Re: Undefined symbol error when load VxWorks .much file

[Scott Baily <sbaily@lanl.gov>]

I see your first question has been answered, but I'll answer the second 
question.  Loading the file already tells you which symbol is undefined, 
so then you look at the libraries used to build the IOC and find which 
one refers to this symbol.  Finding the undefined symbol without booting 
and loading the module is also useful.  I wrote a simple perl script 
that runs nm, and finds all the undefined symbols in the munch file, 
then eliminates the ones that are defined in the kernel file. I use this 
script as part of the IOC build process for some of our IOCs, this way I 
can be alerted to undefined symbols before attempting to boot the IOC.

On 11/4/2015 2:09 PM, J. Lewis Muir wrote:
> load("17lab.munch")
> Undefined symbol: snprintf (binding 1 type 0)
> ld error: Module contains undefined symbol(s) and may be unusable.
> value = 0 = 0x0
>
> Done executing startup script /ioc/boot/17lab/st.cmd
> 17lab>
> --->8---
>
> Does anyone know what's wrong or how to debug this?
>
> I've tried running nmppc on 17lab.munch, but there are *many* symbols
> prefixed with a 'U'.  In fact, when I run nmppc on a known-good .munch
> file, it too shows many symbols prefixed with a 'U', so I'm not
> confident I'm looking at the right thing.
--
Scott Baily
AOT-IC, MS H820
Los Alamos National Laboratory
Los Alamos, NM 87545
ph: (505) 606-2260