On (14/03/18 10:54), x80 <x...@telus.net> put forth the proposition:
On 03/13/2018 02:54 PM, B Watson wrote:
On 3/13/18, x80 <x...@telus.net> wrote:
Yes it's jack2.
The Libs line in jack.pc looks like this:
Libs: -L/usr/lib64 -ljack
Seems it wasn't compiled with pthreads. I wonder if it's not a corrupt lib?
Eh, it probably isn't "corrupt", it's probably just that jack-rack
expects the .pc file for the jack library to always include -lpthread,
so doesn't include -lpthread explicitly.
You can use ldd on the jack library to find out whether or not it was
compiled with pthreads (I suspect it was), but whether or not jack2 was
built with pthreads, jack-rack has to be.
ldd /usr/bin/jackd returns that it was built against libpthread.
In jack-rack.SlackBuild, the configure command reads:
LDFLAGS="-lm -ldl" \
CFLAGS="$SLKCFLAGS" \
CXXFLAGS="$SLKCFLAGS" \
./configure \
--prefix=/usr \
--libdir=/usr/lib${LIBDIRSUFFIX} \
--sysconfdir=/etc \
--localstatedir=/var \
--mandir=/usr/man \
$LASH_OPT \
--disable-gnome \
--build=$ARCH-slackware-linux
Change the first line of that to read:
LDFLAGS="-lm -ldl -lpthread" \
...don't forget the trailing backslash!
I'll do a reinstall with the above changes later today.
Let me know whether or not that fixes the problem... and even if it
fixes this specific issue, there may be others.
If that fixes it, I'll probably just patch jack2's .pc file to include
-lpthread, since I suspect lots of other jack apps will have the same
problem when built with jack2.
Basically, jack2 on SBo is almost completely untested. Someone
submitted it a few years back and never updated it, and none of the
READMEs for any of the JACK-related stuff mentions it. They all list
jack-audio-connection-kit (AKA jack1) as a dependency in their .info
files, so that's what people end up using.
Jack2 is the optional dependency for qjackctl. Maybe I'll remove jack2
and reinstall jack1.
I see alsa is routed to pulseaudio in /etc/asound.conf. That scares
me. I was content with only alsa.
You're the first user I've met who has even tried jack2, so I'm very
interested to know what you've done with it. What SBo JACK stuff have
you installed, and how well do they work, that sort of thing.
I use ffmpeg, mplayer/mencoder for video and audio repair and
conversion. Also Blender. The idea with jack was to enable midi and a
sequencer so I could do my own soundtracks and effects on home
produced short films.
So, Version modified SBo's for required libs and includes, manual
builds for the software I use.
The Jack stuff I've built with SBo's include jack-keyboard, qjackctl
built against qt5 (mfw HUGE!) and alsa-plugin-jack.
I do have an unrelated day job, but I could be made available for some
SBo testing if you need it.
I've been using jack2 for years with no problems. ALl our stuff at
studioware.org uses it, including jack-rack.
We use CFLAGS="-lm -ldl -lpthread $SLKCFLAGS" in jack-rack.
http://www.studioware.org/slackbuilds/14.2/audio/effects/jack-rack/
Regards
Dave
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