diff --git a/sc2/src/sc2code/libs/mikmod/load_mod.c b/sc2/src/sc2code/libs/mikmod/load_mod.c
index e8d003a21..40d4b9acf 100644
--- a/sc2/src/sc2code/libs/mikmod/load_mod.c
+++ b/sc2/src/sc2code/libs/mikmod/load_mod.c
@@ -323,7 +323,7 @@ static BOOL ML_LoadPatterns(void)
 	if (trekker && of.numchn == 8) {
 		/* Startrekker module dual pattern */
 		for (t = 0; t < of.numpat; t++) {
-			for (s = 0; s < (64U * 4); s++) {
+			for (s = 0; s < (64 * 4); s++) {
 				patbuf[s].a = _mm_read_UBYTE(modreader);
 				patbuf[s].b = _mm_read_UBYTE(modreader);
 				patbuf[s].c = _mm_read_UBYTE(modreader);
@@ -332,7 +332,7 @@ static BOOL ML_LoadPatterns(void)
 			for (s = 0; s < 4; s++)
 				if (!(of.tracks[tracks++] = ConvertTrack(patbuf + s, 4)))
 					return 0;
-			for (s = 0; s < (64U * 4); s++) {
+			for (s = 0; s < (64 * 4); s++) {
 				patbuf[s].a = _mm_read_UBYTE(modreader);
 				patbuf[s].b = _mm_read_UBYTE(modreader);
 				patbuf[s].c = _mm_read_UBYTE(modreader);
@@ -346,7 +346,7 @@ static BOOL ML_LoadPatterns(void)
 		/* Generic module pattern */
 		for (t = 0; t < of.numpat; t++) {
 			/* Load the pattern into the temp buffer and convert it */
-			for (s = 0; s < (64U * of.numchn); s++) {
+			for (s = 0; s < (64 * of.numchn); s++) {
 				patbuf[s].a = _mm_read_UBYTE(modreader);
 				patbuf[s].b = _mm_read_UBYTE(modreader);
 				patbuf[s].c = _mm_read_UBYTE(modreader);
diff --git a/sc2/src/sc2code/libs/mikmod/load_stm.c b/sc2/src/sc2code/libs/mikmod/load_stm.c
index dd49c6351..299f33bf3 100644
--- a/sc2/src/sc2code/libs/mikmod/load_stm.c
+++ b/sc2/src/sc2code/libs/mikmod/load_stm.c
@@ -231,7 +231,7 @@ static BOOL STM_LoadPatterns(void)
 
 	/* Allocate temporary buffer for loading and converting the patterns */
 	for(t=0;t<of.numpat;t++) {
-		for(s=0;s<(64U*of.numchn);s++) {
+		for(s=0;s<(64*of.numchn);s++) {
 			stmbuf[s].note   = _mm_read_UBYTE(modreader);
 			stmbuf[s].insvol = _mm_read_UBYTE(modreader);
 			stmbuf[s].volcmd = _mm_read_UBYTE(modreader);
@@ -255,6 +255,8 @@ BOOL STM_Load(BOOL curious)
 	ULONG MikMod_ISA; /* We must generate our own ISA, it's not stored in stm */
 	SAMPLE *q;
 
+	(void)curious; /* unused arg */
+
 	/* try to read stm header */
 	_mm_read_string(mh->songname,20,modreader);
 	_mm_read_string(mh->trackername,8,modreader);
diff --git a/sc2/src/sc2code/libs/mikmod/load_xm.c b/sc2/src/sc2code/libs/mikmod/load_xm.c
index cdc781d19..97e0b738b 100644
--- a/sc2/src/sc2code/libs/mikmod/load_xm.c
+++ b/sc2/src/sc2code/libs/mikmod/load_xm.c
@@ -651,6 +651,8 @@ BOOL XM_Load(BOOL curious)
 	BOOL dummypat=0;
 	char tracker[21],modtype[60];
 
+	(void)curious; /* unused arg */
+
 	/* try to read module header */
 	_mm_read_string(mh->id,17,modreader);
 	_mm_read_string(mh->songname,21,modreader);
diff --git a/sc2/src/sc2code/libs/mikmod/mlutil.c b/sc2/src/sc2code/libs/mikmod/mlutil.c
index ec10f5e34..2ecf64eff 100644
--- a/sc2/src/sc2code/libs/mikmod/mlutil.c
+++ b/sc2/src/sc2code/libs/mikmod/mlutil.c
@@ -93,7 +93,8 @@ void FreeLinear(void)
 
 int speed_to_finetune(ULONG speed,int sample)
 {
-    int ctmp=0,tmp,note=1,finetune=0;
+    int note=1,finetune=0;
+	ULONG ctmp=0,tmp;
 
     speed>>=1;
     while((tmp=getfrequency(of.flags,getlinearperiod(note<<1,0)))<speed) {
diff --git a/sc2/src/sc2code/libs/mikmod/mmio.c b/sc2/src/sc2code/libs/mikmod/mmio.c
index 6488f2479..0f8a07970 100644
--- a/sc2/src/sc2code/libs/mikmod/mmio.c
+++ b/sc2/src/sc2code/libs/mikmod/mmio.c
@@ -265,7 +265,7 @@ static BOOL _mm_MemReader_Read(MREADER* reader,void* ptr,size_t size)
 	s = ((MMEMREADER*)reader)->buffer;
 	s += ((MMEMREADER*)reader)->pos;
 
-	if ( ((MMEMREADER*)reader)->pos + size > ((MMEMREADER*)reader)->len) 
+	if ( ((MMEMREADER*)reader)->pos + (long)size > ((MMEMREADER*)reader)->len) 
 	{
 		((MMEMREADER*)reader)->pos = ((MMEMREADER*)reader)->len;
 		return 0; /* not enough remaining bytes */
diff --git a/sc2/src/sc2code/libs/mikmod/mplayer.c b/sc2/src/sc2code/libs/mikmod/mplayer.c
index 3aea13fcb..812410a15 100644
--- a/sc2/src/sc2code/libs/mikmod/mplayer.c
+++ b/sc2/src/sc2code/libs/mikmod/mplayer.c
@@ -549,6 +549,9 @@ static int DoPTEffect0(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWOR
 {
 	UBYTE dat;
 
+	(void)mod; /* unused arg */
+	(void)channel; /* unused arg */
+
 	dat = UniGetByte();
 	if (!tick) {
 		if (!dat && (flags & UF_ARPMEM))
@@ -566,6 +569,10 @@ static int DoPTEffect1(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWOR
 {
 	UBYTE dat;
 
+	(void)flags; /* unused arg */
+	(void)mod; /* unused arg */
+	(void)channel; /* unused arg */
+
 	dat = UniGetByte();
 	if (!tick && dat)
 		a->slidespeed = (UWORD)dat << 2;
@@ -580,6 +587,10 @@ static int DoPTEffect2(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWOR
 {
 	UBYTE dat;
 
+	(void)flags; /* unused arg */
+	(void)mod; /* unused arg */
+	(void)channel; /* unused arg */
+
 	dat = UniGetByte();
 	if (!tick && dat)
 		a->slidespeed = (UWORD)dat << 2;
@@ -624,6 +635,10 @@ static int DoPTEffect3(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWOR
 {
 	UBYTE dat;
 
+	(void)flags; /* unused arg */
+	(void)mod; /* unused arg */
+	(void)channel; /* unused arg */
+
 	dat=UniGetByte();
 	if ((!tick)&&(dat)) a->portspeed=(UWORD)dat<<2;
 	if (a->main.period)
@@ -676,6 +691,10 @@ static int DoPTEffect4(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWOR
 {
 	UBYTE dat;
 
+	(void)flags; /* unused arg */
+	(void)mod; /* unused arg */
+	(void)channel; /* unused arg */
+	
 	dat=UniGetByte();
 	if (!tick) {
 		if (dat&0x0f) a->vibdepth=dat&0xf;
@@ -704,6 +723,10 @@ static int DoPTEffect5(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWOR
 {
 	UBYTE dat;
 
+	(void)flags; /* unused arg */
+	(void)mod; /* unused arg */
+	(void)channel; /* unused arg */
+
 	dat=UniGetByte();
 	if (a->main.period)
 		DoToneSlide(tick, a);
@@ -722,6 +745,10 @@ static int DoPTEffect7(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWOR
 	UBYTE q;
 	UWORD temp = 0;	/* silence warning */
 
+	(void)flags; /* unused arg */
+	(void)mod; /* unused arg */
+	(void)channel; /* unused arg */
+
 	dat=UniGetByte();
 	if (!tick) {
 		if (dat&0x0f) a->trmdepth=dat&0xf;
@@ -769,6 +796,9 @@ static int DoPTEffect8(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWOR
 {
 	UBYTE dat;
 
+	(void)tick; /* unused arg */
+	(void)flags; /* unused arg */
+
 	dat = UniGetByte();
 	if (mod->panflag)
 		a->main.panning = mod->panning[channel] = dat;
@@ -780,6 +810,10 @@ static int DoPTEffect9(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWOR
 {
 	UBYTE dat;
 
+	(void)flags; /* unused arg */
+	(void)mod; /* unused arg */
+	(void)channel; /* unused arg */
+
 	dat=UniGetByte();
 	if (!tick) {
 		if (dat) a->soffset=(UWORD)dat<<8;
@@ -797,6 +831,10 @@ static int DoPTEffectA(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWOR
 {
 	UBYTE dat;
 
+	(void)flags; /* unused arg */
+	(void)mod; /* unused arg */
+	(void)channel; /* unused arg */
+
 	dat=UniGetByte();
 	if (tick)
 		DoVolSlide(a, dat);
@@ -817,6 +855,9 @@ static int DoPTEffectB(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWOR
 {
 	UBYTE dat;
 
+	(void)a; /* unused arg */
+	(void)channel; /* unused arg */
+
 	dat=UniGetByte();
 
 	if (tick || mod->patdly2)
@@ -851,6 +892,10 @@ static int DoPTEffectC(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWOR
 {
 	UBYTE dat;
 
+	(void)flags; /* unused arg */
+	(void)mod; /* unused arg */
+	(void)channel; /* unused arg */
+
 			dat=UniGetByte();
 			if (tick) return 0;
 			if (dat==(UBYTE)-1) a->anote=dat=0; /* note cut */
@@ -864,6 +909,9 @@ static int DoPTEffectD(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWOR
 {
 	UBYTE dat;
 
+	(void)a; /* unused arg */
+	(void)channel; /* unused arg */
+
 			dat=UniGetByte();
 			if ((tick)||(mod->patdly2)) return 0;
 			if ((mod->positions[mod->sngpos]!=LAST_PATTERN)&&
@@ -1025,6 +1073,10 @@ static int DoPTEffectF(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWOR
 {
 	UBYTE dat;
 
+	(void)flags; /* unused arg */
+	(void)a; /* unused arg */
+	(void)channel; /* unused arg */
+
 	dat=UniGetByte();
 	if (tick||mod->patdly2) return 0;
 	if (mod->extspd&&(dat>=mod->bpmlimit))
@@ -1044,6 +1096,10 @@ static int DoS3MEffectA(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWO
 {
 	UBYTE speed;
 
+	(void)flags; /* unused arg */
+	(void)a; /* unused arg */
+	(void)channel; /* unused arg */
+
 	speed = UniGetByte();
 
 	if (tick || mod->patdly2)
@@ -1093,6 +1149,9 @@ static void DoS3MVolSlide(UWORD tick, UWORD flags, MP_CONTROL *a, UBYTE inf)
 
 static int DoS3MEffectD(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWORD channel)
 {
+	(void)mod; /* unused arg */
+	(void)channel; /* unused arg */
+	
 	DoS3MVolSlide(tick, flags, a, UniGetByte());
 
 	return 1;
@@ -1124,6 +1183,10 @@ static int DoS3MEffectE(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWO
 {
 	UBYTE dat;
 
+	(void)flags; /* unused arg */
+	(void)mod; /* unused arg */
+	(void)channel; /* unused arg */
+
 	dat=UniGetByte();
 	if (a->main.period)
 		DoS3MSlideDn(tick, a,dat);
@@ -1155,6 +1218,10 @@ static int DoS3MEffectF(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWO
 {
 	UBYTE dat;
 
+	(void)flags; /* unused arg */
+	(void)mod; /* unused arg */
+	(void)channel; /* unused arg */
+
 	dat=UniGetByte();
 	if (a->main.period)
 		DoS3MSlideUp(tick, a,dat);
@@ -1166,6 +1233,10 @@ static int DoS3MEffectI(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWO
 {
 	UBYTE inf, on, off;
 
+	(void)flags; /* unused arg */
+	(void)mod; /* unused arg */
+	(void)channel; /* unused arg */
+
 	inf = UniGetByte();
 	if (inf)
 		a->s3mtronof = inf;
@@ -1192,6 +1263,9 @@ static int DoS3MEffectQ(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWO
 {
 	UBYTE inf;
 
+	(void)mod; /* unused arg */
+	(void)channel; /* unused arg */
+
 	inf = UniGetByte();
 	if (a->main.period) {
 		if (inf) {
@@ -1254,6 +1328,10 @@ static int DoS3MEffectR(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWO
 	UBYTE dat, q;
 	UWORD temp=0;	/* silence warning */
 
+	(void)flags; /* unused arg */
+	(void)mod; /* unused arg */
+	(void)channel; /* unused arg */
+
 	dat = UniGetByte();
 	if (!tick) {
 		if (dat&0x0f) a->trmdepth=dat&0xf;
@@ -1301,6 +1379,10 @@ static int DoS3MEffectT(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWO
 {
 	UBYTE tempo;
 
+	(void)flags; /* unused arg */
+	(void)a; /* unused arg */
+	(void)channel; /* unused arg */
+
 	tempo = UniGetByte();
 
 	if (tick || mod->patdly2)
@@ -1316,6 +1398,10 @@ static int DoS3MEffectU(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWO
 	UBYTE dat, q;
 	UWORD temp = 0;	/* silence warning */
 
+	(void)flags; /* unused arg */
+	(void)mod; /* unused arg */
+	(void)channel; /* unused arg */
+
 	dat = UniGetByte();
 	if (!tick) {
 		if (dat&0x0f) a->vibdepth=dat&0xf;
@@ -1360,6 +1446,11 @@ static int DoS3MEffectU(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWO
 
 static int DoKeyOff(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWORD channel)
 {
+	(void)tick; /* unused arg */
+	(void)flags; /* unused arg */
+	(void)mod; /* unused arg */
+	(void)channel; /* unused arg */
+
 	a->main.keyoff|=KEY_OFF;
 	if ((!(a->main.volflg&EF_ON))||(a->main.volflg&EF_LOOP))
 		a->main.keyoff=KEY_KILL;
@@ -1371,6 +1462,9 @@ static int DoKeyFade(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWORD
 {
 	UBYTE dat;
 
+	(void)flags; /* unused arg */
+	(void)channel; /* unused arg */
+
 	dat=UniGetByte();
 	if ((tick>=dat)||(tick==mod->sngspd-1)) {
 		a->main.keyoff=KEY_KILL;
@@ -1389,6 +1483,10 @@ static int DoXMEffectA(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWOR
 {
 	UBYTE inf, lo, hi;
 
+	(void)flags; /* unused arg */
+	(void)mod; /* unused arg */
+	(void)channel; /* unused arg */
+
 	inf = UniGetByte();
 	if (inf)
 		a->s3mvolslide = inf;
@@ -1423,6 +1521,10 @@ static int DoXMEffectE1(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWO
 {
 	UBYTE dat;
 
+	(void)flags; /* unused arg */
+	(void)mod; /* unused arg */
+	(void)channel; /* unused arg */
+
 	dat=UniGetByte();
 	if (!tick) {
 		if (dat) a->fportupspd=dat;
@@ -1437,6 +1539,10 @@ static int DoXMEffectE2(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWO
 {
 	UBYTE dat;
 
+	(void)flags; /* unused arg */
+	(void)mod; /* unused arg */
+	(void)channel; /* unused arg */
+
 	dat=UniGetByte();
 	if (!tick) {
 		if (dat) a->fportdnspd=dat;
@@ -1451,6 +1557,10 @@ static int DoXMEffectEA(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWO
 {
 	UBYTE dat;
 
+	(void)flags; /* unused arg */
+	(void)mod; /* unused arg */
+	(void)channel; /* unused arg */
+
 	dat=UniGetByte();
 	if (!tick)
 		if (dat) a->fslideupspd=dat;
@@ -1464,6 +1574,10 @@ static int DoXMEffectEB(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWO
 {
 	UBYTE dat;
 
+	(void)flags; /* unused arg */
+	(void)mod; /* unused arg */
+	(void)channel; /* unused arg */
+
 	dat=UniGetByte();
 	if (!tick)
 		if (dat) a->fslidednspd=dat;
@@ -1475,6 +1589,11 @@ static int DoXMEffectEB(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWO
 
 static int DoXMEffectG(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWORD channel)
 {
+	(void)tick; /* unused arg */
+	(void)flags; /* unused arg */
+	(void)a; /* unused arg */
+	(void)channel; /* unused arg */
+
 	mod->volume=UniGetByte()<<1;
 	if (mod->volume>128) mod->volume=128;
 
@@ -1485,6 +1604,10 @@ static int DoXMEffectH(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWOR
 {
 	UBYTE inf;
 
+	(void)flags; /* unused arg */
+	(void)a; /* unused arg */
+	(void)channel; /* unused arg */
+
 	inf = UniGetByte();
 
 	if (tick) {
@@ -1506,6 +1629,10 @@ static int DoXMEffectL(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWOR
 {
 	UBYTE dat;
 
+	(void)flags; /* unused arg */
+	(void)mod; /* unused arg */
+	(void)channel; /* unused arg */
+
 	dat=UniGetByte();
 	if ((!tick)&&(a->main.i)) {
 		UWORD points;
@@ -1532,6 +1659,9 @@ static int DoXMEffectP(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWOR
 	UBYTE inf, lo, hi;
 	SWORD pan;
 
+	(void)flags; /* unused arg */
+	(void)channel; /* unused arg */
+
 	inf = UniGetByte();
 	if (!mod->panflag)
 		return 0;
@@ -1560,6 +1690,10 @@ static int DoXMEffectX1(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWO
 {
 	UBYTE dat;
 
+	(void)flags; /* unused arg */
+	(void)mod; /* unused arg */
+	(void)channel; /* unused arg */
+
 	dat = UniGetByte();
 	if (dat)
 		a->ffportupspd = dat;
@@ -1580,6 +1714,10 @@ static int DoXMEffectX2(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWO
 {
 	UBYTE dat;
 
+	(void)flags; /* unused arg */
+	(void)mod; /* unused arg */
+	(void)channel; /* unused arg */
+
 	dat = UniGetByte();
 	if (dat)
 		a->ffportdnspd=dat;
@@ -1640,6 +1778,10 @@ static void DoITToneSlide(UWORD tick, MP_CONTROL *a, UBYTE dat)
 
 static int DoITEffectG(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWORD channel)
 {
+	(void)flags; /* unused arg */
+	(void)mod; /* unused arg */
+	(void)channel; /* unused arg */
+
 	DoITToneSlide(tick, a, UniGetByte());
 
 	return 0;
@@ -1691,6 +1833,10 @@ static void DoITVibrato(UWORD tick, MP_CONTROL *a, UBYTE dat)
 
 static int DoITEffectH(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWORD channel)
 {
+	(void)flags; /* unused arg */
+	(void)mod; /* unused arg */
+	(void)channel; /* unused arg */
+
 	DoITVibrato(tick, a, UniGetByte());
 
 	return 0;
@@ -1700,6 +1846,11 @@ static int DoITEffectI(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWOR
 {
 	UBYTE inf, on, off;
 
+	(void)tick; /* unused arg */
+	(void)flags; /* unused arg */
+	(void)mod; /* unused arg */
+	(void)channel; /* unused arg */
+
 	inf = UniGetByte();
 	if (inf)
 		a->s3mtronof = inf;
@@ -1722,6 +1873,11 @@ static int DoITEffectI(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWOR
 
 static int DoITEffectM(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWORD channel)
 {
+	(void)tick; /* unused arg */
+	(void)flags; /* unused arg */
+	(void)mod; /* unused arg */
+	(void)channel; /* unused arg */
+
 	a->main.chanvol=UniGetByte();
 	if (a->main.chanvol>64)
 		a->main.chanvol=64;
@@ -1735,6 +1891,10 @@ static int DoITEffectN(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWOR
 {
 	UBYTE inf, lo, hi;
 
+	(void)flags; /* unused arg */
+	(void)mod; /* unused arg */
+	(void)channel; /* unused arg */
+
 	inf = UniGetByte();
 
 	if (inf)
@@ -1771,6 +1931,9 @@ static int DoITEffectP(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWOR
 	UBYTE inf, lo, hi;
 	SWORD pan;
 
+	(void)flags; /* unused arg */
+	(void)channel; /* unused arg */
+
 	inf = UniGetByte();
 	if (inf)
 		a->pansspd = inf;
@@ -1808,6 +1971,11 @@ static int DoITEffectT(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWOR
 	UBYTE tempo;
 	SWORD temp;
 
+	(void)tick; /* unused arg */
+	(void)flags; /* unused arg */
+	(void)a; /* unused arg */
+	(void)channel; /* unused arg */
+
    	tempo = UniGetByte();
 
 	if (mod->patdly2)
@@ -1829,6 +1997,10 @@ static int DoITEffectU(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWOR
 	UBYTE dat, q;
 	UWORD temp = 0;	/* silence warning */
 
+	(void)flags; /* unused arg */
+	(void)mod; /* unused arg */
+	(void)channel; /* unused arg */
+
 	dat = UniGetByte();
 	if (!tick) {
 		if (dat&0x0f) a->vibdepth=dat&0xf;
@@ -1873,6 +2045,10 @@ static int DoITEffectW(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWOR
 {
 	UBYTE inf, lo, hi;
 
+	(void)flags; /* unused arg */
+	(void)a; /* unused arg */
+	(void)channel; /* unused arg */
+
 	inf = UniGetByte();
 
 	if (inf)
@@ -1909,6 +2085,7 @@ static int DoITEffectY(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWOR
 	UBYTE dat, q;
 	SLONG temp = 0;	/* silence warning */
 
+	(void)flags; /* unused arg */
 
 	dat=UniGetByte();
 	if (!tick) {
@@ -2032,6 +2209,8 @@ static int DoITEffectS0(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWO
 static int DoVolEffects(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWORD channel)
 {
 	UBYTE c, inf;
+
+	(void)channel; /* unused arg */
 	
 	c = UniGetByte(); 
 	inf = UniGetByte(); 
@@ -2083,6 +2262,11 @@ static int DoULTEffect9(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWO
 {
 	UWORD offset=UniGetWord();
 
+	(void)tick; /* unused arg */
+	(void)flags; /* unused arg */
+	(void)mod; /* unused arg */
+	(void)channel; /* unused arg */
+
 	if (offset)
 		a->ultoffset=offset;
 
@@ -2100,6 +2284,11 @@ static int DoMEDSpeed(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWORD
 {
 	UWORD speed=UniGetWord();
 
+	(void)tick; /* unused arg */
+	(void)flags; /* unused arg */
+	(void)a; /* unused arg */
+	(void)channel; /* unused arg */
+
 	mod->bpm=speed;
 
 	return 0;
@@ -2132,6 +2321,9 @@ static int DoOktArp(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWORD c
 {
 	UBYTE dat, dat2;
 
+	(void)mod; /* unused arg */
+	(void)channel; /* unused arg */
+
 	dat2 = UniGetByte();	/* arpeggio style */
 	dat = UniGetByte();
 	if (!tick) {
@@ -2150,6 +2342,12 @@ static int DoOktArp(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWORD c
 
 static int DoNothing(UWORD tick, UWORD flags, MP_CONTROL *a, MODULE *mod, SWORD channel)
 {
+	(void)tick; /* unused arg */
+	(void)flags; /* unused arg */
+	(void)a; /* unused arg */
+	(void)mod; /* unused arg */
+	(void)channel; /* unused arg */
+
 	UniSkipOpcode();
 
 	return 0;
@@ -3241,7 +3439,7 @@ MIKMODAPI void Player_Mute(SLONG arg1,...)
 static void Player_ToggleMute_internal(SLONG arg1,va_list ap)
 {
 	SLONG arg2,arg3=0;
-	ULONG t;
+	SLONG t;
 
 	if (pf) {
 		switch (arg1) {
diff --git a/sc2/src/sc2code/libs/mikmod/virtch.c b/sc2/src/sc2code/libs/mikmod/virtch.c
index ab9f67820..0bbb470c1 100644
--- a/sc2/src/sc2code/libs/mikmod/virtch.c
+++ b/sc2/src/sc2code/libs/mikmod/virtch.c
@@ -775,7 +775,7 @@ void VC1_WriteSamples(SBYTE* buf,ULONG todo)
 			if(vc_mode & DMODE_SOFT_MUSIC) md_player();
 			tickleft=(md_mixfreq*125L)/(md_bpm*50L);
 		}
-		left = MIN(tickleft, todo);
+		left = MIN(tickleft, (long)todo);
 		buffer    = buf;
 		tickleft -= left;
 		todo     -= left;
diff --git a/sc2/src/sc2code/libs/mikmod/virtch2.c b/sc2/src/sc2code/libs/mikmod/virtch2.c
index bcf247621..231f1a680 100644
--- a/sc2/src/sc2code/libs/mikmod/virtch2.c
+++ b/sc2/src/sc2code/libs/mikmod/virtch2.c
@@ -710,7 +710,7 @@ void VC2_WriteSamples(SBYTE* buf,ULONG todo)
 			tickleft=(md_mixfreq*125L*SAMPLING_FACTOR)/(md_bpm*50L);
 			tickleft&=~(SAMPLING_FACTOR-1);
 		}
-		left = MIN(tickleft, todo);
+		left = MIN(tickleft, (long)todo);
 		buffer    = buf;
 		tickleft -= left;
 		todo     -= left;
diff --git a/sc2/src/sc2code/libs/mikmod/virtch_common.c b/sc2/src/sc2code/libs/mikmod/virtch_common.c
index e557f884b..b0b81ee08 100644
--- a/sc2/src/sc2code/libs/mikmod/virtch_common.c
+++ b/sc2/src/sc2code/libs/mikmod/virtch_common.c
@@ -410,11 +410,15 @@ SWORD VC1_SampleLoad(struct SAMPLOAD* sload,int type)
 
 ULONG VC1_SampleSpace(int type)
 {
+	(void)type; /* unused arg */
+
 	return vc_memory;
 }
 
 ULONG VC1_SampleLength(int type,SAMPLE* s)
 {
+	(void)type; /* unused arg */
+
 	if (!s) return 0;
 
 	return (s->length*((s->flags&SF_16BITS)?2:1))+16;