Re: UNWIND_INFO & STACK_UNWIND symbols missing (Warning)

* Pane, Chris ([email protected]) wrote:
> Hello - 
> 
>  
> 
> I have been slowly coming up to speed on lttng. 
> 
>  
> 
> I think I am almost there (At least with regard to getting my kernel
> ready). 
> 
>  
> 
> I am using 2.6.21.1 (Right from kernel.org) with lttng 0.9.5. 
> 
>  
> 
> I applied the patches, and am now attempting to  configure/compile the
> kernel. 
> 
>  
> 
> When I do a make xconfig, I DO see the lttng options under the
> Instrumentation tree and I select them. 
> 
>  
> 
> When I go to compile though, I see the following warning. 
> 
>  
> 
> ltt/Kconfig:271:warning: 'select' used by config symbol
> 'LTT_PROCESS_STACK' refer to undefined symbol 'UNWIND_INFO'
> 
> ltt/Kconfig:271:warning: 'select' used by config symbol
> 'LTT_PROCESS_STACK' refer to undefined symbol 'STACK_UNWIND'
> 

Hi,

It's only useful for i386 and x86_64 stack dumps. It's a minor Kconfig
issue that should be fixed, but does not have any "real life" impact
other that printing these warnings.

Mathieu

>  
> 
> Is this a problem ? I am looking through the kernel configuration files
> to see where the 2 missing symbols are, so far I have only found them in
> the lttng patch/KBuild files. 
> 
>  
> 
>  
> 
> Thanks
> 
>  
> 
> -Chris
> 
>  
> 
> Chris Pane
> Principal Engineer
> Vanteon Corporation
> 255 Woodcliff Drive, Suite 200
> Fairport, NY 14450-4226
> Office: (585) 419-9568
> Fax: (585) 248-0537
> www.vanteon.com <http://www.vanteon.com>  - Embedded for Your Future
> 
>  
> 

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-- 
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
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