Re: gr-display "import display" causes error

You should have used:

cmake -DCMAKE_INSTALL_PREFIX=/usr

You should also use that for any OOT you install.

Ron

On 11/20/24 11:50, Elmore Family wrote:
> Marcus,
>
> I have discovered I made two errors in this process which may be
> contributing to this issue. However, here is what I have done and the
> results.
>
> I followed the procedure that Volker outlined in the README from his
> Github project.
>
> cmake -DCMAKE_INSTALL_PREFIX=/usr/bin is executed from the build
> directory where I stored the gr-display files. /usr/bin is the
> directory where gnuradio is installed. I assumed this directory to be
> correct since it contains gnuradio- companion.  Volker states:
> **Hint:**
> You can install gr-display to an other directory than gnuradio. But
> then you have to add
> the location of your python modules to the PYTHONPATH environment
> variable and add the location of
> the lib to the LD_LIBRARY_PATH environment variable.
>
> Since I installed gr-display to the directory containing gnuradio (I
> think) I understood from the above hint that I didn't need to touch
> the environment variables.
>
> I then performed "make" and "sudo make install" .
>
> The gr-display OOT is now in gnuradio and was included in the flowchart.
>
> Also, the README has the following:
> To see the newly created blocks in grc you have to set the
> local_blocks_path entry in ~/.gnuradio/config.conf.
> Example: If you choose /usr/local/oot as installation directory, you
> have to set
> local_blocks_path = /usr/local/oot/share/gnuradio/grc/blocks
>
> I didn't do this since the OOT was installed in grc. Should I do this?
>
> When I run the flowchart, I get the error shown in my original posting.
>
> "libgnuradio-display..." is installed in
> "/usr/bin/lib/aarch64-linux-gnu" and also
> in"/usr/local/lib/aarch64-linux-gnu". The install_manifest.txt shows
> installation in the  "/usr/bin/lib/aarch64-linux-gnu" directory. I
> checked the /usr/local since you had mentioned it.
>
> So, the file is in 2 locations??? Is this the problem? Did I choose an
> incorrect directory for the gnuradio location? BTW if I run
> "gnuradio-config-info --prefix", the result is "/usr/".
>
> Jim
>
> -----Original Message----- From: Marcus Müller
> Sent: Wednesday, November 20, 2024 7:52 AM
> To: discuss-gnuradio@gnu.org ; Elmore's
> Subject: Re: gr-display "import display" causes error
>
> Hi Jim,
>
> sounds like you have a local installation of gr-display (in
> /usr/local) and the python
> part can't find the underlying compiled C++ library. Can you check where
> "libgnuradio-display…" has been installed to (since you probably
> compiled this yourself,
> there might be a `install_manifest.txt` in your build folder). That
> directory (something
> like /usr/local/lib64 maybe?) needs to be in the LD_LIBRARY_PATH
> environment variable for
> the automatic Linux library finder to be able to find it :)
>
> Best regards,
> Marcus
>
> On 16.11.24 02:43, Elmore Family wrote:
>> I have installed gr-display and added it to my flowgraph. When I run
>> the flowgraph I get the following:
>> Traceback (most recent call last):
>>    File "/home/wa4ywm/Softrock/Softrock_FT8.py", line 26, in <module>
>>      import display
>>    File
>> "/usr/local/lib/python3.11/dist-packages/display/__init__.py", line
>> 22, in <module>
>>      from .display_python import *
>> ImportError: libgnuradio-display.so.3.10.0: cannot open shared object
>> file: No such file or directory
>> Note that when I performed the build I used the instructions in the
>> README file. The "cmake –DCMAKE_INSTALL_PREFIX = " failed. So I used
>> cmake ../ to build the OOT.
>> Thanks for any help.
>> Jim
>