[Bug]: juce_add_plugin installs plugins only into the home directory - it should offer an option to install into the system directory

[yurivict]

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Detailed steps on how to reproduce the bug

This project calls juce_add_plugin:

    juce_add_plugin(${PLUGIN_NAME}
            VERSION ${BUILD_VERSION}
            PLUGIN_NAME "RNNoise suppression for voice"
            COMPANY_NAME werman
            BUNDLE_ID my.werman.noise_suppression_for_voice
            COPY_PLUGIN_AFTER_BUILD TRUE
            PLUGIN_MANUFACTURER_CODE Werm  # This has to be one uppercase, rest lower for AU formats
            PLUGIN_CODE Rnn1               # A unique four-character plugin id with at least one upper-case character
            FORMATS "${formats}"
            PRODUCT_NAME "rnnoise${suffix}"
            LV2URI "https://github.com/werman/noise-suppression-for-voice"
            VST_COPY_DIR "lib/vst"
            VST3_COPY_DIR "lib"
            AU_COPY_DIR "${CMAKE_LIBRARY_OUTPUT_DIRECTORY}"
            LV2_COPY_DIR "lib")

This installs plugins back into build directory which was set as a home directory during build:

/usr/ports/audio/noise-suppression-for-voice-lv2/work/.build/src/juce_plugin/lib/rnnoise.vst3/Contents/x86_64-linux/rnnoise.so
/usr/ports/audio/noise-suppression-for-voice-lv2/work/.lv2/rnnoise_mono.lv2/dsp.ttl
/usr/ports/audio/noise-suppression-for-voice-lv2/work/.lv2/rnnoise_mono.lv2/librnnoise_mono.so
/usr/ports/audio/noise-suppression-for-voice-lv2/work/.lv2/rnnoise_mono.lv2/manifest.ttl
/usr/ports/audio/noise-suppression-for-voice-lv2/work/.lv2/rnnoise_mono.lv2/ui.ttl
/usr/ports/audio/noise-suppression-for-voice-lv2/work/.lv2/rnnoise_stereo.lv2/dsp.ttl
/usr/ports/audio/noise-suppression-for-voice-lv2/work/.lv2/rnnoise_stereo.lv2/librnnoise_stereo.so
/usr/ports/audio/noise-suppression-for-voice-lv2/work/.lv2/rnnoise_stereo.lv2/manifest.ttl
/usr/ports/audio/noise-suppression-for-voice-lv2/work/.lv2/rnnoise_stereo.lv2/ui.ttl

JUCE should allow to install plugins into the system path under lib/.

JUCE-7.0.5

What is the expected behaviour?

see above

Operating systems

Other

What versions of the operating systems?

FreeBSD 13.2 (irrelevant for this issue)

Architectures

x86_64

Stacktrace

No response

Plug-in formats (if applicable)

No response

Plug-in host applications (DAWs) (if applicable)

No response

Testing on the develop branch

The bug is present on the develop branch

Code of Conduct

• [X] I agree to follow the Code of Conduct