RE: problem with tpmac-3-7 (loading IOC munch file results in undefined symbol error)

[Jay Steele <jsteele@xradia.com>]

Hi Andrew Johnson and Ron Sluiter,
     You guys are correct - my problem was that I included the statement "ioc21idbnpVX_DBD += devDeltaTau.dbd" in my Makefile for the IOC. This caused conflict with the tpmac module.

Thanks,
Jay Steele

________________________________________
From: Andrew Johnson [anj@aps.anl.gov]
Sent: Thursday, October 14, 2010 7:02 AM
To: tech-talk@aps.anl.gov
Cc: Jay Steele
Subject: Re: problem with tpmac-3-7 (loading IOC munch file results in undefined symbol error)

On Wednesday 13 October 2010 16:43:12 Jay Steele wrote:
> Hi Tech-Talk,
>     To use the TurboPMAC VME board with a PPC mother board to control
> motors, I am trying to integrate tmac-3-7 with synApps_5_5 and
> epics/base-3-14-11 for my IOC named 21idbnp. I am having the following
> problem. Any clues to its resolution or a workaround would be greatly
> appreciated.
>
> tpmac-3-7 compiles with synApps. I added the statement
> "ioc21idbnpVX_DBD+=pmacInclude.dbd" to 21idbnpApp/src/Makefile.
> pmacInclude.dbd includes statusRecord.dbd, tsubRecord.dbd,
> statusDevice.dbd, pmacAsynIPPort.dbd, pmacAsynMotor.dbd, pmacAsynCoord.dbd,
> and add_pmac.dbd. Then I compile the 21idbnp IOC that includes the tpmac
> libraries (pmacAsynCoord, pmacAsynIPPort, pmacAsynMotor, pmacIoc). This
> compiles for vxWorks without error.
>
> When I load the munch file to vxworks, I get the following error.
>
> ld(0,0,"21idbnp.munch")
> Undefined symbol: pvar_dset_devPmac (binding 1 type 0)
> Undefined symbol: pvar_dset_devPmacRamStatus (binding 1 type 0)
> ld error: Module contains undefined symbol(s) and may be unusable.
> value = 0 = 0x0

This error usually means that you have a statement in your final .dbd file
that is not found in any of the libraries you're linking to.  In your case
though...

> For my investigation, I see the following:
> 1. when compiling the IOC, -lpmacIoc, -lpmacAsynCoord, -lpmacAsynIPPort,
> and -lpmacAsynMotor are used with ld to create 21idbnp. 2. grep using the
> string "pvar_dset_devPmac" in the IOC directory results in the following:
> a. binary file 21idbnp.munch matches.
>       b. ioc21idbnpVx_registerRecordDeviceDriver.cpp has references to
> pvar_dset_devPmac. c. binary file 21idbnp matches.
>       d. binary file ioc21idbnpVx_registerRecordDeviceDriver.o matches.
>       e. 21idbnp.nm has references to pvar_dset_devPmac.
> 3. Same results as #2 above for string "pvar_dset_devPmacRamStatus"

I wonder if the problem is related to the fact that you had a -static link in
the command line that you posted a couple of emails later in the thread.  It
might be helpful if we knew a little more about your setup, and whether you're
intentionally building it statically.  Often it helps if you post your
complete Makefile.

- Andrew
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