Re: problems with loading devLibOpt

[Andrew Johnson <anj@aps.anl.gov>]

Yuriy Gorbunov wrote:
> I'm trying to move my application (vme 162) VxWorks 5.2 from R3.12.x
> to R3.13.10
>
> ld <iocCore  -> loads without problem
> ld < seq       -> no problem
>
> but trying to load devLibOpt gives such error message :
>
> ld < devLibOpt
> undefined symbol: _devGpibLib_initAi
> undefined symbol: _devGpibLib_readAi
> undefined symbol: _devGpibLib_aiGpibWork
> ...
> undefined symbol: _devGpibLib_initDevSup
> undefined symbol: _devGpibLib_report
> undefined symbol: _devGpibLib_setPvSevr
> undefined symbol: _ibDebug
> undefined symbol: _drvGpib
> undefined symbol: _ibSrqDebug
> ld error: error reading file (errno = 0x1c0001).

devLibOpt depends on devCommonGpib.o which is where the above symbols 
can be found; you'll have to load that first if you want to do it this 
way.  If you don't need GPIB for your IOC at all though, you should be 
able to load just the devOpt object files that your application needs 
instead of the whole devLibOpt library.

However rather than loading them individually like this a much better 
way to get all your device and record support code loaded is to link 
them together into a single binary in one of your App/src directories 
and load that file instead.  Look at the makeBaseApp example application 
for hints on how to do that.

HTH,

- Andrew
--
When a distinguished but elderly scientist states that something is
possible, he is almost certainly right.  When he states that something
is impossible, he is very probably wrong.  -- Arthur C. Clarke