diff --git a/src/common/cd_image_cue.cpp b/src/common/cd_image_cue.cpp
index e5a301e0c..12d68a549 100644
--- a/src/common/cd_image_cue.cpp
+++ b/src/common/cd_image_cue.cpp
@@ -7,6 +7,7 @@
 #include "log.h"
 #include <algorithm>
 #include <cerrno>
+#include <cinttypes>
 #include <map>
 Log_SetChannel(CDImageCueSheet);
 
@@ -140,11 +141,11 @@ bool CDImageCueSheet::OpenAndParse(const char* filename, Common::Error* error)
       file_size /= track_sector_size;
       if (track_start >= file_size)
       {
-        Log_ErrorPrintf("Failed to open track %u in '%s': track start is out of range (%ld vs %ld)", track_num,
+        Log_ErrorPrintf("Failed to open track %u in '%s': track start is out of range (%u vs %" PRIu64 ")", track_num,
                         filename, track_start, file_size);
         if (error)
         {
-          error->SetFormattedMessage("Failed to open track %u in '%s': track start is out of range (%ld vs %ld)",
+          error->SetFormattedMessage("Failed to open track %u in '%s': track start is out of range (%u vs %" PRIu64 ")",
                                      track_num, filename, track_start, file_size);
         }
         return false;
diff --git a/src/common/cd_image_ecm.cpp b/src/common/cd_image_ecm.cpp
index 999fc7973..dcf9252e9 100644
--- a/src/common/cd_image_ecm.cpp
+++ b/src/common/cd_image_ecm.cpp
@@ -40,7 +40,6 @@ static constexpr std::array<u32, 256> ComputeEDCLUT()
   std::array<u32, 256> edc_lut{};
   for (u32 i = 0; i < 256; i++)
   {
-    u32 j = (i << 1) ^ (i & 0x80 ? 0x11D : 0);
     u32 edc = i;
     for (u32 k = 0; k < 8; k++)
       edc = (edc >> 1) ^ (edc & 1 ? 0xD8018001 : 0);
@@ -252,7 +251,6 @@ bool CDImageEcm::Open(const char* filename, Common::Error* error)
 
   for (;;)
   {
-    long n = std::ftell(m_fp);
     int bits = std::fgetc(m_fp);
     if (bits == EOF)
     {
diff --git a/src/common/cd_image_pbp.cpp b/src/common/cd_image_pbp.cpp
index 595b8e3e7..d8a656298 100644
--- a/src/common/cd_image_pbp.cpp
+++ b/src/common/cd_image_pbp.cpp
@@ -98,7 +98,7 @@ static constexpr bool HostIsLittleEndian()
   {
     u8 a[4];
     u32 b;
-  } test_val = {1};
+  } test_val = {{1}};
 
   return test_val.a[0] == 1;
 }
diff --git a/src/common/cd_image_ppf.cpp b/src/common/cd_image_ppf.cpp
index ef2c1120d..c32bd0412 100644
--- a/src/common/cd_image_ppf.cpp
+++ b/src/common/cd_image_ppf.cpp
@@ -77,11 +77,11 @@ bool CDImagePPF::Open(const char* filename, std::unique_ptr<CDImage> parent_imag
   m_indices = parent_image->GetIndices();
   m_parent_image = std::move(parent_image);
 
-  if (magic == '3FPP')
+  if (magic == 0x33465050) // PPF3
     return ReadV3Patch(fp.get());
-  else if (magic == '2FPP')
+  else if (magic == 0x32465050) // PPF2
     return ReadV2Patch(fp.get());
-  else if (magic == '1FPP')
+  else if (magic == 0x31465050) // PPF1
     return ReadV1Patch(fp.get());
 
   Log_ErrorPrintf("Unknown PPF magic %08X", magic);
@@ -99,7 +99,7 @@ u32 CDImagePPF::ReadFileIDDiz(std::FILE* fp, u32 version)
     return 0;
   }
 
-  if (magic != 'ZID.')
+  if (magic != 0x5A49442E) // .DIZ
     return 0;
 
   u32 dlen = 0;
diff --git a/src/common/cue_parser.cpp b/src/common/cue_parser.cpp
index acfa2faef..a0b32e863 100644
--- a/src/common/cue_parser.cpp
+++ b/src/common/cue_parser.cpp
@@ -120,8 +120,6 @@ std::string_view File::GetToken(const char*& line)
 
 std::optional<MSF> File::GetMSF(const std::string_view& token)
 {
-  const u32 len = static_cast<u32>(token.length());
-
   static const s32 max_values[] = {std::numeric_limits<s32>::max(), 60, 75};
 
   u32 parts[3] = {};
@@ -190,7 +188,7 @@ bool File::ParseLine(const char* line, u32 line_number, Common::Error* error)
 
   if (TokenMatch(command, "POSTGAP"))
   {
-    Log_WarningPrintf("Ignoring '*%s' command", static_cast<int>(command.size()), command.data());
+    Log_WarningPrintf("Ignoring '%*s' command", static_cast<int>(command.size()), command.data());
     return true;
   }
 
diff --git a/src/common/file_system.cpp b/src/common/file_system.cpp
index a3ee5e19b..76761993d 100644
--- a/src/common/file_system.cpp
+++ b/src/common/file_system.cpp
@@ -221,7 +221,6 @@ static bool FindUriFiles(const char* path, const char* pattern, u32 flags, FindR
   // small speed optimization for '*' case
   bool hasWildCards = false;
   bool wildCardMatchAll = false;
-  u32 nFiles = 0;
   if (std::strpbrk(pattern, "*?") != nullptr)
   {
     hasWildCards = true;
diff --git a/src/common/gl/context_egl_wayland.cpp b/src/common/gl/context_egl_wayland.cpp
index 49596e152..2046c44f8 100644
--- a/src/common/gl/context_egl_wayland.cpp
+++ b/src/common/gl/context_egl_wayland.cpp
@@ -1,7 +1,5 @@
 #include "context_egl_wayland.h"
-#include "../log.h"
 #include <wayland-egl.h>
-Log_SetChannel(GL::ContextEGLWayland);
 
 namespace GL {
 ContextEGLWayland::ContextEGLWayland(const WindowInfo& wi) : ContextEGL(wi) {}
diff --git a/src/common/memory_arena.cpp b/src/common/memory_arena.cpp
index 74e15092a..a53b8f1b8 100644
--- a/src/common/memory_arena.cpp
+++ b/src/common/memory_arena.cpp
@@ -143,6 +143,9 @@ bool MemoryArena::Create(size_t size, bool writable, bool executable)
     return false;
   }
 
+  m_size = size;
+  m_writable = writable;
+  m_executable = executable;
   return true;
 #elif defined(__ANDROID__)
   m_shmem_fd = AshmemCreateFileMapping(file_mapping_name.c_str(), size);
@@ -152,6 +155,9 @@ bool MemoryArena::Create(size_t size, bool writable, bool executable)
     return false;
   }
 
+  m_size = size;
+  m_writable = writable;
+  m_executable = executable;
   return true;
 #elif defined(__linux__)
   m_shmem_fd = shm_open(file_mapping_name.c_str(), O_CREAT | O_EXCL | (writable ? O_RDWR : O_RDONLY), 0600);
@@ -171,6 +177,9 @@ bool MemoryArena::Create(size_t size, bool writable, bool executable)
     return false;
   }
 
+  m_size = size;
+  m_writable = writable;
+  m_executable = executable;
   return true;
 #elif defined(__APPLE__) || defined(__FreeBSD__)
 #if defined(__APPLE__)
@@ -197,6 +206,9 @@ bool MemoryArena::Create(size_t size, bool writable, bool executable)
     return false;
   }
 
+  m_size = size;
+  m_writable = writable;
+  m_executable = executable;
   return true;
 #else
   return false;
diff --git a/src/common/memory_arena.h b/src/common/memory_arena.h
index fee8ae214..0d6a262f5 100644
--- a/src/common/memory_arena.h
+++ b/src/common/memory_arena.h
@@ -37,6 +37,10 @@ public:
 
   static void* FindBaseAddressForMapping(size_t size);
 
+  ALWAYS_INLINE size_t GetSize() const { return m_size; }
+  ALWAYS_INLINE bool IsWritable() const { return m_writable; }
+  ALWAYS_INLINE bool IsExecutable() const { return m_executable; }
+
   bool IsValid() const;
   bool Create(size_t size, bool writable, bool executable);
   void Destroy();
diff --git a/src/common/shiftjis.cpp b/src/common/shiftjis.cpp
index 6dead7883..669a9bb13 100644
--- a/src/common/shiftjis.cpp
+++ b/src/common/shiftjis.cpp
@@ -212,7 +212,7 @@ char* sjis2utf8(char* input)
   // Simplify the input and decode standard ASCII characters
   sjis2ascii(input);
 
-  int len = static_cast<int>(std::strlen(input));
+  size_t len = static_cast<int>(std::strlen(input));
   char* output = reinterpret_cast<char*>(
     std::malloc(3 * len)); // ShiftJis won't give 4byte UTF8, so max. 3 byte per input char are needed
   size_t indexInput = 0, indexOutput = 0;
diff --git a/src/core/cpu_recompiler_code_generator_aarch32.cpp b/src/core/cpu_recompiler_code_generator_aarch32.cpp
index 76bc5e2be..2cb83f2ba 100644
--- a/src/core/cpu_recompiler_code_generator_aarch32.cpp
+++ b/src/core/cpu_recompiler_code_generator_aarch32.cpp
@@ -23,7 +23,6 @@ constexpr HostReg RARG2 = 1;
 constexpr HostReg RARG3 = 2;
 constexpr HostReg RARG4 = 3;
 constexpr HostReg RSCRATCH = 12;
-constexpr u32 FUNCTION_CALL_STACK_ALIGNMENT = 16;
 constexpr u32 FUNCTION_CALL_SHADOW_SPACE = 32;
 constexpr u32 FUNCTION_CALLEE_SAVED_SPACE_RESERVE = 80;  // 8 registers
 constexpr u32 FUNCTION_CALLER_SAVED_SPACE_RESERVE = 144; // 18 registers -> 224 bytes
@@ -174,12 +173,14 @@ void CodeGenerator::EmitBeginBlock()
   // Save the link register, since we'll be calling functions.
   const bool link_reg_allocated = m_register_cache.AllocateHostReg(14);
   DebugAssert(link_reg_allocated);
+  UNREFERENCED_VARIABLE(link_reg_allocated);
   m_register_cache.AssumeCalleeSavedRegistersAreSaved();
 
   // Store the CPU struct pointer. TODO: make this better.
   const bool cpu_reg_allocated = m_register_cache.AllocateHostReg(RCPUPTR);
   // m_emit->Mov(GetCPUPtrReg(), reinterpret_cast<uintptr_t>(&g_state));
   DebugAssert(cpu_reg_allocated);
+  UNREFERENCED_VARIABLE(cpu_reg_allocated);
 }
 
 void CodeGenerator::EmitEndBlock()
diff --git a/src/core/cpu_recompiler_code_generator_aarch64.cpp b/src/core/cpu_recompiler_code_generator_aarch64.cpp
index 15f77cfc9..52f3fc32e 100644
--- a/src/core/cpu_recompiler_code_generator_aarch64.cpp
+++ b/src/core/cpu_recompiler_code_generator_aarch64.cpp
@@ -21,7 +21,6 @@ constexpr HostReg RARG2 = 1;
 constexpr HostReg RARG3 = 2;
 constexpr HostReg RARG4 = 3;
 constexpr HostReg RSCRATCH = 8;
-constexpr u64 FUNCTION_CALL_STACK_ALIGNMENT = 16;
 constexpr u64 FUNCTION_CALL_SHADOW_SPACE = 32;
 constexpr u64 FUNCTION_CALLEE_SAVED_SPACE_RESERVE = 80;  // 8 registers
 constexpr u64 FUNCTION_CALLER_SAVED_SPACE_RESERVE = 144; // 18 registers -> 224 bytes
diff --git a/src/core/cpu_recompiler_code_generator_x64.cpp b/src/core/cpu_recompiler_code_generator_x64.cpp
index 7606f7c65..d08c766a6 100644
--- a/src/core/cpu_recompiler_code_generator_x64.cpp
+++ b/src/core/cpu_recompiler_code_generator_x64.cpp
@@ -213,6 +213,7 @@ void CodeGenerator::EmitBeginBlock()
   // Store the CPU struct pointer.
   const bool cpu_reg_allocated = m_register_cache.AllocateHostReg(RCPUPTR);
   DebugAssert(cpu_reg_allocated);
+  UNREFERENCED_VARIABLE(cpu_reg_allocated);
   // m_emit->mov(GetCPUPtrReg(), reinterpret_cast<size_t>(&g_state));
 
   // If there's loadstore instructions, preload the fastmem base.
@@ -220,6 +221,7 @@ void CodeGenerator::EmitBeginBlock()
   {
     const bool fastmem_reg_allocated = m_register_cache.AllocateHostReg(RMEMBASEPTR);
     Assert(fastmem_reg_allocated);
+    UNREFERENCED_VARIABLE(fastmem_reg_allocated);
     m_emit->mov(GetFastmemBasePtrReg(), m_emit->qword[GetCPUPtrReg() + offsetof(CPU::State, fastmem_base)]);
   }
 }
diff --git a/src/core/gpu_hw_opengl.cpp b/src/core/gpu_hw_opengl.cpp
index 290f08665..5489b4d16 100644
--- a/src/core/gpu_hw_opengl.cpp
+++ b/src/core/gpu_hw_opengl.cpp
@@ -334,7 +334,7 @@ void GPU_HW_OpenGL::SetCapabilities(HostDisplay* host_display)
     GLint max_texel_buffer_size;
     glGetIntegerv(GL_MAX_TEXTURE_BUFFER_SIZE, reinterpret_cast<GLint*>(&max_texel_buffer_size));
     Log_InfoPrintf("Max texel buffer size: %u", max_texel_buffer_size);
-    if (max_texel_buffer_size < VRAM_WIDTH * VRAM_HEIGHT)
+    if (max_texel_buffer_size < static_cast<int>(VRAM_WIDTH * VRAM_HEIGHT))
     {
       Log_WarningPrintf("Maximum texture buffer size is less than VRAM size, not using texel buffers.");
       m_use_texture_buffer_for_vram_writes = false;
diff --git a/src/core/negcon.cpp b/src/core/negcon.cpp
index 1c109df0b..4a9846698 100644
--- a/src/core/negcon.cpp
+++ b/src/core/negcon.cpp
@@ -293,8 +293,8 @@ u32 NeGcon::StaticGetVibrationMotorCount()
 Controller::SettingList NeGcon::StaticGetSettings()
 {
   static constexpr std::array<SettingInfo, 1> settings = {
-    {SettingInfo::Type::Float, "SteeringDeadzone", TRANSLATABLE("NeGcon", "Steering Axis Deadzone"),
-     TRANSLATABLE("NeGcon", "Sets deadzone size for steering axis."), "0.00f", "0.00f", "0.99f", "0.01f"}};
+    {{SettingInfo::Type::Float, "SteeringDeadzone", TRANSLATABLE("NeGcon", "Steering Axis Deadzone"),
+      TRANSLATABLE("NeGcon", "Sets deadzone size for steering axis."), "0.00f", "0.00f", "0.99f", "0.01f"}}};
 
   return SettingList(settings.begin(), settings.end());
 }
diff --git a/src/core/pad.cpp b/src/core/pad.cpp
index 8ce4151b6..8f9e09847 100644
--- a/src/core/pad.cpp
+++ b/src/core/pad.cpp
@@ -82,8 +82,8 @@ bool Pad::DoStateController(StateWrapper& sw, u32 i)
 
     // dev-friendly untranslated console log.
     Log_DevPrintf("Controller type mismatch in slot %u: state=%s(%u) ui=%s(%u) load_from_state=%s", i + 1u,
-                  Settings::GetControllerTypeName(state_controller_type), state_controller_type,
-                  Settings::GetControllerTypeName(controller_type), controller_type,
+                  Settings::GetControllerTypeName(state_controller_type), static_cast<unsigned>(state_controller_type),
+                  Settings::GetControllerTypeName(controller_type), static_cast<unsigned>(controller_type),
                   g_settings.load_devices_from_save_states ? "yes" : "no");
 
     if (g_settings.load_devices_from_save_states)
diff --git a/src/core/pgxp.cpp b/src/core/pgxp.cpp
index 9ebb8f7bd..4bec5bc45 100644
--- a/src/core/pgxp.cpp
+++ b/src/core/pgxp.cpp
@@ -212,10 +212,7 @@ double ALWAYS_INLINE_RELEASE f16Overflow(double in)
 
 // pgxp_mem.c
 static void PGXP_InitMem();
-static const u32 UserMemOffset = 0;
 static const u32 ScratchOffset = 2048 * 1024 / 4;
-static const u32 RegisterOffset = 2 * 2048 * 1024 / 4;
-static const u32 InvalidAddress = 3 * 2048 * 1024 / 4;
 
 void PGXP_InitMem()
 {
diff --git a/src/core/system.cpp b/src/core/system.cpp
index 4e814f4e5..43b69f4e3 100644
--- a/src/core/system.cpp
+++ b/src/core/system.cpp
@@ -1906,9 +1906,6 @@ void UpdateMemoryCardTypes()
 
 void UpdatePerGameMemoryCards()
 {
-  // Disable memory cards when running PSFs.
-  const bool is_running_psf = !s_running_game_path.empty() && IsPsfFileName(s_running_game_path.c_str());
-
   for (u32 i = 0; i < NUM_CONTROLLER_AND_CARD_PORTS; i++)
   {
     const MemoryCardType type = g_settings.memory_card_types[i];
diff --git a/src/duckstation-nogui/evdev_key_names.h b/src/duckstation-nogui/evdev_key_names.h
index 208d19bba..27b920ab2 100644
--- a/src/duckstation-nogui/evdev_key_names.h
+++ b/src/duckstation-nogui/evdev_key_names.h
@@ -258,13 +258,13 @@ static const std::map<int, const char*> s_evdev_key_names = {{KEY_ESC, "Escape"}
                                                              {KEY_RFKILL, "Rfkill"},
                                                              {KEY_MICMUTE, "Micmute"}};
 
-static const char* GetKeyName(int key)
+static inline const char* GetKeyName(int key)
 {
   const auto it = s_evdev_key_names.find(key);
   return it == s_evdev_key_names.end() ? nullptr : it->second;
 }
 
-static std::optional<int> GetKeyCodeForName(const std::string_view key_name)
+static inline std::optional<int> GetKeyCodeForName(const std::string_view key_name)
 {
   for (const auto& it : s_evdev_key_names)
   {
diff --git a/src/duckstation-qt/achievementsettingswidget.cpp b/src/duckstation-qt/achievementsettingswidget.cpp
index eec6cee1f..c2a62bb2b 100644
--- a/src/duckstation-qt/achievementsettingswidget.cpp
+++ b/src/duckstation-qt/achievementsettingswidget.cpp
@@ -57,7 +57,6 @@ AchievementSettingsWidget::~AchievementSettingsWidget() = default;
 void AchievementSettingsWidget::updateEnableState()
 {
   const bool enabled = m_host_interface->GetBoolSettingValue("Cheevos", "Enabled", false);
-  const bool challenge_mode = m_host_interface->GetBoolSettingValue("Cheevos", "ChallengeMode", false);
   m_ui.testMode->setEnabled(enabled);
   m_ui.useFirstDiscFromPlaylist->setEnabled(enabled);
   m_ui.richPresence->setEnabled(enabled);
diff --git a/src/duckstation-qt/qtutils.cpp b/src/duckstation-qt/qtutils.cpp
index 4d014b5b7..94a2922d7 100644
--- a/src/duckstation-qt/qtutils.cpp
+++ b/src/duckstation-qt/qtutils.cpp
@@ -57,7 +57,6 @@ ALWAYS_INLINE_RELEASE static void ResizeColumnsForView(T* view, const std::initi
     header = view->header();
 
   const int min_column_width = header->minimumSectionSize();
-  const int max_column_width = header->maximumSectionSize();
   const int scrollbar_width = ((view->verticalScrollBar() && view->verticalScrollBar()->isVisible()) ||
                                view->verticalScrollBarPolicy() == Qt::ScrollBarAlwaysOn) ?
                                 view->verticalScrollBar()->width() :
diff --git a/src/frontend-common/common_host_interface.cpp b/src/frontend-common/common_host_interface.cpp
index a15186785..744b2d4fb 100644
--- a/src/frontend-common/common_host_interface.cpp
+++ b/src/frontend-common/common_host_interface.cpp
@@ -1098,7 +1098,6 @@ void CommonHostInterface::DrawFPSWindow()
     position_y += text_size.y + spacing;                                                                               \
   } while (0)
 
-  const System::State state = System::GetState();
   if (System::GetState() == System::State::Running)
   {
     const float speed = System::GetEmulationSpeed();
@@ -2015,7 +2014,7 @@ void CommonHostInterface::RegisterGeneralHotkeys()
                  });
 
   RegisterHotkey(StaticString(TRANSLATABLE("Hotkeys", "General")), StaticString("ChangeDisc"),
-                 StaticString(TRANSLATABLE("Hotkeys", "Change Disc")), [this](bool pressed) {
+                 StaticString(TRANSLATABLE("Hotkeys", "Change Disc")), [](bool pressed) {
                    if (pressed && System::IsValid() && System::HasMediaSubImages())
                    {
                      const u32 current = System::GetMediaSubImageIndex();
@@ -2887,7 +2886,6 @@ void CommonHostInterface::LoadSettings(SettingsInterface& si)
   }
 
   const bool input_display_enabled = si.GetBoolValue("Display", "ShowInputs", false);
-  const bool input_display_state = static_cast<bool>(s_input_overlay_ui);
   if (input_display_enabled && !s_input_overlay_ui)
     s_input_overlay_ui = std::make_unique<FrontendCommon::InputOverlayUI>();
   else if (!input_display_enabled && s_input_overlay_ui)
diff --git a/src/frontend-common/fullscreen_ui.cpp b/src/frontend-common/fullscreen_ui.cpp
index b0756aa78..69b99add6 100644
--- a/src/frontend-common/fullscreen_ui.cpp
+++ b/src/frontend-common/fullscreen_ui.cpp
@@ -2988,8 +2988,7 @@ void DrawGameListWindow()
 
   if (BeginFullscreenColumnWindow(0.0f, 450.0f, "game_list_info", ImVec4(0.11f, 0.15f, 0.17f, 1.00f)))
   {
-    const auto* window = ImGui::GetCurrentWindow();
-    const ImVec2 base_pos(window->DC.CursorPos);
+    const ImGuiWindow* window = ImGui::GetCurrentWindow();
 
     ImGui::SetCursorPos(LayoutScale(ImVec2(50.0f, 50.0f)));
     ImGui::Image(selected_entry ? GetGameListCover(selected_entry)->GetHandle() :
@@ -4118,7 +4117,6 @@ void DrawAchievementWindow()
 
   const ImVec4 background(0.13f, 0.13f, 0.13f, alpha);
   const ImVec2 display_size(ImGui::GetIO().DisplaySize);
-  const float window_width = LayoutScale(LAYOUT_SCREEN_WIDTH);
   const float heading_height = LayoutScale(heading_height_unscaled);
 
   if (BeginFullscreenWindow(
@@ -4129,6 +4127,8 @@ void DrawAchievementWindow()
     bool visible, hovered;
     bool pressed = MenuButtonFrame("achievements_heading", false, heading_height_unscaled, &visible, &hovered, &bb.Min,
                                    &bb.Max, 0, alpha);
+    UNREFERENCED_VARIABLE(pressed);
+
     if (visible)
     {
       const float padding = LayoutScale(10.0f);