diff --git a/modules/juce_core/native/juce_mac_Files.mm b/modules/juce_core/native/juce_mac_Files.mm
index 7c2bb18389..503efb7492 100644
--- a/modules/juce_core/native/juce_mac_Files.mm
+++ b/modules/juce_core/native/juce_mac_Files.mm
@@ -101,7 +101,7 @@ namespace FileHelpers
     }
 
    #if JUCE_IOS
-    String getIOSSystemLocation (NSSearchPathDirectory type)
+    static String getIOSSystemLocation (NSSearchPathDirectory type)
     {
         return nsStringToJuce ([NSSearchPathForDirectoriesInDomains (type, NSUserDomainMask, YES)
                                 objectAtIndex: 0]);
@@ -392,7 +392,7 @@ bool DirectoryIterator::NativeIterator::next (String& filenameFound,
 
 
 //==============================================================================
-bool JUCE_CALLTYPE Process::openDocument (const String& fileName, const String& parameters)
+bool JUCE_CALLTYPE Process::openDocument (const String& fileName, const String& /*parameters*/)
 {
     JUCE_AUTORELEASEPOOL
     {
diff --git a/modules/juce_core/native/juce_mac_Network.mm b/modules/juce_core/native/juce_mac_Network.mm
index 55be8391bc..b042d0571b 100644
--- a/modules/juce_core/native/juce_mac_Network.mm
+++ b/modules/juce_core/native/juce_mac_Network.mm
@@ -59,6 +59,11 @@ bool JUCE_CALLTYPE Process::openEmailWithAttachments (const String& targetEmailA
                                                       const StringArray& filesToAttach)
 {
   #if JUCE_IOS
+    (void) targetEmailAddress;
+    (void) emailSubject;
+    (void) bodyText;
+    (void) filesToAttach;
+
     //xxx probably need to use MFMailComposeViewController
     jassertfalse;
     return false;
diff --git a/modules/juce_events/native/juce_ios_MessageManager.mm b/modules/juce_events/native/juce_ios_MessageManager.mm
index 70e61bd9b4..bdfed65999 100644
--- a/modules/juce_events/native/juce_ios_MessageManager.mm
+++ b/modules/juce_events/native/juce_ios_MessageManager.mm
@@ -40,7 +40,7 @@ bool MessageManager::runDispatchLoopUntil (int millisecondsToRunFor)
     {
         jassert (isThisTheMessageThread()); // must only be called by the message thread
 
-        uint32 endTime = Time::getMillisecondCounter() + millisecondsToRunFor;
+        uint32 startTime = Time::getMillisecondCounter();
         NSDate* endDate = [NSDate dateWithTimeIntervalSinceNow: millisecondsToRunFor * 0.001];
 
         while (! quitMessagePosted)
@@ -50,7 +50,8 @@ bool MessageManager::runDispatchLoopUntil (int millisecondsToRunFor)
                 [[NSRunLoop currentRunLoop] runMode: NSDefaultRunLoopMode
                                          beforeDate: endDate];
 
-                if (millisecondsToRunFor >= 0 && Time::getMillisecondCounter() >= endTime)
+                if (millisecondsToRunFor >= 0
+                     && Time::getMillisecondCounter() >= startTime + (uint32) millisecondsToRunFor)
                     break;
             }
         }
diff --git a/modules/juce_gui_basics/native/juce_ios_UIViewComponentPeer.mm b/modules/juce_gui_basics/native/juce_ios_UIViewComponentPeer.mm
index 388792c53f..3b27b6109c 100644
--- a/modules/juce_gui_basics/native/juce_ios_UIViewComponentPeer.mm
+++ b/modules/juce_gui_basics/native/juce_ios_UIViewComponentPeer.mm
@@ -287,11 +287,16 @@ private:
 - (void) willRotateToInterfaceOrientation: (UIInterfaceOrientation) toInterfaceOrientation
                                  duration: (NSTimeInterval) duration
 {
+    (void) toInterfaceOrientation;
+    (void) duration;
+
     [UIView setAnimationsEnabled: NO]; // disable this because it goes the wrong way and looks like crap.
 }
 
 - (void) didRotateFromInterfaceOrientation: (UIInterfaceOrientation) fromInterfaceOrientation
 {
+    (void) fromInterfaceOrientation;
+
     JuceUIView* juceView = (JuceUIView*) [self view];
     jassert (juceView != nil && juceView->owner != nullptr);
     juceView->owner->updateTransformAndScreenBounds();
@@ -308,11 +313,13 @@ private:
 
 - (void) viewWillAppear: (BOOL) animated
 {
+    (void) animated;
     [self viewDidLoad];
 }
 
 - (void) viewDidAppear: (BOOL) animated
 {
+    (void) animated;
     [self viewDidLoad];
 }
 
@@ -354,18 +361,24 @@ private:
 //==============================================================================
 - (void) touchesBegan: (NSSet*) touches withEvent: (UIEvent*) event
 {
+    (void) touches;
+
     if (owner != nullptr)
         owner->handleTouches (event, true, false, false);
 }
 
 - (void) touchesMoved: (NSSet*) touches withEvent: (UIEvent*) event
 {
+    (void) touches;
+
     if (owner != nullptr)
         owner->handleTouches (event, false, false, false);
 }
 
 - (void) touchesEnded: (NSSet*) touches withEvent: (UIEvent*) event
 {
+    (void) touches;
+
     if (owner != nullptr)
         owner->handleTouches (event, false, true, false);
 }
@@ -402,7 +415,8 @@ private:
 
 - (BOOL) textView: (UITextView*) textView shouldChangeTextInRange: (NSRange) range replacementText: (NSString*) text
 {
-    return owner->textViewReplaceCharacters (Range<int> (range.location, range.location + range.length),
+    (void) textView;
+    return owner->textViewReplaceCharacters (Range<int> ((int) range.location, (int) (range.location + range.length)),
                                              nsStringToJuce (text));
 }
 
@@ -432,7 +446,7 @@ private:
 namespace juce
 {
 
-bool KeyPress::isKeyCurrentlyDown (const int keyCode)
+bool KeyPress::isKeyCurrentlyDown (int)
 {
     return false;
 }
@@ -534,7 +548,7 @@ void UIViewComponentPeer::setVisible (bool shouldBeVisible)
         window.hidden = ! shouldBeVisible;
 }
 
-void UIViewComponentPeer::setTitle (const String& title)
+void UIViewComponentPeer::setTitle (const String&)
 {
     // xxx is this possible?
 }
@@ -669,7 +683,7 @@ void UIViewComponentPeer::toFront (bool makeActiveWindow)
     if (isSharedWindow)
         [[view superview] bringSubviewToFront: view];
 
-    if (window != nil && component.isVisible())
+    if (makeActiveWindow && window != nil && component.isVisible())
         [window makeKeyAndVisible];
 }
 
@@ -876,14 +890,14 @@ bool UIViewComponentPeer::canBecomeKeyWindow()
 }
 
 //==============================================================================
-void Desktop::setKioskComponent (Component* kioskModeComponent, bool enableOrDisable, bool allowMenusAndBars)
+void Desktop::setKioskComponent (Component* kioskModeComp, bool enableOrDisable, bool /*allowMenusAndBars*/)
 {
     [[UIApplication sharedApplication] setStatusBarHidden: enableOrDisable
                                             withAnimation: UIStatusBarAnimationSlide];
 
     displays->refresh();
 
-    if (ComponentPeer* const peer = kioskModeComponent->getPeer())
+    if (ComponentPeer* const peer = kioskModeComp->getPeer())
         peer->setFullScreen (enableOrDisable);
 }
 
diff --git a/modules/juce_gui_basics/native/juce_ios_Windowing.mm b/modules/juce_gui_basics/native/juce_ios_Windowing.mm
index fe06fbb40d..48999db688 100644
--- a/modules/juce_gui_basics/native/juce_ios_Windowing.mm
+++ b/modules/juce_gui_basics/native/juce_ios_Windowing.mm
@@ -39,6 +39,7 @@
 
 - (void) applicationDidFinishLaunching: (UIApplication*) application
 {
+    (void) application;
     initialiseJuce_GUI();
 
     JUCEApplicationBase* app = JUCEApplicationBase::createInstance();
@@ -49,17 +50,20 @@
 
 - (void) applicationWillTerminate: (UIApplication*) application
 {
+    (void) application;
     JUCEApplicationBase::appWillTerminateByForce();
 }
 
 - (void) applicationDidEnterBackground: (UIApplication*) application
 {
+    (void) application;
     if (JUCEApplicationBase* const app = JUCEApplicationBase::getInstance())
         app->suspended();
 }
 
 - (void) applicationWillEnterForeground: (UIApplication*) application
 {
+    (void) application;
     if (JUCEApplicationBase* const app = JUCEApplicationBase::getInstance())
         app->resumed();
 }
@@ -69,6 +73,7 @@
 namespace juce
 {
 
+int juce_iOSMain (int argc, const char* argv[]);
 int juce_iOSMain (int argc, const char* argv[])
 {
     return UIApplicationMain (argc, const_cast<char**> (argv), nil, @"JuceAppStartupDelegate");
@@ -177,9 +182,9 @@ namespace juce
 
 //==============================================================================
 #if JUCE_MODAL_LOOPS_PERMITTED
-void JUCE_CALLTYPE NativeMessageBox::showMessageBox (AlertWindow::AlertIconType iconType,
+void JUCE_CALLTYPE NativeMessageBox::showMessageBox (AlertWindow::AlertIconType /*iconType*/,
                                                      const String& title, const String& message,
-                                                     Component* associatedComponent)
+                                                     Component* /*associatedComponent*/)
 {
     JUCE_AUTORELEASEPOOL
     {
@@ -189,17 +194,17 @@ void JUCE_CALLTYPE NativeMessageBox::showMessageBox (AlertWindow::AlertIconType
 }
 #endif
 
-void JUCE_CALLTYPE NativeMessageBox::showMessageBoxAsync (AlertWindow::AlertIconType iconType,
+void JUCE_CALLTYPE NativeMessageBox::showMessageBoxAsync (AlertWindow::AlertIconType /*iconType*/,
                                                           const String& title, const String& message,
-                                                          Component* associatedComponent,
+                                                          Component* /*associatedComponent*/,
                                                           ModalComponentManager::Callback* callback)
 {
     new iOSMessageBox (title, message, @"OK", nil, nil, callback, true);
 }
 
-bool JUCE_CALLTYPE NativeMessageBox::showOkCancelBox (AlertWindow::AlertIconType iconType,
+bool JUCE_CALLTYPE NativeMessageBox::showOkCancelBox (AlertWindow::AlertIconType /*iconType*/,
                                                       const String& title, const String& message,
-                                                      Component* associatedComponent,
+                                                      Component* /*associatedComponent*/,
                                                       ModalComponentManager::Callback* callback)
 {
     ScopedPointer<iOSMessageBox> mb (new iOSMessageBox (title, message, @"Cancel", @"OK",
@@ -212,9 +217,9 @@ bool JUCE_CALLTYPE NativeMessageBox::showOkCancelBox (AlertWindow::AlertIconType
     return false;
 }
 
-int JUCE_CALLTYPE NativeMessageBox::showYesNoCancelBox (AlertWindow::AlertIconType iconType,
+int JUCE_CALLTYPE NativeMessageBox::showYesNoCancelBox (AlertWindow::AlertIconType /*iconType*/,
                                                         const String& title, const String& message,
-                                                        Component* associatedComponent,
+                                                        Component* /*associatedComponent*/,
                                                         ModalComponentManager::Callback* callback)
 {
     ScopedPointer<iOSMessageBox> mb (new iOSMessageBox (title, message, @"Cancel", @"Yes", @"No", callback, callback != nullptr));
@@ -227,13 +232,13 @@ int JUCE_CALLTYPE NativeMessageBox::showYesNoCancelBox (AlertWindow::AlertIconTy
 }
 
 //==============================================================================
-bool DragAndDropContainer::performExternalDragDropOfFiles (const StringArray& files, const bool canMoveFiles)
+bool DragAndDropContainer::performExternalDragDropOfFiles (const StringArray&, bool)
 {
     jassertfalse;    // no such thing on iOS!
     return false;
 }
 
-bool DragAndDropContainer::performExternalDragDropOfText (const String& text)
+bool DragAndDropContainer::performExternalDragDropOfText (const String&)
 {
     jassertfalse;    // no such thing on iOS!
     return false;
@@ -257,7 +262,7 @@ bool juce_areThereAnyAlwaysOnTopWindows()
 }
 
 //==============================================================================
-Image juce_createIconForFile (const File& file)
+Image juce_createIconForFile (const File&)
 {
     return Image::null;
 }
diff --git a/modules/juce_gui_basics/native/juce_mac_FileChooser.mm b/modules/juce_gui_basics/native/juce_mac_FileChooser.mm
index 11bd0ef4cc..3ac733aec6 100644
--- a/modules/juce_gui_basics/native/juce_mac_FileChooser.mm
+++ b/modules/juce_gui_basics/native/juce_mac_FileChooser.mm
@@ -209,16 +209,16 @@ bool FileChooser::isPlatformDialogAvailable()
     return false;
 }
 
-void FileChooser::showPlatformDialog (Array<File>& results,
-                                      const String& title,
-                                      const File& currentFileOrDirectory,
-                                      const String& filter,
-                                      bool selectsDirectory,
-                                      bool selectsFiles,
-                                      bool isSaveDialogue,
-                                      bool warnAboutOverwritingExistingFiles,
-                                      bool selectMultipleFiles,
-                                      FilePreviewComponent* extraInfoComponent)
+void FileChooser::showPlatformDialog (Array<File>&,
+                                      const String& /*title*/,
+                                      const File& /*currentFileOrDirectory*/,
+                                      const String& /*filter*/,
+                                      bool /*selectsDirectory*/,
+                                      bool /*selectsFiles*/,
+                                      bool /*isSaveDialogue*/,
+                                      bool /*warnAboutOverwritingExistingFiles*/,
+                                      bool /*selectMultipleFiles*/,
+                                      FilePreviewComponent*)
 {
     jassertfalse; //there's no such thing in iOS
 }
diff --git a/modules/juce_gui_basics/native/juce_mac_MouseCursor.mm b/modules/juce_gui_basics/native/juce_mac_MouseCursor.mm
index b685ca8f40..5686bfc17a 100644
--- a/modules/juce_gui_basics/native/juce_mac_MouseCursor.mm
+++ b/modules/juce_gui_basics/native/juce_mac_MouseCursor.mm
@@ -146,8 +146,8 @@ void MouseCursor::showInWindow (ComponentPeer*) const
 #else
 
 void* CustomMouseCursorInfo::create() const                                              { return nullptr; }
-void* MouseCursor::createStandardMouseCursor (MouseCursor::StandardCursorType type)      { return nullptr; }
-void MouseCursor::deleteMouseCursor (void* const cursorHandle, const bool isStandard)    {}
+void* MouseCursor::createStandardMouseCursor (MouseCursor::StandardCursorType)           { return nullptr; }
+void MouseCursor::deleteMouseCursor (void*, bool)                                        {}
 void MouseCursor::showInAllWindows() const                                               {}
 void MouseCursor::showInWindow (ComponentPeer*) const                                    {}
 
diff --git a/modules/juce_gui_extra/native/juce_mac_WebBrowserComponent.mm b/modules/juce_gui_extra/native/juce_mac_WebBrowserComponent.mm
index c59476538d..a7997bb183 100644
--- a/modules/juce_gui_extra/native/juce_mac_WebBrowserComponent.mm
+++ b/modules/juce_gui_extra/native/juce_mac_WebBrowserComponent.mm
@@ -80,6 +80,8 @@ private:
 - (BOOL) gestureRecognizer: (UIGestureRecognizer*) gestureRecognizer
          shouldRecognizeSimultaneouslyWithGestureRecognizer: (UIGestureRecognizer*) otherGestureRecognizer
 {
+    (void) gestureRecognizer;
+    (void) otherGestureRecognizer;
     return YES;
 }
 
@@ -106,6 +108,8 @@ private:
 
 - (BOOL) webView: (UIWebView*) webView shouldStartLoadWithRequest: (NSURLRequest*) request navigationType: (UIWebViewNavigationType) navigationType
 {
+    (void) webView;
+    (void) navigationType;
     return ownerComponent->pageAboutToLoad (nsStringToJuce (request.URL.absoluteString));
 }
 @end
diff --git a/modules/juce_opengl/native/juce_OpenGL_ios.h b/modules/juce_opengl/native/juce_OpenGL_ios.h
index 6c63be6fb9..21f9fc241d 100644
--- a/modules/juce_opengl/native/juce_OpenGL_ios.h
+++ b/modules/juce_opengl/native/juce_OpenGL_ios.h
@@ -44,14 +44,14 @@ class OpenGLContext::NativeContext
 {
 public:
     NativeContext (Component& component,
-                   const OpenGLPixelFormat& pixelFormat,
-                   void* contextToShareWith,
-                   bool useMultisampling)
+                   const OpenGLPixelFormat& pixFormat,
+                   void* contextToShare,
+                   bool multisampling)
         : frameBufferHandle (0), colorBufferHandle (0), depthBufferHandle (0),
           msaaColorHandle (0), msaaBufferHandle (0),
           lastWidth (0), lastHeight (0), needToRebuildBuffers (false),
-          swapFrames (0), useDepthBuffer (pixelFormat.depthBufferBits > 0),
-          useMSAA (useMultisampling)
+          swapFrames (0), useDepthBuffer (pixFormat.depthBufferBits > 0),
+          useMSAA (multisampling)
     {
         JUCE_AUTORELEASEPOOL
         {
@@ -78,8 +78,8 @@ public:
 
             const NSUInteger type = kEAGLRenderingAPIOpenGLES2;
 
-            if (contextToShareWith != nullptr)
-                [context initWithAPI: type  sharegroup: [(EAGLContext*) contextToShareWith sharegroup]];
+            if (contextToShare != nullptr)
+                [context initWithAPI: type  sharegroup: [(EAGLContext*) contextToShare sharegroup]];
             else
                 [context initWithAPI: type];