diff --git a/src/emu/sound/ymf271.c b/src/emu/sound/ymf271.c
index 249dc42105c..f9727703f54 100644
--- a/src/emu/sound/ymf271.c
+++ b/src/emu/sound/ymf271.c
@@ -524,7 +524,7 @@ static void update_pcm(YMF271Chip *chip, int slotnum, INT32 *mixp, int length)
 	int i;
 	int final_volume;
 	INT16 sample;
-	INT64 ch0_vol, ch1_vol, ch2_vol, ch3_vol;
+	INT64 ch0_vol, ch1_vol; //, ch2_vol, ch3_vol;
 	const UINT8 *rombase;
 
 	YMF271Slot *slot = &chip->slots[slotnum];
@@ -561,8 +561,8 @@ static void update_pcm(YMF271Chip *chip, int slotnum, INT32 *mixp, int length)
 
 		ch0_vol = ((UINT64)final_volume * (UINT64)channel_attenuation[slot->ch0_level]) >> 16;
 		ch1_vol = ((UINT64)final_volume * (UINT64)channel_attenuation[slot->ch1_level]) >> 16;
-		ch2_vol = ((UINT64)final_volume * (UINT64)channel_attenuation[slot->ch2_level]) >> 16;
-		ch3_vol = ((UINT64)final_volume * (UINT64)channel_attenuation[slot->ch3_level]) >> 16;
+//		ch2_vol = ((UINT64)final_volume * (UINT64)channel_attenuation[slot->ch2_level]) >> 16;
+//		ch3_vol = ((UINT64)final_volume * (UINT64)channel_attenuation[slot->ch3_level]) >> 16;
 
 		if (ch0_vol > 65536) ch0_vol = 65536;
 		if (ch1_vol > 65536) ch1_vol = 65536;
diff --git a/src/lib/formats/wavfile.c b/src/lib/formats/wavfile.c
index aa8d17e8a74..d9668d48723 100644
--- a/src/lib/formats/wavfile.c
+++ b/src/lib/formats/wavfile.c
@@ -70,7 +70,7 @@ static casserr_t wavfile_process(cassette_image *cassette, struct CassetteOption
 
 	UINT16 format_type = 0;
 	UINT32 bytes_per_second = 0;
-	UINT16 block_align = 0;
+//	UINT16 block_align = 0;
 	int waveform_flags = 0;
 
 	/* read header */
@@ -108,7 +108,7 @@ static casserr_t wavfile_process(cassette_image *cassette, struct CassetteOption
 			opts->channels			= get_leuint16(&format_tag[2]);
 			opts->sample_frequency	= get_leuint32(&format_tag[4]);
 			bytes_per_second		= get_leuint32(&format_tag[8]);
-			block_align				= get_leuint16(&format_tag[12]);
+//			block_align				= get_leuint16(&format_tag[12]);
 			opts->bits_per_sample	= get_leuint16(&format_tag[14]);
 
 			if (format_type != WAV_FORMAT_PCM)
diff --git a/src/lib/softfloat/softfloat.c b/src/lib/softfloat/softfloat.c
index 2c0a724e624..2bd5a73def6 100644
--- a/src/lib/softfloat/softfloat.c
+++ b/src/lib/softfloat/softfloat.c
@@ -1866,7 +1866,7 @@ float32 float32_div( float32 a, float32 b )
 
 float32 float32_rem( float32 a, float32 b )
 {
-    flag aSign, bSign, zSign;
+    flag aSign, zSign;
     int16 aExp, bExp, expDiff;
     bits32 aSig, bSig;
     bits32 q;
@@ -1879,7 +1879,7 @@ float32 float32_rem( float32 a, float32 b )
     aSign = extractFloat32Sign( a );
     bSig = extractFloat32Frac( b );
     bExp = extractFloat32Exp( b );
-    bSign = extractFloat32Sign( b );
+//    bSign = extractFloat32Sign( b );
     if ( aExp == 0xFF ) {
         if ( aSig || ( ( bExp == 0xFF ) && bSig ) ) {
             return propagateFloat32NaN( a, b );
@@ -2803,7 +2803,7 @@ float64 float64_div( float64 a, float64 b )
 
 float64 float64_rem( float64 a, float64 b )
 {
-    flag aSign, bSign, zSign;
+    flag aSign, zSign;
     int16 aExp, bExp, expDiff;
     bits64 aSig, bSig;
     bits64 q, alternateASig;
@@ -2814,7 +2814,7 @@ float64 float64_rem( float64 a, float64 b )
     aSign = extractFloat64Sign( a );
     bSig = extractFloat64Frac( b );
     bExp = extractFloat64Exp( b );
-    bSign = extractFloat64Sign( b );
+//    bSign = extractFloat64Sign( b );
     if ( aExp == 0x7FF ) {
         if ( aSig || ( ( bExp == 0x7FF ) && bSig ) ) {
             return propagateFloat64NaN( a, b );
@@ -3711,7 +3711,7 @@ floatx80 floatx80_div( floatx80 a, floatx80 b )
 
 floatx80 floatx80_rem( floatx80 a, floatx80 b )
 {
-    flag aSign, bSign, zSign;
+    flag aSign, zSign;
     int32 aExp, bExp, expDiff;
     bits64 aSig0, aSig1, bSig;
     bits64 q, term0, term1, alternateASig0, alternateASig1;
@@ -3722,7 +3722,7 @@ floatx80 floatx80_rem( floatx80 a, floatx80 b )
     aSign = extractFloatx80Sign( a );
     bSig = extractFloatx80Frac( b );
     bExp = extractFloatx80Exp( b );
-    bSign = extractFloatx80Sign( b );
+//    bSign = extractFloatx80Sign( b );
     if ( aExp == 0x7FFF ) {
         if (    (bits64) ( aSig0<<1 )
              || ( ( bExp == 0x7FFF ) && (bits64) ( bSig<<1 ) ) ) {
@@ -4820,7 +4820,7 @@ float128 float128_div( float128 a, float128 b )
 
 float128 float128_rem( float128 a, float128 b )
 {
-    flag aSign, bSign, zSign;
+    flag aSign, zSign;
     int32 aExp, bExp, expDiff;
     bits64 aSig0, aSig1, bSig0, bSig1, q, term0, term1, term2;
     bits64 allZero, alternateASig0, alternateASig1, sigMean1;
@@ -4834,7 +4834,7 @@ float128 float128_rem( float128 a, float128 b )
     bSig1 = extractFloat128Frac1( b );
     bSig0 = extractFloat128Frac0( b );
     bExp = extractFloat128Exp( b );
-    bSign = extractFloat128Sign( b );
+//    bSign = extractFloat128Sign( b );
     if ( aExp == 0x7FFF ) {
         if (    ( aSig0 | aSig1 )
              || ( ( bExp == 0x7FFF ) && ( bSig0 | bSig1 ) ) ) {