Experimental Physics and
Industrial Control System

"Wang Xiaoqiang \(PSI\) via Tech-talk" <tech-talk at aps.anl.gov> · Fri, 7 Oct 2022 17:15:33 +0000

Hi Ray,

I guess so. Most binary build of pcaspy are built against epics 3.
But in regards of PCAS module, no big differences since epics 3. 

It depends on where the binary version is from. It is very likely
to have the epics libraries statically linked, which is the default.
Check it with ldd command,
$ ldd _cas.cpython-310-x86_64-linux-gnu.so 
If no libCom in the output then it is statically linked.

Best
Xiaoqiang

> On 7 Oct 2022, at 18:35, Gregory, Ray <gregoryrd at ornl.gov> wrote:
> 
> Hi Xiaoqiang,
> 
> Thanks for the info.
> 
> Does this mean that I would need to build pcaspy from source to get it to use EPICS 7?
> 
> And that the binary version of pcaspy that I installed previously is using the version of EPICS I was using (what EPICS_BASE pointed to) when I installed it?
> 
> Thank you,
> 
> Ray
> 
> 
> Ray Gregory
> Oak Ridge National Laboratory
> 
> 
> -----Original Message-----
> From: Wang Xiaoqiang (PSI) <xiaoqiang.wang at psi.ch> 
> Sent: Friday, October 07, 2022 8:28 AM
> To: Gregory, Ray <gregoryrd at ornl.gov>
> Cc: tech-talk at aps.anl.gov
> Subject: [EXTERNAL] Re: point pcaspy to EPICS 7
> 
> 
> Hi Ray,
> 
> Here is the steps I use to build PCAS module together with EPICS base.
> hxxps://pcaspy.readthedocs.io/en/latest/installation.html#getting-epics
> 
> Best
> Xiaoqiang
> 
>> On 6 Oct 2022, at 20:19, Gregory, Ray via Tech-talk <tech-talk at aps.anl.gov> wrote:
>> 
>> Hi,
>> 
>> I have recently built EPICS 7 on a machine that I usually run IOCs with an older version of EPICS (EPICS 3.14.12.6 and EPICS 4.6). Some of these IOCs are Python IOCs that use pcaspy.
>> 
>> I would like to create a pcaspy-based IOC on this machine that uses the new EPICS 7 that I have built.
>> 
>> How do I point pcaspy to use the new EPICS 7?
>> 
>> Thanks,
>> 
>> Ray
>> 
>> Ray Gregory
>> Oak Ridge National Laboratory
> 
> 

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System