From ccb50e7f2c5d256d88564ecbca1c4c90e7f99cfb Mon Sep 17 00:00:00 2001
From: Tobias <thm.frey@gmail.com>
Date: Sat, 17 Dec 2022 16:06:38 +0100
Subject: [PATCH] Port yuzu-emu/yuzu#9300: "CMake: Use precompiled headers to
 improve compile times" (#6213)

Co-authored-by: Ameer J <52414509+ameerj@users.noreply.github.com>
---
 CMakeLists.txt                           | 19 +++++++++++++++++++
 src/CMakeLists.txt                       | 11 ++++++-----
 src/audio_core/CMakeLists.txt            |  5 +++++
 src/audio_core/precompiled_headers.h     |  7 +++++++
 src/citra/CMakeLists.txt                 |  5 +++++
 src/citra/precompiled_headers.h          |  7 +++++++
 src/citra_qt/CMakeLists.txt              |  5 +++++
 src/citra_qt/precompiled_headers.h       |  7 +++++++
 src/common/CMakeLists.txt                |  6 ++++++
 src/common/common_precompiled_headers.h  | 15 +++++++++++++++
 src/common/precompiled_headers.h         |  7 +++++++
 src/core/CMakeLists.txt                  |  5 +++++
 src/core/precompiled_headers.h           |  7 +++++++
 src/dedicated_room/CMakeLists.txt        |  5 +++++
 src/dedicated_room/precompiled_headers.h |  7 +++++++
 src/input_common/CMakeLists.txt          |  5 +++++
 src/input_common/precompiled_headers.h   |  7 +++++++
 src/network/CMakeLists.txt               |  5 +++++
 src/network/precompiled_headers.h        |  7 +++++++
 src/tests/CMakeLists.txt                 |  5 +++++
 src/tests/precompiled_headers.h          |  7 +++++++
 src/video_core/CMakeLists.txt            |  5 +++++
 src/video_core/precompiled_headers.h     |  7 +++++++
 src/web_service/CMakeLists.txt           |  5 +++++
 src/web_service/precompiled_headers.h    |  7 +++++++
 25 files changed, 173 insertions(+), 5 deletions(-)
 create mode 100644 src/audio_core/precompiled_headers.h
 create mode 100644 src/citra/precompiled_headers.h
 create mode 100644 src/citra_qt/precompiled_headers.h
 create mode 100644 src/common/common_precompiled_headers.h
 create mode 100644 src/common/precompiled_headers.h
 create mode 100644 src/core/precompiled_headers.h
 create mode 100644 src/dedicated_room/precompiled_headers.h
 create mode 100644 src/input_common/precompiled_headers.h
 create mode 100644 src/network/precompiled_headers.h
 create mode 100644 src/tests/precompiled_headers.h
 create mode 100644 src/video_core/precompiled_headers.h
 create mode 100644 src/web_service/precompiled_headers.h

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 710f3fcfb..9d98b74fa 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -42,6 +42,8 @@ CMAKE_DEPENDENT_OPTION(CITRA_USE_BUNDLED_FFMPEG "Download bundled FFmpeg binarie
 
 option(USE_DISCORD_PRESENCE "Enables Discord Rich Presence" OFF)
 
+option(CITRA_USE_PRECOMPILED_HEADERS "Use precompiled headers" ON)
+
 CMAKE_DEPENDENT_OPTION(ENABLE_MF "Use Media Foundation decoder (preferred over FFmpeg)" ON "WIN32" OFF)
 
 CMAKE_DEPENDENT_OPTION(COMPILE_WITH_DWARF "Add DWARF debugging information" ON "MINGW" OFF)
@@ -50,6 +52,23 @@ option(USE_SYSTEM_BOOST "Use the system Boost libs (instead of the bundled ones)
 
 CMAKE_DEPENDENT_OPTION(ENABLE_FDK "Use FDK AAC decoder" OFF "NOT ENABLE_FFMPEG_AUDIO_DECODER;NOT ENABLE_MF" OFF)
 
+if (CITRA_USE_PRECOMPILED_HEADERS)
+    if (MSVC AND CCACHE)
+        # buildcache does not properly cache PCH files, leading to compilation errors.
+        # See https://github.com/mbitsnbites/buildcache/discussions/230
+        message(WARNING "Buildcache does not properly support Precompiled Headers. Disabling PCH")
+        set(CITRA_USE_PRECOMPILED_HEADERS OFF)
+    endif()
+    if(APPLE)
+        message(WARNING "Precompiled Headers currently do not work on Apple. Disabling PCH")
+        set(CITRA_USE_PRECOMPILED_HEADERS OFF)
+    endif()
+endif()
+if (CITRA_USE_PRECOMPILED_HEADERS)
+    message(STATUS "Using Precompiled Headers.")
+    set(CMAKE_PCH_INSTANTIATE_TEMPLATES ON)
+endif()
+
 if(NOT EXISTS ${PROJECT_SOURCE_DIR}/.git/hooks/pre-commit)
     message(STATUS "Copying pre-commit hook")
     file(COPY hooks/pre-commit
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 488f92fae..f59607d66 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -60,6 +60,7 @@ if (MSVC)
     else()
         add_compile_options(
             /MP
+            /Zo
             /permissive-
             /EHsc
             /volatile:iso
@@ -88,11 +89,11 @@ if (MSVC)
 
     # Since MSVC's debugging information is not very deterministic, so we have to disable it
     # when using ccache or other caching tools
-    if (NOT CITRA_USE_CCACHE)
-        add_compile_options(
-            /Zi
-            /Zo
-        )
+    if (CITRA_USE_CCACHE OR CITRA_USE_PRECOMPILED_HEADERS)
+    # Precompiled headers are deleted if not using /Z7. See https://github.com/nanoant/CMakePCHCompiler/issues/21
+        add_compile_options(/Z7)
+    else()
+        add_compile_options(/Zi)
     endif()
 
     # /GS- - No stack buffer overflow checks
diff --git a/src/audio_core/CMakeLists.txt b/src/audio_core/CMakeLists.txt
index 54af4bf61..d8ebd37f0 100644
--- a/src/audio_core/CMakeLists.txt
+++ b/src/audio_core/CMakeLists.txt
@@ -23,6 +23,7 @@ add_library(audio_core STATIC
     interpolate.cpp
     interpolate.h
     null_sink.h
+    precompiled_headers.h
     sink.h
     sink_details.cpp
     sink_details.h
@@ -89,3 +90,7 @@ if(ENABLE_CUBEB)
     target_link_libraries(audio_core PRIVATE cubeb)
     target_compile_definitions(audio_core PUBLIC HAVE_CUBEB)
 endif()
+
+if (CITRA_USE_PRECOMPILED_HEADERS)
+    target_precompile_headers(audio_core PRIVATE precompiled_headers.h)
+endif()
diff --git a/src/audio_core/precompiled_headers.h b/src/audio_core/precompiled_headers.h
new file mode 100644
index 000000000..ffbb5e177
--- /dev/null
+++ b/src/audio_core/precompiled_headers.h
@@ -0,0 +1,7 @@
+// Copyright 2022 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_precompiled_headers.h"
diff --git a/src/citra/CMakeLists.txt b/src/citra/CMakeLists.txt
index f5ef660ca..affbec3f8 100644
--- a/src/citra/CMakeLists.txt
+++ b/src/citra/CMakeLists.txt
@@ -10,6 +10,7 @@ add_executable(citra
     emu_window/emu_window_sdl2.h
     lodepng_image_interface.cpp
     lodepng_image_interface.h
+    precompiled_headers.h
     resource.h
 )
 
@@ -30,3 +31,7 @@ if (MSVC)
     include(CopyCitraSDLDeps)
     copy_citra_SDL_deps(citra)
 endif()
+
+if (CITRA_USE_PRECOMPILED_HEADERS)
+    target_precompile_headers(citra PRIVATE precompiled_headers.h)
+endif()
diff --git a/src/citra/precompiled_headers.h b/src/citra/precompiled_headers.h
new file mode 100644
index 000000000..ffbb5e177
--- /dev/null
+++ b/src/citra/precompiled_headers.h
@@ -0,0 +1,7 @@
+// Copyright 2022 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_precompiled_headers.h"
diff --git a/src/citra_qt/CMakeLists.txt b/src/citra_qt/CMakeLists.txt
index 29f8292d8..b95d6998a 100644
--- a/src/citra_qt/CMakeLists.txt
+++ b/src/citra_qt/CMakeLists.txt
@@ -164,6 +164,7 @@ add_executable(citra-qt
     multiplayer/state.cpp
     multiplayer/state.h
     multiplayer/validation.h
+    precompiled_headers.h
     uisettings.cpp
     uisettings.h
     qt_image_interface.cpp
@@ -319,3 +320,7 @@ if (MSVC)
         copy_citra_FFmpeg_deps(citra-qt)
     endif()
 endif()
+
+if (CITRA_USE_PRECOMPILED_HEADERS)
+    target_precompile_headers(citra-qt PRIVATE precompiled_headers.h)
+endif()
diff --git a/src/citra_qt/precompiled_headers.h b/src/citra_qt/precompiled_headers.h
new file mode 100644
index 000000000..ffbb5e177
--- /dev/null
+++ b/src/citra_qt/precompiled_headers.h
@@ -0,0 +1,7 @@
+// Copyright 2022 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_precompiled_headers.h"
diff --git a/src/common/CMakeLists.txt b/src/common/CMakeLists.txt
index 52eac11b9..0cdb362fe 100644
--- a/src/common/CMakeLists.txt
+++ b/src/common/CMakeLists.txt
@@ -68,6 +68,7 @@ add_library(common STATIC
     color.h
     common_funcs.h
     common_paths.h
+    common_precompiled_headers.h
     common_types.h
     construct.h
     file_util.cpp
@@ -94,6 +95,7 @@ add_library(common STATIC
     misc.cpp
     param_package.cpp
     param_package.h
+    precompiled_headers.h
     quaternion.h
     ring_buffer.h
     scm_rev.cpp
@@ -152,3 +154,7 @@ set_target_properties(common PROPERTIES INTERPROCEDURAL_OPTIMIZATION ${ENABLE_LT
 if (ARCHITECTURE_x86_64)
     target_link_libraries(common PRIVATE xbyak)
 endif()
+
+if (CITRA_USE_PRECOMPILED_HEADERS)
+    target_precompile_headers(common PRIVATE precompiled_headers.h)
+endif()
diff --git a/src/common/common_precompiled_headers.h b/src/common/common_precompiled_headers.h
new file mode 100644
index 000000000..088ad512e
--- /dev/null
+++ b/src/common/common_precompiled_headers.h
@@ -0,0 +1,15 @@
+// Copyright 2022 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <algorithm>
+#include <array>
+#include <chrono>
+#include <memory>
+
+#include <fmt/format.h>
+
+#include "common/assert.h"
+#include "common/common_types.h"
diff --git a/src/common/precompiled_headers.h b/src/common/precompiled_headers.h
new file mode 100644
index 000000000..ffbb5e177
--- /dev/null
+++ b/src/common/precompiled_headers.h
@@ -0,0 +1,7 @@
+// Copyright 2022 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_precompiled_headers.h"
diff --git a/src/core/CMakeLists.txt b/src/core/CMakeLists.txt
index 3575b048e..ddf905577 100644
--- a/src/core/CMakeLists.txt
+++ b/src/core/CMakeLists.txt
@@ -449,6 +449,7 @@ add_library(core STATIC
     movie.h
     perf_stats.cpp
     perf_stats.h
+    precompiled_headers.h
     rpc/packet.cpp
     rpc/packet.h
     rpc/rpc_server.cpp
@@ -504,3 +505,7 @@ endif()
 if (ENABLE_FFMPEG_VIDEO_DUMPER)
     target_link_libraries(core PUBLIC FFmpeg::avcodec FFmpeg::avformat FFmpeg::swscale FFmpeg::swresample FFmpeg::avutil)
 endif()
+
+if (CITRA_USE_PRECOMPILED_HEADERS)
+    target_precompile_headers(core PRIVATE precompiled_headers.h)
+endif()
diff --git a/src/core/precompiled_headers.h b/src/core/precompiled_headers.h
new file mode 100644
index 000000000..ffbb5e177
--- /dev/null
+++ b/src/core/precompiled_headers.h
@@ -0,0 +1,7 @@
+// Copyright 2022 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_precompiled_headers.h"
diff --git a/src/dedicated_room/CMakeLists.txt b/src/dedicated_room/CMakeLists.txt
index 9dbb6784c..480c61bd9 100644
--- a/src/dedicated_room/CMakeLists.txt
+++ b/src/dedicated_room/CMakeLists.txt
@@ -1,6 +1,7 @@
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${PROJECT_SOURCE_DIR}/CMakeModules)
 
 add_executable(citra-room
+    precompiled_headers.h
     citra-room.cpp
     citra-room.rc
 )
@@ -22,3 +23,7 @@ target_link_libraries(citra-room PRIVATE ${PLATFORM_LIBRARIES} Threads::Threads)
 if(UNIX AND NOT APPLE)
     install(TARGETS citra-room RUNTIME DESTINATION "${CMAKE_INSTALL_PREFIX}/bin")
 endif()
+
+if (CITRA_USE_PRECOMPILED_HEADERS)
+    target_precompile_headers(citra-room PRIVATE precompiled_headers.h)
+endif()
diff --git a/src/dedicated_room/precompiled_headers.h b/src/dedicated_room/precompiled_headers.h
new file mode 100644
index 000000000..ffbb5e177
--- /dev/null
+++ b/src/dedicated_room/precompiled_headers.h
@@ -0,0 +1,7 @@
+// Copyright 2022 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_precompiled_headers.h"
diff --git a/src/input_common/CMakeLists.txt b/src/input_common/CMakeLists.txt
index 5c4ef7512..d03284a23 100644
--- a/src/input_common/CMakeLists.txt
+++ b/src/input_common/CMakeLists.txt
@@ -11,6 +11,7 @@ add_library(input_common STATIC
     main.h
     motion_emu.cpp
     motion_emu.h
+    precompiled_headers.h
     touch_from_button.cpp
     touch_from_button.h
     sdl/sdl.cpp
@@ -37,3 +38,7 @@ target_link_libraries(input_common PUBLIC core PRIVATE common ${Boost_LIBRARIES}
 target_include_directories(input_common PRIVATE ${LIBUSB_INCLUDE_DIR})
 target_link_libraries(input_common PUBLIC ${LIBUSB_LIBRARIES})
 set_target_properties(input_common PROPERTIES INTERPROCEDURAL_OPTIMIZATION ${ENABLE_LTO})
+
+if (CITRA_USE_PRECOMPILED_HEADERS)
+    target_precompile_headers(input_common PRIVATE precompiled_headers.h)
+endif()
diff --git a/src/input_common/precompiled_headers.h b/src/input_common/precompiled_headers.h
new file mode 100644
index 000000000..ffbb5e177
--- /dev/null
+++ b/src/input_common/precompiled_headers.h
@@ -0,0 +1,7 @@
+// Copyright 2022 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_precompiled_headers.h"
diff --git a/src/network/CMakeLists.txt b/src/network/CMakeLists.txt
index 27bff7ce2..7ffd95368 100644
--- a/src/network/CMakeLists.txt
+++ b/src/network/CMakeLists.txt
@@ -7,6 +7,7 @@ add_library(network STATIC
     network_settings.h
     packet.cpp
     packet.h
+    precompiled_headers.h
     room.cpp
     room.h
     room_member.cpp
@@ -27,3 +28,7 @@ endif()
 
 target_link_libraries(network PRIVATE common enet Boost::serialization)
 set_target_properties(network PROPERTIES INTERPROCEDURAL_OPTIMIZATION ${ENABLE_LTO})
+
+if (CITRA_USE_PRECOMPILED_HEADERS)
+    target_precompile_headers(network PRIVATE precompiled_headers.h)
+endif()
diff --git a/src/network/precompiled_headers.h b/src/network/precompiled_headers.h
new file mode 100644
index 000000000..ffbb5e177
--- /dev/null
+++ b/src/network/precompiled_headers.h
@@ -0,0 +1,7 @@
+// Copyright 2022 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_precompiled_headers.h"
diff --git a/src/tests/CMakeLists.txt b/src/tests/CMakeLists.txt
index 1f0968f4d..118e2c9cf 100644
--- a/src/tests/CMakeLists.txt
+++ b/src/tests/CMakeLists.txt
@@ -9,6 +9,7 @@ add_executable(tests
     core/hle/kernel/hle_ipc.cpp
     core/memory/memory.cpp
     core/memory/vm_manager.cpp
+    precompiled_headers.h
     audio_core/audio_fixures.h
     audio_core/decoder_tests.cpp
 )
@@ -26,3 +27,7 @@ target_link_libraries(tests PRIVATE common core video_core audio_core)
 target_link_libraries(tests PRIVATE ${PLATFORM_LIBRARIES} Catch2::Catch2WithMain nihstro-headers Threads::Threads)
 
 add_test(NAME tests COMMAND tests)
+
+if (CITRA_USE_PRECOMPILED_HEADERS)
+    target_precompile_headers(tests PRIVATE precompiled_headers.h)
+endif()
diff --git a/src/tests/precompiled_headers.h b/src/tests/precompiled_headers.h
new file mode 100644
index 000000000..ffbb5e177
--- /dev/null
+++ b/src/tests/precompiled_headers.h
@@ -0,0 +1,7 @@
+// Copyright 2022 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_precompiled_headers.h"
diff --git a/src/video_core/CMakeLists.txt b/src/video_core/CMakeLists.txt
index 45f6e8d05..6685e26d3 100644
--- a/src/video_core/CMakeLists.txt
+++ b/src/video_core/CMakeLists.txt
@@ -10,6 +10,7 @@ add_library(video_core STATIC
     pica.h
     pica_state.h
     pica_types.h
+    precompiled_headers.h
     primitive_assembly.cpp
     primitive_assembly.h
     rasterizer_interface.h
@@ -163,3 +164,7 @@ set_target_properties(video_core PROPERTIES INTERPROCEDURAL_OPTIMIZATION ${ENABL
 if (ARCHITECTURE_x86_64)
     target_link_libraries(video_core PUBLIC xbyak)
 endif()
+
+if (CITRA_USE_PRECOMPILED_HEADERS)
+    target_precompile_headers(video_core PRIVATE precompiled_headers.h)
+endif()
diff --git a/src/video_core/precompiled_headers.h b/src/video_core/precompiled_headers.h
new file mode 100644
index 000000000..ffbb5e177
--- /dev/null
+++ b/src/video_core/precompiled_headers.h
@@ -0,0 +1,7 @@
+// Copyright 2022 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_precompiled_headers.h"
diff --git a/src/web_service/CMakeLists.txt b/src/web_service/CMakeLists.txt
index 87eb06755..1fd61ffa0 100644
--- a/src/web_service/CMakeLists.txt
+++ b/src/web_service/CMakeLists.txt
@@ -1,6 +1,7 @@
 add_library(web_service STATIC
     announce_room_json.cpp
     announce_room_json.h
+    precompiled_headers.h
     telemetry_json.cpp
     telemetry_json.h
     verify_login.cpp
@@ -22,3 +23,7 @@ if (ANDROID)
 elseif(WIN32)
     target_link_libraries(web_service PRIVATE crypt32)
 endif()
+
+if (CITRA_USE_PRECOMPILED_HEADERS)
+    target_precompile_headers(web_service PRIVATE precompiled_headers.h)
+endif()
diff --git a/src/web_service/precompiled_headers.h b/src/web_service/precompiled_headers.h
new file mode 100644
index 000000000..ffbb5e177
--- /dev/null
+++ b/src/web_service/precompiled_headers.h
@@ -0,0 +1,7 @@
+// Copyright 2022 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "common/common_precompiled_headers.h"