CMake: Use target_precompile_headers instead of cotire with CMake >= 3.16.0

CMakeLists.txt

@@ -20,7 +20,11 @@ project(TrinityCore)
 
 # CMake policies (can not be handled elsewhere)
 cmake_policy(SET CMP0005 NEW)
+if (CMAKE_VERSION VERSION_LESS "3.16.0")
   cmake_policy(SET CMP0043 OLD) # Disable 'Ignore COMPILE_DEFINITIONS_<Config> properties'
+else()
+  cmake_policy(SET CMP0043 NEW) # Cotire isn't used so set to NEW
+endif()
 cmake_policy(SET CMP0054 NEW) # Only interpret if() arguments as variables or keywords when unquoted - prevents intepreting if (SOME_STRING_VARIABLE MATCHES "MSVC") as if (SOME_STRING_VARIABLE MATCHES "1")
 
 if(POLICY CMP0074)
@@ -35,8 +39,12 @@ set(CMAKE_INSTALL_RPATH_USE_LINK_PATH 1)
 
 # set macro-directory
 list(APPEND CMAKE_MODULE_PATH
-  "${CMAKE_SOURCE_DIR}/cmake/macros"
+  "${CMAKE_SOURCE_DIR}/cmake/macros")
+
+if (CMAKE_VERSION VERSION_LESS "3.16.0")
+  list(APPEND CMAKE_MODULE_PATH
           "${CMAKE_SOURCE_DIR}/dep/cotire/CMake")
+endif()
 
 # build in Release-mode by default if not explicitly set
 if(CMAKE_GENERATOR STREQUAL "Ninja Multi-Config")

cmake/macros/FindPCHSupport.cmake

@@ -1,3 +1,4 @@
+if (CMAKE_VERSION VERSION_LESS "3.16.0")
   if (MSVC)
     # Specify the maximum PreCompiled Header memory allocation limit
     # Fixes a compiler-problem when using PCH - the /Ym flag is adjusted by the compiler in MSVC2012,
@@ -25,3 +26,10 @@ function(ADD_CXX_PCH TARGET_NAME_LIST PCH_HEADER)
 
     cotire(${TARGET_NAME_LIST})
   endfunction(ADD_CXX_PCH)
+else()
+  function(ADD_CXX_PCH TARGET_NAME_LIST PCH_HEADER)
+    foreach(TARGET_NAME ${TARGET_NAME_LIST})
+      target_precompile_headers(${TARGET_NAME} PRIVATE ${PCH_HEADER})
+    endforeach()
+  endfunction(ADD_CXX_PCH)
+endif()