diff --git a/src/AudacityLogger.cpp b/src/AudacityLogger.cpp
index a11fbad60..5e2e22f65 100644
--- a/src/AudacityLogger.cpp
+++ b/src/AudacityLogger.cpp
@@ -79,6 +79,8 @@ AudacityLogger::AudacityLogger()
    mUpdated = false;
 }
 
+AudacityLogger::~AudacityLogger()  = default;
+
 void AudacityLogger::Flush()
 {
    if (mUpdated && mFrame && mFrame->IsShown()) {
diff --git a/src/AudacityLogger.h b/src/AudacityLogger.h
index 925619b97..caab2b194 100644
--- a/src/AudacityLogger.h
+++ b/src/AudacityLogger.h
@@ -31,6 +31,8 @@ class AudacityLogger final : public wxEvtHandler,
                              public PrefsListener
 {
  public:
+
+   ~AudacityLogger() override;
  
    // Get the singleton instance or null
    static AudacityLogger *Get();
diff --git a/src/ModuleManager.h b/src/ModuleManager.h
index 084a46f71..ff38f29e6 100644
--- a/src/ModuleManager.h
+++ b/src/ModuleManager.h
@@ -107,6 +107,8 @@ private:
    // I'm a singleton class
    ModuleManager();
    ~ModuleManager();
+   ModuleManager(const ModuleManager&) PROHIBITED;
+   ModuleManager &operator=(const ModuleManager&) PROHIBITED;
 
    void InitializeBuiltins();
    ModuleInterface *LoadModule(const PluginPath & path);
diff --git a/src/Registry.h b/src/Registry.h
index 759dd9939..e529cf563 100644
--- a/src/Registry.h
+++ b/src/Registry.h
@@ -131,6 +131,7 @@ namespace Registry {
       GroupItem( const Identifier &internalName, BaseItemPtrs &&items_ )
          : BaseItem{ internalName }, items{ std::move( items_ ) }
       {}
+      GroupItem( const GroupItem& ) PROHIBITED;
       ~GroupItem() override = 0;
 
       // Whether the item is non-significant for path naming
diff --git a/src/commands/CommandSignature.cpp b/src/commands/CommandSignature.cpp
index 3434a5af7..00f12573c 100644
--- a/src/commands/CommandSignature.cpp
+++ b/src/commands/CommandSignature.cpp
@@ -16,6 +16,8 @@
 
 #include "CommandSignature.h"
 
+CommandSignature::CommandSignature() = default;
+
 CommandSignature::~CommandSignature()
 {
 }
diff --git a/src/commands/CommandSignature.h b/src/commands/CommandSignature.h
index 3d618285a..623a73512 100644
--- a/src/commands/CommandSignature.h
+++ b/src/commands/CommandSignature.h
@@ -30,9 +30,10 @@ class CommandSignature
 private:
    ParamValueMap mDefaults;
    ValidatorMap mValidators;
-   explicit CommandSignature(const CommandSignature & WXUNUSED(other)) { }
+   CommandSignature(const CommandSignature &) PROHIBITED;
+   CommandSignature& operator=(const CommandSignature &) PROHIBITED;
 public:
-   explicit CommandSignature() { }
+   explicit CommandSignature();
    ~CommandSignature();
 
    // Add a parameter to the signature.
diff --git a/src/import/Import.h b/src/import/Import.h
index a67edaaaa..5272059f8 100644
--- a/src/import/Import.h
+++ b/src/import/Import.h
@@ -98,6 +98,9 @@ public:
    Importer();
    ~Importer();
 
+   Importer( const Importer& ) PROHIBITED;
+   Importer &operator=( Importer& ) PROHIBITED;
+
    /**
     * Return instance reference
     */
@@ -156,7 +159,7 @@ public:
     * Returns a pointer to internal items array.
     * External objects are allowed to change the array contents.
     */
-   ExtImportItems &GetImportItems() { return mExtImportItems; };
+   ExtImportItems &GetImportItems() { return mExtImportItems; }
 
    /**
     * Allocates NEW ExtImportItem, fills it with default data
diff --git a/src/import/ImportPlugin.cpp b/src/import/ImportPlugin.cpp
index 3ea486369..de5f8f984 100644
--- a/src/import/ImportPlugin.cpp
+++ b/src/import/ImportPlugin.cpp
@@ -15,6 +15,24 @@ Paul Licameli split from Import.cpp
 #include "../widgets/ProgressDialog.h"
 #include "../prefs/QualityPrefs.h"
 
+ImportPlugin::ImportPlugin(FileExtensions supportedExtensions):
+   mExtensions( std::move( supportedExtensions ) )
+{
+}
+
+ImportPlugin::~ImportPlugin() = default;
+
+FileExtensions ImportPlugin::GetSupportedExtensions()
+{
+   return mExtensions;
+}
+
+bool ImportPlugin::SupportsExtension(const FileExtension &extension)
+{
+   // Case-insensitive check if extension is supported
+   return mExtensions.Index(extension, false) != wxNOT_FOUND;
+}
+
 ImportFileHandle::ImportFileHandle(const FilePath & filename)
 :  mFilename(filename)
 {
diff --git a/src/import/ImportPlugin.h b/src/import/ImportPlugin.h
index 03f2e5978..71caab36b 100644
--- a/src/import/ImportPlugin.h
+++ b/src/import/ImportPlugin.h
@@ -77,16 +77,9 @@ public:
    // Get a list of extensions this plugin expects to be able to
    // import.  If a filename matches any of these extensions,
    // this importer will get first dibs on importing it.
-   virtual FileExtensions GetSupportedExtensions()
-   {
-      return mExtensions;
-   }
+   virtual FileExtensions GetSupportedExtensions();
 
-   bool SupportsExtension(const FileExtension &extension)
-   {
-      // Case-insensitive check if extension is supported
-      return mExtensions.Index(extension, false) != wxNOT_FOUND;
-   }
+   bool SupportsExtension(const FileExtension &extension);
 
    // Open the given file, returning true if it is in a recognized
    // format, false otherwise.  This puts the importer into the open
@@ -94,14 +87,11 @@ public:
    virtual std::unique_ptr<ImportFileHandle> Open(
       const FilePath &Filename, AudacityProject*) = 0;
 
-   virtual ~ImportPlugin() { }
+   virtual ~ImportPlugin();
 
 protected:
 
-   ImportPlugin(FileExtensions supportedExtensions):
-      mExtensions( std::move( supportedExtensions ) )
-   {
-   }
+   ImportPlugin(FileExtensions supportedExtensions);
 
    const FileExtensions mExtensions;
 };
diff --git a/src/tracks/ui/TimeShiftHandle.cpp b/src/tracks/ui/TimeShiftHandle.cpp
index 084592cf3..fd349fa0a 100644
--- a/src/tracks/ui/TimeShiftHandle.cpp
+++ b/src/tracks/ui/TimeShiftHandle.cpp
@@ -111,6 +111,8 @@ void ClipMoveState::DoHorizontalOffset( double offset )
    }
 }
 
+TrackShifter::TrackShifter() = default;
+
 TrackShifter::~TrackShifter() = default;
 
 void TrackShifter::UnfixIntervals(
diff --git a/src/tracks/ui/TimeShiftHandle.h b/src/tracks/ui/TimeShiftHandle.h
index 9dde7dfe3..f095ecb3b 100644
--- a/src/tracks/ui/TimeShiftHandle.h
+++ b/src/tracks/ui/TimeShiftHandle.h
@@ -30,6 +30,10 @@ class ViewInfo;
 //! Abstract base class for policies to manipulate a track type with the Time Shift tool
 class TrackShifter {
 public:
+   TrackShifter();
+   TrackShifter(const TrackShifter&) PROHIBITED;
+   TrackShifter &operator=(const TrackShifter&) PROHIBITED;
+
    virtual ~TrackShifter() = 0;
    //! There is always an associated track
    virtual Track &GetTrack() const = 0;
@@ -196,6 +200,14 @@ using MakeTrackShifter = AttachedVirtualFunction<
 class ViewInfo;
 
 struct ClipMoveState {
+   ClipMoveState() = default;
+
+   ClipMoveState(const ClipMoveState&) PROHIBITED;
+   ClipMoveState& operator =(const ClipMoveState&) PROHIBITED;
+
+   ClipMoveState(ClipMoveState&&) = default;
+   ClipMoveState& operator =(ClipMoveState&&) = default;
+
    using ShifterMap = std::unordered_map<Track*, std::unique_ptr<TrackShifter>>;
    
    //! Will associate a TrackShifter with each track in the list
diff --git a/src/widgets/ImageRoll.cpp b/src/widgets/ImageRoll.cpp
index 932ed98b0..ded589ac4 100644
--- a/src/widgets/ImageRoll.cpp
+++ b/src/widgets/ImageRoll.cpp
@@ -102,6 +102,10 @@
 #include <wx/dcclient.h>
 #include <wx/image.h>
 
+ImageRoll::ImageRoll(const ImageRoll&) = default;
+ImageRoll &ImageRoll::operator =(const ImageRoll&) = default;
+ImageRoll::~ImageRoll() = default;
+
 // static
 ImageArray ImageRoll::SplitH(const wxImage &src, wxColour magicColor)
 {
diff --git a/src/widgets/ImageRoll.h b/src/widgets/ImageRoll.h
index 915f5804c..0424e97b9 100644
--- a/src/widgets/ImageRoll.h
+++ b/src/widgets/ImageRoll.h
@@ -38,6 +38,9 @@ class ImageRoll
    ImageRoll();
    ImageRoll(const wxImage &src);
    ImageRoll(RollType type, const wxImage &src, wxColour magicColor);
+   ImageRoll(const ImageRoll&);
+   ImageRoll &operator =(const ImageRoll&);
+   ~ImageRoll();
 
    bool Ok() const;
 
diff --git a/src/widgets/NumericTextCtrl.cpp b/src/widgets/NumericTextCtrl.cpp
index 80944be91..4c8937a0b 100644
--- a/src/widgets/NumericTextCtrl.cpp
+++ b/src/widgets/NumericTextCtrl.cpp
@@ -938,6 +938,8 @@ void NumericConverter::PrintDebugInfo()
    wxPrintf("\n");
 }
 
+NumericConverter::NumericConverter(const NumericConverter&) = default;
+
 NumericConverter::~NumericConverter()
 {
 }
diff --git a/src/widgets/NumericTextCtrl.h b/src/widgets/NumericTextCtrl.h
index 2f2c74ceb..cb6e5452b 100644
--- a/src/widgets/NumericTextCtrl.h
+++ b/src/widgets/NumericTextCtrl.h
@@ -85,6 +85,7 @@ public:
                     const NumericFormatSymbol & formatName = {},
                     double value = 0.0f,
                     double sampleRate = 1.0f /* to prevent div by 0 */);
+   NumericConverter(const NumericConverter&);
 
    virtual ~NumericConverter();