Fix vst3 host build

source/modules/juce_audio_processors/Makefile

@@ -15,6 +15,7 @@ ifeq ($(CARLA_VESTIGE_HEADER),true)
 BUILD_CXX_FLAGS += -DVESTIGE_HEADER
 else
 # needed by vst3
+BUILD_CXX_FLAGS += -DUNICODE_OFF -fpermissive
 ifeq ($(DEBUG),true)
 BUILD_CXX_FLAGS += -DDEVELOPMENT -D_DEBUG
 else

source/modules/juce_audio_processors/format_types/juce_VST3Common.h

@@ -27,8 +27,8 @@
 
 //==============================================================================
 #define JUCE_DECLARE_VST3_COM_REF_METHODS \
-    Steinberg::uint32 JUCE_CALLTYPE addRef() override   { return (Steinberg::uint32) ++refCount; } \
-    Steinberg::uint32 JUCE_CALLTYPE release() override  { const int r = --refCount; if (r == 0) delete this; return (Steinberg::uint32) r; }
+    Steinberg::uint32 PLUGIN_API JUCE_CALLTYPE addRef() override   { return (Steinberg::uint32) ++refCount; } \
+    Steinberg::uint32 PLUGIN_API JUCE_CALLTYPE release() override  { const int r = --refCount; if (r == 0) delete this; return (Steinberg::uint32) r; }
 
 #define JUCE_DECLARE_VST3_COM_QUERY_METHODS \
     Steinberg::tresult PLUGIN_API JUCE_CALLTYPE queryInterface (const Steinberg::TUID, void** obj) override \

source/modules/juce_audio_processors/format_types/juce_VST3PluginFormat.cpp

@@ -451,7 +451,7 @@ public:
     tresult PLUGIN_API getName (Vst::String128 name) override
     {
         Steinberg::String str (appName.toUTF8());
-        str.copyTo (name, 0, 127);
+        str.copyTo16 (name, 0, 127);
         return kResultOk;
     }
 
@@ -685,7 +685,7 @@ private:
             if (fetchValueForId (id, stringToFetch))
             {
                 Steinberg::String str (stringToFetch.toRawUTF8());
-                str.copyTo (result, 0, (Steinberg::int32) jmin (length, (Steinberg::uint32) std::numeric_limits<Steinberg::int32>::max()));
+                str.copyTo16 (result, 0, (Steinberg::int32) jmin (length, (Steinberg::uint32) std::numeric_limits<Steinberg::int32>::max()));
 
                 return kResultTrue;
             }