Experimental Physics and
Industrial Control System

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<== Date ==>		<== Thread ==>

Subject:	Re: OPC UA build problem
From:	"Knap, Giles \(DLSLtd,RAL,LSCI\) via Tech-talk" <tech-talk at aps.anl.gov>
To:	EPICS Tech Talk <tech-talk at aps.anl.gov>, Ralph Lange <ralph.lange at gmx.de>
Date:	Fri, 26 Jan 2024 16:59:47 +0000

Hello Vivien, Ralph,

I have successfully built the opcua support module with the open62541 client library and made an IOC instance that connects to an Omron PLC.

I'm sharing the container I used to do this so you can see the build options and also immediately experiment with pre-built code. This is a Generic IOC as discussed in another thread but it has an example instance embedded in it. To use:

quick and dirty method:

docker run -it --rm --net host ghcr.io/epics-containers/ioc-opcua-linux-developer:2024.1.1
cd /epics/ioc
vim config/st.cmd and edit to your needs
./start.sh

the beautiful method:

git clone --recursive git at github.com:epics-containers/ioc-opcua.git
open the project in vscode
ctrl-shift-p reopen in container
open a vscode terminal
cd /epics/ioc
make
edit /epics/ioc/config/st.cmd to your needs
./start.sh

To read more about the epics-containers framework that built this and perhaps to make some IOC instances that use it see:

https://epics-containers.github.io/

Regards,

giles

From: Tech-talk <tech-talk-bounces at aps.anl.gov> on behalf of Ralph Lange via Tech-talk <tech-talk at aps.anl.gov>
Sent: 11 January 2024 08:04
To: EPICS Tech Talk <tech-talk at aps.anl.gov>
Subject: Re: OPC UA build problem

Dear Vivien,

On Wed, 10 Jan 2024 at 16:02, LORIOT Vivien via Tech-talk <tech-talk at aps.anl.gov> wrote:

c++ -D_GNU_SOURCE -D_DEFAULT_SOURCE          -D_X86_64_ -DUNIX -Dlinux      -O3   -Wall    -DEPICS_NO_CALLBACK -DHAS_XMLPARSER -std=c++11 -fdiagnostics-color=always -mtune=generic     -m64 -fPIC -I. -I../O.Common -I. -I. -I.. -I../../devOpcuaSup -I../../devOpcuaSup/open62541 -I../../include/compiler/gcc -I../../include/os/Linux -I../../include -I/nix/store/3jdcplbpdj2177csm7nbw3prjlaq1bdn-epics-base-7.0.7/include/compiler/gcc -I/nix/store/3jdcplbpdj2177csm7nbw3prjlaq1bdn-epics-base-7.0.7/include/os/Linux -I/nix/store/3jdcplbpdj2177csm7nbw3prjlaq1bdn-epics-base-7.0.7/include    -I../../devOpcuaSup/open62541 -I/usr/include/libxml2 -I/volatile/home/vl276037/Top/open62541-1.3.9/install/include    -c ../opcuaItemRecord.cpp

../opcuaItemRecord.cpp:186:6: warning: ‘rset’ is deprecated [-Wdeprecated-declarations]

186 | rset opcuaItemRSET = {

      |      ^~~~~~~~~~~~~

In file included from /nix/store/3jdcplbpdj2177csm7nbw3prjlaq1bdn-epics-base-7.0.7/include/dbBase.h:22,

                 from /nix/store/3jdcplbpdj2177csm7nbw3prjlaq1bdn-epics-base-7.0.7/include/dbAccess.h:20,

                 from ../opcuaItemRecord.cpp:19:

/nix/store/3jdcplbpdj2177csm7nbw3prjlaq1bdn-epics-base-7.0.7/include/recSup.h:89:21: note: declared here

   89 | typedef struct rset rset EPICS_DEPRECATED;

      |                     ^~~~

../opcuaItemRecord.cpp:190:20: error: invalid conversion from ‘long int (*)(dbCommon*, int)’ to ‘long int (*)()’ [-fpermissive]

190 |     RECSUPFUN_CAST(init_record),

      |                    ^~~~~~~~~~~

      |                    |

      |                    long int (*)(dbCommon*, int)

../opcuaItemRecord.cpp:43:31: note: in definition of macro ‘RECSUPFUN_CAST’

   43 | #    define RECSUPFUN_CAST(F) F

In the OPC UA Device Support module, CONFIG_SITE defines '-DUSE_TYPED_RSET' for C++ compilation. [1]

That definition is missing on the compile line you are showing above - it probably slipped your migration to the Nix build system.

In case you are supporting Secure OPC UA: Other users are having issues with recent Linuxes (new API of openssl) and the Open62541 release 1.3, which show as crashes when the IOC starts. If you get it working, I'd be interested to know the details of your setup.

Cheers,
~Ralph

[1] https://github.com/epics-modules/opcua/blob/8e3aa08b372931d5cb632927dac87316d318d943/configure/CONFIG_SITE#L93

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References:: OPC UA build problem LORIOT Vivien via Tech-talk; Re: OPC UA build problem Ralph Lange via Tech-talk

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ANJ, 26 Jan 2024

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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System