From de1773affb7552d1b62b7adcd3a2a04d718feafe Mon Sep 17 00:00:00 2001
From: comex <comexk@gmail.com>
Date: Thu, 17 Oct 2013 00:06:34 -0400
Subject: [PATCH] Basic precompiled header support for Linux/OS X.  Shaves
 20-30% off full rebuild time on my system.

---
 CMakeLists.txt                                |  2 +
 Source/CMakeLists.txt                         | 47 ++++++++++++++++
 Source/Core/AudioCommon/CMakeLists.txt        |  3 +-
 Source/Core/Common/CMakeLists.txt             |  3 +-
 Source/Core/Core/CMakeLists.txt               |  3 +-
 Source/Core/DiscIO/CMakeLists.txt             |  3 +-
 Source/Core/InputCommon/CMakeLists.txt        |  2 +-
 Source/Core/VideoBackends/OGL/CMakeLists.txt  |  3 +-
 .../VideoBackends/Software/CMakeLists.txt     |  3 +-
 Source/Core/VideoCommon/CMakeLists.txt        |  3 +-
 Source/pch.h                                  | 55 +++++++++++++++++++
 11 files changed, 112 insertions(+), 15 deletions(-)
 create mode 100644 Source/pch.h

diff --git a/CMakeLists.txt b/CMakeLists.txt
index cc9f87065a..aeb8f1fcb0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,6 +11,7 @@ option(USE_GLES "Enables GLES2 And EGL, disables OGL" OFF)
 option(USE_GLES3 "Enables GLES3 and EGL" OFF)
 option(USE_UPNP "Enables UPnP port mapping support" ON)
 option(DISABLE_WX "Disable wxWidgets (use CLI interface)" OFF)
+option(ENABLE_PCH "Use PCH to speed up compilation" OFF)
 
 option(FASTLOG "Enable all logs" OFF)
 option(OPROFILING "Enable profiling" OFF)
@@ -817,3 +818,4 @@ list(APPEND CPACK_SOURCE_IGNORE_FILES "${CMAKE_BINARY_DIR}")
 # CPack must be included after the CPACK_* variables are set in order for those
 # variables to take effect.
 Include(CPack)
+
diff --git a/Source/CMakeLists.txt b/Source/CMakeLists.txt
index 6c962873a7..7c667ba551 100644
--- a/Source/CMakeLists.txt
+++ b/Source/CMakeLists.txt
@@ -1,3 +1,47 @@
+set(CMAKE_FAKELANG_CREATE_STATIC_LIBRARY "touch <TARGET>")
+if(ENABLE_PCH)
+	# This is actually a .h file, but trick cmake into compiling it as a source file
+	set(pch_out_filename "${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/pch.dir/pch.h")
+	set(pch_lib_filename "${CMAKE_CURRENT_BINARY_DIR}/libpch.a")
+	set(pch_src_filename "${CMAKE_CURRENT_SOURCE_DIR}/pch.h")
+
+	if(APPLE)
+		set(type objective-c++-header)
+	else()
+		set(type c++-header)
+	endif()
+
+	set_source_files_properties(
+		pch.h PROPERTIES
+		COMPILE_FLAGS "-x ${type}"
+		HEADER_FILE_ONLY 0
+		LANGUAGE CXX)
+
+	add_library(pch STATIC pch.h)
+
+	add_custom_command(
+		TARGET pch
+		PRE_LINK
+		COMMAND ln -fs "${pch_out_filename}.o" "${pch_out_filename}.gch"
+		COMMAND ln -fs "${pch_out_filename}.o" "${pch_out_filename}.pch"
+		COMMAND cp "${pch_src_filename}" "${pch_out_filename}")
+
+	set_target_properties(
+		pch PROPERTIES
+		LINKER_LANGUAGE FAKELANG)
+endif(ENABLE_PCH)
+macro(add_dolphin_library lib srcs libs)
+	add_library(${lib} STATIC ${srcs})
+	target_link_libraries(${lib} ${libs})
+	if(ENABLE_PCH)
+		add_dependencies(${lib} pch)
+		set_source_files_properties(
+			${srcs} PROPERTIES
+			COMPILE_FLAGS "-include ${pch_out_filename}"
+			OBJECT_DEPENDS "${pch_lib_filename}")
+	endif(ENABLE_PCH)
+endmacro(add_dolphin_library)
+
 add_subdirectory(Core)
 
 if (DSPTOOL)
@@ -8,4 +52,7 @@ if (UNITTESTS)
 	add_subdirectory(UnitTests)
 endif()
 
+
+
+
 # TODO: Add DSPSpy and TestSuite. Preferrably make them option()s and cpack components
diff --git a/Source/Core/AudioCommon/CMakeLists.txt b/Source/Core/AudioCommon/CMakeLists.txt
index 939956460d..314be71322 100644
--- a/Source/Core/AudioCommon/CMakeLists.txt
+++ b/Source/Core/AudioCommon/CMakeLists.txt
@@ -40,5 +40,4 @@ if(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
 	set(SRCS ${SRCS} Src/CoreAudioSoundStream.cpp)
 endif()
 
-add_library(audiocommon STATIC ${SRCS})
-target_link_libraries(audiocommon ${LIBS})
+add_dolphin_library(audiocommon "${SRCS}" "${LIBS}")
diff --git a/Source/Core/Common/CMakeLists.txt b/Source/Core/Common/CMakeLists.txt
index 0302ee78c8..ce76f003da 100644
--- a/Source/Core/Common/CMakeLists.txt
+++ b/Source/Core/Common/CMakeLists.txt
@@ -51,5 +51,4 @@ endif(WIN32)
 
 enable_precompiled_headers(Src/stdafx.h Src/stdafx.cpp SRCS)
 
-add_library(common STATIC ${SRCS})
-target_link_libraries(common ${CMAKE_THREAD_LIBS_INIT})
+add_dolphin_library(common "${SRCS}" "${CMAKE_THREAD_LIBS_INIT}")
diff --git a/Source/Core/Core/CMakeLists.txt b/Source/Core/Core/CMakeLists.txt
index 49cd34b372..07a6fc2aca 100644
--- a/Source/Core/Core/CMakeLists.txt
+++ b/Source/Core/Core/CMakeLists.txt
@@ -269,5 +269,4 @@ if(GDBSTUB)
 	set(SRCS ${SRCS} Src/PowerPC/GDBStub.cpp)
 endif(GDBSTUB)
 
-add_library(core STATIC ${SRCS})
-target_link_libraries(core ${LIBS})
+add_dolphin_library(core "${SRCS}" "${LIBS}")
diff --git a/Source/Core/DiscIO/CMakeLists.txt b/Source/Core/DiscIO/CMakeLists.txt
index 01e15a374f..f64f263e11 100644
--- a/Source/Core/DiscIO/CMakeLists.txt
+++ b/Source/Core/DiscIO/CMakeLists.txt
@@ -21,5 +21,4 @@ set(SRCS	Src/BannerLoader.cpp
 			Src/VolumeWiiCrypted.cpp
 			Src/WiiWad.cpp)
 
-add_library(discio STATIC ${SRCS})
-target_link_libraries(discio common)
+add_dolphin_library(discio "${SRCS}" "")
diff --git a/Source/Core/InputCommon/CMakeLists.txt b/Source/Core/InputCommon/CMakeLists.txt
index 76871e5b3b..f99351ffe2 100644
--- a/Source/Core/InputCommon/CMakeLists.txt
+++ b/Source/Core/InputCommon/CMakeLists.txt
@@ -32,4 +32,4 @@ elseif(ANDROID)
 				Src/ControllerInterface/Android/Android.cpp)
 endif()
 
-add_library(inputcommon ${SRCS})
+add_dolphin_library(inputcommon "${SRCS}" "")
diff --git a/Source/Core/VideoBackends/OGL/CMakeLists.txt b/Source/Core/VideoBackends/OGL/CMakeLists.txt
index 3e1d2aaa60..f8ccb85052 100644
--- a/Source/Core/VideoBackends/OGL/CMakeLists.txt
+++ b/Source/Core/VideoBackends/OGL/CMakeLists.txt
@@ -45,5 +45,4 @@ if(${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD" OR
 	set(LIBS	${LIBS} usbhid)
 endif()
 
-add_library(videoogl STATIC ${SRCS})
-target_link_libraries(videoogl ${LIBS})
+add_dolphin_library(videoogl "${SRCS}" "${LIBS}")
diff --git a/Source/Core/VideoBackends/Software/CMakeLists.txt b/Source/Core/VideoBackends/Software/CMakeLists.txt
index fd13be7f2e..2ba8e6c0c7 100644
--- a/Source/Core/VideoBackends/Software/CMakeLists.txt
+++ b/Source/Core/VideoBackends/Software/CMakeLists.txt
@@ -49,5 +49,4 @@ if(NOT (${CMAKE_SYSTEM_NAME} MATCHES "Darwin"))
 	set(LIBS	${LIBS} clrun)
 endif()
 
-add_library(videosoftware STATIC ${SRCS})
-target_link_libraries(videosoftware ${LIBS})
+add_dolphin_library(videosoftware "${SRCS}" "${LIBS}")
diff --git a/Source/Core/VideoCommon/CMakeLists.txt b/Source/Core/VideoCommon/CMakeLists.txt
index 8503377779..594624592c 100644
--- a/Source/Core/VideoCommon/CMakeLists.txt
+++ b/Source/Core/VideoCommon/CMakeLists.txt
@@ -61,8 +61,7 @@ if(LIBAV_FOUND OR WIN32)
 	set(SRCS ${SRCS} Src/AVIDump.cpp)
 endif()
 
-add_library(videocommon STATIC ${SRCS})
-target_link_libraries(videocommon ${LIBS})
+add_dolphin_library(videocommon "${SRCS}" "${LIBS}")
 
 if(${CMAKE_SYSTEM_NAME} MATCHES "Linux")
 	if(LIBAV_FOUND)
diff --git a/Source/pch.h b/Source/pch.h
new file mode 100644
index 0000000000..6a49c2b1f0
--- /dev/null
+++ b/Source/pch.h
@@ -0,0 +1,55 @@
+#include "Common.h"
+#include <algorithm>
+#include <array>
+#include <assert.h>
+#include <bitset>
+#include <cassert>
+#include <cctype>
+#include <cerrno>
+#include <cmath>
+#include <cstdarg>
+#include <cstddef>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <ctime>
+#include <ctype.h>
+#include <deque>
+#include <errno.h>
+#include <execinfo.h>
+#include <fcntl.h>
+#include <float.h>
+#include <fstream>
+#include <functional>
+#include <getopt.h>
+#include <iomanip>
+#include <iostream>
+#include <limits.h>
+#include <limits>
+#include <list>
+#include <locale.h>
+#include <map>
+#include <math.h>
+#include <memory.h>
+#include <memory>
+#include <mutex>
+#include <numeric>
+#include <pthread.h>
+#include <queue>
+#include <set>
+#include <sstream>
+#include <stack>
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <thread>
+#include <time.h>
+#include <type_traits>
+#include <unistd.h>
+#include <unordered_map>
+#include <unordered_set>
+#include <utility>
+#include <vector>