Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Thu, 14 Oct 2010 09:02:23 -0500

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
-- 
If a man is offered a fact which goes against his instincts, he will
scrutinize it closely, and unless the evidence is overwhelming, he will
refuse to believe it.  If, on the other hand, he is offered something
which affords a reason for acting in accordance to his instincts, he
will accept it even on the slightest evidence.  -- Bertrand Russell

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System