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<== Date ==> <== Thread ==>
Subject: Re: undefined reference to symbol 'pvar_dset_asynInt32ArrayWfIn'
From: Mark Rivers via Tech-talk <tech-talk at aps.anl.gov>
To: "tech-talk at aps.anl.gov" <tech-talk at aps.anl.gov>, Peter Pitfield <pitfieldp at gmail.com>
Date: Wed, 27 Sep 2023 12:55:15 +0000
Hi Peter,

The EPICS LabJack module builds an IOC application called LabJackApp.  Have you successfully built that?  You can use that IOC and the LabJack/iocBoot/iocLabJack_Txxx directory to test your device and the EPICS support.

For building your own IOC you should use the one in LackJack as an example.  Your configure/RELEASE file needs to include busy and asyn like this one:

https://github.com/epics-modules/LabJack/blob/master/configure/RELEASE

You will probably also want to include autosave there.

Your application Makefile needs to include the _DBD and _LIBS lines for busy, asyn, and optionally autosave like this one:

https://github.com/epics-modules/LabJack/blob/master/LabJackApp/src/Makefile

Mark

From: Tech-talk <tech-talk-bounces at aps.anl.gov> on behalf of Peter Pitfield via Tech-talk <tech-talk at aps.anl.gov>
Sent: Tuesday, September 26, 2023 12:30 PM
To: tech-talk at aps.anl.gov <tech-talk at aps.anl.gov>
Subject: undefined reference to symbol 'pvar_dset_asynInt32ArrayWfIn'
 
Hello,
I am trying to use the labjack module, and I am receiving the error message in the subject line.
The complete error looks like this:
/usr/bin/g++ -o labjackIOC  -L/home/raphael/EPICS/IOCs/labjackIOC/lib/linux-x86_64 -L/home/raphael/EPICS/epics-base/lib/linux-x86_64 -L/home/raphael/EPICS/support/LabJack/lib/linux-x86_64 -Wl,-rpath,/home/raphael/EPICS/IOCs/labjackIOC/lib/linux-x86_64 -Wl,-rpath,/home/raphael/EPICS/epics-base/lib/linux-x86_64 -Wl,-rpath,/home/raphael/EPICS/support/LabJack/lib/linux-x86_64          -rdynamic -m64         labjackIOC_registerRecordDeviceDriver.o labjackIOCMain.o    -llabjackIOCSupport -lLabJack -lqsrv -lpvAccessIOC -lpvAccessCA -lpvAccess -lpvData -ldbRecStd -ldbCore -lca -lCom  
/usr/bin/ld: labjackIOC_registerRecordDeviceDriver.o: undefined reference to symbol 'pvar_dset_asynInt32ArrayWfIn'
/usr/bin/ld: /home/raphael/EPICS/support/asyn/lib/linux-x86_64/libasyn.so: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
make[3]: *** [/home/raphael/EPICS/epics-base/configure/RULES_BUILD:231: labjackIOC] Error 1
make[3]: Leaving directory '/home/raphael/EPICS/IOCs/labjackIOC/labjackIOCApp/src/O.linux-x86_64'
make[2]: *** [/home/raphael/EPICS/epics-base/configure/RULES_ARCHS:58: install.linux-x86_64] Error 2
make[2]: Leaving directory '/home/raphael/EPICS/IOCs/labjackIOC/labjackIOCApp/src'
make[1]: *** [/home/raphael/EPICS/epics-base/configure/RULES_DIRS:85: src.install] Error 2
make[1]: Leaving directory '/home/raphael/EPICS/IOCs/labjackIOC/labjackIOCApp'
make: *** [/home/raphael/EPICS/epics-base/configure/RULES_DIRS:85: labjackIOCApp.install] Error 2

Also, I do not know how to set up an IOC with the labjack module. I have checked the readme file in the module and the documentation it has a link to, but the setup instructions did not seem complete. I would like to know what, if anything, I might be missing.

Thank you so much,
Peter
References:
undefined reference to symbol 'pvar_dset_asynInt32ArrayWfIn' Peter Pitfield via Tech-talk
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