diff --git a/CMakeLists.txt b/CMakeLists.txt
index a1078da42..58b64d26a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -480,7 +480,46 @@ if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
 endif()
 
 if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
-  set(FSFW_WARNING_FLAGS -Wall -Wno-gnu-anonymous-struct)
+  set(FSFW_WARNING_FLAGS 
+  -Weverything 
+
+  -Wno-gnu-anonymous-struct 
+  -Wno-c++98-compat
+  -Wno-c++98-compat-pedantic
+  -Wno-covered-switch-default
+  -Wno-padded 
+  -Wno-documentation
+  -Wno-weak-vtables
+  -Wno-c++98-c++11-compat-binary-literal
+  -Wno-documentation-unknown-command
+  -Wno-reserved-macro-identifier
+  -Wno-global-constructors
+  -Wno-reserved-identifier
+  -Wno-switch-enum
+
+  -Werror
+  #WTH?
+  -Wno-ctad-maybe-unsupported
+  #WIP
+  -Wno-undefined-func-template
+  -Wno-suggest-destructor-override
+  -Wno-suggest-override
+  -Wno-inconsistent-missing-destructor-override
+  -Wno-extra-semi
+  #could be useful:
+  -Wno-sign-conversion
+  -Wno-implicit-int-conversion
+  -Wno-shorten-64-to-32
+  -Wno-double-promotion
+  -Wno-float-conversion
+  -Wno-implicit-int-float-conversion
+  -Wno-implicit-float-conversion
+  -Wno-shadow-field-in-constructor
+  -Wno-shadow-field
+  -Wno-shadow
+  -Wno-unused-parameter
+
+  )
 endif()
 
 # Required include paths to compile the FSFW
diff --git a/src/fsfw/cfdp/handler/UserBase.h b/src/fsfw/cfdp/handler/UserBase.h
index e367b4a8c..e5c870e52 100644
--- a/src/fsfw/cfdp/handler/UserBase.h
+++ b/src/fsfw/cfdp/handler/UserBase.h
@@ -68,6 +68,7 @@ class UserBase {
 
  public:
   explicit UserBase(HasFileSystemIF& vfs);
+  virtual ~UserBase() = default;
 
   virtual void transactionIndication(const TransactionId& id) = 0;
   virtual void eofSentIndication(const TransactionId& id) = 0;
diff --git a/src/fsfw/cfdp/helpers.cpp b/src/fsfw/cfdp/helpers.cpp
index fdb7d5ff6..5aa716931 100644
--- a/src/fsfw/cfdp/helpers.cpp
+++ b/src/fsfw/cfdp/helpers.cpp
@@ -1,6 +1,6 @@
 #include "helpers.h"
 
-const char* COND_CODE_STRINGS[14] = {"Unknown",
+static const char* COND_CODE_STRINGS[14] = {"Unknown",
                                      "No Error",
                                      "Positive ACK Limit Reached",
                                      "Keep Alive Limit Reached",
diff --git a/src/fsfw/container/BinaryTree.h b/src/fsfw/container/BinaryTree.h
index d36d9ff4c..4fd9a7066 100644
--- a/src/fsfw/container/BinaryTree.h
+++ b/src/fsfw/container/BinaryTree.h
@@ -8,7 +8,7 @@
 template <typename Tp>
 class BinaryNode {
  public:
-  BinaryNode(Tp* setValue) : value(setValue), left(NULL), right(NULL), parent(NULL) {}
+  BinaryNode(Tp* setValue) : value(setValue), left(nullptr), right(nullptr), parent(nullptr) {}
   Tp* value;
   BinaryNode* left;
   BinaryNode* right;
@@ -23,31 +23,31 @@ class ExplicitNodeIterator {
   typedef Tp value_type;
   typedef Tp* pointer;
   typedef Tp& reference;
-  ExplicitNodeIterator() : element(NULL) {}
+  ExplicitNodeIterator() : element(nullptr) {}
   ExplicitNodeIterator(_Node* node) : element(node) {}
   BinaryNode<Tp>* element;
   _Self up() { return _Self(element->parent); }
   _Self left() {
-    if (element != NULL) {
+    if (element != nullptr) {
       return _Self(element->left);
     } else {
-      return _Self(NULL);
+      return _Self(nullptr);
     }
   }
   _Self right() {
-    if (element != NULL) {
+    if (element != nullptr) {
       return _Self(element->right);
     } else {
-      return _Self(NULL);
+      return _Self(nullptr);
     }
   }
   bool operator==(const _Self& __x) const { return element == __x.element; }
   bool operator!=(const _Self& __x) const { return element != __x.element; }
   pointer operator->() const {
-    if (element != NULL) {
+    if (element != nullptr) {
       return element->value;
     } else {
-      return NULL;
+      return nullptr;
     }
   }
   pointer operator*() const { return this->operator->(); }
@@ -62,13 +62,13 @@ class BinaryTree {
   typedef ExplicitNodeIterator<Tp> iterator;
   typedef BinaryNode<Tp> Node;
   typedef std::pair<iterator, iterator> children;
-  BinaryTree() : rootNode(NULL) {}
+  BinaryTree() : rootNode(nullptr) {}
   BinaryTree(Node* rootNode) : rootNode(rootNode) {}
   iterator begin() const { return iterator(rootNode); }
-  static iterator end() { return iterator(NULL); }
+  static iterator end() { return iterator(nullptr); }
   iterator insert(bool insertLeft, iterator parentNode, Node* newNode) {
     newNode->parent = parentNode.element;
-    if (parentNode.element != NULL) {
+    if (parentNode.element != nullptr) {
       if (insertLeft) {
         parentNode.element->left = newNode;
       } else {
@@ -84,13 +84,13 @@ class BinaryTree {
   children erase(iterator node) {
     if (node.element == rootNode) {
       // We're root node
-      rootNode = NULL;
+      rootNode = nullptr;
     } else {
       // Delete parent's reference
       if (node.up().left() == node) {
-        node.up().element->left = NULL;
+        node.up().element->left = nullptr;
       } else {
-        node.up().element->right = NULL;
+        node.up().element->right = nullptr;
       }
     }
     return children(node.element->left, node.element->right);
diff --git a/src/fsfw/container/PlacementFactory.h b/src/fsfw/container/PlacementFactory.h
index 668e71b85..ec6b8a732 100644
--- a/src/fsfw/container/PlacementFactory.h
+++ b/src/fsfw/container/PlacementFactory.h
@@ -61,7 +61,7 @@ class PlacementFactory {
     // Need to call destructor first, in case something was allocated by the object (shouldn't do
     // that, however).
     thisElement->~T();
-    uint8_t* pointer = (uint8_t*)(thisElement);
+    uint8_t* pointer = static_cast<uint8_t*>(thisElement);
     return dataBackend->deleteData(pointer, sizeof(T));
   }
 
diff --git a/src/fsfw/datapoollocal/LocalDataPoolManager.cpp b/src/fsfw/datapoollocal/LocalDataPoolManager.cpp
index fa76d2a7c..7c1643d80 100644
--- a/src/fsfw/datapoollocal/LocalDataPoolManager.cpp
+++ b/src/fsfw/datapoollocal/LocalDataPoolManager.cpp
@@ -286,7 +286,6 @@ ReturnValue_t LocalDataPoolManager::addUpdateToStore(HousekeepingSnapshot& updat
   result = updatePacket.serialize(&storePtr, &serializedSize, updatePacketSize,
                                   SerializeIF::Endianness::MACHINE);
   return result;
-  ;
 }
 
 void LocalDataPoolManager::handleChangeResetLogic(DataType type, DataId dataId,
diff --git a/src/fsfw/devicehandlers/ChildHandlerBase.cpp b/src/fsfw/devicehandlers/ChildHandlerBase.cpp
index ecd4cfc8d..47fdcda92 100644
--- a/src/fsfw/devicehandlers/ChildHandlerBase.cpp
+++ b/src/fsfw/devicehandlers/ChildHandlerBase.cpp
@@ -27,7 +27,7 @@ ReturnValue_t ChildHandlerBase::initialize() {
 
   if (parentId != objects::NO_OBJECT) {
     SubsystemBase* parent = ObjectManager::instance()->get<SubsystemBase>(parentId);
-    if (parent == NULL) {
+    if (parent == nullptr) {
       return returnvalue::FAILED;
     }
     parentQueue = parent->getCommandQueue();
diff --git a/src/fsfw/devicehandlers/DeviceHandlerBase.cpp b/src/fsfw/devicehandlers/DeviceHandlerBase.cpp
index fdadb0d18..f0b71c858 100644
--- a/src/fsfw/devicehandlers/DeviceHandlerBase.cpp
+++ b/src/fsfw/devicehandlers/DeviceHandlerBase.cpp
@@ -934,19 +934,14 @@ DeviceHandlerIF::CommunicationAction DeviceHandlerBase::getComAction() {
   switch (pstStep) {
     case 0:
       return CommunicationAction::PERFORM_OPERATION;
-      break;
     case 1:
       return CommunicationAction::SEND_WRITE;
-      break;
     case 2:
       return CommunicationAction::GET_WRITE;
-      break;
     case 3:
       return CommunicationAction::SEND_READ;
-      break;
     case 4:
       return CommunicationAction::GET_READ;
-      break;
     default:
       break;
   }
@@ -962,7 +957,7 @@ void DeviceHandlerBase::buildRawDeviceCommand(CommandMessage* commandMessage) {
     replyReturnvalueToCommand(result, RAW_COMMAND_ID);
     storedRawData.raw = StorageManagerIF::INVALID_ADDRESS;
   } else {
-    cookieInfo.pendingCommand = deviceCommandMap.find((DeviceCommandId_t)RAW_COMMAND_ID);
+    cookieInfo.pendingCommand = deviceCommandMap.find(static_cast<DeviceCommandId_t>(RAW_COMMAND_ID));
     cookieInfo.pendingCommand->second.isExecuting = true;
     cookieInfo.state = COOKIE_WRITE_READY;
   }
diff --git a/src/fsfw/devicehandlers/DeviceHandlerMessage.cpp b/src/fsfw/devicehandlers/DeviceHandlerMessage.cpp
index 6b38b2ff8..0f401fcdb 100644
--- a/src/fsfw/devicehandlers/DeviceHandlerMessage.cpp
+++ b/src/fsfw/devicehandlers/DeviceHandlerMessage.cpp
@@ -72,7 +72,7 @@ void DeviceHandlerMessage::clear(CommandMessage* message) {
         ipcStore->deleteData(getStoreAddress(message));
       }
     }
-      /* NO BREAK falls through*/
+      [[fallthrough]];
     case CMD_SWITCH_ADDRESS:
     case CMD_WIRETAPPING:
       message->setCommand(CommandMessage::CMD_NONE);
diff --git a/src/fsfw/ipc/CommandMessage.h b/src/fsfw/ipc/CommandMessage.h
index 1392c6991..4bae1f20f 100644
--- a/src/fsfw/ipc/CommandMessage.h
+++ b/src/fsfw/ipc/CommandMessage.h
@@ -48,7 +48,7 @@ class CommandMessage : public MessageQueueMessage, public CommandMessageIF {
   /**
    * @brief 	Default Destructor
    */
-  virtual ~CommandMessage() {}
+  ~CommandMessage() override {}
 
   /**
    * Read the DeviceHandlerCommand_t that is stored in the message,
diff --git a/src/fsfw/ipc/CommandMessageIF.h b/src/fsfw/ipc/CommandMessageIF.h
index dc8f71099..dfb7c96d4 100644
--- a/src/fsfw/ipc/CommandMessageIF.h
+++ b/src/fsfw/ipc/CommandMessageIF.h
@@ -37,7 +37,7 @@ class CommandMessageIF {
   //! par1 should contain the error code
   static const Command_t REPLY_REJECTED = MAKE_COMMAND_ID(2);
 
-  virtual ~CommandMessageIF(){};
+  virtual ~CommandMessageIF() = default;
 
   /**
    * A command message shall have a uint16_t command ID field.
diff --git a/src/fsfw/ipc/definitions.h b/src/fsfw/ipc/definitions.h
index 150502bbe..74d99320a 100644
--- a/src/fsfw/ipc/definitions.h
+++ b/src/fsfw/ipc/definitions.h
@@ -5,7 +5,7 @@
 #include <fsfw/objectmanager/frameworkObjects.h>
 
 struct MqArgs {
-  MqArgs(){};
+  MqArgs(){}
   MqArgs(object_id_t objectId, void* args = nullptr) : objectId(objectId), args(args) {}
   object_id_t objectId = objects::NO_OBJECT;
   void* args = nullptr;
diff --git a/src/fsfw/objectmanager/ObjectManagerIF.h b/src/fsfw/objectmanager/ObjectManagerIF.h
index 81ddd95aa..9ece738fb 100644
--- a/src/fsfw/objectmanager/ObjectManagerIF.h
+++ b/src/fsfw/objectmanager/ObjectManagerIF.h
@@ -40,7 +40,7 @@ class ObjectManagerIF {
   /**
    * @brief	This is the empty virtual destructor as requested by C++ interfaces.
    */
-  virtual ~ObjectManagerIF(void){};
+  virtual ~ObjectManagerIF(void){}
   /**
    * @brief	With this call, new objects are inserted to the list.
    * @details	The implementation shall return an error code in case the
diff --git a/src/fsfw/objectmanager/SystemObject.h b/src/fsfw/objectmanager/SystemObject.h
index c541ac5ec..24d713e65 100644
--- a/src/fsfw/objectmanager/SystemObject.h
+++ b/src/fsfw/objectmanager/SystemObject.h
@@ -45,7 +45,7 @@ class SystemObject : public SystemObjectIF {
   /**
    * @brief	On destruction, the object removes itself from the list.
    */
-  virtual ~SystemObject();
+  ~SystemObject() override;
   object_id_t getObjectId() const override;
   virtual ReturnValue_t initialize() override;
   virtual ReturnValue_t checkObjectConnections() override;
diff --git a/src/fsfw/objectmanager/SystemObjectIF.h b/src/fsfw/objectmanager/SystemObjectIF.h
index b9243de25..36cf3b788 100644
--- a/src/fsfw/objectmanager/SystemObjectIF.h
+++ b/src/fsfw/objectmanager/SystemObjectIF.h
@@ -36,7 +36,7 @@ class SystemObjectIF : public EventReportingProxyIF {
   /**
    * The empty virtual destructor as required for C++ interfaces.
    */
-  virtual ~SystemObjectIF() {}
+  ~SystemObjectIF() override {}
   /**
    * @brief   Initializes the object.
    * There are initialization steps which can also be done in the constructor.
diff --git a/src/fsfw/serialize/SerialBufferAdapter.cpp b/src/fsfw/serialize/SerialBufferAdapter.cpp
index 01eb76f9b..258c08160 100644
--- a/src/fsfw/serialize/SerialBufferAdapter.cpp
+++ b/src/fsfw/serialize/SerialBufferAdapter.cpp
@@ -20,9 +20,6 @@ SerialBufferAdapter<count_t>::SerialBufferAdapter(uint8_t* buffer, count_t buffe
       buffer(buffer),
       bufferLength(bufferLength) {}
 
-template <typename count_t>
-SerialBufferAdapter<count_t>::~SerialBufferAdapter() = default;
-
 template <typename count_t>
 ReturnValue_t SerialBufferAdapter<count_t>::serialize(uint8_t** buffer_, size_t* size,
                                                       size_t maxSize,
diff --git a/src/fsfw/serialize/SerialBufferAdapter.h b/src/fsfw/serialize/SerialBufferAdapter.h
index 9030d7cc4..2cd4f90dd 100644
--- a/src/fsfw/serialize/SerialBufferAdapter.h
+++ b/src/fsfw/serialize/SerialBufferAdapter.h
@@ -41,7 +41,7 @@ class SerialBufferAdapter : public SerializeIF {
    */
   SerialBufferAdapter(uint8_t* buffer, count_t bufferLength, bool serializeLength = false);
 
-  ~SerialBufferAdapter() override;
+  ~SerialBufferAdapter() override = default;
 
   ReturnValue_t serialize(uint8_t** buffer, size_t* size, size_t maxSize,
                           Endianness streamEndianness) const override;
@@ -74,4 +74,10 @@ class SerialBufferAdapter : public SerializeIF {
   count_t bufferLength = 0;
 };
 
+// declaration of explicit instantiations (which are in the cpp)
+extern template class SerialBufferAdapter<uint8_t>;
+extern template class SerialBufferAdapter<uint16_t>;
+extern template class SerialBufferAdapter<uint32_t>;
+extern template class SerialBufferAdapter<uint64_t>;
+
 #endif /* SERIALBUFFERADAPTER_H_ */
diff --git a/src/fsfw/serialize/SerializeIF.h b/src/fsfw/serialize/SerializeIF.h
index 85c298276..cf5124364 100644
--- a/src/fsfw/serialize/SerializeIF.h
+++ b/src/fsfw/serialize/SerializeIF.h
@@ -35,6 +35,12 @@ class SerializeIF {
       MAKE_RETURN_CODE(3);  // !< There are too many elements to be deserialized
 
   virtual ~SerializeIF() = default;
+  // C++11 deprecates automatic generation of copy ctor and assignment operator when
+  // a destructor is defined, so we need to explicitely set them to default
+  SerializeIF(const SerializeIF&) = default;
+  SerializeIF() = default;
+  SerializeIF& operator= ( const SerializeIF & ) = default;
+
   /**
    * @brief
    * Function to serialize the object into a buffer with maxSize. Size represents the written
diff --git a/src/fsfw/storagemanager/storeAddress.h b/src/fsfw/storagemanager/storeAddress.h
index a656cfe10..c3c37798d 100644
--- a/src/fsfw/storagemanager/storeAddress.h
+++ b/src/fsfw/storagemanager/storeAddress.h
@@ -22,7 +22,7 @@ union store_address_t {
    */
   explicit store_address_t(uint32_t rawAddress) : raw(rawAddress) {}
 
-  static store_address_t invalid() { return {}; };
+  static store_address_t invalid() { return {}; }
 
   /**
    * Constructor to create an address object using pool
diff --git a/src/fsfw/tasks/ExecutableObjectIF.h b/src/fsfw/tasks/ExecutableObjectIF.h
index 1e3f19e4e..f09563264 100644
--- a/src/fsfw/tasks/ExecutableObjectIF.h
+++ b/src/fsfw/tasks/ExecutableObjectIF.h
@@ -34,7 +34,7 @@ class ExecutableObjectIF {
    * a reference to the executing task
    * @param task_ Pointer to the taskIF of this task
    */
-  virtual void setTaskIF(PeriodicTaskIF* task_){};
+  virtual void setTaskIF(PeriodicTaskIF* task_){}
 
   /**
    * This function should be called after the object was assigned to a
diff --git a/src/fsfw/tmtcpacket/pus/RawUserDataReaderIF.h b/src/fsfw/tmtcpacket/pus/RawUserDataReaderIF.h
index 799b7940e..3bd497730 100644
--- a/src/fsfw/tmtcpacket/pus/RawUserDataReaderIF.h
+++ b/src/fsfw/tmtcpacket/pus/RawUserDataReaderIF.h
@@ -6,7 +6,7 @@
 
 class RawUserDataReaderIF {
  public:
-  ~RawUserDataReaderIF() = default;
+  virtual ~RawUserDataReaderIF() = default;
   [[nodiscard]] virtual const uint8_t* getUserData() const = 0;
   [[nodiscard]] virtual size_t getUserDataLen() const = 0;
 };