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MQSeries.net Forum IndexIBM MQ API SupportCobol client application linking failed with libmqmcb.so

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mqbee2016
PostPosted: Mon Apr 25, 2016 2:37 am Post subject: Cobol client application linking failed with libmqmcb.so Reply with quote

Newbie

Joined: 25 Apr 2016
Posts: 3

Hi,

As part of the MQ8 upgrade, we need to recompile and relink the old cobol client application which was referring to libmqmcs and libmqmcb libraries before.
Now as in MQ8, libmqmcs is deprecated and not advised to use, we have removed it while linking. But after that getting error:
symbol referencing error in libmqmcb.so


Kindly help.
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hughson
PostPosted: Tue May 03, 2016 12:46 am Post subject: Reply with quote

Shaman

Joined: 09 May 2013
Posts: 728
Location: Bay of Plenty, New Zealand

Can you supply some more detail? Your build commands, a bit more detail around the error etc.
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mqbee2016
PostPosted: Wed May 04, 2016 2:48 am Post subject: Reply with quote

Newbie

Joined: 25 Apr 2016
Posts: 3

We are using cob command to link the MQ library - libmqmcb and getting the below error:

undefined symbol first referenced in
xcsConverString in /app/mqm/opt/lib64/libmqmcb.so
CSCtrl in /app/mqm/opt/lib64/libmqmcb.so
and few more variables.


but if we link the files using cob with both the libraries libmqmcb and libmqmcs, it is able to link. But then going forward gives the 2012 Environment issue.
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bruce2359
PostPosted: Wed May 04, 2016 3:43 am Post subject: Reply with quote

Poobah

Joined: 05 Jan 2008
Posts: 7845
Location: US: west coast, almost. Otherwise, enroute.

What was the complete 'cob' command you executed?

What o/s? IBM MQ v 8.0.0.0? Which COBOL compiler?
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tczielke
PostPosted: Wed May 04, 2016 10:28 am Post subject: Reply with quote

Yatiri

Joined: 08 Jul 2010
Posts: 652
Location: Illinois, USA

Are you sure your /app/mqm/opt/lib64/libmqmcb.so is a v8 file?

When I use the nm command to list the symbols in either the 7.5 or 8.0 version of libmqmcb.so, I don't see either of these symbols:

xcsConverString
CSCtrl
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mqbee2016
PostPosted: Thu May 05, 2016 3:39 am Post subject: Reply with quote

Newbie

Joined: 25 Apr 2016
Posts: 3

OS is solaris. and MQ version is 8.0.0.4.

I can see the variables defined in libmqmcs.so but undefined in libmqmcb.so, but their presence is there(as UNDEF) when I run nm command.
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tczielke
PostPosted: Thu May 05, 2016 8:07 pm Post subject: Reply with quote

Yatiri

Joined: 08 Jul 2010
Posts: 652
Location: Illinois, USA

Ok, I checked this out on Solaris for 8.0.0.4 and I see what you are saying. Those two symbols you mentioned were added into the libmqmcb.so at 8.0 (don't see them in 7.5) and the only shared object file that I see those symbols globally defined in is the libmqmcs.so. Maybe check this out with IBM in a PMR? My only other advice is make sure you are following the manual recommendations on how to build COBOL programs on Solaris.

http://www.ibm.com/support/knowledgecenter/SSFKSJ_8.0.0/com.ibm.mq.dev.doc/q028620_.htm?lang=en
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