[lttng-dev] Issues on basic LTTng trace userspace (tutorial)

[Jonathan Rajotte-Julien]

On Wed, Mar 24, 2021 at 06:55:37PM +0000, MONTET Julien wrote:
> Hi Jonathan,
> 
> You are absolutely right !
> I have two different lttng :   find /usr -name "*liblttng-ust*" Ubuntu Pastebin<https://paste.ubuntu.com/p/NVtXPhj4fW/>

Glad to know that we are making progress.

> 
> According to you, what would be the best solution to solve this issue ?
> I have indeed a folder named lttng-ust where I have made the (wrong) configure / make.

Go into the lttng folder and do:
  sudo make uninstall
  sudo ldconfig

> 
> 
> I tried to (temporary) remove all the libttng* /usr/local/lib/, but I face this problem :

That should works also.

> /usr/bin/ld: hello-tp.o: in function `__lttng_events_init__hello_world':
> hello-tp.c:(.text+0xe56): undefined reference to `lttng_ust_probe_register'
> /usr/bin/ld: hello-tp.o: in function `__lttng_events_exit__hello_world':
> hello-tp.c:(.text+0xeb2): undefined reference to `lttng_ust_probe_unregister'
> collect2: error: ld returned 1 exit status

Did you remove the -L/usr/local/bin flag? There should be no reason to keep it
at this point.

> 
> In the worst case scenario I am able to get my last clean snapchot.

That is also a good bet :).

-- 
Jonathan Rajotte-Julien
EfficiOS