[pulseaudio-discuss] Pause a audio stream

[Tanu Kaskinen]

[Why is every line that you write prefixed with ">"? That's usually only
used for quoted text.]

On Fri, 2013-12-20 at 09:48 +0530, sathishkumar sivagurunathan wrote:
> >
> > Hi ,
> >
> > I am trying to add a new function "pa_context_set_sink_input_paused" to
> the pulseaudio introspect.c file. I was able to able and successfully
> compile pulseaudio too..
> >
> > gcc pa_listclients_pause.c -o pa_listclients_pause -L
> /home/sathish/Desktop/pulseaudio-4.0/build/src/.libs/ -lpulse
> >
> > /tmp/ccueP47b.o: In function `pa_get_devicelist':
> >
> > pa_listclients_pause.c.text+0x6cb): undefined reference to
> `pa_context_set_sink_input_paused'
> >
> > collect2: error: ld returned 1 exit status
> >
> > But when I try to run a program using this new function, it returns me
> "undefined reference".
> >
> > I tried to run the nm command and check whether the new function is
> present in libpulse.so
> >
> > The function returns me it has found it..
> >
> > nm -A *.so | grep "pa_context_set_sink_input_paused"
> >
> > libpulse.so:0001d4a0 t pa_context_set_sink_input_paused
> >
> > I am not able to comprehend what is happening. Can you help me with this
> ??

Notice the "t" in the nm output. It means that the symbol is in the text
(code) section, but more importantly, it means that the symbol is local
to the library, not exported to outside world. An exported symbol would
have upper case "T".

The most likely reason why the symbol isn't exported is that you didn't
add the new function to src/map-file. All functions in libpulse that are
supposed to be used by applications need to be added to src/map-file.

-- 
Tanu