ButterscotchRunner · MrPowerGamerBR · Jun 15, 2026 · Jun 12, 2026
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -8,7 +8,7 @@ project(butterscotch C)
 
 set(CMAKE_C_STANDARD 99)
 set(CMAKE_C_STANDARD_REQUIRED ON)
-add_compile_options(-Wall -Wextra -Werror -Wno-error=unused-parameter -Wno-error=unused-variable -Wno-error=unused-const-variable -Wno-error=unused-function)
+add_compile_options(-Wall -Wextra -Werror)
 
 set(PLATFORM "desktop" CACHE STRING "Platform backend")
 set(DESKTOP_BACKEND "" CACHE STRING "Desktop platform backend")

diff --git a/src/audio/miniaudio/ma_audio_system.c b/src/audio/miniaudio/ma_audio_system.c
@@ -9,7 +9,10 @@
 #include "stb_vorbis.c"
 
 #define MINIAUDIO_IMPLEMENTATION
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-parameter"
 #include "miniaudio.h"
+#pragma GCC diagnostic pop
 
 #include "ma_audio_system.h"
 #include "data_win.h"

diff --git a/src/audio/openal/al_audio_system.c b/src/audio/openal/al_audio_system.c
@@ -793,7 +793,7 @@ static float maGetSoundLength(AudioSystem* audio, int32_t soundOrInstance) {
 }
 
 static void maSetMasterGain(AudioSystem* audio, float gain) {
-    AlAudioSystem* ma = (AlAudioSystem*) audio;
+    (void)audio;
     alListenerf(AL_GAIN, gain);
 }
 

diff --git a/src/gl/gl_renderer.c b/src/gl/gl_renderer.c
@@ -403,12 +403,7 @@ static void glGpuSetShader(Renderer* renderer, int32_t ShaderIndex) {
     GLint gm_Matrices3 = glGetUniformLocation(Shader, "gm_Matrices[3]");
     GLint gm_Matrices4 = glGetUniformLocation(Shader, "gm_Matrices[4]");
 
-
-    GLint gm_FogStart = glGetUniformLocation(Shader, "gm_FogStart");
-    GLint gm_RcpFogRange = glGetUniformLocation(Shader, "gm_RcpFogRange");  
-    GLint gm_PS_FogEnabled = glGetUniformLocation(Shader, "gm_PS_FogEnabled");
     GLint gm_FogColour = glGetUniformLocation(Shader, "gm_FogColour");    
-    GLint gm_VS_FogEnabled = glGetUniformLocation(Shader, "gm_VS_FogEnabled");
 
     //Lights are for another time
 
@@ -1803,6 +1798,9 @@ static void glDrawSurface(Renderer* renderer, int32_t surfaceID, int32_t srcLeft
 }
 
 static int32_t glCreateSpriteFromSurface(Renderer* renderer, int32_t surfaceID, int32_t x, int32_t y, int32_t w, int32_t h, bool removeback, bool smooth, int32_t xorig, int32_t yorig) {
+    // TODO: implement these
+    (void)smooth;
+    (void)removeback;
     GLRenderer* gl = (GLRenderer*) renderer;
     DataWin* dw = renderer->dataWin;
 
@@ -1927,7 +1925,7 @@ static void glGpuSetBlendEnable(Renderer* renderer, bool enable) {
 }
 
 static bool glGpuGetBlendEnable(Renderer* renderer) {
-
+    (void)renderer;
     return glIsEnabled(GL_BLEND);
 }
 
@@ -2220,7 +2218,7 @@ static bool glShaderIsCompiled(Renderer* renderer, int32_t shaderID) {
     return gl->gmlShaderCompiled[shaderID];
 }
 
-static bool glShadersSupported(Renderer* renderer) {
+static bool glShadersSupported(void) {
     return true;
 }
 

diff --git a/src/gl_legacy/gl_legacy_renderer.c b/src/gl_legacy/gl_legacy_renderer.c
@@ -1226,6 +1226,9 @@ static uint32_t findOrAllocTpagSlot(DataWin* dw, uint32_t originalTpagCount) {
 }
 
 static int32_t glCreateSpriteFromSurface(Renderer* renderer, int32_t surfaceID, int32_t x, int32_t y, int32_t w, int32_t h, bool removeback, bool smooth, int32_t xorig, int32_t yorig) {
+    // TODO: implement these
+    (void)smooth;
+    (void)removeback;
     GLLegacyRenderer* gl = (GLLegacyRenderer*) renderer;
     DataWin* dw = renderer->dataWin;
 
@@ -1340,7 +1343,8 @@ static void glGpuSetBlendModeExt(MAYBE_UNUSED Renderer* renderer, int32_t sfacto
     glBlendFunc(GLCommon_blendFactorToGL(sfactor), GLCommon_blendFactorToGL(dfactor));
 }
 
-static void glGpuSetBlendEnable(MAYBE_UNUSED Renderer* renderer, bool enable) {
+static void glGpuSetBlendEnable(Renderer* renderer, bool enable) {
+    (void)renderer;
     enable ? glEnable(GL_BLEND) : glDisable(GL_BLEND);
 }
 
@@ -1680,7 +1684,7 @@ static void glShaderSetUniformF(MAYBE_UNUSED Renderer* renderer, MAYBE_UNUSED in
 static void glShaderSetUniformFArray(MAYBE_UNUSED Renderer* renderer, MAYBE_UNUSED int32_t handle, MAYBE_UNUSED float* values, MAYBE_UNUSED uint32_t count) {}
 static void glShaderSetUniformI(MAYBE_UNUSED Renderer* renderer, MAYBE_UNUSED int32_t handle, MAYBE_UNUSED int32_t count, MAYBE_UNUSED int32_t value1, MAYBE_UNUSED int32_t value2, MAYBE_UNUSED int32_t value3, MAYBE_UNUSED int32_t value4) {}
 static bool glShaderIsCompiled(MAYBE_UNUSED Renderer* renderer, MAYBE_UNUSED int32_t shader) { return false; }
-static bool glShadersSupported(MAYBE_UNUSED Renderer* renderer) { return false; }
+static bool glShadersSupported(void) { return false; }
 
 static RendererVtable glVtable;
 

diff --git a/src/ps2/gs_renderer.c b/src/ps2/gs_renderer.c
@@ -1,11 +1,15 @@
 #include "gs_renderer.h"
 
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-parameter"
+#include <gsInline.h>
+#pragma GCC diagnostic pop
+
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
 #include <malloc.h>
 #include <kernel.h>
-#include <gsInline.h>
 
 #include "binary_reader.h"
 #include "binary_utils.h"
@@ -2877,7 +2881,11 @@ static void gsDrawSurface(Renderer* renderer, int32_t surfaceID, int32_t srcLeft
     // Restore default REPEAT so subsequent atlas draws aren't stuck on this region.
     gsKit_set_clamp(gs->gsGlobal, GS_CMODE_REPEAT);
 }
-static void gsSurfaceResize(MAYBE_UNUSED Renderer* renderer, int32_t surfaceID, int32_t width, int32_t height) {
+static void gsSurfaceResize(Renderer* renderer, int32_t surfaceID, int32_t width, int32_t height) {
+    (void)renderer;
+    (void)surfaceID;
+    (void)width;
+    (void)height;
     // No-op: PS2 doesn't actually resize anything
 }
 
@@ -3052,7 +3060,7 @@ static void gsShaderSetUniformF(MAYBE_UNUSED Renderer* renderer, MAYBE_UNUSED in
 static void gsShaderSetUniformFArray(MAYBE_UNUSED Renderer* renderer, MAYBE_UNUSED int32_t handle, MAYBE_UNUSED float* values, MAYBE_UNUSED uint32_t count) {}
 static void gsShaderSetUniformI(MAYBE_UNUSED Renderer* renderer, MAYBE_UNUSED int32_t handle, MAYBE_UNUSED int32_t count, MAYBE_UNUSED int32_t value1, MAYBE_UNUSED int32_t value2, MAYBE_UNUSED int32_t value3, MAYBE_UNUSED int32_t value4) {}
 static bool gsShaderIsCompiled(MAYBE_UNUSED Renderer* renderer, MAYBE_UNUSED int32_t shader) { return false; }
-static bool gsShadersSupported(MAYBE_UNUSED Renderer* renderer) { return false; }
+static bool gsShadersSupported(void) { return false; }
 
 static RendererVtable gsVtable;
 

diff --git a/src/ps2/main.c b/src/ps2/main.c
@@ -238,6 +238,7 @@ static unsigned int hidUsageToAsciiChar(uint8_t hid, bool shift) {
 
 
 int main(int argc, char* argv[]) {
+    (void)argc;
     SifInitRpc(0);
     sbv_patch_enable_lmb();
 
@@ -552,7 +553,6 @@ int main(int argc, char* argv[]) {
     // ===[ Main Loop ]===
     bool debugOverlayStartEnabled = JsonReader_getBool(JsonReader_getObject(configRoot, "debugOverlayEnabled"));
     PS2Overlay_setDebugOverlayState(debugOverlayStartEnabled ? STATS_ENABLED : STATS_DISABLED, runner);
-    uint16_t prevOverlayPadButtons = 0xFFFF;
 
     u64 lastFrameStartTime = GetTimerSystemTime(); // for delta_time
     while (!runner->shouldExit) {

diff --git a/src/ps2/ps2_file_system.c b/src/ps2/ps2_file_system.c
@@ -486,18 +486,26 @@ static void ps2BinaryRewrite(MAYBE_UNUSED FileSystem* fs, void* handle) {
 
 //Directory, pretty much stubbed
 static bool ps2DirectoryExists(FileSystem* fs, const char* relativePath) {
+    (void)fs;
+    (void)relativePath;
     return true;
 }
 
 static bool ps2CreateDirectory(FileSystem* fs, const char* relativePath) {
+    (void)fs;
+    (void)relativePath;
     return true;
 }
 
 static bool ps2DeleteDirectory(FileSystem* fs, const char* relativePath) {
+    (void)fs;
+    (void)relativePath;
     return true;
 }
 
-static FileSystemDirEntry* ps2ListDirectory(MAYBE_UNUSED FileSystem* fs, MAYBE_UNUSED const char* relativeDirPath) {
+static FileSystemDirEntry* ps2ListDirectory(FileSystem* fs, const char* relativeDirPath) {
+    (void)fs;
+    (void)relativeDirPath;
     return nullptr;
 }
 

diff --git a/src/ps2/ps2_overlay.c b/src/ps2/ps2_overlay.c
@@ -9,7 +9,6 @@
 
 // ===[ Loading Screen ]===
 
-static const int PROFILER_WINDOW_FRAMES = 60;
 static bool gPS2OverlayInitialized = false;
 static PS2Overlay gOverlay = { 0 };
 
@@ -113,6 +112,8 @@ void PS2Overlay_setDebugOverlayState(DebugOverlayState state, Runner* runner) {
     Profiler_setEnabled(&runner->vmContext->profiler, PS2Overlay_getDebugOverlayState() == STATS_ENABLED_WITH_PROFILER);
     gOverlay.profilerFramesInWindow = 0;
     gOverlay.profilerOverlayText[0] = '\0';
+#else
+    (void)runner;
 #endif
 }
 
@@ -124,6 +125,8 @@ void PS2Overlay_toggleDebugOverlay(Runner* runner) {
     Profiler_setEnabled(&runner->vmContext->profiler, PS2Overlay_getDebugOverlayState() == STATS_ENABLED_WITH_PROFILER);
     gOverlay.profilerFramesInWindow = 0;
     gOverlay.profilerOverlayText[0] = '\0';
+#else
+    (void)runner;
 #endif
 }
 

diff --git a/src/ps3/main.c b/src/ps3/main.c
@@ -88,6 +88,8 @@ bool shouldExit = false;
 // ===[ MAIN ]===
 
 static void sys_callback(uint64_t status, uint64_t param, void* userdata) {
+    (void)param;
+    (void)userdata;
     switch (status) {
         case SYSUTIL_EXIT_GAME:
             shouldExit = true;
@@ -156,7 +158,8 @@ char *str_replace(char *orig, char *rep, char *with) {
 static char buffer[9999];
 int main(int argc, char* argv[]) {
     printf("%s\n", argv[0]);
-    strcpy(buffer, argv[0]);
+    if (argc > 0)
+        strcpy(buffer, argv[0]);
     char* tmp = str_replace(buffer, "butterscotch.elf", "");
 	char* tmp2 = str_replace(tmp, "butterscotch.self", "");
     char* tmp3 = str_replace(tmp2, "EBOOT.BIN", "");

diff --git a/src/renderer.h b/src/renderer.h
@@ -146,7 +146,7 @@ typedef struct {
     bool (*textureGetUVs)(Renderer* renderer, uint32_t texID, float* outUVs);
     void (*textureSetStage)(Renderer* renderer, int32_t slot, uint32_t texID);
     bool (*shaderIsCompiled)(Renderer* renderer, int32_t shader);
-    bool (*shadersSupported)(Renderer* renderer);
+    bool (*shadersSupported)(void);
 } RendererVtable;
 
 // ===[ Renderer Base Struct ]===

diff --git a/src/runner.h b/src/runner.h
@@ -712,6 +712,8 @@ static inline void Runner_setActiveState(Runner* runner, Instance* instance, boo
             fprintf(stderr, "VM: Instance %s (instanceId=%d,objectIndex=%d) marked as %s at (%f, %f)\n", objDef->name, instance->instanceId, instance->objectIndex, active ? "active" : "inactive", instance->x, instance->y);
         }
     }
+#else
+    (void)runner;
 #endif
 
     instance->active = active;

diff --git a/src/vm.c b/src/vm.c
@@ -104,11 +104,15 @@ static int32_t stackPopInt32(VMContext* ctx) {
     return value;
 }
 
+#if IS_WAD17_OR_HIGHER_ENABLED
+
 static RValue* stackPeek(VMContext* ctx) {
     require(ctx->stack.top > 0);
     return &ctx->stack.slots[ctx->stack.top - 1];
 }
 
+#endif
+
 // ===[ Instruction Decoding ]===
 
 static uint8_t instrOpcode(uint32_t instr) {
@@ -267,6 +271,7 @@ static GMLArray* VM_arraySetWithCoW(VMContext* ctx, RValue* slot, int32_t index,
 #if IS_WAD17_OR_HIGHER_ENABLED
     intendedOwner = IS_WAD17_OR_HIGHER(ctx) ? ctx->currentArrayOwner : (void*) slot;
 #else
+    (void)ctx;
     intendedOwner = (void*) slot;
 #endif
 
@@ -418,11 +423,15 @@ static ArrayAccess popArrayAccess(VMContext* ctx, uint32_t varRef) {
 // ===[ Variable Resolution ]===
 
 // Returns the object name for an instance, or "<global_scope>" for the global scope dummy instance
+#ifdef ENABLE_VM_TRACING
+
 static const char* instanceObjectName(VMContext* ctx, Instance* inst) {
     if (inst->objectIndex == STRUCT_OBJECT_INDEX) return "<global_scope>";
     return ctx->dataWin->objt.objects[inst->objectIndex].name;
 }
 
+#endif
+
 static Variable* resolveVarDef(VMContext* ctx, uint32_t varRef) {
     uint32_t varIndex = varRef & 0x07FFFFFF;
     require(ctx->dataWin->vari.variableCount > varIndex);
@@ -638,6 +647,8 @@ static bool tryReadInstanceVarOrStatic(VMContext* ctx, Instance* instance, int32
         *out = staticVal;
         return true;
     }
+#else
+    (void)ctx;
 #endif
     return false;
 }
@@ -1360,7 +1371,7 @@ static inline RValue coerceIntStoreToReal(RValue val, uint8_t type2) {
     return val;
 }
 
-static void handlePop(VMContext* ctx, uint32_t instr, uint8_t type1, uint8_t type2, uint32_t varRef, uint8_t varType, int32_t instanceType) {
+static void handlePop(VMContext* ctx, uint8_t type1, uint8_t type2, uint32_t varRef, uint8_t varType, int32_t instanceType) {
     RValue val;
     int32_t arrayIndex = -1;
 
@@ -3016,7 +3027,7 @@ static RValue executeLoop(VMContext* ctx) {
                     val = coerceIntStoreToReal(val, type2);
                     resolveVariableWrite(ctx, instanceType, varRef, val);
                 } else {
-                    handlePop(ctx, instr, type1, type2, varRef, varType, instanceType);
+                    handlePop(ctx, type1, type2, varRef, varType, instanceType);
                 }
                 break;
             }
@@ -3926,7 +3937,7 @@ static void disasmFormatVar(VMContext* ctx, const uint8_t* extraData, const char
 }
 
 // Returns stack effect comment for a variable access instruction
-static void disasmFormatVarComment(VMContext* ctx, const uint8_t* extraData, bool isPop, char* buf, size_t bufSize) {
+static void disasmFormatVarComment(const uint8_t* extraData, bool isPop, char* buf, size_t bufSize) {
     uint32_t varRef = resolveVarOperand(extraData);
     uint8_t varType = (varRef >> 24) & 0xF8;
     if (isPop) {
@@ -4038,7 +4049,7 @@ static void formatInstruction(VMContext* ctx, const uint8_t* bytecodeBase, uint3
                 case GML_TYPE_VARIABLE:
                     snprintf(opcodeStr, opcodeSize, "Push.v");
                     disasmFormatVar(ctx, extraData, nullptr, (int32_t) instType, operandStr, operandSize);
-                    disasmFormatVarComment(ctx, extraData, false, commentStr, commentSize);
+                    disasmFormatVarComment(extraData, false, commentStr, commentSize);
                     break;
                 case GML_TYPE_INT16:
                     snprintf(opcodeStr, opcodeSize, "Push.e");
@@ -4057,17 +4068,17 @@ static void formatInstruction(VMContext* ctx, const uint8_t* bytecodeBase, uint3
         case OP_PUSHLOC:
             snprintf(opcodeStr, opcodeSize, "PushLoc.v");
             disasmFormatVar(ctx, extraData, "local", (int32_t) instType, operandStr, operandSize);
-            disasmFormatVarComment(ctx, extraData, false, commentStr, commentSize);
+            disasmFormatVarComment(extraData, false, commentStr, commentSize);
             break;
         case OP_PUSHGLB:
             snprintf(opcodeStr, opcodeSize, "PushGlb.v");
             disasmFormatVar(ctx, extraData, "global", (int32_t) instType, operandStr, operandSize);
-            disasmFormatVarComment(ctx, extraData, false, commentStr, commentSize);
+            disasmFormatVarComment(extraData, false, commentStr, commentSize);
             break;
         case OP_PUSHBLTN:
             snprintf(opcodeStr, opcodeSize, "PushBltn.v");
             disasmFormatVar(ctx, extraData, nullptr, (int32_t) instType, operandStr, operandSize);
-            disasmFormatVarComment(ctx, extraData, false, commentStr, commentSize);
+            disasmFormatVarComment(extraData, false, commentStr, commentSize);
             break;
 
         // PushI (int16 immediate)
@@ -4081,7 +4092,7 @@ static void formatInstruction(VMContext* ctx, const uint8_t* bytecodeBase, uint3
         case OP_POP:
             snprintf(opcodeStr, opcodeSize, "Pop.%c.%c", gmlTypeChar(type1), gmlTypeChar(type2));
             disasmFormatVar(ctx, extraData, nullptr, (int32_t) instType, operandStr, operandSize);
-            disasmFormatVarComment(ctx, extraData, true, commentStr, commentSize);
+            disasmFormatVarComment(extraData, true, commentStr, commentSize);
             break;
 
         // Unconditional branch
-Original file line number
+Diff line change
@@ Expand Up @@
                 fprintf(stderr, "VM: Instance %s (instanceId=%d,objectIndex=%d) marked as %s at (%f, %f)\n", objDef->name, instance->instanceId, instance->objectIndex, active ? "active" : "inactive", instance->x, instance->y);
             }
         }
+    #else
+        (void)runner;
     #endif
         instance->active = active;
@@ Expand Down @@