Build: Use the cotire library for precompiled header handling

* Required for handling flags inherited by linked projects
  correctly in the corresponding precompiled header.
* Reduces the maintenance effort for precompiled headers

(cherry picked from commit 92f96fc10e70b2d62cce832837477d958e2afbe3)

2 files changed, 16 insertions, 159 deletions

diff --git a/cmake/macros/ConfigureBaseTargets.cmake b/cmake/macros/ConfigureBaseTargets.cmake
index ca3773b8f01..1c85c512ad2 100644
--- a/cmake/macros/ConfigureBaseTargets.cmake
+++ b/cmake/macros/ConfigureBaseTargets.cmake
@@ -11,6 +11,9 @@
 # An interface library to make the target com available to other targets
 add_library(trinity-compile-option-interface INTERFACE)
 
+# Use -std=c++11 instead of -std=gnu++11
+set(CXX_EXTENSIONS OFF)
+
 # An interface library to make the target features available to other targets
 add_library(trinity-feature-interface INTERFACE)
 
diff --git a/cmake/macros/FindPCHSupport.cmake b/cmake/macros/FindPCHSupport.cmake
index 3dcd81baa90..abe7f40d171 100644
--- a/cmake/macros/FindPCHSupport.cmake
+++ b/cmake/macros/FindPCHSupport.cmake
@@ -1,163 +1,17 @@
-FUNCTION(GET_COMMON_PCH_PARAMS TARGET_NAME_LIST PCH_HEADER PCH_FE INCLUDE_PREFIX)
-  GET_FILENAME_COMPONENT(PCH_HEADER_N ${PCH_HEADER} NAME)
-  GET_DIRECTORY_PROPERTY(TARGET_INCLUDES INCLUDE_DIRECTORIES)
+include(cotire)
 
-  # Stores the inherited dependency definitions and include directories
-  # from the given target into the given variables
-  MACRO(CollectIncludes target inherited_includes inherited_definitions)
-    # Append the includes and definitions of the current target to the list
-    get_property(included TARGET ${target} PROPERTY INTERFACE_INCLUDE_DIRECTORIES)
-    LIST(APPEND "${inherited_includes}" ${included})
-    get_property(definitions TARGET ${target} PROPERTY INTERFACE_COMPILE_DEFINITIONS)
-    FOREACH(def ${definitions})
-      LIST(APPEND "${inherited_definitions}" "-D${def}")
-    ENDFOREACH()
-    # Add all inherited link targets which weren't included already
-    get_property(links TARGET ${target} PROPERTY INTERFACE_LINK_LIBRARIES)
-    # TODO Maybe catch circular dependencies?
-    FOREACH(target_link ${links})
-      IF(TARGET ${target_link})
-        CollectIncludes(${target_link} "${inherited_includes}" "${inherited_definitions}")
-      ENDIF()
-    ENDFOREACH()
-  ENDMACRO()
+function(ADD_CXX_PCH TARGET_NAME_LIST PCH_HEADER)
+  # Use the header for every target
+  foreach(TARGET_NAME ${TARGET_NAME_LIST})
+    # Disable unity builds
+    set_target_properties(${TARGET_NAME} PROPERTIES COTIRE_ADD_UNITY_BUILD OFF)
 
-  FOREACH(TARGET_NAME ${TARGET_NAME_LIST})
-    CollectIncludes(${TARGET_NAME} TARGET_INCLUDES TARGET_DEFINITIONS)
-  ENDFOREACH()
+    # Set the prefix header
+    set_target_properties(${TARGET_NAME} PROPERTIES COTIRE_CXX_PREFIX_HEADER_INIT ${PCH_HEADER})
 
-  LIST(REMOVE_DUPLICATES TARGET_INCLUDES)
-  LIST(REMOVE_DUPLICATES TARGET_DEFINITIONS)
+    # Workaround for cotire bug: https://github.com/sakra/cotire/issues/138
+    set_property(TARGET ${TARGET_NAME} PROPERTY CXX_STANDARD 14)
+  endforeach()
 
-  FOREACH(ITEM ${TARGET_INCLUDES})
-    LIST(APPEND INCLUDE_FLAGS_LIST "${INCLUDE_PREFIX}\"${ITEM}\" ")
-  ENDFOREACH(ITEM)
-
-  SET(PCH_INCLUDES ${TARGET_INCLUDES} PARENT_SCOPE)
-  SET(PCH_DEFINITIONS ${TARGET_DEFINITIONS} PARENT_SCOPE)
-  SET(PCH_HEADER_NAME ${PCH_HEADER_N} PARENT_SCOPE)
-  SET(PCH_HEADER_OUT ${CMAKE_CURRENT_BINARY_DIR}/${PCH_HEADER_N}.${PCH_FE} PARENT_SCOPE)
-  SET(INCLUDE_FLAGS ${INCLUDE_FLAGS_LIST} PARENT_SCOPE)
-ENDFUNCTION(GET_COMMON_PCH_PARAMS)
-
-FUNCTION(GENERATE_CXX_PCH_COMMAND TARGET_NAME_LIST INCLUDE_FLAGS IN PCH_SRC OUT)
-  include_directories(${PCH_INCLUDES})
-  add_definitions(${PCH_DEFINITIONS})
-
-  IF (CMAKE_BUILD_TYPE)
-    STRING(TOUPPER _${CMAKE_BUILD_TYPE} CURRENT_BUILD_TYPE)
-  ENDIF ()
-
-  SET(COMPILE_FLAGS ${CMAKE_CXX_FLAGS${CURRENT_BUILD_TYPE}})
-  LIST(APPEND COMPILE_FLAGS ${CMAKE_CXX_FLAGS})
-
-  IF ("${CMAKE_SYSTEM_NAME}" MATCHES "Darwin")
-    IF (NOT "${CMAKE_OSX_ARCHITECTURES}" STREQUAL "")
-      LIST(APPEND COMPILE_FLAGS "-arch ${CMAKE_OSX_ARCHITECTURES}")
-    ENDIF ()
-    IF (NOT "${CMAKE_OSX_SYSROOT}" STREQUAL "")
-      LIST(APPEND COMPILE_FLAGS "-isysroot ${CMAKE_OSX_SYSROOT}")
-    ENDIF ()
-    IF (NOT "${CMAKE_OSX_DEPLOYMENT_TARGET}" STREQUAL "")
-      LIST(APPEND COMPILE_FLAGS "-mmacosx-version-min=${CMAKE_OSX_DEPLOYMENT_TARGET}")
-    ENDIF ()
-  ENDIF ()
-
-  GET_DIRECTORY_PROPERTY(TARGET_DEFINITIONS COMPILE_DEFINITIONS)
-  FOREACH(ITEM ${TARGET_DEFINITIONS})
-    LIST(APPEND DEFINITION_FLAGS "-D${ITEM} ")
-  ENDFOREACH(ITEM)
-
-  SEPARATE_ARGUMENTS(COMPILE_FLAGS)
-  SEPARATE_ARGUMENTS(INCLUDE_FLAGS)
-  SEPARATE_ARGUMENTS(DEFINITION_FLAGS)
-
-  GET_FILENAME_COMPONENT(PCH_SRC_N ${PCH_SRC} NAME)
-  ADD_LIBRARY(${PCH_SRC_N}_dephelp MODULE ${PCH_SRC})
-
-  ADD_CUSTOM_COMMAND(
-    OUTPUT ${OUT}
-    COMMAND ${CMAKE_CXX_COMPILER}
-    ARGS ${DEFINITION_FLAGS} ${COMPILE_FLAGS} ${INCLUDE_FLAGS} -x c++-header -c ${IN} -o ${OUT}
-    DEPENDS ${IN} ${PCH_SRC_N}_dephelp
-    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
-  )
-
-  ADD_CUSTOM_TARGET(generate_${PCH_SRC_N}
-    DEPENDS ${OUT}
-  )
-
-  FOREACH(TARGET_NAME ${TARGET_NAME_LIST})
-    ADD_DEPENDENCIES(${TARGET_NAME} generate_${PCH_SRC_N})
-  ENDFOREACH()
-
-ENDFUNCTION(GENERATE_CXX_PCH_COMMAND)
-
-FUNCTION(ADD_CXX_PCH_GCC TARGET_NAME_LIST PCH_HEADER PCH_SOURCE)
-  GET_COMMON_PCH_PARAMS("${TARGET_NAME_LIST}" ${PCH_HEADER} "gch" "-I")
-  GENERATE_CXX_PCH_COMMAND("${TARGET_NAME_LIST}" "${INCLUDE_FLAGS}" ${PCH_HEADER} ${PCH_SOURCE} ${PCH_HEADER_OUT})
-
-  FOREACH(TARGET_NAME ${TARGET_NAME_LIST})
-    SET_TARGET_PROPERTIES(
-      ${TARGET_NAME} PROPERTIES
-      COMPILE_FLAGS "-include ${CMAKE_CURRENT_BINARY_DIR}/${PCH_HEADER_NAME}"
-    )
-  ENDFOREACH()
-ENDFUNCTION(ADD_CXX_PCH_GCC)
-
-FUNCTION(ADD_CXX_PCH_CLANG TARGET_NAME_LIST PCH_HEADER PCH_SOURCE)
-  GET_COMMON_PCH_PARAMS("${TARGET_NAME_LIST}" ${PCH_HEADER} "pch" "-I")
-  GENERATE_CXX_PCH_COMMAND("${TARGET_NAME_LIST}" "${INCLUDE_FLAGS}" ${PCH_HEADER} ${PCH_SOURCE} ${PCH_HEADER_OUT})
-
-  FOREACH(TARGET_NAME ${TARGET_NAME_LIST})
-    SET_TARGET_PROPERTIES(
-      ${TARGET_NAME} PROPERTIES
-      COMPILE_FLAGS "-include-pch ${PCH_HEADER_OUT}"
-    )
-  ENDFOREACH()
-ENDFUNCTION(ADD_CXX_PCH_CLANG)
-
-FUNCTION(ADD_CXX_PCH_MSVC TARGET_NAME_LIST PCH_HEADER PCH_SOURCE)
-  GET_COMMON_PCH_PARAMS("${TARGET_NAME_LIST}" ${PCH_HEADER} "pch" "/I")
-
-  FOREACH(TARGET_NAME ${TARGET_NAME_LIST})
-	SET(PCH_COMPILE_FLAGS "/FI${PCH_HEADER_NAME} /Yu${PCH_HEADER_NAME}")
-    IF (NOT ${CMAKE_MAKE_PROGRAM} MATCHES "MSBuild")
-      SET(PCH_COMPILE_FLAGS "${PCH_COMPILE_FLAGS} /Fp${PCH_HEADER_OUT}")
-      SET(TARGET_SOURCES_LIST "")
-      GET_PROPERTY(TARGET_SOURCES_LIST TARGET ${TARGET_NAME} PROPERTY SOURCES)
-      LIST(REMOVE_ITEM TARGET_SOURCES_LIST ${PCH_SOURCE})
-      SET_SOURCE_FILES_PROPERTIES(${TARGET_SOURCES_LIST} PROPERTIES OBJECT_DEPENDS "${CMAKE_CURRENT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/${TARGET_NAME}.dir/${PCH_SOURCE}.obj")
-    ENDIF()
-    SET_TARGET_PROPERTIES(
-      ${TARGET_NAME} PROPERTIES
-      COMPILE_FLAGS "${PCH_COMPILE_FLAGS}"
-    )
-  ENDFOREACH()
-
-  SET_SOURCE_FILES_PROPERTIES(
-    ${PCH_SOURCE} PROPERTIES
-    COMPILE_FLAGS "/Yc${PCH_HEADER_NAME}"
-  )
-ENDFUNCTION(ADD_CXX_PCH_MSVC)
-
-FUNCTION(ADD_CXX_PCH_XCODE TARGET_NAME_LIST PCH_HEADER PCH_SOURCE)
-  FOREACH(TARGET_NAME ${TARGET_NAME_LIST})
-    SET_TARGET_PROPERTIES("${TARGET_NAME}" PROPERTIES
-      XCODE_ATTRIBUTE_GCC_PRECOMPILE_PREFIX_HEADER YES
-      XCODE_ATTRIBUTE_GCC_PREFIX_HEADER "${CMAKE_CURRENT_SOURCE_DIR}/${PCH_HEADER}"
-    )
-  ENDFOREACH()
-ENDFUNCTION(ADD_CXX_PCH_XCODE)
-
-FUNCTION(ADD_CXX_PCH TARGET_NAME_LIST PCH_HEADER PCH_SOURCE)
-  IF (CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
-    ADD_CXX_PCH_MSVC("${TARGET_NAME_LIST}" ${PCH_HEADER} ${PCH_SOURCE})
-  ELSEIF ("${CMAKE_GENERATOR}" MATCHES "Xcode")
-    ADD_CXX_PCH_XCODE("${TARGET_NAME_LIST}" ${PCH_HEADER} ${PCH_SOURCE})
-  ELSEIF ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
-    ADD_CXX_PCH_CLANG("${TARGET_NAME_LIST}" ${PCH_HEADER} ${PCH_SOURCE})
-  ELSEIF ("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU")
-    ADD_CXX_PCH_GCC("${TARGET_NAME_LIST}" ${PCH_HEADER} ${PCH_SOURCE})
-  ENDIF ()
-ENDFUNCTION(ADD_CXX_PCH)
+  cotire(${TARGET_NAME_LIST})
+endfunction(ADD_CXX_PCH)