Experimental Physics and
Industrial Control System

Torsten Bögershausen via Tech-talk <tech-talk at aps.anl.gov> · Mon, 27 Mar 2023 14:13:49 +0200

Hej Erwann,
I am not sure, if I understand you question.
Are you running under arm ?
And only find a lib for x86_64 (or so)

If yes:
You can compile EPICS base under arm, and the point out PYEPICS_LIBCA similar to this:
export PYEPICS_LIBCA=$EPICS_BASE/lib/$EPICS_HOST_ARCH/libca.dylib
(Obs: This is for Mac, under Linux it is probably xxx/yyy/libca.so )

HTH
/Torsten

> On 27 Mar 2023, at 13:57, LE-DANIEL Erwann via Tech-talk <tech-talk at aps.anl.gov> wrote:
> 
> Hello,
>  
> I tried hard to understand why pyepics doesn’t work on my odroid C4.
> I installed python version 3.8 and last pyepics version3.5.1
>  
> Unfortunately, when I start python and after writing :
>  
> import epics
> pv=epics.PV('VARIABLE')
>  
> The return was :
>  
> /home/odroid/.local/lib/python3.8/site-packages/epics/clibs/linux64/libca.so: cannot open shared object file: No such file or directory
>  
> But in reality, the file is in the linux64 folder : /home/odroid/.local/lib/python3.8/site-packages/epics/clibs/linux64/
>  
> I read in the page Downloading and Installation — Epics Channel Access for Python (uchicago.edu) that “ If these provided versions of libca do not work for you, please let us know. “ ..
> Where can I find other libca versions ?
>  
> Many thanks.
>  
> My environment : Ubuntu mate 20.0, python 3.8 , pyepics 3.5.1, cpu archi aarch64, hardware : odroid C4.
>  
> Erwann.
> 
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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System