Why is it not documented somewhere?
I have both libraries working now. Just by linking against jack first
and afterwards against libjackserver.
On 03/06/2018 10:14 AM, Filipe Coelho wrote:
This is a known scenario.
Those 2 libs share some code, but in a different way.
A client application is never supposed to control the server.
Do not link against the 2 libraries from within the same application,
and you'll be fine.
On 06.03.2018 09:04, Christoph Kuhr wrote:
Hi *,
I observed some strange behavior of libjack and libjackserver.
If I have a multiprocessing application with one jack server fork and
one jack client fork, jack_client_open crashs.
Here the backtrace:
#0 __strcmp_ssse3 () at ../sysdeps/x86_64/multiarch/../strcmp.S:174
#1 0x00007f83dddb803f in jack_find_driver_descriptor(_JSList*, char
const*) () from /usr/local/lib/libjackserver.so.0
#2 0x00007f83dddb9ef8 in Jack::JackServerGlobals::Init() () from
/usr/local/lib/libjackserver.so.0
#3 0x00007f83dddb64f8 in jack_client_open_aux(char const*,
JackOptions, JackStatus*, __va_list_tag*) () from
/usr/local/lib/libjackserver.so.0
#4 0x00007f83dddb67b1 in jack_client_open () from
/usr/local/lib/libjackserver.so.0
#5 0x0000000000414f04 in talker_Process (arguments=0x63f680
<arguments>) at ../src/net/avb/talker/talker_process.c:395
#6 0x000000000042d487 in avbruntime (arguments=0x63f680 <arguments>)
at ../src/avbruntime.c:644
#7 0x000000000042e888 in main (argc=11, argv=0x7ffebee6f678) at
../src/main.c:144
The interesting thing is, jack_client_open keeps crashing if I remove
all the jack server code.
It was neccessary to remove the -ljackserver linker option as well,
because the client code linked against libjackserver.so instead of
libjack.so.
This means it is not possible to have a jack server and a jack client
in a single multiprocessing application.
BR,
Ck
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