diff --git a/src/emu/cpu/am29000/am29ops.h b/src/emu/cpu/am29000/am29ops.h
index 24ebfa0e539..9040379a901 100644
--- a/src/emu/cpu/am29000/am29ops.h
+++ b/src/emu/cpu/am29000/am29ops.h
@@ -1059,7 +1059,7 @@ static void LOADM(am29000_state *am29000)
 static void STORE(am29000_state *am29000)
 {
 	UINT32 addr = INST_M_BIT ? I8: GET_RB_VAL;
-	UINT32 r;
+//	UINT32 r;
 
 	if (INST_UA_BIT)
 		fatalerror("Am29000: UA bit set on LOAD\n");
@@ -1067,7 +1067,7 @@ static void STORE(am29000_state *am29000)
 	if (INST_CE_BIT)
 	{
 		logerror("Am29000: Attempting a co-processor LOAD!\n");
-		r = 0;
+//		r = 0;
 	}
 	else
 	{
diff --git a/src/emu/cpu/arm7/arm7.c b/src/emu/cpu/arm7/arm7.c
index 64010c86869..d647f04ddce 100644
--- a/src/emu/cpu/arm7/arm7.c
+++ b/src/emu/cpu/arm7/arm7.c
@@ -791,7 +791,7 @@ static READ32_DEVICE_HANDLER( arm7_rt_r_callback )
     UINT32 opcode = offset;
     UINT8 cReg = ( opcode & INSN_COPRO_CREG ) >> INSN_COPRO_CREG_SHIFT;
     UINT8 op2 =  ( opcode & INSN_COPRO_OP2 )  >> INSN_COPRO_OP2_SHIFT;
-    UINT8 op3 =    opcode & INSN_COPRO_OP3;
+//    UINT8 op3 =    opcode & INSN_COPRO_OP3;
     UINT8 cpnum = (opcode & INSN_COPRO_CPNUM) >> INSN_COPRO_CPNUM_SHIFT;
     UINT32 data = 0;
 
@@ -942,7 +942,7 @@ static READ32_DEVICE_HANDLER( arm7_rt_r_callback )
     }
 
     op2 = 0;
-    op3 = 0;
+//    op3 = 0;
 
     return data;
 }
diff --git a/src/emu/cpu/hd6309/6309ops.c b/src/emu/cpu/hd6309/6309ops.c
index e87bc4320e0..55c44179466 100644
--- a/src/emu/cpu/hd6309/6309ops.c
+++ b/src/emu/cpu/hd6309/6309ops.c
@@ -478,10 +478,10 @@ OP_HANDLER( bra )
 }
 
 /* $21 BRN relative ----- */
+static UINT8 brn_temp;	// hack around GCC 4.6 error because we need the side effects of IMMBYTE
 OP_HANDLER( brn )
 {
-	UINT8 t;
-	IMMBYTE(t);
+	IMMBYTE(brn_temp);
 }
 
 /* $1021 LBRN relative ----- */
diff --git a/src/emu/cpu/i386/i386ops.c b/src/emu/cpu/i386/i386ops.c
index 1a0b5dd9425..c851c8ca2eb 100644
--- a/src/emu/cpu/i386/i386ops.c
+++ b/src/emu/cpu/i386/i386ops.c
@@ -1018,7 +1018,7 @@ static void I386OP(repeat)(i386_state *cpustate, int invert_flag)
 	UINT32 repeated_eip = cpustate->eip;
 	UINT32 repeated_pc = cpustate->pc;
 	UINT8 opcode; // = FETCH(cpustate);
-	UINT32 eas, ead;
+//	UINT32 eas, ead;
 	UINT32 count;
 	INT32 cycle_base = 0, cycle_adjustment = 0;
 	UINT8 prefix_flag=1;
@@ -1068,11 +1068,12 @@ static void I386OP(repeat)(i386_state *cpustate, int invert_flag)
 
 	if( cpustate->segment_prefix ) {
 		// FIXME: the following does not work if both address override and segment override are used
-		eas = i386_translate(cpustate, cpustate->segment_override, cpustate->sreg[cpustate->segment_prefix].d ? REG32(ESI) : REG16(SI) );
+		i386_translate(cpustate, cpustate->segment_override, cpustate->sreg[cpustate->segment_prefix].d ? REG32(ESI) : REG16(SI) );
 	} else {
-		eas = i386_translate(cpustate, DS, cpustate->address_size ? REG32(ESI) : REG16(SI) );
+		//eas = 
+		i386_translate(cpustate, DS, cpustate->address_size ? REG32(ESI) : REG16(SI) );
 	}
-	ead = i386_translate(cpustate, ES, cpustate->address_size ? REG32(EDI) : REG16(DI) );
+	i386_translate(cpustate, ES, cpustate->address_size ? REG32(EDI) : REG16(DI) );
 
 	switch(opcode)
 	{
@@ -2218,13 +2219,13 @@ static void I386OP(into)(i386_state *cpustate)				// Opcode 0xce
 	}
 }
 
+static UINT32 i386_escape_ea;	// hack around GCC 4.6 error because we need the side effects of GetEA()
 static void I386OP(escape)(i386_state *cpustate)			// Opcodes 0xd8 - 0xdf
 {
 	UINT8 modrm = FETCH(cpustate);
 	if(modrm < 0xc0)
 	{
-		UINT32 ea;
-		ea = GetEA(cpustate,modrm);
+		i386_escape_ea = GetEA(cpustate,modrm);
 	}
 	CYCLES(cpustate,3);	// TODO: confirm this
 	(void) LOAD_RM8(modrm);
diff --git a/src/emu/cpu/i86/instr186.c b/src/emu/cpu/i86/instr186.c
index 1940c3eaa14..6dbf28902e2 100644
--- a/src/emu/cpu/i86/instr186.c
+++ b/src/emu/cpu/i86/instr186.c
@@ -27,15 +27,15 @@ static void PREFIX186(_pusha)(i8086_state *cpustate)    /* Opcode 0x60 */
 	PUSH(cpustate->regs.w[DI]);
 }
 
+static unsigned i186_popa_tmp;  // hack around GCC 4.6 error because we need the side effects of POP
 static void PREFIX186(_popa)(i8086_state *cpustate)    /* Opcode 0x61 */
 {
-	 unsigned tmp;
 
 	ICOUNT -= timing.popa;
 	POP(cpustate->regs.w[DI]);
 	POP(cpustate->regs.w[SI]);
 	POP(cpustate->regs.w[BP]);
-	POP(tmp);
+	POP(i186_popa_tmp);
 	POP(cpustate->regs.w[BX]);
 	POP(cpustate->regs.w[DX]);
 	POP(cpustate->regs.w[CX]);
diff --git a/src/emu/cpu/i86/instr86.c b/src/emu/cpu/i86/instr86.c
index e7086dd5e78..17896a6706d 100644
--- a/src/emu/cpu/i86/instr86.c
+++ b/src/emu/cpu/i86/instr86.c
@@ -1177,8 +1177,8 @@ static void PREFIX86(_cmp_axd16)(i8086_state *cpustate)    /* Opcode 0x3d */
 
 static void PREFIX86(_aas)(i8086_state *cpustate)    /* Opcode 0x3f */
 {
-	UINT8 ALcarry=1;
-	if (cpustate->regs.b[AL]>0xf9) ALcarry=2;
+//	UINT8 ALcarry=1;
+//	if (cpustate->regs.b[AL]>0xf9) ALcarry=2;
 
 	if (AF || ((cpustate->regs.b[AL] & 0xf) > 9))
     {
diff --git a/src/emu/cpu/konami/konamops.c b/src/emu/cpu/konami/konamops.c
index 747504166df..e04c2483311 100644
--- a/src/emu/cpu/konami/konamops.c
+++ b/src/emu/cpu/konami/konamops.c
@@ -300,10 +300,10 @@ INLINE void bra( konami_state *cpustate )
 }
 
 /* $21 BRN relative ----- */
+static UINT8 konami_brn_t;	// hack around GCC 4.6 error because we need the side effects of IMMBYTE 
 INLINE void brn( konami_state *cpustate )
 {
-	UINT8 t;
-	IMMBYTE(cpustate, t);
+	IMMBYTE(cpustate, konami_brn_t);
 }
 
 /* $1021 LBRN relative ----- */
diff --git a/src/osd/sdl/debugwin.c b/src/osd/sdl/debugwin.c
index c30a0dbbe58..ae0634ababa 100644
--- a/src/osd/sdl/debugwin.c
+++ b/src/osd/sdl/debugwin.c
@@ -764,7 +764,7 @@ static void memorywin_destroy(GtkObject *obj, gpointer user_data)
 static void memorywin_new(running_machine &machine)
 {
 	win_i *mem;
-	int item, cursel;
+	int item; //, cursel;
 	device_t *curcpu = debug_cpu_get_visible_cpu(machine);
 	GtkComboBox *		zone_w;
 
@@ -781,7 +781,8 @@ static void memorywin_new(running_machine &machine)
 	downcast<debug_view_memory *>(mem->views[0]->view)->set_expression("0");
 
 	// populate the combobox
-	cursel = item = 0;
+//	cursel = 0;
+	item = 0;
 
 	for (const debug_view_source *source = mem->views[0]->view->source_list().head(); source != NULL; source = source->next())
 	{
@@ -858,7 +859,7 @@ static void disasmwin_destroy(GtkObject *obj, gpointer user_data)
 static void disasmwin_new(running_machine &machine)
 {
 	win_i *dis;
-	int item, cursel;
+	int item; //, cursel;
 	device_t *curcpu = debug_cpu_get_visible_cpu(machine);
 	GtkComboBox 		*cpu_w;
 	astring title;
@@ -877,7 +878,8 @@ static void disasmwin_new(running_machine &machine)
 	downcast<debug_view_disasm *>(dis->views[0]->view)->set_expression("curpc");
 
 	// populate the combobox
-	cursel = item = 0;
+//	cursel = 0;
+	item = 0;
 	for (const debug_view_source *source = dis->views[0]->view->source_list().head(); source != NULL; source = source->next())
 	{
 		gtk_combo_box_append_text(cpu_w, source->name());