[LITMUS^RT] Feather-Trace tools issue

[Glenn Elliott]

On Feb 1, 2014, at 4:23 AM, Chandrasekaran Sivakumar <chandru.a6 at gmail.com> wrote:

> Hi,
> ft_trace device isn't available in /dev/litmus. I checked the litmus-rt/litmus/Kconfig file. I compared it with the one given in https://github.com/LITMUS-RT/litmus-rt/blob/master/litmus/Kconfig. There is absolutely no difference.
>  
> And when I did 'make menuconfig', I could find only the following under LITMUS^RT > Tracing:
> 1.Enable Event/Tracepoint Tracing for real-time task tracing
> 2.TRACE() debugging
> I was not able to find the other options.
> 
> Please tell what's the issue! 
> 
> Regards,
> chandru

I believe that we already did.  ft-trace has but one dependency: CONFIG_RELOCATABLE must NOT be set.  This is evident in litmus/Kconfig.  (Line 182: https://github.com/LITMUS-RT/litmus-rt/blob/master/litmus/Kconfig#L182)

To disable CONFIG_RELOCATABLE, do:
make menuconfig > “Processor type and features” > scroll to the bottom of the list and DEselect “Build a relocatable kernel”.

Go back to LITMUS^RT > Tracing, the ft-trace options should be available.

A hidden feature of ‘make menuconfig’ is that you can hit ‘/‘ (the same search command as vim) and enter the parameter you are looking for.  You will be returned a list of matching parameters, their menu locations, and their own dependencies.

-Glenn
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