diff --git a/CMakeLists.txt b/CMakeLists.txt
index bab2b90..169767e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -141,8 +141,7 @@ if(MSVC)
 		/EHs	# synchronous exceptions; also, extern "C" functions may throw exceptions
 		/W4
 		/wd4068 # ignore unrecognized pragmas
-		/wd4100	# unreferenced formal parameter
-		/wd4201 # nonstandard extension
+		/wd4201 # nonstandard extension (nameless struct)
 		/wd4244 # conversion from double to float
 		/wd4458 # declaration of variable hides class member
 		/MP		# multiprocessor compilation
@@ -153,7 +152,6 @@ else()
 		-Wextra
 		-Wshadow
 		-Wno-multichar
-		-Wno-unused-parameter
 		-Wno-unknown-pragmas
 		-fexceptions
 	)
diff --git a/src/Files/Files.cpp b/src/Files/Files.cpp
index 61c4b7a..fac01b7 100644
--- a/src/Files/Files.cpp
+++ b/src/Files/Files.cpp
@@ -352,6 +352,8 @@ OSErr GetEOF(short refNum, long* logEOF)
 
 OSErr SetEOF(short refNum, long logEOF)
 {
+	(void) refNum;
+	(void) logEOF;
 	TODO();
 	return unimpErr;
 }
diff --git a/src/Files/HostVolume.cpp b/src/Files/HostVolume.cpp
index 9823042..dc25cc9 100644
--- a/src/Files/HostVolume.cpp
+++ b/src/Files/HostVolume.cpp
@@ -303,6 +303,10 @@ OSErr HostVolume::DirCreate(long parentDirID, const std::string& directoryName,
 
 OSErr HostVolume::FSpCreate(const FSSpec* spec, OSType creator, OSType fileType, ScriptCode scriptTag)
 {
+	(void) creator;
+	(void) fileType;
+	(void) scriptTag;
+
 	std::ofstream df(ToPath(spec->parID, spec->cName));
 	df.close();
 	// TODO: we could write an AppleDouble file to save the creator/filetype.
diff --git a/src/Files/Resources.cpp b/src/Files/Resources.cpp
index ef15a67..ea93fe9 100644
--- a/src/Files/Resources.cpp
+++ b/src/Files/Resources.cpp
@@ -340,16 +340,25 @@ void RemoveResource(Handle theResource)
 
 void AddResource(Handle theData, ResType theType, short theID, const char* name)
 {
+	(void) theData;
+	(void) theType;
+	(void) theID;
+	(void) name;
+
 	TODO();
 }
 
 void ChangedResource(Handle theResource)
 {
+	(void) theResource;
+
 	TODO();
 }
 
 void WriteResource(Handle theResource)
 {
+	(void) theResource;
+
 	TODO();
 }
 
@@ -367,6 +376,8 @@ void DetachResource(Handle theResource)
 
 long GetResourceSizeOnDisk(Handle theResource)
 {
+	(void) theResource;
+
 	TODO();
 	return -1;
 }
diff --git a/src/Graphics/ColorManager.cpp b/src/Graphics/ColorManager.cpp
index d7bb817..8801c8f 100644
--- a/src/Graphics/ColorManager.cpp
+++ b/src/Graphics/ColorManager.cpp
@@ -2,41 +2,64 @@
 
 void ProtectEntry(short index, Boolean protect)
 {
+	(void) index;
+	(void) protect;
 	TODOMINOR();
 }
 
 void ReserveEntry(short index, Boolean reserve)
 {
+	(void) index;
+	(void) reserve;
 	TODOMINOR();
 }
 
 void SetEntries(short start, short count, CSpecArray aTable)
 {
+	(void) start;
+	(void) count;
+	(void) aTable;
 	TODOMINOR();
 }
 
 void GetEntryColor(PaletteHandle srcPalette, short srcEntry, RGBColor* dstRGB)
 {
+	(void) srcPalette;
+	(void) srcEntry;
+	(void) dstRGB;
 	TODOMINOR();
 }
 
 void SetEntryColor(PaletteHandle dstPalette, short dstEntry, const RGBColor* srcRGB)
 {
+	(void) dstPalette;
+	(void) dstEntry;
+	(void) srcRGB;
 	TODOMINOR();
 }
 
 PaletteHandle NewPalette(short entries, CTabHandle srcColors, short srcUsage, short srcTolerance)
 {
+	(void) entries;
+	(void) srcColors;
+	(void) srcUsage;
+	(void) srcTolerance;
 	TODOMINOR();
 	return nil;
 }
 
-void CopyPalette(PaletteHandle srcPalette, PaletteHandle dstPalette, short srcEntry,short dstEntry, short dstLength)
+void CopyPalette(PaletteHandle srcPalette, PaletteHandle dstPalette, short srcEntry, short dstEntry, short dstLength)
 {
+	(void) srcPalette;
+	(void) dstPalette;
+	(void) srcEntry;
+	(void) dstEntry;
+	(void) dstLength;
 	TODOMINOR();
 }
 
 void RestoreDeviceClut(GDHandle gdh)
 {
+	(void) gdh;
 	TODOMINOR();
 }
\ No newline at end of file
diff --git a/src/Graphics/Graphics.cpp b/src/Graphics/Graphics.cpp
index 7c9d77a..3db2ddf 100644
--- a/src/Graphics/Graphics.cpp
+++ b/src/Graphics/Graphics.cpp
@@ -213,6 +213,11 @@ static inline ARGBPixmap& GetImpl(PixMapPtr pixMap)
 
 OSErr NewGWorld(GWorldPtr* offscreenGWorld, short pixelDepth, const Rect* boundsRect, void* junk1, void* junk2, long junk3)
 {
+	(void) pixelDepth;
+	(void) junk1;
+	(void) junk2;
+	(void) junk3;
+
 	GrafPortImpl* impl = new GrafPortImpl(*boundsRect);
 	*offscreenGWorld = &impl->port;
 	return noErr;
@@ -231,6 +236,7 @@ void GetGWorld(CGrafPtr* port, GDHandle* gdh)
 
 void SetGWorld(CGrafPtr port, GDHandle gdh)
 {
+	(void) gdh;
 	SetPort(port);
 }
 
@@ -361,6 +367,8 @@ void PenNormal(void)
 
 void PenSize(short width, short height)
 {
+	(void) width;
+	(void) height;
 	TODOMINOR();
 }
 
@@ -462,6 +470,10 @@ void FrameRect(const Rect* r)
 
 void FrameArc(const Rect* r, short startAngle, short arcAngle)
 {
+	(void) r;
+	(void) startAngle;
+	(void) arcAngle;
+
 	TODOMINOR();
 }
 
@@ -508,7 +520,7 @@ void DrawPicture(PicHandle myPicture, const Rect* dstRect)
 
 	if (srcWidth != dstWidth || srcHeight != dstHeight)
 		TODOFATAL2("we only support dstRect with the same width/height as the source picture");
-	
+
 	for (int y = 0; y < dstHeight; y++)
 	{
 		memcpy(
@@ -529,6 +541,8 @@ void CopyBits(
 	void* maskRgn
 )
 {
+	(void) maskRgn;
+
 	auto& srcPM = GetImpl((PixMapPtr) srcBits);
 	auto& dstPM = GetImpl(dstBits);
 
diff --git a/src/Graphics/PICT.cpp b/src/Graphics/PICT.cpp
index c916154..2e746cd 100644
--- a/src/Graphics/PICT.cpp
+++ b/src/Graphics/PICT.cpp
@@ -136,6 +136,8 @@ static std::vector<T> UnpackBits(BigEndianIStream& f, UInt16 rowbytes, int packe
 template<typename T>
 static std::vector<T> UnpackAllRows(BigEndianIStream& f, int w, int h, UInt16 rowbytes, std::size_t expectedItemCount)
 {
+	(void) w;
+
 	LOG << "UnpackBits<" << typeid(T).name() << ">";
 
 	std::vector<T> data;
diff --git a/src/Memory/Memory.cpp b/src/Memory/Memory.cpp
index 60e8fac..6a574f8 100644
--- a/src/Memory/Memory.cpp
+++ b/src/Memory/Memory.cpp
@@ -132,6 +132,8 @@ Size GetHandleSize(Handle h)
 
 void SetHandleSize(Handle handle, Size byteCount)
 {
+	(void) handle;
+	(void) byteCount;
 	TODOFATAL();
 }
 
@@ -214,6 +216,8 @@ void Pomme_FlushPtrTracking(bool issueWarnings)
 	gLivePtrNums.clear();
 	gCurrentPtrBatch++;
 	gCurrentNumPtrsInBatch = 0;
+#else
+	(void) issueWarnings;
 #endif
 }
 
@@ -227,5 +231,8 @@ void BlockMove(const void* srcPtr, void* destPtr, Size byteCount)
 
 void BlockMoveData(const void* srcPtr, void* destPtr, Size byteCount)
 {
+	(void) srcPtr;
+	(void) destPtr;
+	(void) byteCount;
 	TODOFATAL();
 }
diff --git a/src/Pomme.cpp b/src/Pomme.cpp
index c6dfc53..a02610b 100644
--- a/src/Pomme.cpp
+++ b/src/Pomme.cpp
@@ -30,6 +30,8 @@ void ExitToShell()
 
 void SysBeep(short duration)
 {
+	(void) duration;
+
 #ifdef _WIN32
 	Pomme::Platform::Windows::SysBeep();
 #else
diff --git a/src/Pomme.h b/src/Pomme.h
index 0ed6823..e26f3ac 100644
--- a/src/Pomme.h
+++ b/src/Pomme.h
@@ -338,9 +338,6 @@ Boolean Button(void);
 //-----------------------------------------------------------------------------
 // Memory: No-op
 
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wunused-parameter"
-
 // No-op in Pomme.
 static inline void MaxApplZone(void) {}
 
@@ -355,42 +352,40 @@ static inline Size CompactMem(Size size) { return size; }
 static inline Size CompactMemSys(Size size) { return size; }
 
 // No-op in Pomme.
-static inline void PurgeMem(Size size) {}
+static inline void PurgeMem(Size size) { (void) size; }
 
 // No-op in Pomme.
-static inline void PurgeMemSys(Size size) {}
+static inline void PurgeMemSys(Size size) { (void) size; }
 
 // No-op in Pomme.
 // TODO: do something about `grow` and return a large integer to make it look like we have tons of memory.
-static inline Size MaxMem(Size* grow) { return 0; }
+static inline Size MaxMem(Size* grow) { (void) grow; return 0; }
 
 // No-op in Pomme.
-static inline void HNoPurge(Handle handle) {}	// no-op
+static inline void HNoPurge(Handle handle) { (void) handle; }	// no-op
 
 // No-op in Pomme.
-static inline void HLock(Handle handle) {}	// no-op
+static inline void HLock(Handle handle) { (void) handle; }	// no-op
 
 // No-op in Pomme.
-static inline void HLockHi(Handle handle) {}	// no-op
+static inline void HLockHi(Handle handle) { (void) handle; }	// no-op
 
 // No-op in Pomme.
-static inline void HUnlock(Handle handle) {}	// no-op
+static inline void HUnlock(Handle handle) { (void) handle; }	// no-op
 
 // No-op in Pomme.
-static inline void NoPurgePixels(PixMapHandle handle) {}	// no-op
+static inline void NoPurgePixels(PixMapHandle handle) { (void) handle; }	// no-op
 
 // No-op in Pomme.
 // To prevent the base address for an offscreen pixel image from being moved
 // while you draw into or copy from its pixel map.
-static inline Boolean LockPixels(PixMapHandle handle) { return true; }	// no-op; shall always return true
+static inline Boolean LockPixels(PixMapHandle handle) { (void) handle; return true; }	// no-op; shall always return true
 
 // No-op in Pomme.
 // If the Memory Manager started up in 24-bit mode, strips flag bits from 24-bit memory addresses;
 // otherwise (in 32-bit mode), returns the address unchanged.
 static inline Ptr StripAddress(Ptr ptr) { return ptr; }  // no-op
 
-#pragma GCC diagnostic pop
-
 //-----------------------------------------------------------------------------
 // Memory: Handle
 
diff --git a/src/SoundFormats/IMA4.cpp b/src/SoundFormats/IMA4.cpp
index b053416..951e67b 100644
--- a/src/SoundFormats/IMA4.cpp
+++ b/src/SoundFormats/IMA4.cpp
@@ -55,7 +55,7 @@ static inline int sign_extend(int val, unsigned bits)
 	return v.s >> shift;
 }
 
-static inline int adpcm_ima_qt_expand_nibble(ADPCMChannelStatus* c, int nibble, int shift)
+static inline int adpcm_ima_qt_expand_nibble(ADPCMChannelStatus* c, int nibble)
 {
 	int step_index;
 	int predictor;
@@ -122,9 +122,9 @@ update:
 		for (int m = 0; m < 32; m++)
 		{
 			int byte = (uint8_t) (*in++);
-			out[pos] = adpcm_ima_qt_expand_nibble(&cs, byte & 0x0F, 3);
+			out[pos] = adpcm_ima_qt_expand_nibble(&cs, byte & 0x0F);
 			pos += nChannels;
-			out[pos] = adpcm_ima_qt_expand_nibble(&cs, byte >> 4, 3);
+			out[pos] = adpcm_ima_qt_expand_nibble(&cs, byte >> 4);
 			pos += nChannels;
 		}
 	}
diff --git a/src/SoundFormats/xlaw.cpp b/src/SoundFormats/xlaw.cpp
index 3b3c6c7..4cf4a68 100644
--- a/src/SoundFormats/xlaw.cpp
+++ b/src/SoundFormats/xlaw.cpp
@@ -65,6 +65,8 @@ void Pomme::Sound::xlaw::Decode(
 	const std::span<const char> input,
 	const std::span<char> output)
 {
+	(void) nChannels;
+
 	if (2 * input.size() != output.size())
 	{
 		throw std::runtime_error("ulaw: incorrect input/output buffer sizes");
diff --git a/src/SoundMixer/SoundManager.cpp b/src/SoundMixer/SoundManager.cpp
index 952460b..e1e6ad1 100644
--- a/src/SoundMixer/SoundManager.cpp
+++ b/src/SoundMixer/SoundManager.cpp
@@ -106,6 +106,8 @@ OSErr SndDisposeChannel(SndChannelPtr macChanPtr, Boolean quietNow)
 
 OSErr SndChannelStatus(SndChannelPtr chan, short theLength, SCStatusPtr theStatus)
 {
+	(void) theLength;
+
 	*theStatus = {};
 
 	auto& source = GetChannelImpl(chan).source;
@@ -268,6 +270,9 @@ OSErr SndDoImmediate(SndChannelPtr chan, const SndCommand* cmd)
 // Not implemented yet, but you can probably use SndDoImmediateInstead.
 OSErr SndDoCommand(SndChannelPtr chan, const SndCommand* cmd, Boolean noWait)
 {
+	(void) chan;
+	(void) cmd;
+	(void) noWait;
 	TODOMINOR2("SndDoCommand isn't implemented yet, but you can probably use SndDoImmediate instead.");
 	return noErr;
 }
@@ -282,6 +287,9 @@ OSErr SndStartFilePlay(
 	FilePlayCompletionUPP				theCompletion,
 	Boolean								async)
 {
+	(void) bufferSize;
+	(void) theBuffer;
+
 	if (resNum != 0)
 	{
 		TODO2("playing snd resource not implemented yet, resource " << resNum);
diff --git a/src/SoundMixer/cmixer.cpp b/src/SoundMixer/cmixer.cpp
index d9c355f..c6166f8 100644
--- a/src/SoundMixer/cmixer.cpp
+++ b/src/SoundMixer/cmixer.cpp
@@ -92,6 +92,7 @@ void cmixer::InitWithSDL()
 	fmt.samples = 1024;
 	fmt.callback = [](void* udata, Uint8* stream, int size)
 	{
+		(void) udata;
 		gMixer.Process((int16_t*) stream, size / 2);
 	};
 
@@ -627,7 +628,7 @@ WavStream cmixer::LoadWAVFromFile(const char* path)
 	// Check header
 	if (memcmp(p, "RIFF", 4) || memcmp(p + 8, "WAVE", 4))
 		throw std::invalid_argument("bad wav header");
-	
+
 	// Find fmt subchunk
 	p = FindChunk(data, len, "fmt ", &sz);
 	if (!p)