Don't try to build VST/VST3 hosting code on iOS and add missing header

extras/Projucer/Source/Project/jucer_Module.cpp

@@ -328,7 +328,7 @@ void LibraryModule::addSettingsForModuleToExporter (ProjectExporter& exporter, P
         XCodeProjectExporter& xcodeExporter = dynamic_cast<XCodeProjectExporter&> (exporter);
 
         if (project.isAUPluginHost())
-            xcodeExporter.xcodeFrameworks.addTokens ("AudioUnit CoreAudioKit", false);
+            xcodeExporter.xcodeFrameworks.addTokens (xcodeExporter.isOSX() ? "AudioUnit CoreAudioKit" : "CoreAudioKit", false);
 
         const String frameworks (moduleInfo.moduleInfo [xcodeExporter.isOSX() ? "OSXFrameworks" : "iOSFrameworks"].toString());
         xcodeExporter.xcodeFrameworks.addTokens (frameworks, ", ", StringRef());

modules/juce_audio_processors/format/juce_AudioPluginFormatManager.cpp

@@ -65,11 +65,11 @@ void AudioPluginFormatManager::addDefaultFormats()
     // you should only call this method once!
     for (int i = formats.size(); --i >= 0;)
     {
-       #if JUCE_PLUGINHOST_VST
+       #if JUCE_PLUGINHOST_VST && (JUCE_MAC || JUCE_WIN || JUCE_LINUX)
         jassert (dynamic_cast<VSTPluginFormat*> (formats[i]) == nullptr);
        #endif
 
-       #if JUCE_PLUGINHOST_VST3
+       #if JUCE_PLUGINHOST_VST3 && (JUCE_MAC || JUCE_WIN)
         jassert (dynamic_cast<VST3PluginFormat*> (formats[i]) == nullptr);
        #endif
 
@@ -87,11 +87,11 @@ void AudioPluginFormatManager::addDefaultFormats()
     formats.add (new AudioUnitPluginFormat());
    #endif
 
-   #if JUCE_PLUGINHOST_VST
+   #if JUCE_PLUGINHOST_VST && (JUCE_MAC || JUCE_WIN || JUCE_LINUX)
     formats.add (new VSTPluginFormat());
    #endif
 
-   #if JUCE_PLUGINHOST_VST3
+   #if JUCE_PLUGINHOST_VST3 && (JUCE_MAC || JUCE_WIN)
     formats.add (new VST3PluginFormat());
    #endif
 

modules/juce_audio_processors/format_types/juce_AudioUnitPluginFormat.mm

@@ -39,6 +39,18 @@
  #include <AudioUnit/AudioUnitCarbonView.h>
 #endif
 
+#ifndef JUCE_SUPPORTS_AUv3
+ #if JUCE_COMPILER_SUPPORTS_VARIADIC_TEMPLATES && defined (MAC_OS_X_VERSION_MIN_REQUIRED) && (MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_8) && __OBJC2__
+  #define JUCE_SUPPORTS_AUv3 1
+ #else
+  #define JUCE_SUPPORTS_AUv3 0
+ #endif
+#endif
+
+#if JUCE_SUPPORTS_AUv3
+ #include <CoreAudioKit/AUViewController.h>
+#endif
+
 namespace juce
 {
 
@@ -61,14 +73,6 @@ namespace juce
  #define JUCE_AU_LOG(a)
 #endif
 
-#ifndef JUCE_SUPPORTS_AUv3
- #if JUCE_COMPILER_SUPPORTS_VARIADIC_TEMPLATES
-  #define JUCE_SUPPORTS_AUv3 1
- #else
-  #define JUCE_SUPPORTS_AUv3 0
- #endif
-#endif
-
 namespace AudioUnitFormatHelpers
 {
    #if JUCE_DEBUG
@@ -1516,7 +1520,7 @@ private:
     AutoResizingNSViewComponent wrapper;
 
    #if JUCE_SUPPORTS_AUv3
-    typedef void (^ViewControllerCallbackBlock)(NSViewController *);
+    typedef void (^ViewControllerCallbackBlock)(AUViewControllerBase *);
     ObjCBlock<ViewControllerCallbackBlock> viewControllerCallback;
    #endif
 
@@ -1617,7 +1621,7 @@ private:
     }
 
    #if JUCE_SUPPORTS_AUv3
-    void requestViewControllerCallback (NSViewController* controller)
+    void requestViewControllerCallback (AUViewControllerBase* controller)
     {
         auto nsSize = [controller preferredContentSize];
         auto viewSize = CGSizeMake (nsSize.width, nsSize.height);

modules/juce_audio_processors/format_types/juce_VST3PluginFormat.cpp

@@ -22,7 +22,7 @@
   ==============================================================================
 */
 
-#if JUCE_PLUGINHOST_VST3
+#if JUCE_PLUGINHOST_VST3 && (JUCE_MAC || JUCE_WIN)
 
 } // namespace juce
 

modules/juce_audio_processors/format_types/juce_VST3PluginFormat.h

@@ -25,7 +25,7 @@
 #ifndef JUCE_VST3PLUGINFORMAT_H_INCLUDED
 #define JUCE_VST3PLUGINFORMAT_H_INCLUDED
 
-#if JUCE_PLUGINHOST_VST3
+#if (JUCE_PLUGINHOST_VST3 && (JUCE_MAC || JUCE_WIN)) || DOXYGEN
 
 /**
     Implements a plugin format for VST3s.

modules/juce_audio_processors/format_types/juce_VSTPluginFormat.cpp

@@ -22,7 +22,7 @@
   ==============================================================================
 */
 
-#if JUCE_PLUGINHOST_VST
+#if JUCE_PLUGINHOST_VST && (JUCE_MAC || JUCE_WIN || JUCE_LINUX)
 
 //==============================================================================
 #if JUCE_MAC && JUCE_SUPPORT_CARBON

modules/juce_audio_processors/format_types/juce_VSTPluginFormat.h

@@ -22,7 +22,7 @@
   ==============================================================================
 */
 
-#if JUCE_PLUGINHOST_VST || DOXYGEN
+#if (JUCE_PLUGINHOST_VST && (JUCE_MAC || JUCE_WIN || JUCE_LINUX)) || DOXYGEN
 
 //==============================================================================
 /**