From 286479198f19a94c6a57b5799f470cb855c4670e Mon Sep 17 00:00:00 2001
From: Chris Miles <akkadius1@gmail.com>
Date: Sun, 17 Dec 2023 19:04:21 -0600
Subject: [PATCH] [Compilation] Use pre-compiled headers for Windows (speed)
 (#3778)

* Experiment with PCH

* Another run

* GCC test

* Different test

* Another one

* Another one

* Lua headers

* PCH main zone primitives

* Tweaks

* Tweaks

* Tweaks

* Add EQEMU_BUILD_PCH option default to ON
---
 CMakeLists.txt        |  1 +
 common/CMakeLists.txt |  3 +++
 common/pch/pch.h      | 34 ++++++++++++++++++++++++++++++++++
 world/CMakeLists.txt  |  4 ++++
 zone/CMakeLists.txt   |  6 ++++++
 5 files changed, 48 insertions(+)
 create mode 100644 common/pch/pch.h

diff --git a/CMakeLists.txt b/CMakeLists.txt
index c771ae206..ea68bedcc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -17,6 +17,7 @@ SET(CMAKE_CXX_STANDARD_REQUIRED ON)
 SET(CMAKE_CXX_EXTENSIONS OFF)
 
 OPTION(EQEMU_BUILD_STATIC "Build with static linking" OFF)
+OPTION(EQEMU_BUILD_PCH "Build with precompiled headers (Windows)" ON)
 
 IF (EQEMU_BUILD_STATIC)
 	SET(BUILD_SHARED_LIBS OFF)
diff --git a/common/CMakeLists.txt b/common/CMakeLists.txt
index 517d0081e..d21fa0c79 100644
--- a/common/CMakeLists.txt
+++ b/common/CMakeLists.txt
@@ -792,5 +792,8 @@ IF (UNIX)
     SET_SOURCE_FILES_PROPERTIES("patches/sod.cpp" "patches/sof.cpp" "patches/rof.cpp" "patches/rof2.cpp" "patches/uf.cpp" PROPERTIES COMPILE_FLAGS -O0)
 ENDIF (UNIX)
 
+IF (WIN32 AND EQEMU_BUILD_PCH)
+    TARGET_PRECOMPILE_HEADERS(common PRIVATE pch/pch.h)
+ENDIF()
 
 SET(LIBRARY_OUTPUT_PATH ${PROJECT_BINARY_DIR}/bin)
diff --git a/common/pch/pch.h b/common/pch/pch.h
new file mode 100644
index 000000000..06b1d1a8f
--- /dev/null
+++ b/common/pch/pch.h
@@ -0,0 +1,34 @@
+// types
+#include <limits>
+#include <string>
+#include <cctype>
+#include <sstream>
+
+// containers
+#include <iterator>
+#include <set>
+#include <unordered_set>
+#include <map>
+#include <unordered_map>
+#include <list>
+#include <vector>
+
+// utilities
+#include <iostream>
+#include <cassert>
+#include <cmath>
+#include <memory>
+#include <functional>
+#include <algorithm>
+#include <utility>
+#include <tuple>
+#include <fstream>
+#include <cstdio>
+
+// fmt
+#include <fmt/format.h>
+
+// lua
+#include "lua.hpp"
+#include <luabind/luabind.hpp>
+#include <luabind/object.hpp>
diff --git a/world/CMakeLists.txt b/world/CMakeLists.txt
index c46b68d84..2d4c6ebaa 100644
--- a/world/CMakeLists.txt
+++ b/world/CMakeLists.txt
@@ -78,6 +78,10 @@ ADD_EXECUTABLE(world ${world_sources} ${world_headers})
 
 INSTALL(TARGETS world RUNTIME DESTINATION ${CMAKE_INSTALL_PREFIX}/bin)
 
+IF (WIN32 AND EQEMU_BUILD_PCH)
+    TARGET_PRECOMPILE_HEADERS(world PRIVATE ../common/pch/pch.h)
+ENDIF ()
+
 ADD_DEFINITIONS(-DWORLD)
 
 TARGET_LINK_LIBRARIES(world ${SERVER_LIBS})
diff --git a/zone/CMakeLists.txt b/zone/CMakeLists.txt
index fd3c28dc5..faa976ab9 100644
--- a/zone/CMakeLists.txt
+++ b/zone/CMakeLists.txt
@@ -284,6 +284,12 @@ ADD_EXECUTABLE(zone ${zone_sources} ${zone_headers})
 
 INSTALL(TARGETS zone RUNTIME DESTINATION ${CMAKE_INSTALL_PREFIX}/bin)
 
+IF (WIN32 AND EQEMU_BUILD_PCH)
+    TARGET_PRECOMPILE_HEADERS(zone PRIVATE ../common/pch/pch.h)
+    TARGET_PRECOMPILE_HEADERS(zone PRIVATE ../common/types.h ../common/eqemu_logsys.h ../common/eqemu_logsys_log_aliases.h ../common/features.h ../common/global_define.h)
+    TARGET_PRECOMPILE_HEADERS(zone PRIVATE mob.h npc.h corpse.h doors.h bot.h entity.h client.h zone.h)
+ENDIF()
+
 ADD_DEFINITIONS(-DZONE)
 
 TARGET_LINK_LIBRARIES(zone ${ZONE_LIBS})