sync_block  (gr-iqlevels)  or the gr::block (gr-hpsdr)  are not imported.

-- Tom, N5EG

On Sun, May 9, 2021 at 11:44 AM Tom McDermott <tom.n5eg@gmail.com> wrote:

Hi Ron - thank you for sending me the link to your 3.9 gr-iqlevels module !

It builds and installs OK, but when trying to run it gives me the same type of error as my own module:

Note: cmake .. -DCMAKE_INSTALL_PREFIX=/usr   was used for for gr-iqlevels

$ python3
Python 3.8.5 (default, Jan 27 2021, 15:41:15)
[GCC 9.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import gnuradio
>>> import iqlevels
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3/dist-packages/iqlevels/__init__.py", line 18, in <module>
    from .iqlevels_python import *
ImportError: generic_type: type "iqlevels" referenced unknown base type "gr::sync_block"
>>>

And when run from GRC:

Traceback (most recent call last):
  File "/home/tom/Desktop/iqlevels.py", line 142, in <module>
    main()
  File "/home/tom/Desktop/iqlevels.py", line 120, in main
    tb = top_block_cls()
  File "/home/tom/Desktop/iqlevels.py", line 81, in __init__
    self.iqlevels_iqlevels_0 = iqlevels.iqlevels(samp_rate, 1)
AttributeError: type object 'iqlevels' has no attribute 'iqlevels'

So it appears there is something wrong or misconfigured in my system.

I am baffled as to what that might be.

 

Ubuntu 20.04

Gnuradio 3.9.0.0

Python 3.8.5

Cmake 3.16.3

GCC 9.3.0

pygccxml  2.1.0  installed using pip3

pybind11-2.4.3 installed from tarball according to the OOT 3.9 instructions

  pybind11 build, cmake, make, make install by the above directions.

   it put the various pybind headers into /usr/local/include/pybind11/

Is there some other configuration, path, or other thing that needs to be setup?

-- Tom, N5EG