diff --git a/src/lib/netlist/analog/nld_bjt.h b/src/lib/netlist/analog/nld_bjt.h
index 520321f2db2..07f5923c17c 100644
--- a/src/lib/netlist/analog/nld_bjt.h
+++ b/src/lib/netlist/analog/nld_bjt.h
@@ -47,9 +47,9 @@ public:
 	inline bool is_qtype(q_type atype) const { return m_qtype == atype; }
 	inline void set_qtype(q_type atype) { m_qtype = atype; }
 protected:
-	virtual void start();
-	virtual void reset();
-	ATTR_HOT void update();
+	virtual void start() override;
+	virtual void reset() override;
+	ATTR_HOT void update() override;
 
 	param_model_t m_model;
 private:
@@ -102,7 +102,7 @@ public:
 		m_gB(NETLIST_GMIN_DEFAULT), m_gC(NETLIST_GMIN_DEFAULT), m_V(0.0), m_state_on(0) { }
 
 
-	ATTR_HOT void virtual update();
+	ATTR_HOT void virtual update() override;
 
 	nld_twoterm m_RB;
 	nld_twoterm m_RC;
@@ -113,9 +113,9 @@ public:
 
 protected:
 
-	virtual void start();
-	ATTR_HOT virtual void update_param();
-	virtual void reset();
+	virtual void start() override;
+	ATTR_HOT virtual void update_param() override;
+	virtual void reset() override;
 	NETLIB_UPDATE_TERMINALSI();
 
 	nl_double m_gB; // base conductance / switch on
@@ -145,10 +145,10 @@ public:
 
 protected:
 
-	virtual void start();
-	virtual void reset();
-	ATTR_HOT void update_param();
-	ATTR_HOT void virtual update();
+	virtual void start() override;
+	virtual void reset() override;
+	ATTR_HOT void update_param() override;
+	ATTR_HOT void virtual update() override;
 	NETLIB_UPDATE_TERMINALSI();
 
 	generic_diode m_gD_BC;
diff --git a/src/lib/netlist/analog/nld_fourterm.h b/src/lib/netlist/analog/nld_fourterm.h
index 591df68dd79..7bed4e71a52 100644
--- a/src/lib/netlist/analog/nld_fourterm.h
+++ b/src/lib/netlist/analog/nld_fourterm.h
@@ -63,10 +63,10 @@ public:
 	param_double_t m_RI;
 
 protected:
-	virtual void start();
-	virtual void reset();
-	virtual void update_param();
-	ATTR_HOT virtual void update();
+	virtual void start() override;
+	virtual void reset() override;
+	virtual void update_param() override;
+	ATTR_HOT virtual void update() override;
 
 	ATTR_COLD void start_internal(const nl_double def_RI);
 
@@ -95,10 +95,10 @@ public:
 	param_double_t m_cur_limit; /* current limit */
 
 protected:
-	virtual void start();
-	virtual void reset();
-	virtual void update_param();
-	ATTR_HOT virtual void update();
+	virtual void start() override;
+	virtual void reset() override;
+	virtual void update_param() override;
+	ATTR_HOT virtual void update() override;
 	NETLIB_UPDATE_TERMINALSI();
 
 	nl_double m_vi;
@@ -134,10 +134,10 @@ public:
 	: NETLIB_NAME(VCCS)(CCCS), m_gfac(1.0) {  }
 
 protected:
-	virtual void start();
-	virtual void reset();
-	virtual void update_param();
-	ATTR_HOT void update();
+	virtual void start() override;
+	virtual void reset() override;
+	virtual void update_param() override;
+	ATTR_HOT void update() override;
 
 	nl_double m_gfac;
 };
@@ -180,9 +180,9 @@ public:
 	param_double_t m_RO;
 
 protected:
-	virtual void start();
-	virtual void reset();
-	virtual void update_param();
+	virtual void start() override;
+	virtual void reset() override;
+	virtual void update_param() override;
 	//ATTR_HOT void update();
 
 	terminal_t m_OP2;
diff --git a/src/lib/netlist/analog/nld_twoterm.h b/src/lib/netlist/analog/nld_twoterm.h
index 27da8ba258e..9a716094163 100644
--- a/src/lib/netlist/analog/nld_twoterm.h
+++ b/src/lib/netlist/analog/nld_twoterm.h
@@ -133,9 +133,9 @@ public:
 	}
 
 protected:
-	virtual void start();
-	virtual void reset();
-	ATTR_HOT void update();
+	virtual void start() override;
+	virtual void reset() override;
+	ATTR_HOT void update() override;
 
 private:
 };
@@ -155,9 +155,9 @@ public:
 	}
 
 protected:
-	virtual void start();
-	virtual void reset();
-	ATTR_HOT void update();
+	virtual void start() override;
+	virtual void reset() override;
+	ATTR_HOT void update() override;
 };
 
 NETLIB_DEVICE_WITH_PARAMS_DERIVED(R, R_base,
@@ -196,15 +196,15 @@ class NETLIB_NAME(C) : public NETLIB_NAME(twoterm)
 public:
 	ATTR_COLD NETLIB_NAME(C)() : NETLIB_NAME(twoterm)(CAPACITOR), m_GParallel(0.0) { }
 
-	ATTR_HOT void step_time(const nl_double st);
+	ATTR_HOT void step_time(const nl_double st) override;
 
 	param_double_t m_C;
 
 protected:
-	virtual void start();
-	virtual void reset();
-	virtual void update_param();
-	ATTR_HOT void update();
+	virtual void start() override;
+	virtual void reset() override;
+	virtual void update_param() override;
+	ATTR_HOT void update() override;
 
 private:
 	nl_double m_GParallel;
@@ -298,9 +298,9 @@ public:
 	param_model_t m_model;
 
 protected:
-	virtual void start();
-	virtual void update_param();
-	ATTR_HOT void update();
+	virtual void start() override;
+	virtual void update_param() override;
+	ATTR_HOT void update() override;
 
 	generic_diode m_D;
 };
@@ -317,9 +317,9 @@ public:
 	ATTR_COLD NETLIB_NAME(VS)() : NETLIB_NAME(twoterm)(VS) { }
 
 protected:
-	virtual void start();
-	virtual void reset();
-	ATTR_HOT void update();
+	virtual void start() override;
+	virtual void reset() override;
+	ATTR_HOT void update() override;
 
 	param_double_t m_R;
 	param_double_t m_V;
@@ -335,9 +335,9 @@ public:
 	ATTR_COLD NETLIB_NAME(CS)() : NETLIB_NAME(twoterm)(CS) { }
 
 protected:
-	virtual void start();
-	virtual void reset();
-	ATTR_HOT void update();
+	virtual void start() override;
+	virtual void reset() override;
+	ATTR_HOT void update() override;
 
 	param_double_t m_I;
 };
diff --git a/src/lib/netlist/devices/nld_cmos.h b/src/lib/netlist/devices/nld_cmos.h
index 6883993a794..61e1e8f7dae 100644
--- a/src/lib/netlist/devices/nld_cmos.h
+++ b/src/lib/netlist/devices/nld_cmos.h
@@ -24,13 +24,13 @@ class nld_vdd_vss : public device_t
 		analog_input_t m_vss;
 
 	protected:
-		ATTR_HOT void update() {};
-		ATTR_HOT void start()
+		ATTR_HOT void update() override {};
+		ATTR_HOT void start() override
 		{
 			register_input("VDD", m_vdd);
 			register_input("VSS", m_vss);
 		};
-		ATTR_HOT void reset()  {};
+		ATTR_HOT void reset() override  {};
 
 public:
 	ATTR_HOT inline nl_double vdd() { return INPANALOG(m_vdd); }
diff --git a/src/lib/netlist/devices/nld_signal.h b/src/lib/netlist/devices/nld_signal.h
index fa8e9e6265b..0e659557e02 100644
--- a/src/lib/netlist/devices/nld_signal.h
+++ b/src/lib/netlist/devices/nld_signal.h
@@ -37,7 +37,7 @@ public:
 	{
 	}
 
-	void start()
+	void start() override
 	{
 		const char *sIN[8] = { "A", "B", "C", "D", "E", "F", "G", "H" };
 
@@ -49,7 +49,7 @@ public:
 		save(NLNAME(m_active));
 	}
 
-	void reset()
+	void reset() override
 	{
 		m_Q[0].initial(0);
 		m_active = 1;
@@ -72,7 +72,7 @@ public:
 		return _check ^ _invert;
 	}
 
-	ATTR_HOT virtual void inc_active()
+	ATTR_HOT virtual void inc_active() override
 	{
 		const netlist_time times[2] = { NLTIME_FROM_NS(15), NLTIME_FROM_NS(22)};
 		nl_assert(netlist().use_deactivate());
@@ -90,7 +90,7 @@ public:
 		}
 	}
 
-	ATTR_HOT virtual void dec_active()
+	ATTR_HOT virtual void dec_active() override
 	{
 		nl_assert(netlist().use_deactivate());
 		if (--m_active == 0)
@@ -100,7 +100,7 @@ public:
 		}
 	}
 
-	virtual void update()
+	virtual void update() override
 	{
 		const netlist_time times[2] = { NLTIME_FROM_NS(15), NLTIME_FROM_NS(22)};
 
diff --git a/src/lib/netlist/devices/nld_system.h b/src/lib/netlist/devices/nld_system.h
index 2ea6fbed4d4..a50860c3ac4 100644
--- a/src/lib/netlist/devices/nld_system.h
+++ b/src/lib/netlist/devices/nld_system.h
@@ -136,7 +136,7 @@ NETLIB_DEVICE_WITH_PARAMS(extclock,
 
 NETLIB_DEVICE_WITH_PARAMS(logic_input,
 
-	virtual void stop();
+	virtual void stop() override;
 	logic_output_t m_Q;
 
 	param_logic_t m_IN;
@@ -163,16 +163,16 @@ public:
 
 protected:
 
-	void start()
+	void start() override
 	{
 		register_output("Q", m_Q);
 	}
 
-	void reset()
+	void reset() override
 	{
 	}
 
-	void update()
+	void update() override
 	{
 		OUTANALOG(m_Q, 0.0);
 	}
@@ -196,16 +196,16 @@ public:
 
 protected:
 
-	void start()
+	void start() override
 	{
 		register_input("I", m_I);
 	}
 
-	void reset()
+	void reset() override
 	{
 	}
 
-	void update()
+	void update() override
 	{
 	}
 
@@ -228,7 +228,7 @@ public:
 
 protected:
 
-	void start()
+	void start() override
 	{
 		register_param("RIN", m_p_RIN, 1.0e6);
 		register_param("ROUT", m_p_ROUT, 50.0);
@@ -244,13 +244,13 @@ protected:
 		connect_late(m_Q, m_ROUT.m_P);
 	}
 
-	void reset()
+	void reset() override
 	{
 		m_RIN.set(1.0 / m_p_RIN.Value(),0,0);
 		m_ROUT.set(1.0 / m_p_ROUT.Value(),0,0);
 	}
 
-	void update()
+	void update() override
 	{
 		OUTANALOG(m_Q, INPANALOG(m_I));
 	}
@@ -281,9 +281,9 @@ public:
 
 protected:
 
-	void start();
-	void reset();
-	void update();
+	void start() override;
+	void reset() override;
+	void update() override;
 
 private:
 
@@ -331,10 +331,10 @@ public:
 
 protected:
 
-	void start();
-	void reset();
-	ATTR_HOT void update();
-	ATTR_HOT void update_param();
+	void start() override;
+	void reset() override;
+	ATTR_HOT void update() override;
+	ATTR_HOT void update_param() override;
 
 private:
 	UINT8 m_last_state;
@@ -391,17 +391,17 @@ public:
 	logic_output_t m_Q;
 
 protected:
-	void start()
+	void start() override
 	{
 		register_input("I", m_I);
 		register_output("Q", m_Q);
 	}
 
-	void reset()
+	void reset() override
 	{
 	}
 
-	ATTR_HOT void update()
+	ATTR_HOT void update() override
 	{
 		if (m_I.Q_Analog() > logic_family().m_high_thresh_V)
 			OUTLOGIC(m_Q, 1, NLTIME_FROM_NS(1));
@@ -432,7 +432,7 @@ protected:
 	{
 	}
 
-	virtual void start()
+	virtual void start() override
 	{
 		register_input("I", m_I);
 	}
@@ -456,11 +456,11 @@ public:
 	virtual ~nld_d_to_a_proxy() {}
 
 protected:
-	virtual void start();
+	virtual void start() override;
 
-	virtual void reset();
+	virtual void reset() override;
 
-	ATTR_HOT void update();
+	ATTR_HOT void update() override;
 
 private:
 	analog_output_t m_Q;
@@ -484,20 +484,20 @@ public:
 	public:
 		dummy(const pstring &dev_name) : device_t(), m_dev_name(dev_name) { }
 	protected:
-		virtual void init(netlist_t &anetlist, const pstring &aname)
+		virtual void init(netlist_t &anetlist, const pstring &aname) override
 		{
 			anetlist.setup().namespace_push(aname);
 			anetlist.setup().include(m_dev_name);
 			anetlist.setup().namespace_pop();
 		}
-		void start() { }
-		void reset() { }
-		void update() { }
+		void start() override { }
+		void reset() override { }
+		void update() override { }
 
 		pstring m_dev_name;
 	};
 
-	ATTR_COLD device_t *Create()
+	ATTR_COLD device_t *Create() override
 	{
 		device_t *r = palloc(dummy(this->name()));
 		return r;
diff --git a/src/lib/netlist/devices/nld_truthtable.h b/src/lib/netlist/devices/nld_truthtable.h
index b5a90d8125c..47e479a0256 100644
--- a/src/lib/netlist/devices/nld_truthtable.h
+++ b/src/lib/netlist/devices/nld_truthtable.h
@@ -126,7 +126,7 @@ public:
 		m_desc = desc;
 	}
 
-	virtual void start()
+	virtual void start() override
 	{
 		pstring header = m_desc[0];
 
@@ -181,7 +181,7 @@ public:
 		save(NLNAME(m_active));
 	}
 
-	void reset()
+	void reset() override
 	{
 		m_active = 0;
 		m_ign = 0;
@@ -242,12 +242,12 @@ public:
 		}
 	}
 
-	ATTR_HOT void update()
+	ATTR_HOT void update() override
 	{
 		process<true>();
 	}
 
-	ATTR_HOT void inc_active()
+	ATTR_HOT void inc_active() override
 	{
 		nl_assert(netlist().use_deactivate());
 		if (has_state == 0)
@@ -257,7 +257,7 @@ public:
 			}
 	}
 
-	ATTR_HOT void dec_active()
+	ATTR_HOT void dec_active() override
 	{
 		nl_assert(netlist().use_deactivate());
 		/* FIXME:
@@ -321,7 +321,7 @@ public:
 			const pstring &def_param)
 	: netlist_base_factory_truthtable_t(name, classname, def_param) { }
 
-	device_t *Create()
+	device_t *Create() override
 	{
 		typedef nld_truthtable_t<m_NI, m_NO, has_state> tt_type;
 		device_t *r = palloc(tt_type(&m_ttbl, m_desc));
diff --git a/src/lib/netlist/nl_base.cpp b/src/lib/netlist/nl_base.cpp
index ce818e0d94f..f39de181da1 100644
--- a/src/lib/netlist/nl_base.cpp
+++ b/src/lib/netlist/nl_base.cpp
@@ -37,7 +37,7 @@ public:
 		m_R_high = 130.0;
 		m_is_static = true;
 	}
-	virtual devices::nld_base_d_to_a_proxy *create_d_a_proxy(logic_output_t *proxied) const
+	virtual devices::nld_base_d_to_a_proxy *create_d_a_proxy(logic_output_t *proxied) const override
 	{
 		return palloc(devices::nld_d_to_a_proxy(proxied));
 	}
@@ -58,7 +58,7 @@ public:
 		m_R_high = 10.0;
 		m_is_static = true;
 	}
-	virtual devices::nld_base_d_to_a_proxy *create_d_a_proxy(logic_output_t *proxied) const
+	virtual devices::nld_base_d_to_a_proxy *create_d_a_proxy(logic_output_t *proxied) const override
 	{
 		return palloc(devices::nld_d_to_a_proxy(proxied));
 	}
diff --git a/src/lib/netlist/nl_base.h b/src/lib/netlist/nl_base.h
index 4bc152e253f..a47ca7c6fc5 100644
--- a/src/lib/netlist/nl_base.h
+++ b/src/lib/netlist/nl_base.h
@@ -190,7 +190,7 @@ typedef UINT8 netlist_sig_t;
 #define NETLIB_FUNC_VOID(_chip, _name, _params) ATTR_HOT void NETLIB_NAME(_chip) :: _name _params
 
 #define NETLIB_UPDATE_TERMINALS(_chip) ATTR_HOT void NETLIB_NAME(_chip) :: update_terminals(void)
-#define NETLIB_UPDATE_TERMINALSI() ATTR_HOT void update_terminals(void)
+#define NETLIB_UPDATE_TERMINALSI() ATTR_HOT void update_terminals(void) override
 #define NETLIB_UPDATEI() ATTR_HOT void update(void)
 
 #define NETLIB_DEVICE_BASE(_name, _pclass, _extra, _priv)                       \
@@ -201,9 +201,9 @@ typedef UINT8 netlist_sig_t;
 		: _pclass()    { }                                                      \
 	protected:                                                                  \
 		_extra                                                                  \
-		ATTR_HOT void update();                                                 \
-		ATTR_HOT void start();                                                  \
-		ATTR_HOT void reset();                                                  \
+		ATTR_HOT void update() override;                                        \
+		ATTR_HOT void start() override;                                         \
+		ATTR_HOT void reset() override;                                         \
 		_priv                                                                   \
 	}
 
@@ -224,25 +224,25 @@ typedef UINT8 netlist_sig_t;
 		: device_t()                                                            \
 			{ }                                                                 \
 	/*protected:*/                                                              \
-		ATTR_HOT void update();                                                 \
-		ATTR_HOT void start();                                                  \
-		ATTR_HOT void reset();                                                  \
+		ATTR_HOT void update() override;                                        \
+		ATTR_HOT void start() override;                                         \
+		ATTR_HOT void reset() override;                                         \
 	public:                                                                     \
 		_priv                                                                   \
 	}
 
 #define NETLIB_DEVICE_WITH_PARAMS(_name, _priv)                                 \
 		NETLIB_DEVICE_BASE(NETLIB_NAME(_name), device_t,                        \
-			ATTR_HOT void update_param();                                       \
+			ATTR_HOT void update_param() override;                              \
 		, _priv)
 
 #define NETLIB_DEVICE_WITH_PARAMS_DERIVED(_name, _pclass, _priv)                \
 		NETLIB_DEVICE_BASE(NETLIB_NAME(_name), NETLIB_NAME(_pclass),            \
-			ATTR_HOT void update_param();                                       \
+			ATTR_HOT void update_param() override;                              \
 		, _priv)
 
 #define NETLIB_LOGIC_FAMILY(_fam)                                               \
-virtual logic_family_desc_t *default_logic_family()                             \
+virtual logic_family_desc_t *default_logic_family() override                    \
 {                                                                               \
 	return netlist_family_ ## _fam;                                             \
 }
@@ -497,7 +497,7 @@ namespace netlist
 		ATTR_HOT /* inline */ void update_dev(const UINT32 mask);
 
 	protected:
-		virtual void save_register()
+		virtual void save_register() override
 		{
 			save(NLNAME(m_state));
 			device_object_t::save_register();
@@ -548,9 +548,9 @@ namespace netlist
 		terminal_t *m_otherterm;
 
 	protected:
-		virtual void save_register();
+		virtual void save_register() override;
 
-		virtual void reset();
+		virtual void reset() override;
 	private:
 		ATTR_HOT  void set_ptr(nl_double *ptr, const nl_double val)
 		{
@@ -624,7 +624,7 @@ namespace netlist
 		ATTR_HOT  void activate_lh();
 
 	protected:
-		virtual void reset()
+		virtual void reset() override
 		{
 			//netlist_core_terminal_t::reset();
 			set_state(STATE_INP_ACTIVE);
@@ -648,7 +648,7 @@ namespace netlist
 		ATTR_HOT  nl_double Q_Analog() const;
 
 	protected:
-		virtual void reset()
+		virtual void reset() override
 		{
 			//netlist_core_terminal_t::reset();
 			set_state(STATE_INP_ACTIVE);
@@ -716,8 +716,8 @@ namespace netlist
 
 	protected:  //FIXME: needed by current solver code
 
-		virtual void save_register();
-		virtual void reset();
+		virtual void save_register() override;
+		virtual void reset() override;
 
 		netlist_sig_t m_new_Q;
 		netlist_sig_t m_cur_Q;
@@ -789,8 +789,8 @@ namespace netlist
 
 	protected:  //FIXME: needed by current solver code
 
-		virtual void save_register();
-		virtual void reset();
+		virtual void save_register() override;
+		virtual void reset() override;
 
 
 	private:
@@ -826,8 +826,8 @@ namespace netlist
 
 	protected:
 
-		virtual void save_register();
-		virtual void reset();
+		virtual void save_register() override;
+		virtual void reset() override;
 
 
 	private:
@@ -852,7 +852,7 @@ namespace netlist
 		ATTR_COLD logic_output_t();
 
 		ATTR_COLD void init_object(core_device_t &dev, const pstring &aname);
-		virtual void reset()
+		virtual void reset() override
 		{
 			set_state(STATE_OUT);
 		}
@@ -876,7 +876,7 @@ namespace netlist
 		ATTR_COLD analog_output_t();
 
 		ATTR_COLD void init_object(core_device_t &dev, const pstring &aname);
-		virtual void reset()
+		virtual void reset() override
 		{
 			set_state(STATE_OUT);
 		}
@@ -914,7 +914,7 @@ namespace netlist
 
 	protected:
 
-		virtual void reset() { }
+		virtual void reset() override { }
 
 	private:
 		const param_type_t m_param_type;
@@ -938,7 +938,7 @@ namespace netlist
 		ATTR_HOT  C Value() const { return m_param;   }
 
 	protected:
-		virtual void save_register()
+		virtual void save_register() override
 		{
 			/* pstrings not yet supported, these need special logic */
 			if (T != param_t::STRING && T != param_t::MODEL)
@@ -973,7 +973,7 @@ namespace netlist
 		ATTR_COLD const pstring model_value_str(const pstring &entity);
 		ATTR_COLD const pstring model_type();
 	protected:
-		void changed()
+		void changed() override
 		{
 			m_map.clear();
 		}
@@ -1089,7 +1089,7 @@ namespace netlist
 
 		virtual ~device_t();
 
-		virtual void init(netlist_t &anetlist, const pstring &name);
+		virtual void init(netlist_t &anetlist, const pstring &name) override;
 
 		ATTR_COLD setup_t &setup();
 
@@ -1110,9 +1110,9 @@ namespace netlist
 
 	protected:
 
-		ATTR_HOT virtual void update() { }
-		ATTR_HOT virtual void start() { }
-		ATTR_HOT virtual void update_terminals() { }
+		ATTR_HOT virtual void update() override { }
+		ATTR_HOT virtual void start() override { }
+		ATTR_HOT virtual void update_terminals() override { }
 
 		template <class C, class T>
 		ATTR_COLD void register_param(const pstring &sname, C &param, const T initialVal);
@@ -1134,11 +1134,11 @@ namespace netlist
 
 	protected:
 
-		void reset() {}
+		void reset() override {}
 
-		void register_state(pstate_manager_t &manager, const pstring &module);
-		void on_pre_save();
-		void on_post_load();
+		void register_state(pstate_manager_t &manager, const pstring &module) override;
+		void on_pre_save() override;
+		void on_post_load() override;
 
 	private:
 		struct names_t { char m_buf[64]; };
@@ -1243,8 +1243,8 @@ namespace netlist
 		//  virtual void vlog(const plog_level &l, const pstring &ls) = 0;
 
 		/* from netlist_object */
-		virtual void reset();
-		virtual void save_register();
+		virtual void reset() override;
+		virtual void save_register() override;
 
 	#if (NL_KEEP_STATISTICS)
 		// performance
diff --git a/src/lib/netlist/nl_factory.h b/src/lib/netlist/nl_factory.h
index b758941dd71..cc007960c6e 100644
--- a/src/lib/netlist/nl_factory.h
+++ b/src/lib/netlist/nl_factory.h
@@ -54,7 +54,7 @@ namespace netlist
 				const pstring &def_param)
 		: base_factory_t(name, classname, def_param) { }
 
-		ATTR_COLD device_t *Create()
+		ATTR_COLD device_t *Create() override
 		{
 			device_t *r = palloc(C);
 			//r->init(setup, name);
diff --git a/src/lib/netlist/nl_parser.h b/src/lib/netlist/nl_parser.h
index 73c6cf66837..b11d89f5ff1 100644
--- a/src/lib/netlist/nl_parser.h
+++ b/src/lib/netlist/nl_parser.h
@@ -42,7 +42,7 @@ namespace netlist
 		/* for debugging messages */
 		netlist_t &netlist() { return m_setup.netlist(); }
 
-		virtual void verror(const pstring &msg, int line_num, const pstring &line);
+		virtual void verror(const pstring &msg, int line_num, const pstring &line) override;
 	private:
 
 		nl_double eval_param(const token_t tok);
diff --git a/src/lib/netlist/nl_setup.cpp b/src/lib/netlist/nl_setup.cpp
index 94cb85ced03..99874a0a06d 100644
--- a/src/lib/netlist/nl_setup.cpp
+++ b/src/lib/netlist/nl_setup.cpp
@@ -886,7 +886,7 @@ class logic_family_std_proxy_t : public logic_family_desc_t
 {
 public:
 	logic_family_std_proxy_t() { }
-	virtual devices::nld_base_d_to_a_proxy *create_d_a_proxy(logic_output_t *proxied) const
+	virtual devices::nld_base_d_to_a_proxy *create_d_a_proxy(logic_output_t *proxied) const override
 	{
 		return palloc(devices::nld_d_to_a_proxy(proxied));
 	}
diff --git a/src/lib/netlist/nl_setup.h b/src/lib/netlist/nl_setup.h
index 5f056439b3b..4dd12b59854 100644
--- a/src/lib/netlist/nl_setup.h
+++ b/src/lib/netlist/nl_setup.h
@@ -252,7 +252,7 @@ namespace netlist
 		{
 		}
 
-		bool parse(setup_t &setup, const pstring &name);
+		bool parse(setup_t &setup, const pstring &name) override;
 
 	private:
 		pstring m_str;
@@ -267,7 +267,7 @@ namespace netlist
 		{
 		}
 
-		bool parse(setup_t &setup, const pstring &name);
+		bool parse(setup_t &setup, const pstring &name) override;
 
 	private:
 		pstring m_filename;
@@ -281,7 +281,7 @@ namespace netlist
 		{
 		}
 
-		bool parse(setup_t &setup, const pstring &name);
+		bool parse(setup_t &setup, const pstring &name) override;
 
 	private:
 		pstring m_str;
@@ -297,7 +297,7 @@ namespace netlist
 		{
 		}
 
-		bool parse(setup_t &setup, const pstring &name)
+		bool parse(setup_t &setup, const pstring &name) override
 		{
 			if (name == m_setup_func_name)
 			{
diff --git a/src/lib/netlist/plib/pfmtlog.h b/src/lib/netlist/plib/pfmtlog.h
index 058152a91cc..7a63d14fc3a 100644
--- a/src/lib/netlist/plib/pfmtlog.h
+++ b/src/lib/netlist/plib/pfmtlog.h
@@ -158,7 +158,7 @@ public:
 
 
 protected:
-	void format_element(const char *f, const char *l, const char *fmt_spec, ...);
+	void format_element(const char *f, const char *l, const char *fmt_spec, ...) override;
 
 private:
 
@@ -243,7 +243,7 @@ public:
 	virtual ~plog_channel() { }
 
 protected:
-	virtual void vdowrite(const pstring &ls) const;
+	virtual void vdowrite(const pstring &ls) const override;
 
 private:
 	plog_dispatch_intf *m_base;
diff --git a/src/lib/netlist/plib/poptions.h b/src/lib/netlist/plib/poptions.h
index b082504930d..c6daa3b2596 100644
--- a/src/lib/netlist/plib/poptions.h
+++ b/src/lib/netlist/plib/poptions.h
@@ -52,7 +52,7 @@ public:
 	: poption(ashort, along, help, true, parent), m_val(defval)
 	{}
 
-	virtual int parse(pstring argument) { m_val = argument; return 0; }
+	virtual int parse(pstring argument) override { m_val = argument; return 0; }
 
 	pstring operator ()() { return m_val; }
 private:
@@ -66,7 +66,7 @@ public:
 	: poption(ashort, along, help, true, parent), m_val(defval), m_limit(limit, ":")
 	{}
 
-	virtual int parse(pstring argument)
+	virtual int parse(pstring argument) override
 	{
 		if (m_limit.contains(argument))
 		{
@@ -90,7 +90,7 @@ public:
 	: poption(ashort, along, help, false, parent), m_val(false)
 	{}
 
-	virtual int parse(ATTR_UNUSED pstring argument) { m_val = true; return 0; }
+	virtual int parse(ATTR_UNUSED pstring argument) override { m_val = true; return 0; }
 
 	bool operator ()() { return m_val; }
 private:
@@ -104,7 +104,7 @@ public:
 	: poption(ashort, along, help, true, parent), m_val(defval)
 	{}
 
-	virtual int parse(pstring argument)
+	virtual int parse(pstring argument) override
 	{
 		bool err = false;
 		m_val = argument.as_double(&err);
diff --git a/src/lib/netlist/plib/pstream.h b/src/lib/netlist/plib/pstream.h
index 61f0959cadd..6cc4c6a30a7 100644
--- a/src/lib/netlist/plib/pstream.h
+++ b/src/lib/netlist/plib/pstream.h
@@ -184,9 +184,9 @@ public:
 
 protected:
 	/* write n bytes to stream */
-	virtual void vwrite(const void *buf, const unsigned n);
-	virtual void vseek(const pos_type n);
-	virtual pos_type vtell();
+	virtual void vwrite(const void *buf, const unsigned n) override;
+	virtual void vseek(const pos_type n) override;
+	virtual pos_type vtell() override;
 
 private:
 	pos_type m_pos;
@@ -208,12 +208,12 @@ public:
 
 protected:
 	/* write n bytes to stream */
-	virtual void vwrite(const void *buf, const unsigned n)
+	virtual void vwrite(const void *buf, const unsigned n) override
 	{
 		m_buf.cat(buf, n);
 	}
-	virtual void vseek(const pos_type n) { }
-	virtual pos_type vtell() { return m_buf.len(); }
+	virtual void vseek(const pos_type n) override { }
+	virtual pos_type vtell() override { return m_buf.len(); }
 
 private:
 	pstringbuffer m_buf;
@@ -236,9 +236,9 @@ public:
 protected:
 	pofilestream(void *file, const bool do_close);
 	/* write n bytes to stream */
-	virtual void vwrite(const void *buf, const unsigned n);
-	virtual void vseek(const pos_type n);
-	virtual pos_type vtell();
+	virtual void vwrite(const void *buf, const unsigned n) override;
+	virtual void vseek(const pos_type n) override;
+	virtual pos_type vtell() override;
 
 private:
 	void *m_file;
@@ -288,9 +288,9 @@ protected:
 	pifilestream(void *file, const bool do_close);
 
 	/* read up to n bytes from stream */
-	virtual unsigned vread(void *buf, const unsigned n);
-	virtual void vseek(const pos_type n);
-	virtual pos_type vtell();
+	virtual unsigned vread(void *buf, const unsigned n) override;
+	virtual void vseek(const pos_type n) override;
+	virtual pos_type vtell() override;
 
 private:
 	void *m_file;
@@ -327,9 +327,9 @@ public:
 
 protected:
 	/* read up to n bytes from stream */
-	virtual unsigned vread(void *buf, const unsigned n);
-	virtual void vseek(const pos_type n);
-	virtual pos_type vtell();
+	virtual unsigned vread(void *buf, const unsigned n) override;
+	virtual void vseek(const pos_type n) override;
+	virtual pos_type vtell() override;
 
 private:
 	pos_type m_pos;
@@ -366,7 +366,7 @@ public:
 	virtual ~pstream_fmt_writer_t() { }
 
 protected:
-	virtual void vdowrite(const pstring &ls) const
+	virtual void vdowrite(const pstring &ls) const override
 	{
 		m_strm.write(ls);
 	}
diff --git a/src/lib/netlist/prg/nltool.cpp b/src/lib/netlist/prg/nltool.cpp
index 3510f70e7f2..bbe5e8b3039 100644
--- a/src/lib/netlist/prg/nltool.cpp
+++ b/src/lib/netlist/prg/nltool.cpp
@@ -194,7 +194,7 @@ public:
 
 protected:
 
-	void vlog(const plog_level &l, const pstring &ls) const
+	void vlog(const plog_level &l, const pstring &ls) const override
 	{
 		pout("{}: {}\n", l.name().cstr(), ls.cstr());
 		if (l == plog_level::FATAL)
diff --git a/src/lib/netlist/solver/nld_ms_direct.h b/src/lib/netlist/solver/nld_ms_direct.h
index 9116f92d53f..8bb578ec6cd 100644
--- a/src/lib/netlist/solver/nld_ms_direct.h
+++ b/src/lib/netlist/solver/nld_ms_direct.h
@@ -28,17 +28,17 @@ public:
 
 	virtual ~matrix_solver_direct_t();
 
-	virtual void vsetup(analog_net_t::list_t &nets);
-	virtual void reset() { matrix_solver_t::reset(); }
+	virtual void vsetup(analog_net_t::list_t &nets) override;
+	virtual void reset() override { matrix_solver_t::reset(); }
 
 	ATTR_HOT inline unsigned N() const { if (m_N == 0) return m_dim; else return m_N; }
 
 	ATTR_HOT inline int vsolve_non_dynamic(const bool newton_raphson);
 
 protected:
-	virtual void add_term(int net_idx, terminal_t *term);
+	virtual void add_term(int net_idx, terminal_t *term) override;
 
-	ATTR_HOT virtual nl_double vsolve();
+	ATTR_HOT virtual nl_double vsolve() override;
 
 	ATTR_HOT int solve_non_dynamic(const bool newton_raphson);
 	ATTR_HOT void build_LE_A();
diff --git a/src/lib/netlist/solver/nld_ms_direct1.h b/src/lib/netlist/solver/nld_ms_direct1.h
index 9f895a6c3f3..3aa79de45da 100644
--- a/src/lib/netlist/solver/nld_ms_direct1.h
+++ b/src/lib/netlist/solver/nld_ms_direct1.h
@@ -22,7 +22,7 @@ public:
 		{}
 	ATTR_HOT inline int vsolve_non_dynamic(const bool newton_raphson);
 protected:
-	ATTR_HOT virtual nl_double vsolve();
+	ATTR_HOT virtual nl_double vsolve() override;
 private:
 };
 
diff --git a/src/lib/netlist/solver/nld_ms_direct2.h b/src/lib/netlist/solver/nld_ms_direct2.h
index f78c36770e6..06f00302d3c 100644
--- a/src/lib/netlist/solver/nld_ms_direct2.h
+++ b/src/lib/netlist/solver/nld_ms_direct2.h
@@ -22,7 +22,7 @@ public:
 		{}
 	ATTR_HOT inline int vsolve_non_dynamic(const bool newton_raphson);
 protected:
-	ATTR_HOT virtual nl_double vsolve();
+	ATTR_HOT virtual nl_double vsolve() override;
 private:
 };
 
diff --git a/src/lib/netlist/solver/nld_ms_direct_lu.h b/src/lib/netlist/solver/nld_ms_direct_lu.h
index d988942058e..877e0b56cd8 100644
--- a/src/lib/netlist/solver/nld_ms_direct_lu.h
+++ b/src/lib/netlist/solver/nld_ms_direct_lu.h
@@ -30,17 +30,17 @@ public:
 
 	virtual ~matrix_solver_direct_t();
 
-	virtual void vsetup(analog_net_t::list_t &nets);
-	virtual void reset() { matrix_solver_t::reset(); }
+	virtual void vsetup(analog_net_t::list_t &nets) override;
+	virtual void reset() override { matrix_solver_t::reset(); }
 
 	ATTR_HOT inline unsigned N() const { if (m_N == 0) return m_dim; else return m_N; }
 
 	ATTR_HOT inline int vsolve_non_dynamic(const bool newton_raphson);
 
 protected:
-	virtual void add_term(int net_idx, terminal_t *term);
+	virtual void add_term(int net_idx, terminal_t *term) override;
 
-	ATTR_HOT virtual nl_double vsolve();
+	ATTR_HOT virtual nl_double vsolve() override;
 
 	ATTR_HOT int solve_non_dynamic(const bool newton_raphson);
 	ATTR_HOT void build_LE_A();
diff --git a/src/lib/netlist/solver/nld_ms_gmres.h b/src/lib/netlist/solver/nld_ms_gmres.h
index 5983cb1a968..6124f7e527d 100644
--- a/src/lib/netlist/solver/nld_ms_gmres.h
+++ b/src/lib/netlist/solver/nld_ms_gmres.h
@@ -53,10 +53,10 @@ public:
 			delete[] m_v[i];
 	}
 
-	virtual void vsetup(analog_net_t::list_t &nets);
+	virtual void vsetup(analog_net_t::list_t &nets) override;
 	ATTR_HOT virtual int vsolve_non_dynamic(const bool newton_raphson);
 protected:
-	ATTR_HOT virtual nl_double vsolve();
+	ATTR_HOT virtual nl_double vsolve() override;
 
 private:
 
diff --git a/src/lib/netlist/solver/nld_ms_sor.h b/src/lib/netlist/solver/nld_ms_sor.h
index 41074284152..59b1efffca7 100644
--- a/src/lib/netlist/solver/nld_ms_sor.h
+++ b/src/lib/netlist/solver/nld_ms_sor.h
@@ -32,10 +32,10 @@ public:
 
 	virtual ~matrix_solver_SOR_t() {}
 
-	virtual void vsetup(analog_net_t::list_t &nets);
+	virtual void vsetup(analog_net_t::list_t &nets) override;
 	ATTR_HOT virtual int vsolve_non_dynamic(const bool newton_raphson);
 protected:
-	ATTR_HOT virtual nl_double vsolve();
+	ATTR_HOT virtual nl_double vsolve() override;
 
 private:
 	nl_double m_lp_fact;
diff --git a/src/lib/netlist/solver/nld_ms_sor_mat.h b/src/lib/netlist/solver/nld_ms_sor_mat.h
index bbf8706a139..5ef00ae396c 100644
--- a/src/lib/netlist/solver/nld_ms_sor_mat.h
+++ b/src/lib/netlist/solver/nld_ms_sor_mat.h
@@ -35,11 +35,11 @@ public:
 
 	virtual ~matrix_solver_SOR_mat_t() {}
 
-	virtual void vsetup(analog_net_t::list_t &nets);
+	virtual void vsetup(analog_net_t::list_t &nets) override;
 
 	ATTR_HOT inline int vsolve_non_dynamic(const bool newton_raphson);
 protected:
-	ATTR_HOT virtual nl_double vsolve();
+	ATTR_HOT virtual nl_double vsolve() override;
 
 private:
 	nl_double m_Vdelta[_storage_N];
diff --git a/src/lib/netlist/solver/nld_solver.h b/src/lib/netlist/solver/nld_solver.h
index 040866c5736..2de12bb77f1 100644
--- a/src/lib/netlist/solver/nld_solver.h
+++ b/src/lib/netlist/solver/nld_solver.h
@@ -125,9 +125,9 @@ public:
 	}
 
 	/* netdevice functions */
-	ATTR_HOT  virtual void update();
-	virtual void start();
-	virtual void reset();
+	ATTR_HOT  virtual void update() override;
+	virtual void start() override;
+	virtual void reset() override;
 
 	ATTR_COLD int get_net_idx(net_t *net);
 
@@ -186,15 +186,15 @@ public:
 	virtual ~NETLIB_NAME(solver)();
 
 	ATTR_COLD void post_start();
-	ATTR_COLD void stop();
+	ATTR_COLD void stop() override;
 
 	ATTR_HOT inline nl_double gmin() { return m_gmin.Value(); }
 
 protected:
-	ATTR_HOT void update();
-	ATTR_HOT void start();
-	ATTR_HOT void reset();
-	ATTR_HOT void update_param();
+	ATTR_HOT void update() override;
+	ATTR_HOT void start() override;
+	ATTR_HOT void reset() override;
+	ATTR_HOT void update_param() override;
 
 	logic_input_t m_fb_step;
 	logic_output_t m_Q_step;
diff --git a/src/lib/netlist/tools/nl_convert.h b/src/lib/netlist/tools/nl_convert.h
index 7a410bb2f47..3b86c5ec1ad 100644
--- a/src/lib/netlist/tools/nl_convert.h
+++ b/src/lib/netlist/tools/nl_convert.h
@@ -144,7 +144,7 @@ public:
 	{
 	}
 
-	void convert(const pstring &contents);
+	void convert(const pstring &contents) override;
 
 protected:
 
@@ -197,7 +197,7 @@ public:
 
 	protected:
 
-		void verror(const pstring &msg, int line_num, const pstring &line)
+		void verror(const pstring &msg, int line_num, const pstring &line) override
 		{
 			m_convert.out("{} (line {}): {}\n", msg.cstr(), line_num, line.cstr());
 		}
@@ -207,7 +207,7 @@ public:
 		nl_convert_eagle_t &m_convert;
 	};
 
-	void convert(const pstring &contents);
+	void convert(const pstring &contents) override;
 
 protected: