Re: Steps for installing any EPICS Device Support module

[Ralph Lange via Tech-talk <tech-talk at aps.anl.gov>]

Hi Eusebio,

On Fri, 22 Dec 2023 at 13:42, Eusebio Naif Al-Soliman Fuentes <eunaif at correo.ugr.es> wrote:

 

First, I have started by making the sampleIOC and adding to sampleIOCApp/src/Makefile the next line:

sampleIOC_LIBS += opcua

Then, in sampleIOCApp/src/xxxSupport.dbd I have added:

 

include "opcua.dbd"

 

Finally, in configure/RELEASE.local I have included the next path:

 

OPCUA = /home/eusebio/binaryOpcuaIoc

 

However, with this first approach I'm having the next error when I try to compile with 'make'.

That is a known bug in the "binary distribution" tars:

https://github.com/epics-modules/opcua/issues/150

I use the example application of the OPCUA module to create the binary distrib, and I took a shortcut that leads to the OPCUA library and .dbd not being properly installed. In the current form, the binary distrib tar works for the example IOC that it builds, but not as an independent support module.

Next time I touch the binary distribution builders, I will fix this. Sorry for the inconvenience.

Workaround 1: In the binary distribution module, copy libopcua.so.<nnn> and the softlink into the {TOP}/lib/linux-x86_64 directory and opcua.dbd into {TOP}/dbd.
At that point you should be able to use it as a support module.
If you run "make distclean" or "make uninstall" in the binary distrib, you will have to repeat this step.

Workaround 2: Don't use the binary distribution as a support module, but make a copy of it as your IOC application and extend it to add the reccaster.

Building the open62541 library and the OPCUA support module from sources would also work. Follow the instructions in the READMEs of the OPCUA module for that.

https://github.com/epics-modules/opcua/tree/master/devOpcuaSup/open62541

Note that you need to clone the current master to be able to do that.

Cheers,
~Ralph