[*] basic in-house cpp linting (#4039)

- add `#pragma once` to remainder files
- "correcter" defines (ANDROID), see https://groups.google.com/g/android-ndk/c/cf9_f1SLXls
- extra miscelly fixups

Signed-off-by: lizzie <lizzie@eden-emu.dev>

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4039
Reviewed-by: MaranBr <maranbr@eden-emu.dev>
Reviewed-by: crueter <crueter@eden-emu.dev>

53 files changed, 176 insertions, 153 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index e89eb4a999..268965bff1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -306,7 +306,7 @@ if (YUZU_ROOM)
     add_compile_definitions(YUZU_ROOM)
 endif()
 
-if ((ANDROID OR APPLE OR UNIX) AND (NOT PLATFORM_LINUX OR ANDROID) AND NOT WIN32)
+if (UNIX AND NOT (PLATFORM_LINUX OR WIN32))
     if(CXX_APPLE OR CXX_CLANG)
         # libc++ has stop_token and jthread as experimental
         set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fexperimental-library")
@@ -524,6 +524,8 @@ elseif (WIN32)
         # PSAPI is the Process Status API
         set(PLATFORM_LIBRARIES ${PLATFORM_LIBRARIES} psapi imm32 version crypt32 rpcrt4 gdi32 wldap32 mswsock)
     endif()
+elseif (PLATFORM_MANAGARM)
+    set(PLATFORM_LIBRARIES iconv intl)
 elseif (PLATFORM_HAIKU)
     # Haiku is so special :)
     set(PLATFORM_LIBRARIES bsd /boot/system/lib/libnetwork.so)
diff --git a/src/common/cpu_features.cpp b/src/common/cpu_features.cpp
index 2f2fae3a77..2e02c47826 100644
--- a/src/common/cpu_features.cpp
+++ b/src/common/cpu_features.cpp
@@ -303,7 +303,7 @@ namespace {
 }
 [[nodiscard]] s64 GetHostCNTFRQ() noexcept {
     u64 cntfrq_el0 = 0;
-#ifdef ANDROID
+#ifdef __ANDROID__
     std::string_view board{""};
     char buffer[PROP_VALUE_MAX];
     int len{__system_property_get("ro.product.board", buffer)};
diff --git a/src/common/error.cpp b/src/common/error.cpp
index 1b2009db71..070c9a5c7e 100644
--- a/src/common/error.cpp
+++ b/src/common/error.cpp
@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: 2013 Dolphin Emulator Project
 // SPDX-FileCopyrightText: 2014 Citra Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
@@ -30,7 +33,7 @@ std::string NativeErrorToString(int e) {
     return ret;
 #else
     char err_str[255];
-#if defined(ANDROID) ||                                                                            \
+#if defined(__ANDROID__) ||                                                                            \
     (defined(__GLIBC__) && (_GNU_SOURCE || (_POSIX_C_SOURCE < 200112L && _XOPEN_SOURCE < 600)))
     // Thread safe (GNU-specific)
     const char* str = strerror_r(e, err_str, sizeof(err_str));
diff --git a/src/common/fs/file.cpp b/src/common/fs/file.cpp
index 854090e7b2..461a5eee35 100644
--- a/src/common/fs/file.cpp
+++ b/src/common/fs/file.cpp
@@ -9,7 +9,7 @@
 #include "common/assert.h"
 #include "common/fs/file.h"
 #include "common/fs/fs.h"
-#ifdef ANDROID
+#ifdef __ANDROID__
 #include "common/fs/fs_android.h"
 #endif
 #include "common/logging.h"
@@ -259,7 +259,7 @@ void IOFile::Open(const fs::path& path, FileAccessMode mode, FileType type, File
     } else {
         _wfopen_s(&file, path.c_str(), AccessModeToWStr(mode, type));
     }
-#elif ANDROID
+#elif __ANDROID__
     if (Android::IsContentUri(path)) {
         ASSERT_MSG(mode == FileAccessMode::Read, "Content URI file access is for read-only!");
         const auto fd = Android::OpenContentUri(path, Android::OpenMode::Read);
@@ -396,7 +396,7 @@ u64 IOFile::GetSize() const {
     // Flush any unwritten buffered data into the file prior to retrieving the file size.
     std::fflush(file);
 
-#if ANDROID
+#ifdef __ANDROID__
     u64 file_size = 0;
     if (Android::IsContentUri(file_path)) {
         file_size = Android::GetSize(file_path);
diff --git a/src/common/fs/fs.cpp b/src/common/fs/fs.cpp
index 3858b0f0c3..3683105d6e 100644
--- a/src/common/fs/fs.cpp
+++ b/src/common/fs/fs.cpp
@@ -6,7 +6,7 @@
 
 #include "common/fs/file.h"
 #include "common/fs/fs.h"
-#ifdef ANDROID
+#ifdef __ANDROID__
 #include "common/fs/fs_android.h"
 #endif
 #include "common/fs/path_util.h"
@@ -532,7 +532,7 @@ void IterateDirEntriesRecursively(const std::filesystem::path& path,
 
 bool Exists(const fs::path& path) {
     std::error_code ec;
-#ifdef ANDROID
+#ifdef __ANDROID__
     if (Android::IsContentUri(path)) {
         return Android::Exists(path);
     } else {
@@ -545,7 +545,7 @@ bool Exists(const fs::path& path) {
 
 bool IsFile(const fs::path& path) {
     std::error_code ec;
-#ifdef ANDROID
+#ifdef __ANDROID__
     if (Android::IsContentUri(path)) {
         return !Android::IsDirectory(path);
     } else {
@@ -558,7 +558,7 @@ bool IsFile(const fs::path& path) {
 
 bool IsDir(const fs::path& path) {
     std::error_code ec;
-#ifdef ANDROID
+#ifdef __ANDROID__
     if (Android::IsContentUri(path)) {
         return Android::IsDirectory(path);
     } else {
@@ -611,7 +611,7 @@ fs::file_type GetEntryType(const fs::path& path) {
 }
 
 u64 GetSize(const fs::path& path) {
-#ifdef ANDROID
+#ifdef __ANDROID__
     if (Android::IsContentUri(path)) {
         return Android::GetSize(path);
     }
diff --git a/src/common/fs/path_util.cpp b/src/common/fs/path_util.cpp
index 714e393293..93d2300ed1 100644
--- a/src/common/fs/path_util.cpp
+++ b/src/common/fs/path_util.cpp
@@ -11,7 +11,7 @@
 
 #include "common/assert.h"
 #include "common/fs/fs.h"
-#ifdef ANDROID
+#ifdef __ANDROID__
 #include "common/fs/fs_android.h"
 #endif
 #include "common/fs/fs_paths.h"
@@ -126,7 +126,7 @@ public:
         LEGACY_PATH(Yuzu, YUZU)
         LEGACY_PATH(Suyu, SUYU)
 #undef LEGACY_PATH
-#elif ANDROID
+#elif __ANDROID__
         ASSERT(!eden_path.empty());
         eden_path_cache = eden_path / CACHE_DIR;
         eden_path_config = eden_path / CONFIG_DIR;
@@ -447,11 +447,11 @@ std::vector<std::string> SplitPathComponentsCopy(std::string_view filename) {
 
 std::string SanitizePath(std::string_view path_, DirectorySeparator directory_separator) {
     std::string path(path_);
-#ifdef ANDROID
+#ifdef __ANDROID__
     if (Android::IsContentUri(path)) {
         return path;
     }
-#endif // ANDROID
+#endif // __ANDROID__
 
     char type1 = directory_separator == DirectorySeparator::BackwardSlash ? '/' : '\\';
     char type2 = directory_separator == DirectorySeparator::BackwardSlash ? '\\' : '/';
@@ -482,7 +482,7 @@ std::string GetParentPath(std::string_view path) {
         return std::string(path);
     }
 
-#ifdef ANDROID
+#ifdef __ANDROID__
     if (path[0] != '/') {
         std::string path_string{path};
         return FS::Android::GetParentDirectory(path_string);
diff --git a/src/common/logging.cpp b/src/common/logging.cpp
index 68e033b129..ccf509f451 100644
--- a/src/common/logging.cpp
+++ b/src/common/logging.cpp
@@ -320,7 +320,7 @@ struct DebuggerBackend final : public Backend {
     void Flush() noexcept override {}
 };
 #endif
-#ifdef ANDROID
+#ifdef __ANDROID__
 /// @brief Backend that writes to the Android logcat
 struct LogcatBackend : public Backend {
     explicit LogcatBackend() noexcept = default;
@@ -359,7 +359,7 @@ struct Impl {
 #ifdef _WIN32
         lambda(static_cast<Backend&>(debugger_backend));
 #endif
-#ifdef ANDROID
+#ifdef __ANDROID__
         lambda(static_cast<Backend&>(lc_backend));
 #endif
     }
@@ -372,7 +372,7 @@ struct Impl {
 #ifdef _WIN32
     DebuggerBackend debugger_backend{};
 #endif
-#ifdef ANDROID
+#ifdef __ANDROID__
     LogcatBackend lc_backend{};
 #endif
     std::chrono::steady_clock::time_point time_origin{std::chrono::steady_clock::now()};
diff --git a/src/common/settings.h b/src/common/settings.h
index f38e95d5a4..3e14a40a09 100644
--- a/src/common/settings.h
+++ b/src/common/settings.h
@@ -359,7 +359,7 @@ struct Values {
                                                     true,
                                                     true};
     SwitchableSetting<int, true> fsr_sharpening_slider{linkage,
-#ifdef ANDROID
+#ifdef __ANDROID__
                                                        0,
 #else
                                                        25,
@@ -417,7 +417,7 @@ struct Values {
                                          linkage, 0, "bg_blue", Category::Renderer, Specialization::Default, true, true};
 
     SwitchableSetting<GpuAccuracy, true> gpu_accuracy{linkage,
-#ifdef ANDROID
+#ifdef __ANDROID__
                                                       GpuAccuracy::Low,
 #else
                                                       GpuAccuracy::Medium,
@@ -447,7 +447,7 @@ struct Values {
                                                       "nvdec_emulation", Category::RendererAdvanced};
 
     SwitchableSetting<AnisotropyMode, true> max_anisotropy{linkage,
-#ifdef ANDROID
+#ifdef __ANDROID__
                                                            AnisotropyMode::Default,
 #else
                                                            AnisotropyMode::Automatic,
@@ -500,7 +500,7 @@ struct Values {
                                                 Category::RendererAdvanced};
 
     SwitchableSetting<bool> use_reactive_flushing{linkage,
-#ifdef ANDROID
+#ifdef __ANDROID__
                                                   false,
 #else
                                                   true,
@@ -519,7 +519,7 @@ struct Values {
                                                   true,
                                                   true};
 
-#ifdef ANDROID
+#ifdef __ANDROID__
     SwitchableSetting<bool> use_optimized_vertex_buffers{linkage,
                                                  false,
                                                  "use_optimized_vertex_buffers",
@@ -553,7 +553,7 @@ struct Values {
                                         true,
                                         true};
     SwitchableSetting<bool> async_presentation{linkage,
-#ifdef ANDROID
+#ifdef __ANDROID__
                                                false,
 #else
                                                false,
@@ -599,7 +599,7 @@ struct Values {
                                                   Category::RendererHacks};
 
     SwitchableSetting<ExtendedDynamicState> dyna_state{linkage,
-#if defined(ANDROID)
+#if defined(__ANDROID__)
                                            ExtendedDynamicState::Disabled,
 #elif defined(__APPLE__)
                                            ExtendedDynamicState::Disabled,
@@ -618,7 +618,7 @@ struct Values {
                                                 Specialization::Scalar};
 
     SwitchableSetting<bool> vertex_input_dynamic_state{linkage,
-#if defined (ANDROID)
+#ifdef __ANDROID__
                                                        false,
 #else
                                                        true,
@@ -634,7 +634,7 @@ struct Values {
                                                     linkage, false, "disable_shader_loop_safety_checks", Category::RendererDebug};
     Setting<bool> enable_renderdoc_hotkey{linkage, false, "renderdoc_hotkey",
                                           Category::RendererDebug};
-#if defined(ANDROID) && defined(ARCHITECTURE_arm64)
+#if defined(__ANDROID__) && defined(ARCHITECTURE_arm64)
     // Debug override for automatic BCn patching detection
     Setting<bool> patch_old_qcom_drivers{linkage, false, "patch_old_qcom_drivers",
                                          Category::RendererDebug};
@@ -679,7 +679,7 @@ struct Values {
     Setting<s32> current_user{linkage, 0, "current_user", Category::System};
 
     SwitchableSetting<ConsoleMode> use_docked_mode{linkage,
-#ifdef ANDROID
+#ifdef __ANDROID__
                                                    ConsoleMode::Handheld,
 #else
                                                    ConsoleMode::Docked,
diff --git a/src/common/string_util.cpp b/src/common/string_util.cpp
index 7bcbe737b6..9543a62343 100644
--- a/src/common/string_util.cpp
+++ b/src/common/string_util.cpp
@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: 2013 Dolphin Emulator Project
@@ -18,7 +18,7 @@
 #include <windows.h>
 #endif
 
-#ifdef ANDROID
+#ifdef __ANDROID__
 #include <common/fs/fs_android.h>
 #endif
 
@@ -45,7 +45,7 @@ bool SplitPath(const std::string& full_path, std::string* _pPath, std::string* _
     if (full_path.empty())
         return false;
 
-#ifdef ANDROID
+#ifdef __ANDROID__
     if (full_path[0] != '/') {
         *_pPath = Common::FS::Android::GetParentDirectory(full_path);
         *_pFilename = Common::FS::Android::GetFilename(full_path);
diff --git a/src/common/swap.h b/src/common/swap.h
index 1cf8a6ba39..c7646ea24d 100644
--- a/src/common/swap.h
+++ b/src/common/swap.h
@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: 2012 PPSSPP Project
@@ -10,12 +10,10 @@
 
 #pragma once
 
-#if defined(_MSC_VER)
 #include <cstdlib>
-#endif
-#include <bit>
 #include <cstring>
 #include <type_traits>
+#include <bit>
 #include "common/common_types.h"
 
 namespace Common {
diff --git a/src/core/debugger/debugger.cpp b/src/core/debugger/debugger.cpp
index 3f089b7f80..7924ea0d45 100644
--- a/src/core/debugger/debugger.cpp
+++ b/src/core/debugger/debugger.cpp
@@ -9,7 +9,7 @@
 #include <boost/asio.hpp>
 #include <boost/version.hpp>
 
-#if BOOST_VERSION > 108400 && (!defined(_WINDOWS) && !defined(ANDROID)) || defined(YUZU_BOOST_v1)
+#if BOOST_VERSION > 108400 && (!defined(_WINDOWS) && !defined(__ANDROID__)) || defined(YUZU_BOOST_v1)
 #define USE_BOOST_v1
 #endif
 
diff --git a/src/core/file_sys/vfs/vfs_real.cpp b/src/core/file_sys/vfs/vfs_real.cpp
index ff8808af85..887973d305 100644
--- a/src/core/file_sys/vfs/vfs_real.cpp
+++ b/src/core/file_sys/vfs/vfs_real.cpp
@@ -23,7 +23,7 @@
 #define stat _stat64
 #endif
 
-#ifdef ANDROID
+#ifdef __ANDROID__
 #include "common/fs/fs_android.h"
 #endif
 
@@ -288,7 +288,7 @@ RealVfsFile::~RealVfsFile() {
 }
 
 std::string RealVfsFile::GetName() const {
-#ifdef ANDROID
+#ifdef __ANDROID__
     if (path[0] != '/') {
         return FS::Android::GetFilename(path);
     }
diff --git a/src/core/tools/renderdoc.cpp b/src/core/tools/renderdoc.cpp
index 4d91956902..6a6df23432 100644
--- a/src/core/tools/renderdoc.cpp
+++ b/src/core/tools/renderdoc.cpp
@@ -31,7 +31,7 @@ RenderdocAPI::RenderdocAPI() {
 #elif defined(__HAIKU__)
     // no rtld on haiku
 #else
-#ifdef ANDROID
+#ifdef __ANDROID__
     static constexpr const char RENDERDOC_LIB[] = "libVkLayer_GLES_RenderDoc.so";
 #else
     static constexpr const char RENDERDOC_LIB[] = "librenderdoc.so";
diff --git a/src/dynarmic/src/dynarmic/backend/x64/devirtualize.h b/src/dynarmic/src/dynarmic/backend/x64/devirtualize.h
index e6efe010ff..9b618fe71b 100644
--- a/src/dynarmic/src/dynarmic/backend/x64/devirtualize.h
+++ b/src/dynarmic/src/dynarmic/backend/x64/devirtualize.h
@@ -75,7 +75,7 @@ ArgCallback DevirtualizeItanium(mcl::class_type<decltype(mfp)>* this_) {
 
 template<auto mfp>
 ArgCallback Devirtualize(mcl::class_type<decltype(mfp)>* this_) {
-#if defined(__APPLE__) || defined(linux) || defined(__linux) || defined(__linux__)
+#if defined(__APPLE__) || defined(__linux__)
     return DevirtualizeItanium<mfp>(this_);
 #elif defined(__MINGW64__)
     return DevirtualizeItanium<mfp>(this_);
diff --git a/src/frontend_common/config.cpp b/src/frontend_common/config.cpp
index f275727c17..d8ab044b2d 100644
--- a/src/frontend_common/config.cpp
+++ b/src/frontend_common/config.cpp
@@ -1009,7 +1009,7 @@ std::string Config::AdjustOutputString(const std::string& string) {
 
     // Windows requires that two forward slashes are used at the start of a path for unmapped
     // network drives so we have to watch for that here
-#ifndef ANDROID
+#ifndef __ANDROID__
     if (string.substr(0, 2) == "//") {
         boost::replace_all(adjusted_string, "//", "/");
         adjusted_string.insert(0, "/");
diff --git a/src/frontend_common/data_manager.h b/src/frontend_common/data_manager.h
index afb7cb0d2b..b43067d984 100644
--- a/src/frontend_common/data_manager.h
+++ b/src/frontend_common/data_manager.h
@@ -1,8 +1,7 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-#ifndef DATA_MANAGER_H
-#define DATA_MANAGER_H
+#pragma once
 
 #include "common/common_types.h"
 #include <string>
@@ -21,5 +20,3 @@ std::string ReadableBytesSize(u64 size) noexcept;
 u64 DataDirSize(DataDir dir);
 
 }; // namespace FrontendCommon::DataManager
-
-#endif // DATA_MANAGER_H
diff --git a/src/frontend_common/firmware_manager.cpp b/src/frontend_common/firmware_manager.cpp
index 79af202ed8..c7f1177ee2 100644
--- a/src/frontend_common/firmware_manager.cpp
+++ b/src/frontend_common/firmware_manager.cpp
@@ -13,7 +13,7 @@
 #include "core/crypto/key_manager.h"
 #include "frontend_common/content_manager.h"
 
-#ifdef ANDROID
+#ifdef __ANDROID__
 #include <jni.h>
 #include <common/android/id_cache.h>
 #include <common/android/android_common.h>
@@ -25,7 +25,7 @@ FirmwareManager::InstallKeys(std::string location, std::string extension) {
 
     const auto keys_dir = Common::FS::GetEdenPath(Common::FS::EdenPath::KeysDir);
 
-#ifdef ANDROID
+#ifdef __ANDROID__
     JNIEnv *env = Common::Android::GetEnvForThread();
 
     jstring jsrc = Common::Android::ToJString(env, location);
diff --git a/src/frontend_common/firmware_manager.h b/src/frontend_common/firmware_manager.h
index 94469e9295..4c1297431d 100644
--- a/src/frontend_common/firmware_manager.h
+++ b/src/frontend_common/firmware_manager.h
@@ -1,8 +1,7 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-#ifndef FIRMWARE_MANAGER_H
-#define FIRMWARE_MANAGER_H
+#pragma once
 
 #include "common/common_types.h"
 #include "core/core.h"
@@ -107,5 +106,3 @@ inline std::pair<Service::Set::FirmwareVersionFormat, Result> GetFirmwareVersion
 
 // TODO(crueter): GET AS STRING
 }
-
-#endif
diff --git a/src/frontend_common/mod_manager.h b/src/frontend_common/mod_manager.h
index 57fdbc3533..79c9e8ade7 100644
--- a/src/frontend_common/mod_manager.h
+++ b/src/frontend_common/mod_manager.h
@@ -5,6 +5,7 @@
 
 #include <filesystem>
 #include <optional>
+#include <vector>
 #include "common/common_types.h"
 
 namespace FrontendCommon {
diff --git a/src/hid_core/frontend/emulated_controller.cpp b/src/hid_core/frontend/emulated_controller.cpp
index ef841e2411..3ebb9133dd 100644
--- a/src/hid_core/frontend/emulated_controller.cpp
+++ b/src/hid_core/frontend/emulated_controller.cpp
@@ -179,7 +179,7 @@ void EmulatedController::LoadDevices() {
     if (npad_id_type == NpadIdType::Player1 || npad_id_type == NpadIdType::Handheld) {
         camera_params[1] = Common::ParamPackage{"engine:camera,camera:1"};
         nfc_params[0] = Common::ParamPackage{"engine:virtual_amiibo,nfc:1"};
-#ifndef ANDROID
+#ifndef __ANDROID__
         ring_params[1] = Common::ParamPackage{"engine:joycon,axis_x:100,axis_y:101"};
 #else
         android_params = Common::ParamPackage{"engine:android,port:100"};
diff --git a/src/input_common/main.cpp b/src/input_common/main.cpp
index 5f0a8af3aa..6c8443ff62 100644
--- a/src/input_common/main.cpp
+++ b/src/input_common/main.cpp
@@ -30,7 +30,7 @@
 #include "input_common/drivers/sdl_driver.h"
 #endif
 
-#ifdef ANDROID
+#ifdef __ANDROID__
 #include "input_common/drivers/android.h"
 #endif
 
@@ -85,7 +85,7 @@ struct InputSubsystem::Impl {
         RegisterEngine("cemuhookudp", udp_client);
         RegisterEngine("tas", tas_input);
         RegisterEngine("camera", camera);
-#ifdef ANDROID
+#ifdef __ANDROID__
         RegisterEngine("android", android);
 #endif
         RegisterEngine("virtual_amiibo", virtual_amiibo);
@@ -119,7 +119,7 @@ struct InputSubsystem::Impl {
         UnregisterEngine(udp_client);
         UnregisterEngine(tas_input);
         UnregisterEngine(camera);
-#ifdef ANDROID
+#ifdef __ANDROID__
         UnregisterEngine(android);
 #endif
         UnregisterEngine(virtual_amiibo);
@@ -138,13 +138,13 @@ struct InputSubsystem::Impl {
             Common::ParamPackage{{"display", "Any"}, {"engine", "any"}},
         };
 
-#ifndef ANDROID
+#ifndef __ANDROID__
         auto keyboard_devices = keyboard->GetInputDevices();
         devices.insert(devices.end(), keyboard_devices.begin(), keyboard_devices.end());
         auto mouse_devices = mouse->GetInputDevices();
         devices.insert(devices.end(), mouse_devices.begin(), mouse_devices.end());
 #endif
-#ifdef ANDROID
+#ifdef __ANDROID__
         auto android_devices = android->GetInputDevices();
         devices.insert(devices.end(), android_devices.begin(), android_devices.end());
 #endif
@@ -176,7 +176,7 @@ struct InputSubsystem::Impl {
         if (engine == mouse->GetEngineName()) {
             return mouse;
         }
-#ifdef ANDROID
+#ifdef __ANDROID__
         if (engine == android->GetEngineName()) {
             return android;
         }
@@ -261,7 +261,7 @@ struct InputSubsystem::Impl {
         if (engine == mouse->GetEngineName()) {
             return true;
         }
-#ifdef ANDROID
+#ifdef __ANDROID__
         if (engine == android->GetEngineName()) {
             return true;
         }
@@ -294,7 +294,7 @@ struct InputSubsystem::Impl {
     void BeginConfiguration() {
         keyboard->BeginConfiguration();
         mouse->BeginConfiguration();
-#ifdef ANDROID
+#ifdef __ANDROID__
         android->BeginConfiguration();
 #endif
 #ifdef ENABLE_LIBUSB
@@ -310,7 +310,7 @@ struct InputSubsystem::Impl {
     void EndConfiguration() {
         keyboard->EndConfiguration();
         mouse->EndConfiguration();
-#ifdef ANDROID
+#ifdef __ANDROID__
         android->EndConfiguration();
 #endif
 #ifdef ENABLE_LIBUSB
@@ -355,7 +355,7 @@ struct InputSubsystem::Impl {
     std::shared_ptr<Joycons> joycon;
 #endif
 
-#ifdef ANDROID
+#ifdef __ANDROID__
     std::shared_ptr<Android> android;
 #endif
 };
@@ -412,7 +412,7 @@ const Camera* InputSubsystem::GetCamera() const {
     return impl->camera.get();
 }
 
-#ifdef ANDROID
+#ifdef __ANDROID__
 Android* InputSubsystem::GetAndroid() {
     return impl->android.get();
 }
diff --git a/src/qt_common/abstract/frontend.h b/src/qt_common/abstract/frontend.h
index 9b70f6849e..48c7c6edd0 100644
--- a/src/qt_common/abstract/frontend.h
+++ b/src/qt_common/abstract/frontend.h
@@ -1,8 +1,7 @@
 // SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-#ifndef FRONTEND_H
-#define FRONTEND_H
+#pragma once
 
 #include <QGuiApplication>
 #include "qt_common/qt_common.h"
@@ -114,4 +113,3 @@ const QString GetTextInput(const QString& title = QString(), const QString& capt
                            const QString& defaultText = QString());
 
 } // namespace QtCommon::Frontend
-#endif // FRONTEND_H
diff --git a/src/qt_common/qt_common.h b/src/qt_common/qt_common.h
index 2109774506..ea8e3f73a2 100644
--- a/src/qt_common/qt_common.h
+++ b/src/qt_common/qt_common.h
@@ -1,8 +1,7 @@
 // SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-#ifndef QT_COMMON_H
-#define QT_COMMON_H
+#pragma once
 
 #include <memory>
 #include <QWindow>
@@ -62,4 +61,3 @@ const QString tr(const std::string& str);
 
 std::filesystem::path GetEdenCommand();
 } // namespace QtCommon
-#endif
diff --git a/src/qt_common/util/applet.h b/src/qt_common/util/applet.h
index f88aa066b2..41294466da 100644
--- a/src/qt_common/util/applet.h
+++ b/src/qt_common/util/applet.h
@@ -1,9 +1,7 @@
 // SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-#ifndef QT_APPLET_UTIL_H
-#define QT_APPLET_UTIL_H
+#pragma once
 
 // TODO
 namespace QtCommon::Applets {}
-#endif // QT_APPLET_UTIL_H
diff --git a/src/qt_common/util/content.h b/src/qt_common/util/content.h
index 452764ef54..6b0cbb5965 100644
--- a/src/qt_common/util/content.h
+++ b/src/qt_common/util/content.h
@@ -1,8 +1,7 @@
 // SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-#ifndef QT_CONTENT_UTIL_H
-#define QT_CONTENT_UTIL_H
+#pragma once
 
 #include <QObject>
 #include "common/common_types.h"
@@ -63,4 +62,3 @@ void configureFilesystemProvider(const std::string& filepath);
 // Profiles //
 void FixProfiles();
 } // namespace QtCommon::Content
-#endif // QT_CONTENT_UTIL_H
diff --git a/src/qt_common/util/fs.h b/src/qt_common/util/fs.h
index 5ab59e2a45..8f42beaaa3 100644
--- a/src/qt_common/util/fs.h
+++ b/src/qt_common/util/fs.h
@@ -1,12 +1,12 @@
 // SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
+#pragma once
+
 #include <filesystem>
 #include <optional>
 #include "common/common_types.h"
 
-#pragma once
-
 namespace QtCommon::FS {
 
 void LinkRyujinx(std::filesystem::path& from, std::filesystem::path& to);
diff --git a/src/qt_common/util/game.h b/src/qt_common/util/game.h
index 9a61bb9349..8722574ed7 100644
--- a/src/qt_common/util/game.h
+++ b/src/qt_common/util/game.h
@@ -1,8 +1,7 @@
 // SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-#ifndef QT_GAME_UTIL_H
-#define QT_GAME_UTIL_H
+#pragma once
 
 #include <QObject>
 #include <QStandardPaths>
@@ -78,5 +77,3 @@ void CreateHomeMenuShortcut(ShortcutTarget target);
 [[nodiscard]] bool SaveIconToFile(const std::filesystem::path& icon_path, const QImage& image);
 
 } // namespace QtCommon::Game
-
-#endif // QT_GAME_UTIL_H
diff --git a/src/qt_common/util/meta.h b/src/qt_common/util/meta.h
index ae6dbc49d8..d408b5759c 100644
--- a/src/qt_common/util/meta.h
+++ b/src/qt_common/util/meta.h
@@ -1,8 +1,7 @@
 // SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-#ifndef QT_META_H
-#define QT_META_H
+#pragma once
 
 #include <QObject>
 
@@ -12,4 +11,3 @@ namespace QtCommon::Meta {
 void RegisterMetaTypes();
 
 } // namespace QtCommon::Meta
-#endif // QT_META_H
diff --git a/src/qt_common/util/path.h b/src/qt_common/util/path.h
index aff0009f34..ba77625226 100644
--- a/src/qt_common/util/path.h
+++ b/src/qt_common/util/path.h
@@ -1,8 +1,7 @@
 // SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-#ifndef QT_PATH_UTIL_H
-#define QT_PATH_UTIL_H
+#pragma once
 
 #include <QObject>
 #include "common/common_types.h"
@@ -10,5 +9,3 @@
 namespace QtCommon::Path {
 bool OpenShaderCache(u64 program_id, QObject* parent);
 }
-
-#endif // QT_PATH_UTIL_H
diff --git a/src/qt_common/util/rom.h b/src/qt_common/util/rom.h
index 5ceadaf46b..6ea5082082 100644
--- a/src/qt_common/util/rom.h
+++ b/src/qt_common/util/rom.h
@@ -1,16 +1,11 @@
 // SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-#ifndef QT_ROM_UTIL_H
-#define QT_ROM_UTIL_H
+#pragma once
 
 #include <cstddef>
 #include "qt_common/qt_common.h"
 
 namespace QtCommon::ROM {
-
-bool RomFSRawCopy(size_t total_size, size_t& read_size, QtProgressCallback callback,
-                  const FileSys::VirtualDir& src, const FileSys::VirtualDir& dest, bool full);
-
+bool RomFSRawCopy(size_t total_size, size_t& read_size, QtProgressCallback callback, const FileSys::VirtualDir& src, const FileSys::VirtualDir& dest, bool full);
 }
-#endif // QT_ROM_UTIL_H
diff --git a/src/shader_recompiler/backend/spirv/emit_spirv_convert.cpp b/src/shader_recompiler/backend/spirv/emit_spirv_convert.cpp
index 115e9ed4ed..9fa84cceb7 100644
--- a/src/shader_recompiler/backend/spirv/emit_spirv_convert.cpp
+++ b/src/shader_recompiler/backend/spirv/emit_spirv_convert.cpp
@@ -151,7 +151,7 @@ Id EmitConvertU32U64(EmitContext& ctx, Id value) {
 }
 
 Id EmitConvertF16F32(EmitContext& ctx, Id value) {
-#ifdef ANDROID
+#ifdef __ANDROID__
     return ctx.OpFConvert(ctx.F16[1], value);
 #else
     const auto result = ctx.OpFConvert(ctx.F16[1], value);
diff --git a/src/shader_recompiler/backend/spirv/emit_spirv_image.cpp b/src/shader_recompiler/backend/spirv/emit_spirv_image.cpp
index ad98973e29..df4da81356 100644
--- a/src/shader_recompiler/backend/spirv/emit_spirv_image.cpp
+++ b/src/shader_recompiler/backend/spirv/emit_spirv_image.cpp
@@ -506,7 +506,7 @@ Id EmitImageSampleExplicitLod(EmitContext& ctx, IR::Inst* inst, const IR::Value&
     Id result = Emit(&EmitContext::OpImageSparseSampleExplicitLod,
                      &EmitContext::OpImageSampleExplicitLod, ctx, inst, ctx.F32[4],
                      Texture(ctx, info, index), coords, operands.Mask(), operands.Span());
-#ifdef ANDROID
+#ifdef __ANDROID__
     if (Settings::values.fix_bloom_effects.GetValue()) {
         result = ctx.OpVectorTimesScalar(ctx.F32[4], result, ctx.Const(0.98f));
     }
diff --git a/src/video_core/buffer_cache/buffer_cache.h b/src/video_core/buffer_cache/buffer_cache.h
index 8c36a40377..0738eaeec3 100644
--- a/src/video_core/buffer_cache/buffer_cache.h
+++ b/src/video_core/buffer_cache/buffer_cache.h
@@ -801,7 +801,7 @@ void BufferCache<P>::UpdateVertexBufferSlot(u32 index, const Binding& binding) {
 template <class P>
 void BufferCache<P>::BindHostVertexBuffers() {
 
-#ifdef ANDROID
+#ifdef __ANDROID__
     const bool use_optimized_vertex_buffers = Settings::values.use_optimized_vertex_buffers.GetValue();
 #else
     constexpr bool use_optimized_vertex_buffers = true;
diff --git a/src/video_core/gpu_logging/freedreno_debug.cpp b/src/video_core/gpu_logging/freedreno_debug.cpp
index 8b65bd0cd5..e01c154031 100644
--- a/src/video_core/gpu_logging/freedreno_debug.cpp
+++ b/src/video_core/gpu_logging/freedreno_debug.cpp
@@ -1,7 +1,7 @@
 // SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-#ifdef ANDROID
+#ifdef __ANDROID__
 
 #include "video_core/gpu_logging/freedreno_debug.h"
 #include "common/logging.h"
@@ -49,4 +49,4 @@ std::string FreedrenoDebugger::GetBreadcrumbs() {
 
 } // namespace GPU::Logging::Freedreno
 
-#endif // ANDROID
+#endif // __ANDROID__
diff --git a/src/video_core/gpu_logging/freedreno_debug.h b/src/video_core/gpu_logging/freedreno_debug.h
index feb57a0b2a..7e4f812f46 100644
--- a/src/video_core/gpu_logging/freedreno_debug.h
+++ b/src/video_core/gpu_logging/freedreno_debug.h
@@ -3,7 +3,7 @@
 
 #pragma once
 
-#ifdef ANDROID
+#ifdef __ANDROID__
 
 #include <string>
 
@@ -29,4 +29,4 @@ private:
 
 } // namespace GPU::Logging::Freedreno
 
-#endif // ANDROID
+#endif // __ANDROID__
diff --git a/src/video_core/host1x/ffmpeg.cpp b/src/video_core/host1x/ffmpeg.cpp
index 80e48692f7..88df6695d8 100644
--- a/src/video_core/host1x/ffmpeg.cpp
+++ b/src/video_core/host1x/ffmpeg.cpp
@@ -28,7 +28,7 @@ namespace {
 constexpr AVPixelFormat PreferredGpuFormat = AV_PIX_FMT_NV12;
 constexpr AVPixelFormat PreferredCpuFormat = AV_PIX_FMT_YUV420P;
 constexpr std::array PreferredGpuDecoders = {
-#if defined (_WIN32)
+#if defined(_WIN32)
     AV_HWDEVICE_TYPE_CUDA,
     AV_HWDEVICE_TYPE_D3D11VA,
     AV_HWDEVICE_TYPE_DXVA2,
@@ -39,7 +39,7 @@ constexpr std::array PreferredGpuDecoders = {
     AV_HWDEVICE_TYPE_DRM,
 #elif defined(__APPLE__)
     AV_HWDEVICE_TYPE_VIDEOTOOLBOX,
-#elif defined(ANDROID)
+#elif defined(__ANDROID__)
     AV_HWDEVICE_TYPE_MEDIACODEC,
 #elif defined(__unix__)
     AV_HWDEVICE_TYPE_CUDA,
diff --git a/src/video_core/renderer_vulkan/vk_pipeline_cache.cpp b/src/video_core/renderer_vulkan/vk_pipeline_cache.cpp
index 5345bdc306..23bfbceccb 100644
--- a/src/video_core/renderer_vulkan/vk_pipeline_cache.cpp
+++ b/src/video_core/renderer_vulkan/vk_pipeline_cache.cpp
@@ -45,7 +45,7 @@
 #include "video_core/vulkan_common/vulkan_wrapper.h"
 #include "video_core/gpu_logging/gpu_logging.h"
 
-#ifdef ANDROID
+#ifdef __ANDROID__
 #include "../../android/app/src/main/jni/android_settings.h"
 #endif
 
@@ -328,7 +328,7 @@ Shader::RuntimeInfo MakeRuntimeInfo(std::span<const Shader::IR::Program> program
 size_t GetTotalPipelineWorkers() {
     const size_t max_core_threads =
         std::max<size_t>(static_cast<size_t>(std::thread::hardware_concurrency()), 2ULL) - 1ULL;
-#ifdef ANDROID
+#ifdef __ANDROID__
     const int configured = AndroidSettings::values.pipeline_worker_count.GetValue();
     const int clamped = std::clamp(configured, 4, 8);
     const size_t desired = static_cast<size_t>(clamped);
diff --git a/src/video_core/renderer_vulkan/vk_present_manager.cpp b/src/video_core/renderer_vulkan/vk_present_manager.cpp
index 010bc9b7d4..53c3f6759f 100644
--- a/src/video_core/renderer_vulkan/vk_present_manager.cpp
+++ b/src/video_core/renderer_vulkan/vk_present_manager.cpp
@@ -309,7 +309,7 @@ void PresentManager::CopyToSwapchain(Frame* frame) {
         try {
             // Recreate surface and swapchain if needed.
             if (requires_recreation) {
-#ifdef ANDROID
+#ifdef __ANDROID__
                 surface = CreateSurface(instance, render_window.GetWindowInfo());
 #endif
                 RecreateSwapchain(frame);
diff --git a/src/video_core/renderer_vulkan/vk_rasterizer.cpp b/src/video_core/renderer_vulkan/vk_rasterizer.cpp
index 4af78c4ac6..35b7aed552 100644
--- a/src/video_core/renderer_vulkan/vk_rasterizer.cpp
+++ b/src/video_core/renderer_vulkan/vk_rasterizer.cpp
@@ -928,13 +928,13 @@ void RasterizerVulkan::LoadDiskResources(u64 title_id, std::stop_token stop_load
 }
 
 void RasterizerVulkan::FlushWork() {
-#ifdef ANDROID
+#ifdef __ANDROID__
     static constexpr u32 DRAWS_TO_DISPATCH = 512;
     static constexpr u32 CHECK_MASK = 3;
 #else
     static constexpr u32 DRAWS_TO_DISPATCH = 4096;
     static constexpr u32 CHECK_MASK = 7;
-#endif // ANDROID
+#endif // __ANDROID__
 
     static_assert(DRAWS_TO_DISPATCH % (CHECK_MASK + 1) == 0);
     if ((++draw_counter & CHECK_MASK) != CHECK_MASK) {
diff --git a/src/video_core/renderer_vulkan/vk_swapchain.cpp b/src/video_core/renderer_vulkan/vk_swapchain.cpp
index 7e31f9cf67..fdbad16721 100644
--- a/src/video_core/renderer_vulkan/vk_swapchain.cpp
+++ b/src/video_core/renderer_vulkan/vk_swapchain.cpp
@@ -288,7 +288,7 @@ void Swapchain::CreateSwapchain(const VkSurfaceCapabilitiesKHR& capabilities) {
         .imageSharingMode = VK_SHARING_MODE_EXCLUSIVE,
         .queueFamilyIndexCount = 0,
         .pQueueFamilyIndices = nullptr,
-#ifdef ANDROID
+#ifdef __ANDROID__
         // On Android, do not allow surface rotation to deviate from the frontend.
         .preTransform = VK_SURFACE_TRANSFORM_IDENTITY_BIT_KHR,
 #else
@@ -313,7 +313,7 @@ void Swapchain::CreateSwapchain(const VkSurfaceCapabilitiesKHR& capabilities) {
         swapchain_ci.imageFormat,  // Base format MUST be first
         VK_FORMAT_B8G8R8A8_UNORM,
         VK_FORMAT_B8G8R8A8_SRGB,
-#ifdef ANDROID
+#ifdef __ANDROID__
         VK_FORMAT_R8G8B8A8_UNORM,  // Android may use RGBA
         VK_FORMAT_R8G8B8A8_SRGB,
 #endif
@@ -338,7 +338,7 @@ void Swapchain::CreateSwapchain(const VkSurfaceCapabilitiesKHR& capabilities) {
 
     images = swapchain.GetImages();
     image_count = static_cast<u32>(images.size());
-#ifdef ANDROID
+#ifdef __ANDROID__
     // Android is already ordered the same as Switch.
     image_view_format = VK_FORMAT_R8G8B8A8_UNORM;
 #else
diff --git a/src/video_core/renderer_vulkan/vk_turbo_mode.cpp b/src/video_core/renderer_vulkan/vk_turbo_mode.cpp
index 54183be12c..095908b6cf 100644
--- a/src/video_core/renderer_vulkan/vk_turbo_mode.cpp
+++ b/src/video_core/renderer_vulkan/vk_turbo_mode.cpp
@@ -1,10 +1,10 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
-#if defined(ANDROID) && defined(ARCHITECTURE_arm64)
+#if defined(__ANDROID__) && defined(ARCHITECTURE_arm64)
 #include <adrenotools/driver.h>
 #endif
 
@@ -20,7 +20,7 @@ namespace Vulkan {
 using namespace Common::Literals;
 
 TurboMode::TurboMode(const vk::Instance& instance, const vk::InstanceDispatch& dld)
-#ifndef ANDROID
+#ifndef __ANDROID__
     : m_device{CreateDevice(instance, dld, VK_NULL_HANDLE)}, m_allocator{m_device}
 #endif
 {
@@ -40,7 +40,7 @@ void TurboMode::QueueSubmitted() {
 }
 
 void TurboMode::Run(std::stop_token stop_token) {
-#ifndef ANDROID
+#ifndef __ANDROID__
     auto& dld = m_device.GetLogical();
 
     // Allocate buffer. 2MiB should be sufficient.
@@ -154,7 +154,7 @@ void TurboMode::Run(std::stop_token stop_token) {
 #endif
 
     while (!stop_token.stop_requested()) {
-#ifdef ANDROID
+#ifdef __ANDROID__
 #ifdef ARCHITECTURE_arm64
         adrenotools_set_turbo(true);
 #endif
@@ -232,7 +232,7 @@ void TurboMode::Run(std::stop_token stop_token) {
                    std::chrono::milliseconds{100};
         });
     }
-#if defined(ANDROID) && defined(ARCHITECTURE_arm64)
+#if defined(__ANDROID__) && defined(ARCHITECTURE_arm64)
     adrenotools_set_turbo(false);
 #endif
 }
diff --git a/src/video_core/renderer_vulkan/vk_turbo_mode.h b/src/video_core/renderer_vulkan/vk_turbo_mode.h
index 9341c98671..6f95cf5e74 100644
--- a/src/video_core/renderer_vulkan/vk_turbo_mode.h
+++ b/src/video_core/renderer_vulkan/vk_turbo_mode.h
@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -23,7 +26,7 @@ public:
 private:
     void Run(std::stop_token stop_token);
 
-#ifndef ANDROID
+#ifndef __ANDROID__
     Device m_device;
     MemoryAllocator m_allocator;
 #endif
diff --git a/src/video_core/smaa_area_tex.h b/src/video_core/smaa_area_tex.h
index 40d0941c26..aa4000d315 100644
--- a/src/video_core/smaa_area_tex.h
+++ b/src/video_core/smaa_area_tex.h
@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: 2013 Jorge Jimenez (jorge@iryoku.com)
 // SPDX-FileCopyrightText: 2013 Jose I. Echevarria (joseignacioechevarria@gmail.com)
 // SPDX-FileCopyrightText: 2013 Belen Masia (bmasia@unizar.es)
@@ -5,8 +8,7 @@
 // SPDX-FileCopyrightText: 2013 Diego Gutierrez (diegog@unizar.es)
 // SPDX-License-Identifier: MIT
 
-#ifndef AREATEX_H
-#define AREATEX_H
+#pragma once
 
 #define AREATEX_WIDTH 160
 #define AREATEX_HEIGHT 560
@@ -11219,5 +11221,3 @@ static const unsigned char areaTexBytes[] = {
     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
-
-#endif
diff --git a/src/video_core/smaa_search_tex.h b/src/video_core/smaa_search_tex.h
index 61939e2046..3a74ab0a32 100644
--- a/src/video_core/smaa_search_tex.h
+++ b/src/video_core/smaa_search_tex.h
@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: 2013 Jorge Jimenez (jorge@iryoku.com)
 // SPDX-FileCopyrightText: 2013 Jose I. Echevarria (joseignacioechevarria@gmail.com)
 // SPDX-FileCopyrightText: 2013 Belen Masia (bmasia@unizar.es)
@@ -5,8 +8,7 @@
 // SPDX-FileCopyrightText: 2013 Diego Gutierrez (diegog@unizar.es)
 // SPDX-License-Identifier: MIT
 
-#ifndef SEARCHTEX_H
-#define SEARCHTEX_H
+#pragma once
 
 #define SEARCHTEX_WIDTH 64
 #define SEARCHTEX_HEIGHT 16
@@ -84,5 +86,3 @@ static const unsigned char searchTexBytes[] = {
     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
     0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 };
-
-#endif
diff --git a/src/video_core/vulkan_common/vulkan_debug_callback.cpp b/src/video_core/vulkan_common/vulkan_debug_callback.cpp
index d1bd009c8f..8d59a74a30 100644
--- a/src/video_core/vulkan_common/vulkan_debug_callback.cpp
+++ b/src/video_core/vulkan_common/vulkan_debug_callback.cpp
@@ -27,7 +27,7 @@ VkBool32 DebugUtilCallback(VkDebugUtilsMessageSeverityFlagBitsEXT severity,
                            [[maybe_unused]] void* user_data) {
     // Skip logging known false-positive validation errors
     switch (static_cast<u32>(data->messageIdNumber)) {
-#ifdef ANDROID
+#ifdef __ANDROID__
     case 0xbf9cf353u: // VUID-vkCmdBindVertexBuffers2-pBuffers-04111
     // The below are due to incorrect reporting of extendedDynamicState
     case 0x1093bebbu: // VUID-vkCmdSetCullMode-None-03384
diff --git a/src/video_core/vulkan_common/vulkan_device.cpp b/src/video_core/vulkan_common/vulkan_device.cpp
index 59985067db..bb80895b97 100644
--- a/src/video_core/vulkan_common/vulkan_device.cpp
+++ b/src/video_core/vulkan_common/vulkan_device.cpp
@@ -26,7 +26,7 @@
 #include "video_core/vulkan_common/vulkan_wrapper.h"
 #include "video_core/gpu_logging/gpu_logging.h"
 
-#if defined(ANDROID) && defined(ARCHITECTURE_arm64)
+#if defined(__ANDROID__) && defined(ARCHITECTURE_arm64)
 #include <adrenotools/bcenabler.h>
 #include <android/api-level.h>
 #endif
@@ -294,7 +294,7 @@ ankerl::unordered_dense::map<VkFormat, VkFormatProperties> GetFormatProperties(v
     return format_properties;
 }
 
-#if defined(ANDROID) && defined(ARCHITECTURE_arm64)
+#if defined(__ANDROID__) && defined(ARCHITECTURE_arm64)
 void OverrideBcnFormats(ankerl::unordered_dense::map<VkFormat, VkFormatProperties>& format_properties) {
     // These properties are extracted from Adreno driver 512.687.0
     constexpr VkFormatFeatureFlags tiling_features{VK_FORMAT_FEATURE_SAMPLED_IMAGE_BIT |
@@ -504,7 +504,7 @@ Device::Device(VkInstance instance_, vk::PhysicalDevice physical_, VkSurfaceKHR
         features.shader_atomic_int64.shaderSharedInt64Atomics = false;
         features.features.shaderInt64 = false;
 
-#if defined(ANDROID) && defined(ARCHITECTURE_arm64)
+#if defined(__ANDROID__) && defined(ARCHITECTURE_arm64)
         // BCn patching only safe on Android 9+ (API 28+). Older versions crash on driver load.
         const auto major = (properties.properties.driverVersion >> 24) << 2;
         const auto minor = (properties.properties.driverVersion >> 12) & 0xFFFU;
diff --git a/src/video_core/vulkan_common/vulkan_library.cpp b/src/video_core/vulkan_common/vulkan_library.cpp
index 271b622e65..d174a9d3c8 100644
--- a/src/video_core/vulkan_common/vulkan_library.cpp
+++ b/src/video_core/vulkan_common/vulkan_library.cpp
@@ -16,7 +16,7 @@ namespace Vulkan {
 std::shared_ptr<Common::DynamicLibrary> OpenLibrary(
     [[maybe_unused]] Core::Frontend::GraphicsContext* context) {
     LOG_DEBUG(Render_Vulkan, "Looking for a Vulkan library");
-#if defined(ANDROID) && defined(ARCHITECTURE_arm64)
+#if defined(__ANDROID__) && defined(ARCHITECTURE_arm64)
     // Android manages its Vulkan driver from the frontend.
     return context->GetDriverLibrary();
 #else
diff --git a/src/video_core/vulkan_common/vulkan_wrapper.h b/src/video_core/vulkan_common/vulkan_wrapper.h
index 860cdff20e..87870893c5 100644
--- a/src/video_core/vulkan_common/vulkan_wrapper.h
+++ b/src/video_core/vulkan_common/vulkan_wrapper.h
@@ -453,7 +453,7 @@ public:
         return handle != Type{};
     }
 
-#ifndef ANDROID
+#ifndef __ANDROID__
     /**
      * Releases ownership of the managed handle.
      * The caller is responsible for managing the lifetime of the returned handle.
@@ -535,7 +535,7 @@ public:
         return handle != Type{};
     }
 
-#ifndef ANDROID
+#ifndef __ANDROID__
     /**
      * Releases ownership of the managed handle.
      * The caller is responsible for managing the lifetime of the returned handle.
diff --git a/src/yuzu/data_dialog.h b/src/yuzu/data_dialog.h
index 2915f00848..b780debdff 100644
--- a/src/yuzu/data_dialog.h
+++ b/src/yuzu/data_dialog.h
@@ -1,8 +1,7 @@
 // SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-#ifndef DATA_DIALOG_H
-#define DATA_DIALOG_H
+#pragma once
 
 #include <QDialog>
 #include "frontend_common/data_manager.h"
@@ -47,5 +46,3 @@ private:
 
     std::optional<std::string> selectProfile();
 };
-
-#endif // DATA_DIALOG_H
diff --git a/src/yuzu/migration_dialog.h b/src/yuzu/migration_dialog.h
index a2a2c80358..1cd0f75760 100644
--- a/src/yuzu/migration_dialog.h
+++ b/src/yuzu/migration_dialog.h
@@ -1,8 +1,7 @@
 // SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-#ifndef MIGRATION_DIALOG_H
-#define MIGRATION_DIALOG_H
+#pragma once
 
 #include <QHBoxLayout>
 #include <QMessageBox>
@@ -29,5 +28,3 @@ private:
 
     QAbstractButton* m_clickedButton;
 };
-
-#endif // MIGRATION_DIALOG_H
diff --git a/src/yuzu/migration_worker.h b/src/yuzu/migration_worker.h
index 42abedb9c8..0a8a5b8275 100644
--- a/src/yuzu/migration_worker.h
+++ b/src/yuzu/migration_worker.h
@@ -1,8 +1,7 @@
 // SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-#ifndef MIGRATION_WORKER_H
-#define MIGRATION_WORKER_H
+#pragma once
 
 #include <QObject>
 #include "common/fs/path_util.h"
@@ -73,5 +72,3 @@ private:
     MigrationStrategy strategy;
     QString success_text = tr("Data was migrated successfully.");
 };
-
-#endif // MIGRATION_WORKER_H
diff --git a/src/yuzu/ryujinx_dialog.h b/src/yuzu/ryujinx_dialog.h
index c067499cc1..e668cf5ca0 100644
--- a/src/yuzu/ryujinx_dialog.h
+++ b/src/yuzu/ryujinx_dialog.h
@@ -1,8 +1,7 @@
 // SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
-#ifndef RYUJINX_DIALOG_H
-#define RYUJINX_DIALOG_H
+#pragma once
 
 #include <filesystem>
 #include <QDialog>
@@ -28,5 +27,3 @@ private:
     std::filesystem::path m_eden;
     std::filesystem::path m_ryu;
 };
-
-#endif // RYUJINX_DIALOG_H
diff --git a/tools/cpp-lint.sh b/tools/cpp-lint.sh
new file mode 100755
index 0000000000..4c5a6e10dc
--- /dev/null
+++ b/tools/cpp-lint.sh
@@ -0,0 +1,55 @@
+#!/bin/sh -ex
+
+# SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+# tools/../
+ROOTDIR=$(CDPATH='' cd -- "$(dirname -- "$0")/../" && pwd)
+BUILD_DIR="$ROOTDIR"/build
+SRC_DIR="$ROOTDIR"/src
+
+die() {
+    echo "-- $*" >&2
+    exit 1
+}
+
+usage() {
+    cat <<EOF
+Usage: $0 [command]
+
+Dumb script that serves as a ad-hoc cpp-linter
+
+Commands:
+    once    Check for #pragma once prescence in header files
+	osdef	Finds OS defines that are not recommended to use.
+	inchk   Check includes being valid/toolchain not being stupid
+EOF
+}
+
+while :; do
+	case "$1" in
+	once)
+        find "$SRC_DIR" -type f -name "*.h" -exec grep -L "#pragma once" {} +
+		break
+		;;
+	osdef)
+		# not recommended macros
+		PATTERN="ANDROID\|_WIN64\|__linux\|__unix\|APPLE\|__APPLE"
+		strings=("ANDROID" "_WIN64" "__linux" "__unix" "APPLE" "__APPLE" "linux" "unix")
+		for item in "${strings[@]}"; do
+			PATTERN="$PATTERN\|ifdef $item\|($item)"
+		done
+		# if statements for macros that shouldn't be if
+		strings=("_WIN32" "_AIX" "__managarm__" "__unix__" "__linux__" "__FreeBSD__" "__NetBSD__" \
+			"__OpenBSD__" "__DragonFly__" "__redox__" "__HAIKU__" "__OHOS__" "__FIREOS__")
+		for item in "${strings[@]}"; do
+			PATTERN="$PATTERN\|if $item"
+		done
+        find "$SRC_DIR" -type f -name "*.h" -exec grep -nw "$PATTERN" {} + || echo
+		break
+		;;
+	*) usage ;;
+	esac
+
+	shift
+done