WIP:some updates on cmake stuff in order to build aRts with optional backend (alsa, jack...) #4

Add support for Open Sound System, this has to be tested either on Linux and FreeBSD, the PATH have to be checked/adjusted for FreeBSD.

Rem: have a look at Threads support, thing aren't clear to me at the moment.

Hi Greg,
I tried testing this in Debian.

Testing PR as is, causing any building to be skipped. Ninja builds gives a 2 steps process instead of the usual 187.
Playing around with debian config, I got to a point where libesd was required, but there is no libesd in bullseye at all.
Disabling WITH_ESOUND I go further but again ninja-builds report a 2 steps process only and build failed.

I didn't have more time to test this today. Will try to do more later if I find the time, but I thought it would be worth giving you some feedback.

Hi Michele, you can't build this PR as-is since I've left It in a none building state, see all the directories but one (libltdl) are commented.

I often adopt this strategy when I convert/cleanup a module which is actually a marker for me, It tells me that I haven't had a look at the other directories yet. When I remove WIP then you may give It a go.

On the contrary, what is usefull to me is that you build aRts from master with Jack support.
At the moment the Deb packaging does not pick up on Jack, as a result Jack can't be selected as a backend in the Trinity Control Center.

In order to build aRts with Jack you have to adjust the rules file with either adding to It -DWITH_JACK="ON" or switching from -DBUILD_ALL="ON" to -DWITH_ALL_OPTIONS="ON" -DWITH_ESOUND="OFF".

If I'm not mistaken, once aRts is built with Jack support, "Jack Audio Connection Kit" should be available as a backend in TDE.
Menu->Trinity Control Center->Sound & Multimedia->Sound system->Hardware->Select the audio device:->Jack Audio Connection Kit
Btw, the label "Select the audio device:" is not meaningful to me since we aren't really selecting a piece of hardware here.

Then, there is a test button: Sound system->Hardware->Test Sound
I wish to know if you ear a sound with Jack as a backend, because on my system It does not play, I get the test sound with Alsa only (don't have PulseAudio installed)

I also hope that you guys move from Jack1 (legacy) to Jack2 in Debian too...if possible.

Hi Greg,
thanks for the feedback. Yesterday was a super busy day so I only gave it a build test and did not see the WIP status of the PR. Will build arts from master with jack enabled and will let you know how it goes.

Hi Greg,
alsa works fine as backend. Will build arts with jack support and feedback.

Hi Greg,
apologies for the long wait. I finally built arts with jack 1 support and tested. I don't hear any sound, either with the test button or with NoAtun, which works fine with alsa instead.
I have not tested with jack2.

I tried also jack2 and same, no sound.
Playing around with qjackctl it seems my jack server does not start at all, which would explain the missing sound.

I can start jack1 server, but still no sound.