Enable JACK_JUCE=1 for standalone build

[JoseDiazRohena]

This would allow the use of jack to route audio in and out of standalone.

[pspbar]

I have edited

libs/JUCE/modules/juce_audio_devices/juce_audio_devices.h

and changed the line

#define JUCE_JACK 0

to

#define JUCE_JACK 1

then build it as per instructions, now, standalone valentine exposes inputs and outputs that qpwgraph, helvum, or carla, for example, can manage to make connections.

Tested in voidlinux with pipewire.

[tank-trax]

the easiest method would be in CMakeLists.txt under target_compile_definitions("${PROJECT_NAME}

to add

   JUCE_ALSA=1
   JUCE_JACK=1

as follows...

target_compile_definitions("${PROJECT_NAME}"
    PUBLIC
    # JUCE_WEB_BROWSER and JUCE_USE_CURL would be on by default, but you might not need them.
    JUCE_WEB_BROWSER=0  # If you remove this, add `NEEDS_WEB_BROWSER TRUE` to the `juce_add_plugin` call
    JUCE_USE_CURL=0     # If you remove this, add `NEEDS_CURL TRUE` to the `juce_add_plugin` call
    JUCE_VST3_CAN_REPLACE_VST2=0
    JUCE_ENABLE_GPL_MODE=1
    JUCE_DISPLAY_SPLASH_SCREEN=0
    JUCE_REPORT_APP_USAGE=0
    JUCE_MODAL_LOOPS_PERMITTED=1
    JUCE_ENABLE_LIVE_CONSTANT_EDITOR=0
    JUCE_ALSA=1
    JUCE_JACK=1
    )