It seems that with VST SDK 3.6.12 (or some earlier revisions) folder layout and filenames have changed, so that
In file included from [..]/JuceLibraryCode/include_juce_audio_plugin_client_VST2.cpp:9: In file included from ../../../sdk/juce/modules/juce_audio_plugin_client/juce_audio_plugin_client_VST2.cpp:27: ../../../sdk/juce/modules/juce_audio_plugin_client/VST/juce_VST_Wrapper.cpp:95:10: fatal error: 'pluginterfaces/vst2.x/aeffect.h' file not found #include "pluginterfaces/vst2.x/aeffect.h" ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1 error generated.
In the VST2 section of the VST SDK there are following files:
What to do? Which VST SDK version should I use with latest JUCE release? Where do I get previous VST SDK versions from (if needed)?