diff --git a/src/3rdparty/squirrel/squirrel/sqclass.h b/src/3rdparty/squirrel/squirrel/sqclass.h
--- a/src/3rdparty/squirrel/squirrel/sqclass.h
+++ b/src/3rdparty/squirrel/squirrel/sqclass.h
@@ -55,13 +55,13 @@ public:
 	bool SetAttributes(const SQObjectPtr &key,const SQObjectPtr &val);
 	bool GetAttributes(const SQObjectPtr &key,SQObjectPtr &outval);
 	void Lock() { _locked = true; if(_base) _base->Lock(); }
-	void Release() {
+	void Release() override {
 		if (_hook) { _hook(_typetag,0);}
 		sq_delete(this, SQClass);
 	}
-	void Finalize();
+	void Finalize() override;
 #ifndef NO_GARBAGE_COLLECTOR
-	void EnqueueMarkObjectForChildren(SQGCMarkerQueue &queue);
+	void EnqueueMarkObjectForChildren(SQGCMarkerQueue &queue) override;
 #endif
 	SQInteger Next(const SQObjectPtr &refpos, SQObjectPtr &outkey, SQObjectPtr &outval);
 	SQInstance *CreateInstance();
diff --git a/src/3rdparty/squirrel/squirrel/sqclosure.h b/src/3rdparty/squirrel/squirrel/sqclosure.h
--- a/src/3rdparty/squirrel/squirrel/sqclosure.h
+++ b/src/3rdparty/squirrel/squirrel/sqclosure.h
@@ -14,7 +14,7 @@ public:
 		new (nc) SQClosure(ss,func);
 		return nc;
 	}
-	void Release(){
+	void Release() override {
 		sq_delete(this,SQClosure);
 	}
 	SQClosure *Clone()
@@ -32,8 +32,8 @@ public:
 	bool Save(SQVM *v,SQUserPointer up,SQWRITEFUNC write);
 	static bool Load(SQVM *v,SQUserPointer up,SQREADFUNC read,SQObjectPtr &ret);
 #ifndef NO_GARBAGE_COLLECTOR
-	void EnqueueMarkObjectForChildren(SQGCMarkerQueue &queue);
-	void Finalize(){_outervalues.resize(0); }
+	void EnqueueMarkObjectForChildren(SQGCMarkerQueue &queue) override;
+	void Finalize() override {_outervalues.resize(0); }
 #endif
 	SQObjectPtr _env;
 	SQObjectPtr _function;
@@ -60,14 +60,14 @@ public:
 		_state=eDead;
 		_stack.resize(0);
 		_closure=_null_;}
-	void Release(){
+	void Release() override {
 		sq_delete(this,SQGenerator);
 	}
 	bool Yield(SQVM *v);
 	bool Resume(SQVM *v,SQInteger target);
 #ifndef NO_GARBAGE_COLLECTOR
-	void EnqueueMarkObjectForChildren(SQGCMarkerQueue &queue);
-	void Finalize(){_stack.resize(0);_closure=_null_;}
+	void EnqueueMarkObjectForChildren(SQGCMarkerQueue &queue) override;
+	void Finalize() override {_stack.resize(0);_closure=_null_;}
 #endif
 	SQObjectPtr _closure;
 	SQObjectPtrVec _stack;
@@ -102,12 +102,12 @@ public:
 	{
 		REMOVE_FROM_CHAIN(&_ss(this)->_gc_chain,this);
 	}
-	void Release(){
+	void Release() override {
 		sq_delete(this,SQNativeClosure);
 	}
 #ifndef NO_GARBAGE_COLLECTOR
-	void EnqueueMarkObjectForChildren(SQGCMarkerQueue &queue);
-	void Finalize(){_outervalues.resize(0);}
+	void EnqueueMarkObjectForChildren(SQGCMarkerQueue &queue) override;
+	void Finalize() override {_outervalues.resize(0);}
 #endif
 	SQInteger _nparamscheck;
 	SQIntVec _typecheck;
diff --git a/src/3rdparty/squirrel/squirrel/sqfuncproto.h b/src/3rdparty/squirrel/squirrel/sqfuncproto.h
--- a/src/3rdparty/squirrel/squirrel/sqfuncproto.h
+++ b/src/3rdparty/squirrel/squirrel/sqfuncproto.h
@@ -103,7 +103,7 @@ public:
 		new (f) SQFunctionProto(ninstructions, nliterals, nparameters, nfunctions, noutervalues, nlineinfos, nlocalvarinfos, ndefaultparams);
 		return f;
 	}
-	void Release(){
+	void Release() override {
 		_DESTRUCT_VECTOR(SQObjectPtr,_nliterals,_literals);
 		_DESTRUCT_VECTOR(SQObjectPtr,_nparameters,_parameters);
 		_DESTRUCT_VECTOR(SQObjectPtr,_nfunctions,_functions);
diff --git a/src/3rdparty/squirrel/squirrel/sqobject.h b/src/3rdparty/squirrel/squirrel/sqobject.h
--- a/src/3rdparty/squirrel/squirrel/sqobject.h
+++ b/src/3rdparty/squirrel/squirrel/sqobject.h
@@ -84,7 +84,7 @@ private:
 
 struct SQWeakRef : SQRefCounted
 {
-	void Release();
+	void Release() override;
 	SQObject _obj;
 };
 
@@ -362,7 +362,7 @@ struct SQCollectable : public SQRefCount
 	SQCollectable *_next;
 	SQCollectable *_prev;
 	SQSharedState *_sharedstate;
-	virtual void Release()=0;
+	void Release() override=0;
 	virtual void EnqueueMarkObjectForChildren(class SQGCMarkerQueue &queue)=0;
 	void UnMark();
 	virtual void Finalize()=0;
diff --git a/src/3rdparty/squirrel/squirrel/sqstring.h b/src/3rdparty/squirrel/squirrel/sqstring.h
--- a/src/3rdparty/squirrel/squirrel/sqstring.h
+++ b/src/3rdparty/squirrel/squirrel/sqstring.h
@@ -19,7 +19,7 @@ public:
 	static SQString *Create(SQSharedState *ss, const SQChar *, SQInteger len = -1 );
 	static SQString *Create(SQSharedState *ss, const std::string &str) { return Create(ss, str.data(), str.size()); }
 	SQInteger Next(const SQObjectPtr &refpos, SQObjectPtr &outkey, SQObjectPtr &outval);
-	void Release();
+	void Release() override;
 	SQSharedState *_sharedstate;
 	SQString *_next; //chain for the string table
 	SQInteger _len;
diff --git a/src/3rdparty/squirrel/squirrel/squserdata.h b/src/3rdparty/squirrel/squirrel/squserdata.h
--- a/src/3rdparty/squirrel/squirrel/squserdata.h
+++ b/src/3rdparty/squirrel/squirrel/squserdata.h
@@ -18,10 +18,10 @@ struct SQUserData : SQDelegable
 		return ud;
 	}
 #ifndef NO_GARBAGE_COLLECTOR
-	void EnqueueMarkObjectForChildren(SQGCMarkerQueue &queue);
-	void Finalize(){SetDelegate(nullptr);}
+	void EnqueueMarkObjectForChildren(SQGCMarkerQueue &queue) override;
+	void Finalize() override {SetDelegate(nullptr);}
 #endif
-	void Release() {
+	void Release() override {
 		if (_hook) _hook(_val,_size);
 		SQInteger tsize = _size - 1;
 		this->~SQUserData();
diff --git a/src/3rdparty/squirrel/squirrel/sqvm.h b/src/3rdparty/squirrel/squirrel/sqvm.h
--- a/src/3rdparty/squirrel/squirrel/sqvm.h
+++ b/src/3rdparty/squirrel/squirrel/sqvm.h
@@ -112,16 +112,16 @@ public:
 #endif
 
 #ifndef NO_GARBAGE_COLLECTOR
-	void EnqueueMarkObjectForChildren(SQGCMarkerQueue &queue);
+	void EnqueueMarkObjectForChildren(SQGCMarkerQueue &queue) override;
 #endif
-	void Finalize();
+	void Finalize() override;
 	void GrowCallStack() {
 		SQInteger newsize = _alloccallsstacksize*2;
 		_callstackdata.resize(newsize);
 		_callsstack = &_callstackdata[0];
 		_alloccallsstacksize = newsize;
 	}
-	void Release(){ sq_delete(this,SQVM); } //does nothing
+	void Release() override { sq_delete(this,SQVM); } //does nothing
 ////////////////////////////////////////////////////////////////////////////
 	//stack functions for the api
 	void Remove(SQInteger n);