[lttng-dev] undefined reference to `lttng_probe_register

[Mathieu Desnoyers]

----- Original Message -----

> From: "Ritchie Vickery" <Ritchie.Vickery at imgtec.com>
> To: lttng-dev at lists.lttng.org
> Sent: Wednesday, March 12, 2014 7:09:08 AM
> Subject: [lttng-dev] undefined reference to `lttng_probe_register

> Hi,

> I’m trying to setup lttng for the first time.

> I’ve made librcu, lttng-ust, lttng-tools and lttng-modules and have
> instrumented some User code.

> I have run the tool to generate the tracepoint code:

> $ lttng-gen-tp ustrcv.tp –o ustrcv.h –o ustrcv.c

> However, at the point where the user-mode library containing ustrcv.o gets
> linked, I see the following error:

> /usr/local/include/lttng/ust-tracepoint-event.h:779: undefined reference to
> `lttng_probe_register'

> Does anyone have any ideas what I may have missed?

You probably forgot to link the tracepoint probe against liblttng-ust. See lttng-ust(3) manpage for details. 

Thanks, 

Mathieu 

> Many thanks,

> Ritchie

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-- 
Mathieu Desnoyers 
EfficiOS Inc. 
http://www.efficios.com 
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