Experimental Physics and
Industrial Control System

Jay Steele <[email protected]> · Wed, 13 Oct 2010 15:57:14 -0700

Hi Lewis,
    Thanks for the suggestion. I did check and I'm linking in the tpmac libraries in the same order as you have them. I still have the error. The conflict appears to be that ioc21idbnpVX_registerRecordDeviceDriver.o is not finding the symbols defined in libpmacIoc.a.

Here's an abbreviated version of the output from the make command (without a bunch of -L options, vxComLibrary, and other libraries).

/powerpc-wrs-vxworks/bin/ld -r -o 21idbnp -static ioc21idbnpVX_registerRecordDeviceDriver.o -lpmacIoc

Thanks,
Jay Steele

________________________________________
From: J. Lewis Muir [[email protected]]
Sent: Wednesday, October 13, 2010 3:31 PM
To: Jay Steele
Cc: [email protected]
Subject: Re: problem with tpmac-3-7 (loading IOC munch file results in undefined symbol error)

On 10/13/10 4:43 PM, 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
>
> 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"

Hi, Jay.

In what order did you list the libraries in your Makefile?  I believe
the GNU linker used for building for vxWorks is a single-pass linker, so
the order matters.

Here's the order I have for one of my IOCs:

  17idb_vxWorks_LIBS += pmacIoc
  17idb_vxWorks_LIBS += pmacAsynCoord
  17idb_vxWorks_LIBS += pmacAsynMotor
  17idb_vxWorks_LIBS += pmacAsynIPPort

Lewis

--
J. Lewis Muir
Software Engineer
IMCA-CAT

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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System