diff --git a/src/emucore/CartELF.hxx b/src/emucore/CartELF.hxx
index 91acd8021..f87279692 100644
--- a/src/emucore/CartELF.hxx
+++ b/src/emucore/CartELF.hxx
@@ -30,7 +30,7 @@ class CartridgeELF: public Cartridge {
   public:
     CartridgeELF(const ByteBuffer& image, size_t size, string_view md5,
                  const Settings& settings);
-    virtual ~CartridgeELF();
+    ~CartridgeELF() override;
 
   // Methods from Device
   public:
@@ -67,11 +67,11 @@ class CartridgeELF: public Cartridge {
 
   private:
     class BusFallbackDelegate: public CortexM0::BusTransactionDelegate {
-      CortexM0::err_t fetch16(uInt32 address, uInt16& value, uInt8& op, CortexM0& cortex);
-      CortexM0::err_t read8(uInt32 address, uInt8& value, CortexM0& cortex);
+      CortexM0::err_t fetch16(uInt32 address, uInt16& value, uInt8& op, CortexM0& cortex) override;
+      CortexM0::err_t read8(uInt32 address, uInt8& value, CortexM0& cortex) override;
     };
 
-    enum class ExecutionStage {
+    enum class ExecutionStage: uInt8 {
       boot, preinit, init, main
     };
 
@@ -125,6 +125,14 @@ class CartridgeELF: public Cartridge {
 
     ExecutionStage myExecutionStage{ExecutionStage::boot};
     uInt32 myInitFunctionIndex{0};
+
+  private:
+    // Following constructors and assignment operators not supported
+    CartridgeELF(const CartridgeELF&) = delete;
+    CartridgeELF(CartridgeELF&&) = delete;
+    CartridgeELF& operator=(const CartridgeELF&) = delete;
+    CartridgeELF& operator=(CartridgeELF&&) = delete;
+
 };
 
 #endif // CARTRIDGE_ELF
diff --git a/src/emucore/CortexM0.hxx b/src/emucore/CortexM0.hxx
index f2f547a9d..6efd6f214 100644
--- a/src/emucore/CortexM0.hxx
+++ b/src/emucore/CortexM0.hxx
@@ -32,6 +32,7 @@ class CortexM0
 
     class BusTransactionDelegate {
       public:
+        BusTransactionDelegate() = default;
         virtual ~BusTransactionDelegate() = default;
 
         virtual err_t read32(uInt32 address, uInt32& value, CortexM0& cortex);
@@ -43,6 +44,13 @@ class CortexM0
         virtual err_t write8(uInt32 address, uInt8 value, CortexM0& cortex);
 
         virtual err_t fetch16(uInt32 address, uInt16& value, uInt8& op, CortexM0& cortex);
+
+      private:
+        // Following constructors and assignment operators not supported
+        BusTransactionDelegate(const BusTransactionDelegate&) = delete;
+        BusTransactionDelegate(BusTransactionDelegate&&) = delete;
+        BusTransactionDelegate& operator=(const BusTransactionDelegate&) = delete;
+        BusTransactionDelegate& operator=(BusTransactionDelegate&&) = delete;
     };
 
     static constexpr uInt32 PAGE_SIZE = 4096;
@@ -63,27 +71,27 @@ class CortexM0
     static constexpr err_t ERR_SWI = 13;
     static constexpr err_t ERR_UNDEFINED_INST = 14;
 
-    static inline bool isErrCustom(err_t err) {
+    static constexpr bool isErrCustom(err_t err) {
       return (err & 0xff) == 0;
     }
 
-    static inline uInt32 getErrCustom(err_t err)  {
+    static constexpr uInt32 getErrCustom(err_t err)  {
       return (err & 0xffffffff) >> 8;
     }
 
-    static inline uInt8 getErrInstrinsic(err_t err)  {
+    static constexpr uInt8 getErrInstrinsic(err_t err)  {
       return err;
     }
 
-    static inline uInt32 getErrExtra(err_t err) {
+    static constexpr uInt32 getErrExtra(err_t err) {
       return err >> 32;
     }
 
-    static inline err_t errCustom(uInt32 code, uInt32 extra = 0) {
+    static constexpr err_t errCustom(uInt32 code, uInt32 extra = 0) {
       return ((static_cast<uInt64>(code) << 8) & 0xffffffff) | (static_cast<uInt64>(extra) << 32);
     }
 
-    static inline err_t errIntrinsic(uInt8 code, uInt32 extra = 0) {
+    static constexpr err_t errIntrinsic(uInt8 code, uInt32 extra = 0) {
       return static_cast<uInt64>(code) | (static_cast<uInt64>(extra) << 32);
     }
 
@@ -91,6 +99,7 @@ class CortexM0
 
   public:
     CortexM0();
+    ~CortexM0() = default;
 
     CortexM0& mapRegionData(uInt32 pageBase, uInt32 pageCount,
                             bool readOnly, uInt8* backingStore);
@@ -120,7 +129,7 @@ class CortexM0
     err_t write16(uInt32 address, uInt16 value);
     err_t write8(uInt32 address, uInt8 value);
 
-    inline uInt64 getCycles() const {
+    uInt64 getCycles() const {
       return myCycleCounter;
     }
 
@@ -134,12 +143,12 @@ class CortexM0
     };
 
     struct MemoryRegionAccessData {
-      uInt8* backingStore;
+      uInt8* backingStore{nullptr};
     };
 
     struct MemoryRegionAccessCode {
-      uInt8* backingStore;
-      uInt8* ops;
+      uInt8* backingStore{nullptr};
+      uInt8* ops{nullptr};
     };
 
     struct MemoryRegion {
@@ -152,14 +161,14 @@ class CortexM0
 
       MemoryRegionType type{MemoryRegionType::unmapped};
 
-      uInt32 base;
-      uInt32 size;
-      bool readOnly;
+      uInt32 base{0};
+      uInt32 size{0};
+      bool readOnly{false};
 
       union {
         MemoryRegionAccessData accessData;
         MemoryRegionAccessCode accessCode;
-        BusTransactionDelegate* delegate;
+        BusTransactionDelegate* delegate{nullptr};
       } access;
 
       private:
@@ -195,10 +204,10 @@ class CortexM0
     uInt64 myCycleCounter{0};
 
     static constexpr uInt32
-      CPSR_N = 1u << 31,
-      CPSR_Z = 1u << 30,
-      CPSR_C = 1u << 29,
-      CPSR_V = 1u << 28;
+      CPSR_N = 1U << 31,
+      CPSR_Z = 1U << 30,
+      CPSR_C = 1U << 29,
+      CPSR_V = 1U << 28;
 
   private:
     // Following constructors and assignment operators not supported
diff --git a/src/emucore/elf/BusTransactionQueue.hxx b/src/emucore/elf/BusTransactionQueue.hxx
index 6ce03963d..795cdbfe3 100644
--- a/src/emucore/elf/BusTransactionQueue.hxx
+++ b/src/emucore/elf/BusTransactionQueue.hxx
@@ -28,14 +28,15 @@ class BusTransactionQueue {
 
       void setBusState(bool& drive, uInt8& value) const;
 
-      uInt16 address;
-      uInt8 value;
-      uInt64 timestamp;
-      bool yield;
+      uInt16 address{0};
+      uInt8 value{0};
+      uInt64 timestamp{0};
+      bool yield{false};
     };
 
   public:
     explicit BusTransactionQueue(size_t capacity);
+    ~BusTransactionQueue() = default;
 
     BusTransactionQueue& reset();
 
@@ -52,7 +53,7 @@ class BusTransactionQueue {
     bool hasPendingTransaction() const;
     Transaction* getNextTransaction(uInt16 address, uInt64 timestamp);
 
-    inline size_t size() const {
+    size_t size() const {
       return myQueueSize;
     }
 
@@ -60,7 +61,7 @@ class BusTransactionQueue {
     void push(const Transaction& transaction);
 
   private:
-    const size_t myQueueCapacity;
+    const size_t myQueueCapacity{0};
 
     unique_ptr<Transaction[]> myQueue;
     size_t myQueueNext{0};
diff --git a/src/emucore/elf/ElfEnvironment.hxx b/src/emucore/elf/ElfEnvironment.hxx
index 9fd191942..a615d633d 100644
--- a/src/emucore/elf/ElfEnvironment.hxx
+++ b/src/emucore/elf/ElfEnvironment.hxx
@@ -120,6 +120,6 @@ namespace elfEnvironment {
   enum class Palette: uInt8 {pal, ntsc};
 
   vector<ElfLinker::ExternalSymbol> externalSymbols(Palette palette);
-}
+}  // namespace elfEnvironment
 
 #endif // ELF_ENVIRONMENT
diff --git a/src/emucore/elf/ElfFile.hxx b/src/emucore/elf/ElfFile.hxx
index 4b133a7df..bd409bf4a 100644
--- a/src/emucore/elf/ElfFile.hxx
+++ b/src/emucore/elf/ElfFile.hxx
@@ -23,44 +23,45 @@
 class ElfFile {
   public:
     struct Section {
-      uInt32 nameOffset;
+      uInt32 nameOffset{0};
       string name;
 
-      uInt32 type;
-      uInt32 flags;
+      uInt32 type{0};
+      uInt32 flags{0};
 
-      uInt32 virtualAddress;
-      uInt32 offset;
-      uInt32 size;
+      uInt32 virtualAddress{0};
+      uInt32 offset{0};
+      uInt32 size{0};
 
-      uInt32 info;
-      uInt32 align;
+      uInt32 info{0};
+      uInt32 align{0};
     };
 
     struct Symbol {
-      uInt32 nameOffset;
-      uInt32 value;
-      uInt32 size;
-      uInt8 info;
-      uInt8 visibility;
-      uInt16 section;
+      uInt32 nameOffset{0};
+      uInt32 value{0};
+      uInt32 size{0};
+      uInt8 info{0};
+      uInt8 visibility{0};
+      uInt16 section{0};
 
       string name;
-      uInt8 bind;
-      uInt8 type;
+      uInt8 bind{0};
+      uInt8 type{0};
     };
 
     struct Relocation {
-      uInt32 offset;
-      uInt32 info;
+      uInt32 offset{0};
+      uInt32 info{0};
       optional<uInt32> addend;
 
-      uInt32 symbol;
-      uInt8 type;
+      uInt32 symbol{0};
+      uInt8 type{0};
       string symbolName;
     };
 
   public:
+    ElfFile() = default;
     virtual ~ElfFile() = default;
 
     virtual const uInt8 *getData() const = 0;
@@ -68,7 +69,7 @@ class ElfFile {
 
     virtual const vector<Section>& getSections() const = 0;
     virtual const vector<Symbol>& getSymbols() const = 0;
-    virtual const optional<vector<Relocation>> getRelocations(size_t section) const = 0;
+    virtual optional<vector<Relocation>> getRelocations(size_t section) const = 0;
 
   public:
     static constexpr uInt8 ENDIAN_LITTLE_ENDIAN = 0x01;
@@ -100,6 +101,13 @@ class ElfFile {
     static constexpr uInt32 R_ARM_TARGET1 = 0x26;
 
     static constexpr uInt32 STT_FUNC = 0x02;
+
+  private:
+    // Following constructors and assignment operators not supported
+    ElfFile(const ElfFile&) = delete;
+    ElfFile(ElfFile&&) = delete;
+    ElfFile& operator=(const ElfFile&) = delete;
+    ElfFile& operator=(ElfFile&&) = delete;
 };
 
 #endif // ELF_FILE
diff --git a/src/emucore/elf/ElfLinker.cxx b/src/emucore/elf/ElfLinker.cxx
index f8e2ce04e..ff108be42 100644
--- a/src/emucore/elf/ElfLinker.cxx
+++ b/src/emucore/elf/ElfLinker.cxx
@@ -155,7 +155,7 @@ ElfLinker::RelocatedSymbol ElfLinker::findRelocatedSymbol(string_view name) cons
     if (!myRelocatedSymbols[i])
       ElfSymbolResolutionError::raise("symbol could not be relocated");
 
-    return *myRelocatedSymbols[i];
+    return *myRelocatedSymbols[i]; // FIXME: bugprone-unchecked-optional-access
   }
 
   ElfSymbolResolutionError::raise("symbol not found");
@@ -404,7 +404,7 @@ void ElfLinker::copyInitArrays(vector<uInt32>& initArray, const std::unordered_m
 void ElfLinker::applyRelocationToSection(const ElfFile::Relocation& relocation, size_t iSection)
 {
   const auto& targetSection = myElf.getSections()[iSection];
-  const auto& targetSectionRelocated = *myRelocatedSections[iSection];
+  const auto& targetSectionRelocated = *myRelocatedSections[iSection]; // FIXME: bugprone-unchecked-optional-access
   const auto& symbol = myElf.getSymbols()[relocation.symbol];
   const auto& relocatedSymbol = myRelocatedSymbols[relocation.symbol];
 
diff --git a/src/emucore/elf/ElfLinker.hxx b/src/emucore/elf/ElfLinker.hxx
index a6ca61175..cf90dc61b 100644
--- a/src/emucore/elf/ElfLinker.hxx
+++ b/src/emucore/elf/ElfLinker.hxx
@@ -37,7 +37,7 @@ class ElfLinker {
         explicit ElfLinkError(string_view reason) : myReason(reason) {}
 
       private:
-        const string myReason;
+        string myReason;
     };
 
     class ElfSymbolResolutionError : public std::exception {
@@ -54,29 +54,30 @@ class ElfLinker {
         explicit ElfSymbolResolutionError(string_view reason) : myReason(reason) {}
 
       private:
-        const string myReason;
+        string myReason;
     };
 
     enum class SegmentType: uInt8 { text, data, rodata };
 
     struct RelocatedSection {
       SegmentType segment;
-      uInt32 offset;
+      uInt32 offset{0};
     };
 
     struct RelocatedSymbol {
       optional<SegmentType> segment;
-      uInt32 value;
-      bool undefined;
+      uInt32 value{0};
+      bool undefined{true};
     };
 
     struct ExternalSymbol {
       string name;
-      uInt32 value;
+      uInt32 value{0};
     };
 
   public:
     ElfLinker(uInt32 textBase, uInt32 dataBase, uInt32 rodataBase, const ElfFile& elf);
+    ~ElfLinker() = default;
 
     ElfLinker& setUndefinedSymbolDefault(uInt32 defaultValue);
     void link(const vector<ExternalSymbol>& externalSymbols);
diff --git a/src/emucore/elf/ElfParser.cxx b/src/emucore/elf/ElfParser.cxx
index 5415abc39..f67ddb7d6 100644
--- a/src/emucore/elf/ElfParser.cxx
+++ b/src/emucore/elf/ElfParser.cxx
@@ -127,7 +127,7 @@ const vector<ElfParser::Symbol>& ElfParser::getSymbols() const
 }
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
-const optional<vector<ElfParser::Relocation>> ElfParser::getRelocations(size_t section) const
+optional<vector<ElfParser::Relocation>> ElfParser::getRelocations(size_t section) const
 {
   return myRelocations.contains(section) ? myRelocations.at(section) : optional<vector<Relocation>>();
 }
diff --git a/src/emucore/elf/ElfParser.hxx b/src/emucore/elf/ElfParser.hxx
index f73969a61..858b31461 100644
--- a/src/emucore/elf/ElfParser.hxx
+++ b/src/emucore/elf/ElfParser.hxx
@@ -39,11 +39,12 @@ class ElfParser : public ElfFile {
         explicit ElfParseError(string_view reason) : myReason(reason) {}
 
       private:
-        const string myReason;
+        string myReason;
     };
 
   public:
     ElfParser() = default;
+    ~ElfParser() override = default;
 
     void parse(const uInt8 *elfData, size_t size);
 
@@ -52,18 +53,18 @@ class ElfParser : public ElfFile {
 
     const vector<Section>& getSections() const override;
     const vector<Symbol>& getSymbols() const override;
-    const optional<vector<Relocation>> getRelocations(size_t section) const override;
+    optional<vector<Relocation>> getRelocations(size_t section) const override;
 
   private:
     struct Header {
-      uInt16 type;
-      uInt16 arch;
-      uInt8 endianess;
-      uInt32 shOffset;
+      uInt16 type{0};
+      uInt16 arch{0};
+      uInt8 endianess{0};
+      uInt32 shOffset{0};
 
-      uInt16 shNum;
-      uInt16 shSize;
-      uInt16 shstrIndex;
+      uInt16 shNum{0};
+      uInt16 shSize{0};
+      uInt16 shstrIndex{0};
     };
 
   private:
@@ -81,9 +82,9 @@ class ElfParser : public ElfFile {
 
   private:
     const uInt8 *myData{nullptr};
-    size_t mySize;
+    size_t mySize{0};
 
-    bool myBigEndian{true};
+    bool myBigEndian{false};
 
     Header myHeader;
     vector<Section> mySections;
diff --git a/src/emucore/elf/ElfUtil.hxx b/src/emucore/elf/ElfUtil.hxx
index c47056249..2d5515171 100644
--- a/src/emucore/elf/ElfUtil.hxx
+++ b/src/emucore/elf/ElfUtil.hxx
@@ -24,6 +24,6 @@ namespace elfUtil {
   Int32 decode_B_BL(uInt32 opcode);
 
   uInt32 encode_B_BL(Int32 offset, bool link);
-}
+}  // namespace elfUtil
 
 #endif //  ELF_UTIL
diff --git a/src/emucore/elf/LinkerTest.cxx b/src/emucore/elf/LinkerTest.cxx
index aaabb962a..428fded13 100644
--- a/src/emucore/elf/LinkerTest.cxx
+++ b/src/emucore/elf/LinkerTest.cxx
@@ -60,7 +60,7 @@ namespace {
         return mySymbols;
       }
 
-      const optional<vector<Relocation>> getRelocations(size_t section) const override {
+      optional<vector<Relocation>> getRelocations(size_t section) const override {
         return myRelocations.contains(section) ? myRelocations.at(section) : optional<vector<Relocation>>();
       }
 
diff --git a/src/emucore/elf/VcsLib.cxx b/src/emucore/elf/VcsLib.cxx
index 09da8c380..2d903b049 100644
--- a/src/emucore/elf/VcsLib.cxx
+++ b/src/emucore/elf/VcsLib.cxx
@@ -107,8 +107,10 @@ namespace {
 
 // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 VcsLib::VcsLib(BusTransactionQueue& transactionQueue) : myTransactionQueue(transactionQueue)
-{}
+{
+}
 
+// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 void VcsLib::reset()
 {
   myStuffMaskA = myStuffMaskX = myStuffMaskY = 0x00;
@@ -364,7 +366,7 @@ CortexM0::err_t VcsLib::fetch16(uInt32 address, uInt16& value, uInt8& op, Cortex
       }
 
     case ADDR_RANDINT:
-      cortex.setRegister(0, rand());
+      cortex.setRegister(0, rand());  // FIXME: use C++11 random library instead
       return returnFromStub(value, op);
 
     case ADDR_VCS_TXS2:
diff --git a/src/emucore/elf/VcsLib.hxx b/src/emucore/elf/VcsLib.hxx
index df8bf7d29..987fdd4a3 100644
--- a/src/emucore/elf/VcsLib.hxx
+++ b/src/emucore/elf/VcsLib.hxx
@@ -25,17 +25,18 @@
 class VcsLib: public CortexM0::BusTransactionDelegate {
   public:
     explicit VcsLib(BusTransactionQueue& transactionQueue);
+    ~VcsLib() override = default;
 
     void reset();
 
     CortexM0::err_t fetch16(uInt32 address, uInt16& value, uInt8& op, CortexM0& cortex) override;
 
-    inline void updateBus(uInt16 address, uInt8 value) {
+    void updateBus(uInt16 address, uInt8 value) {
       myCurrentAddress = address;
       myCurrentValue = value;
     }
 
-    inline bool isSuspended() const {
+    bool isSuspended() const {
       return
         myIsWaitingForRead && (myTransactionQueue.size() > 0 || (myWaitingForReadAddress != myCurrentAddress));
     }