Replace cotire with CMake builtin precompiled headers support (Requires CMake version >= 3.16)

Author: soarqin

.gitignore

@@ -26,8 +26,6 @@ CMakeFiles
 Makefile
 cmake_install.cmake
 install_manifest.txt
-*_cotire.cmake
-cotire
 moc_*.cpp
 qrc_*.cpp
 ui_*.h

AI/BattleAI/CMakeLists.txt

@@ -36,8 +36,6 @@ target_include_directories(BattleAI PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})
 target_link_libraries(BattleAI PRIVATE vcmi)
 
 vcmi_set_output_dir(BattleAI "AI")
-
-set_target_properties(BattleAI PROPERTIES ${PCH_PROPERTIES})
-cotire(BattleAI)
+enable_pch(BattleAI)
 
 install(TARGETS BattleAI RUNTIME DESTINATION ${AI_LIB_DIR} LIBRARY DESTINATION ${AI_LIB_DIR})

AI/EmptyAI/CMakeLists.txt

@@ -18,7 +18,6 @@ target_include_directories(EmptyAI PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})
 target_link_libraries(EmptyAI PRIVATE vcmi)
 
 vcmi_set_output_dir(EmptyAI "AI")
-
-set_target_properties(EmptyAI PROPERTIES ${PCH_PROPERTIES})
+enable_pch(EmptyAI)
 
 install(TARGETS EmptyAI RUNTIME DESTINATION ${AI_LIB_DIR} LIBRARY DESTINATION ${AI_LIB_DIR})

AI/Nullkiller/CMakeLists.txt

@@ -135,8 +135,6 @@ target_link_libraries(Nullkiller PRIVATE vcmi fuzzylite::fuzzylite)
 target_link_libraries(Nullkiller PRIVATE TBB::tbb)
 
 vcmi_set_output_dir(Nullkiller "AI")
-
-set_target_properties(Nullkiller PROPERTIES ${PCH_PROPERTIES})
-cotire(Nullkiller)
+enable_pch(Nullkiller)
 
 install(TARGETS Nullkiller RUNTIME DESTINATION ${AI_LIB_DIR} LIBRARY DESTINATION ${AI_LIB_DIR})

AI/StupidAI/CMakeLists.txt

@@ -18,8 +18,6 @@ target_link_libraries(StupidAI PRIVATE vcmi)
 target_include_directories(StupidAI PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})
 
 vcmi_set_output_dir(StupidAI "AI")
-
-set_target_properties(StupidAI PROPERTIES ${PCH_PROPERTIES})
-cotire(StupidAI)
+enable_pch(StupidAI)
 
 install(TARGETS StupidAI RUNTIME DESTINATION ${AI_LIB_DIR} LIBRARY DESTINATION ${AI_LIB_DIR})

AI/VCAI/CMakeLists.txt

@@ -114,8 +114,6 @@ target_include_directories(VCAI PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})
 target_link_libraries(VCAI PRIVATE vcmi fuzzylite::fuzzylite)
 
 vcmi_set_output_dir(VCAI "AI")
-
-set_target_properties(VCAI PROPERTIES ${PCH_PROPERTIES})
-cotire(VCAI)
+enable_pch(VCAI)
 
 install(TARGETS VCAI RUNTIME DESTINATION ${AI_LIB_DIR} LIBRARY DESTINATION ${AI_LIB_DIR})

CMakeLists.txt

@@ -48,7 +48,9 @@ option(ENABLE_ERM "Enable compilation of ERM scripting module" ON)
 option(ENABLE_LUA "Enable compilation of LUA scripting module" ON)
 option(ENABLE_LAUNCHER "Enable compilation of launcher" ON)
 option(ENABLE_TEST "Enable compilation of unit tests" ON)
-option(ENABLE_PCH "Enable compilation using precompiled headers" ON)
+if(NOT ${CMAKE_VERSION} VERSION_LESS "3.16.0")
+	option(ENABLE_PCH "Enable compilation using precompiled headers" ON)
+endif(NOT ${CMAKE_VERSION} VERSION_LESS "3.16.0")
 option(ENABLE_GITVERSION "Enable Version.cpp with Git commit hash" ON)
 option(ENABLE_DEBUG_CONSOLE "Enable debug console for Windows builds" ON)
 option(ENABLE_MULTI_PROCESS_BUILDS "Enable /MP flag for MSVS solution" ON)
@@ -95,18 +97,14 @@ else()
 endif(ENABLE_GITVERSION)
 
 # Precompiled header configuration
-if(ENABLE_PCH)
-	include(cotire)
-	set(PCH_PROPERTIES
-		COTIRE_ENABLE_PRECOMPILED_HEADER ${ENABLE_PCH}
-		COTIRE_ADD_UNITY_BUILD FALSE
-		COTIRE_CXX_PREFIX_HEADER_INIT "StdInc.h"
-	)
-else()
-	set(PCH_PROPERTIES COTIRE_ADD_UNITY_BUILD FALSE)
-	macro(cotire ignore)
-	endmacro(cotire)
-endif(ENABLE_PCH)
+if(ENABLE_PCH AND NOT ${CMAKE_VERSION} VERSION_LESS "3.16.0")
+	macro(enable_pch name)
+		target_precompile_headers(${name} PRIVATE $<$<COMPILE_LANGUAGE:CXX>:<StdInc.h$<ANGLE-R>>)
+	endmacro(enable_pch)
+else(ENABLE_PCH AND NOT ${CMAKE_VERSION} VERSION_LESS "3.16.0")
+	macro(enable_pch ignore)
+	endmacro(enable_pch)
+endif(ENABLE_PCH AND NOT ${CMAKE_VERSION} VERSION_LESS "3.16.0")
 
 ############################################
 #        Documentation section             #

client/CMakeLists.txt

@@ -186,9 +186,7 @@ target_include_directories(vcmiclient
 	PUBLIC	${CMAKE_CURRENT_SOURCE_DIR})
 
 vcmi_set_output_dir(vcmiclient "")
-
-set_target_properties(vcmiclient PROPERTIES ${PCH_PROPERTIES})
-cotire(vcmiclient)
+enable_pch(vcmiclient)
 
 install(TARGETS vcmiclient DESTINATION ${BIN_DIR})