[ltt-dev] LTTng Build issue

Mathieu Desnoyers compudj at krystal.dyndns.org
Tue Oct 5 19:41:32 EDT 2010

* Srimanta Panda (srimanta.panda at gmail.com) wrote:
> Hi,
> I am quite new to this LLTng.
> I am trying to build the Kernel 2.6.34 with the ltt patch .221 for ARM
> platform. Its gives me link error related to the  trace-clock
> functionalities.
> I tried to figured out and found that it is not able to compile the
> trace-clock.c because of some flag HAVE_TRACE_CLOCK_GENERIC, which is
> present in the KConfig of the init folder.

If you look at the download page

under the "Compatibility list"

you will notice this:
"LTTng 0.230 fixes a trace clock Kconfig rebase error introduced
recently, and adds KVM instrumentation and probes."

So you'll have to either move to the newer lttng (and kernel version),
or backport the patch.



> I tried to enable the flag in the "kernel.spec", but is not able to set it
> because it is inside of menuconfig for CGROUPS. If I enable CGROUPS, it
> tells me to disable some other flags which I have no idea it is correct to
> do so.
> I saw the previous patches for the kernel 2.6.33 and found that the
> locations. It was not inside CGROUP menuconfig.
> I wondering if the two flags have been added in the wrong place in the new
> patch .221??
> Can you please help me out if I am doing any thing wrong to set
> the trace-clock?
> -- 
> Cheers,
> Srimanta

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Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.

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