From b330b46ee366399c9339ed1f65924608c964d7f8 Mon Sep 17 00:00:00 2001
From: kervala <none@none>
Date: Sat, 8 Dec 2012 11:34:39 +0100
Subject: [PATCH] Fixed: PCH finally working under Linux and Mac OS X (never
 worked before)

---
 code/CMakeModules/PCHSupport.cmake | 582 ++++++++++++++++++-----------
 1 file changed, 358 insertions(+), 224 deletions(-)

diff --git a/code/CMakeModules/PCHSupport.cmake b/code/CMakeModules/PCHSupport.cmake
index 0ef2243d6..d444bfa3d 100644
--- a/code/CMakeModules/PCHSupport.cmake
+++ b/code/CMakeModules/PCHSupport.cmake
@@ -9,250 +9,384 @@
 #   ADD_NATIVE_PRECOMPILED_HEADER _targetName _inputh _inputcpp
 
 IF(MSVC)
-	SET(PCHSupport_FOUND TRUE)
-	SET(_PCH_include_prefix "/I")
+  SET(PCHSupport_FOUND TRUE)
+  SET(_PCH_include_prefix "/I")
 ELSE(MSVC)
-	IF(CMAKE_COMPILER_IS_GNUCXX)
-		EXEC_PROGRAM(${CMAKE_CXX_COMPILER}
-			ARGS ${CMAKE_CXX_COMPILER_ARG1} -dumpversion
-			OUTPUT_VARIABLE gcc_compiler_version)
-
-		IF(gcc_compiler_version MATCHES "4\\.[0-9]\\.[0-9]")
-			SET(PCHSupport_FOUND TRUE)
-		ELSE(gcc_compiler_version MATCHES "4\\.[0-9]\\.[0-9]")
-			IF(gcc_compiler_version MATCHES "3\\.4\\.[0-9]")
-				SET(PCHSupport_FOUND TRUE)
-			ENDIF(gcc_compiler_version MATCHES "3\\.4\\.[0-9]")
-		ENDIF(gcc_compiler_version MATCHES "4\\.[0-9]\\.[0-9]")
-	ELSE(CMAKE_COMPILER_IS_GNUCXX)
-		# TODO: make tests for other compilers than GCC
-		SET(PCHSupport_FOUND TRUE)
-	ENDIF(CMAKE_COMPILER_IS_GNUCXX)
-
-	SET(_PCH_include_prefix "-I")
+  IF(CMAKE_COMPILER_IS_GNUCXX)
+    EXEC_PROGRAM(${CMAKE_CXX_COMPILER}
+      ARGS ${CMAKE_CXX_COMPILER_ARG1} -dumpversion
+      OUTPUT_VARIABLE gcc_compiler_version)
+
+    IF(gcc_compiler_version MATCHES "^4\\.1(\\.[0-9]+)?")
+      SET(PCHSupport_FOUND FALSE)
+    ELSEIF(gcc_compiler_version MATCHES "^4\\.[0-9]+(\\.[0-9]+)?")
+      SET(PCHSupport_FOUND TRUE)
+    ENDIF(gcc_compiler_version MATCHES "^4\\.1(\\.[0-9]+)?")
+  ELSE(CMAKE_COMPILER_IS_GNUCXX)
+    # TODO: make tests for other compilers than GCC
+    SET(PCHSupport_FOUND TRUE)
+  ENDIF(CMAKE_COMPILER_IS_GNUCXX)
+
+  SET(_PCH_include_prefix "-I")
 ENDIF(MSVC)
 
-MACRO(_PCH_GET_COMPILE_FLAGS _out_compile_flags)
-	STRING(TOUPPER "CMAKE_CXX_FLAGS_${CMAKE_BUILD_TYPE}" _flags_var_name)
-	SET(_FLAGS ${${_flags_var_name}} )
-
-	IF(NOT MSVC)
-		GET_TARGET_PROPERTY(_targetType ${_PCH_current_target} TYPE)
-		IF(${_targetType} STREQUAL SHARED_LIBRARY OR ${_targetType} STREQUAL MODULE_LIBRARY)
-			LIST(APPEND _FLAGS "-fPIC")
-		ENDIF(${_targetType} STREQUAL SHARED_LIBRARY OR ${_targetType} STREQUAL MODULE_LIBRARY)
-	ENDIF(NOT MSVC)
-
-	GET_DIRECTORY_PROPERTY(DIRINC INCLUDE_DIRECTORIES )
-	FOREACH(item ${DIRINC})
-		LIST(APPEND _FLAGS " ${_PCH_include_prefix}\"${item}\"")
-	ENDFOREACH(item)
-
-	# Required for CMake 2.6
-	SET(GLOBAL_DEFINITIONS "")
-	GET_DIRECTORY_PROPERTY(DEFINITIONS COMPILE_DEFINITIONS)
-	FOREACH(item ${DEFINITIONS})
-		LIST(APPEND GLOBAL_DEFINITIONS -D${item})
-	ENDFOREACH(item)
-
-	GET_DIRECTORY_PROPERTY(_directory_flags DEFINITIONS)
-	GET_DIRECTORY_PROPERTY(_directory_definitions DIRECTORY ${CMAKE_SOURCE_DIR} DEFINITIONS)
-	LIST(APPEND _FLAGS ${GLOBAL_DEFINITIONS})
-	LIST(APPEND _FLAGS ${_directory_flags})
-	LIST(APPEND _FLAGS ${_directory_definitions})
-	LIST(APPEND _FLAGS ${CMAKE_CXX_FLAGS})
-
-	# Format definitions
-	SEPARATE_ARGUMENTS(_FLAGS)
-
-	IF(CLANG)
-		SET(_IGNORE_NEXT OFF)
-		FOREACH(item ${_FLAGS})
-			IF(_IGNORE_NEXT)
-				SET(_IGNORE_NEXT OFF)
-			ELSE(_IGNORE_NEXT)
-				IF(item MATCHES "^-Xarch")
-					SET(_IGNORE_NEXT ON)
-				ELSEIF(item MATCHES "^-arch")
-					SET(_IGNORE_NEXT ON)
-				ELSE(item MATCHES "^-Xarch")
-					LIST(APPEND ${_out_compile_flags} ${item})					
-				ENDIF(item MATCHES "^-Xarch")
-			ENDIF(_IGNORE_NEXT)
-		ENDFOREACH(item)
-	ELSE(CLANG)
-		SET(${_out_compile_flags} ${_FLAGS})
-	ENDIF(CLANG)
-ENDMACRO(_PCH_GET_COMPILE_FLAGS)
-
-MACRO(_PCH_GET_PDB_FILENAME out_filename _target)
-	# determine output directory based on target type
-	GET_TARGET_PROPERTY(_targetType ${_target} TYPE)
-	IF(${_targetType} STREQUAL EXECUTABLE)
-		SET(_targetOutput ${CMAKE_RUNTIME_OUTPUT_DIRECTORY})
-	ELSEIF(${_targetType} STREQUAL STATIC_LIBRARY)
-		SET(_targetOutput ${CMAKE_ARCHIVE_OUTPUT_DIRECTORY})
-	ELSE(${_targetType} STREQUAL EXECUTABLE)
-		SET(_targetOutput ${CMAKE_LIBRARY_OUTPUT_DIRECTORY})
-	ENDIF(${_targetType} STREQUAL EXECUTABLE)
-
-	# determine target postfix
-	STRING(TOUPPER "${CMAKE_BUILD_TYPE}_POSTFIX" _postfix_var_name)
-	GET_TARGET_PROPERTY(_targetPostfix ${_target} ${_postfix_var_name})
-	IF(${_targetPostfix} MATCHES NOTFOUND)
-		SET(_targetPostfix "")
-	ENDIF(${_targetPostfix} MATCHES NOTFOUND)
-
-	SET(${out_filename} "${_targetOutput}/${_target}${_targetPostfix}.pdb")
-ENDMACRO(_PCH_GET_PDB_FILENAME)
-
-MACRO(_PCH_GET_COMPILE_COMMAND out_command _input _inputcpp _output)
-	IF(CMAKE_CXX_COMPILER_ARG1)
-		# remove leading space in compiler argument
-		STRING(REGEX REPLACE "^ +" "" pchsupport_compiler_cxx_arg1 ${CMAKE_CXX_COMPILER_ARG1})
-	ELSE(CMAKE_CXX_COMPILER_ARG1)
-		SET(pchsupport_compiler_cxx_arg1 "")
-	ENDIF(CMAKE_CXX_COMPILER_ARG1)
-
-	IF(MSVC)
-		_PCH_GET_PDB_FILENAME(PDB_FILE ${_PCH_current_target})
-		SET(${out_command} ${CMAKE_CXX_COMPILER} ${pchsupport_compiler_cxx_arg1} ${_compile_FLAGS} /Yc /Fp\"${_output}\" ${_inputcpp} /c /Fd\"${PDB_FILE}\")
-	ELSE(MSVC)
-		SET(HEADER_FORMAT "c++-header")
-		IF(APPLE)
-			SET(HEADER_FORMAT "objective-${HEADER_FORMAT}")
-		ENDIF(APPLE)
-		SET(${out_command} ${CMAKE_CXX_COMPILER} ${pchsupport_compiler_cxx_arg1} ${_compile_FLAGS} -x ${HEADER_FORMAT} -o ${_output} -c ${_input})
-	ENDIF(MSVC)
-ENDMACRO(_PCH_GET_COMPILE_COMMAND)
-
-MACRO(GET_PRECOMPILED_HEADER_OUTPUT _targetName _input _output)
-	IF(MSVC)
-		GET_FILENAME_COMPONENT(_name ${_input} NAME_WE)
-		SET(_output "${CMAKE_CURRENT_BINARY_DIR}/${_name}.pch")
-	ELSE(MSVC)
-		GET_FILENAME_COMPONENT(_name ${_input} NAME)
-		SET(_output "${CMAKE_CURRENT_BINARY_DIR}/${_name}.gch")
-	ENDIF(MSVC)
-ENDMACRO(GET_PRECOMPILED_HEADER_OUTPUT _targetName _input)
-
-MACRO(ADD_PRECOMPILED_HEADER_TO_TARGET _targetName _input _pch_output_to_use )
-	GET_TARGET_PROPERTY(oldProps ${_targetName} COMPILE_FLAGS)
-	IF(${oldProps} MATCHES NOTFOUND)
-		SET(oldProps "")
-	ENDIF(${oldProps} MATCHES NOTFOUND)
-
-	IF(MSVC)
-		SET(_target_cflags "${oldProps} /Yu\"${_input}\" /FI\"${_input}\" /Fp\"${_pch_output_to_use}\"")
-	ELSE(MSVC)
-		# to do: test whether compiler flags match between target  _targetName
-		# and _pch_output_to_use
-		FILE(TO_NATIVE_PATH ${_pch_output_to_use} _native_pch_path)
-
-		# for use with distcc and gcc >4.0.1 if preprocessed files are accessible
-		# on all remote machines set
-		# PCH_ADDITIONAL_COMPILER_FLAGS to -fpch-preprocess
-		SET(_target_cflags "${oldProps} ${PCH_ADDITIONAL_COMPILER_FLAGS}-include ${_input} -Winvalid-pch")
-	ENDIF(MSVC)
-
-	SET_TARGET_PROPERTIES(${_targetName} PROPERTIES COMPILE_FLAGS ${_target_cflags})
-	IF(oldProps)
-		SET_TARGET_PROPERTIES(${_targetName}_pch_dephelp PROPERTIES COMPILE_FLAGS ${oldProps})
-	ENDIF(oldProps)
-	ADD_CUSTOM_TARGET(pch_Generate_${_targetName} DEPENDS ${_pch_output_to_use})
-	ADD_DEPENDENCIES(${_targetName} pch_Generate_${_targetName})
+# Set PCH_FLAGS for common flags, PCH_ARCH_XXX_FLAGS for specific archs flags and PCH_ARCHS for archs
+MACRO(PCH_SET_COMPILE_FLAGS _target)
+  SET(PCH_FLAGS)
+  SET(PCH_ARCHS)
+
+  SET(FLAGS)
+  LIST(APPEND _FLAGS ${CMAKE_CXX_FLAGS})
+
+  STRING(TOUPPER "${CMAKE_BUILD_TYPE}" _UPPER_BUILD)
+  LIST(APPEND _FLAGS " ${CMAKE_CXX_FLAGS_${_UPPER_BUILD}}")
+
+  IF(NOT MSVC)
+    GET_TARGET_PROPERTY(_targetType ${_target} TYPE)
+    IF(${_targetType} STREQUAL SHARED_LIBRARY OR ${_targetType} STREQUAL MODULE_LIBRARY)
+      LIST(APPEND _FLAGS " -fPIC")
+    ENDIF(${_targetType} STREQUAL SHARED_LIBRARY OR ${_targetType} STREQUAL MODULE_LIBRARY)
+  ENDIF(NOT MSVC)
+
+  GET_DIRECTORY_PROPERTY(DIRINC INCLUDE_DIRECTORIES)
+  FOREACH(item ${DIRINC})
+    LIST(APPEND _FLAGS " ${_PCH_include_prefix}\"${item}\"")
+  ENDFOREACH(item)
+
+  # Required for CMake 2.6
+  SET(GLOBAL_DEFINITIONS)
+  GET_DIRECTORY_PROPERTY(DEFINITIONS COMPILE_DEFINITIONS)
+  FOREACH(item ${DEFINITIONS})
+    LIST(APPEND GLOBAL_DEFINITIONS " -D${item}")
+  ENDFOREACH(item)
+
+  GET_DIRECTORY_PROPERTY(DEFINITIONS COMPILE_DEFINITIONS_${_UPPER_BUILD})
+  FOREACH(item ${DEFINITIONS})
+    LIST(APPEND GLOBAL_DEFINITIONS " -D${item}")
+  ENDFOREACH(item)
+
+  GET_TARGET_PROPERTY(oldProps ${_target} COMPILE_FLAGS)
+  IF(oldProps)
+    LIST(APPEND _FLAGS " ${oldProps}")
+  ENDIF(oldProps)
+
+  GET_TARGET_PROPERTY(oldPropsBuild ${_target} COMPILE_FLAGS_${_UPPER_BUILD})
+  IF(oldPropsBuild)
+    LIST(APPEND _FLAGS " ${oldPropsBuild}")
+  ENDIF(oldPropsBuild)
+
+  GET_DIRECTORY_PROPERTY(_directory_flags DEFINITIONS)
+  GET_DIRECTORY_PROPERTY(_directory_definitions DIRECTORY ${CMAKE_SOURCE_DIR} DEFINITIONS)
+  LIST(APPEND _FLAGS " ${GLOBAL_DEFINITIONS}")
+  LIST(APPEND _FLAGS " ${_directory_flags}")
+  LIST(APPEND _FLAGS " ${_directory_definitions}")
+
+  STRING(REGEX REPLACE " +" " " _FLAGS ${_FLAGS})
+
+  # Format definitions
+  SEPARATE_ARGUMENTS(_FLAGS)
+
+  IF(CLANG)
+    # Determining all architectures and get common flags
+    SET(_ARCH_NEXT)
+    SET(_XARCH_NEXT)
+    FOREACH(item ${_FLAGS})
+      IF(_ARCH_NEXT)
+        LIST(FIND PCH_ARCHS ${item} ITEM_FOUND)
+        IF(ITEM_FOUND EQUAL -1)
+          LIST(APPEND PCH_ARCHS ${item})
+          STRING(TOUPPER "${item}" _UPPER_ARCH)
+          SET(PCH_ARCH_${_UPPER_ARCH}_FLAGS "-arch" ${item})
+        ENDIF(ITEM_FOUND EQUAL -1)
+        SET(_ARCH_NEXT OFF)
+      ELSEIF(_XARCH_NEXT)
+        SET(_XARCH_NEXT OFF)
+      ELSE(_ARCH_NEXT)
+        IF(item MATCHES "^-arch")
+          SET(_ARCH_NEXT ON)
+        ELSEIF(item MATCHES "^-Xarch_")
+          STRING(REGEX REPLACE "-Xarch_([a-z0-9_]+)" "\\1" item ${item})
+          LIST(FIND PCH_ARCHS ${item} ITEM_FOUND)
+          IF(ITEM_FOUND EQUAL -1)
+            LIST(APPEND PCH_ARCHS ${item})
+            STRING(TOUPPER "${item}" _UPPER_ARCH)
+            SET(PCH_ARCH_${_UPPER_ARCH}_FLAGS "-arch" ${item})
+          ENDIF(ITEM_FOUND EQUAL -1)
+          SET(_XARCH_NEXT ON)
+        ELSE(item MATCHES "^-arch")
+          LIST(APPEND PCH_FLAGS ${item})
+        ENDIF(item MATCHES "^-arch")
+      ENDIF(_ARCH_NEXT)
+    ENDFOREACH(item)
+
+    # Get architcture specific flags
+    SET(_XARCH_NEXT)
+    FOREACH(item ${_FLAGS})
+      IF(_XARCH_NEXT)
+        STRING(TOUPPER "${_XARCH_NEXT}" _UPPER_XARCH)
+        LIST(APPEND PCH_ARCH_${_UPPER_XARCH}_FLAGS ${item})
+        SET(_XARCH_NEXT OFF)
+      ELSE(_XARCH_NEXT)
+        IF(item MATCHES "^-Xarch_")
+          STRING(SUBSTRING "${item}" 7 -1 _XARCH_NEXT)
+        ENDIF(item MATCHES "^-Xarch_")
+      ENDIF(_XARCH_NEXT)
+    ENDFOREACH(item)
+
+    # Remove duplicated architectures
+    IF(_ARCHS AND PCH_ARCHS)
+      LIST(REMOVE_DUPLICATES PCH_ARCHS)
+    ENDIF(_ARCHS AND PCH_ARCHS)
+  ELSE(CLANG)
+    SET(PCH_FLAGS ${_FLAGS})
+  ENDIF(CLANG)
+
+  IF(PCH_FLAGS)
+    LIST(REMOVE_DUPLICATES PCH_FLAGS)
+  ENDIF(PCH_FLAGS)
+ENDMACRO(PCH_SET_COMPILE_FLAGS)
+
+MACRO(GET_PDB_FILENAME _out_filename _target)
+  # determine output directory based on target type
+  GET_TARGET_PROPERTY(_targetType ${_target} TYPE)
+  IF(${_targetType} STREQUAL EXECUTABLE)
+    SET(_targetOutput ${CMAKE_RUNTIME_OUTPUT_DIRECTORY})
+  ELSEIF(${_targetType} STREQUAL STATIC_LIBRARY)
+    SET(_targetOutput ${CMAKE_ARCHIVE_OUTPUT_DIRECTORY})
+  ELSE(${_targetType} STREQUAL EXECUTABLE)
+    SET(_targetOutput ${CMAKE_LIBRARY_OUTPUT_DIRECTORY})
+  ENDIF(${_targetType} STREQUAL EXECUTABLE)
+
+  # determine target postfix
+  STRING(TOUPPER "${CMAKE_BUILD_TYPE}_POSTFIX" _postfix_var_name)
+  GET_TARGET_PROPERTY(_targetPostfix ${_target} ${_postfix_var_name})
+  IF(${_targetPostfix} MATCHES NOTFOUND)
+    SET(_targetPostfix "")
+  ENDIF(${_targetPostfix} MATCHES NOTFOUND)
+
+  SET(${_out_filename} "${_targetOutput}/${_target}${_targetPostfix}.pdb")
+ENDMACRO(GET_PDB_FILENAME)
+
+MACRO(PCH_SET_COMPILE_COMMAND _inputcpp _compile_FLAGS)
+  IF(CMAKE_CXX_COMPILER_ARG1)
+    # remove leading space in compiler argument
+    STRING(REGEX REPLACE "^ +" "" pchsupport_compiler_cxx_arg1 ${CMAKE_CXX_COMPILER_ARG1})
+  ELSE(CMAKE_CXX_COMPILER_ARG1)
+    SET(pchsupport_compiler_cxx_arg1 "")
+  ENDIF(CMAKE_CXX_COMPILER_ARG1)
+
+  IF(MSVC)
+    GET_PDB_FILENAME(PDB_FILE ${_PCH_current_target})
+    SET(PCH_COMMAND ${CMAKE_CXX_COMPILER} ${pchsupport_compiler_cxx_arg1} ${_compile_FLAGS} /Yc /Fp"${PCH_OUTPUT}" ${_inputcpp} /Fd"${PDB_FILE}" /c /Fo"${PCH_OUTPUT}.obj")
+  ELSE(MSVC)
+    SET(HEADER_FORMAT "c++-header")
+    SET(_FLAGS "")
+    IF(APPLE)
+      SET(HEADER_FORMAT "objective-${HEADER_FORMAT}")
+      SET(_FLAGS -fobjc-abi-version=2 -fobjc-legacy-dispatch)
+    ENDIF(APPLE)
+    SET(PCH_COMMAND ${CMAKE_CXX_COMPILER} ${pchsupport_compiler_cxx_arg1} ${_compile_FLAGS} ${_FLAGS} -x ${HEADER_FORMAT} -o ${PCH_OUTPUT} -c ${PCH_INPUT})
+  ENDIF(MSVC)
+ENDMACRO(PCH_SET_COMPILE_COMMAND)
+
+MACRO(PCH_SET_PRECOMPILED_HEADER_OUTPUT _targetName _input _arch _language)
+  SET(_OUTPUT_DIR "${CMAKE_CURRENT_BINARY_DIR}/${_targetName}_pch")
+
+  IF(MSVC)
+    FILE(MAKE_DIRECTORY ${_OUTPUT_DIR})
+    GET_FILENAME_COMPONENT(_name ${_input} NAME_WE)
+    SET(PCH_INPUT ${_input})
+    SET(PCH_OUTPUT "${_OUTPUT_DIR}/${_name}.pch")
+  ELSE(MSVC)
+    IF(NOT "${_arch}" STREQUAL "")
+      SET(_OUTPUT_DIR "${_OUTPUT_DIR}_${_arch}")
+    ENDIF(NOT "${_arch}" STREQUAL "")
+
+    IF(NOT "${_language}" STREQUAL "")
+      SET(_OUTPUT_DIR "${_OUTPUT_DIR}_${_language}")
+    ENDIF(NOT "${_language}" STREQUAL "")
+
+    GET_FILENAME_COMPONENT(_name ${_input} NAME)
+
+    # Copy .h to output dir
+    SET(PCH_INPUT "${_OUTPUT_DIR}/${_name}")
+    ADD_CUSTOM_COMMAND(OUTPUT ${PCH_INPUT}
+        COMMAND ${CMAKE_COMMAND} -E copy_if_different ${_input} ${PCH_INPUT}
+        DEPENDS ${_input}
+        COMMENT "[${_targetName}] Update precompiled header - done"
+    )
+
+    IF(CLANG)
+      SET(PCH_EXT "pth")
+    ELSE(CLANG)
+      SET(PCH_EXT "gch")
+    ENDIF(CLANG)
+
+    # For GCC and Clang, PCH needs to be in the same directory as .h
+    SET(PCH_OUTPUT "${_OUTPUT_DIR}/${_name}.${PCH_EXT}")
+  ENDIF(MSVC)
+ENDMACRO(PCH_SET_PRECOMPILED_HEADER_OUTPUT)
+
+# Add common flags
+MACRO(ADD_PRECOMPILED_HEADER_TO_TARGET _targetName)
+  GET_TARGET_PROPERTY(oldProps ${_targetName} COMPILE_FLAGS)
+
+  IF(${oldProps} MATCHES NOTFOUND)
+    SET(oldProps "")
+  ENDIF(${oldProps} MATCHES NOTFOUND)
+
+  IF(MSVC)
+    SET(_target_cflags "${oldProps} /Yu\"${PCH_INPUT}\" /FI\"${PCH_INPUT}\" /Fp\"${PCH_OUTPUT}\"")
+  ELSE(MSVC)
+    # for use with distcc and gcc >4.0.1 if preprocessed files are accessible
+    # on all remote machines set
+    # PCH_ADDITIONAL_COMPILER_FLAGS to -fpch-preprocess
+    SET(PCH_ADDITIONAL_COMPILER_FLAGS)
+    LIST(LENGTH PCH_ARCHS PCH_ARCHS_COUNT)
+
+    # If no arch is specified, create common flags
+    IF(PCH_ARCHS_COUNT LESS 2)
+      SET(PCH_ADDITIONAL_COMPILER_FLAGS "-include ${PCH_INPUT} ${PCH_ADDITIONAL_COMPILER_FLAGS}")
+    ENDIF(PCH_ARCHS_COUNT LESS 2)
+
+    IF(APPLE)
+      SET(PCH_ADDITIONAL_COMPILER_FLAGS "-fobjc-abi-version=2 -fobjc-legacy-dispatch -x objective-c++ ${PCH_ADDITIONAL_COMPILER_FLAGS}")
+    ENDIF(APPLE)
+    
+    IF(WITH_PCH_DEBUG)
+      SET(PCH_ADDITIONAL_COMPILER_FLAGS "-H ${PCH_ADDITIONAL_COMPILER_FLAGS}")
+    ENDIF(WITH_PCH_DEBUG)
+
+    SET(_target_cflags "${oldProps} ${PCH_ADDITIONAL_COMPILER_FLAGS} -Winvalid-pch")
+  ENDIF(MSVC)
+
+  SET_TARGET_PROPERTIES(${_targetName} PROPERTIES COMPILE_FLAGS ${_target_cflags})
 ENDMACRO(ADD_PRECOMPILED_HEADER_TO_TARGET)
 
-MACRO(ADD_PRECOMPILED_HEADER _targetName _inputh _inputcpp)
+# Add specific flags for an arch
+MACRO(ADD_PRECOMPILED_HEADER_TO_TARGET_ARCH _targetName _arch)
+  LIST(LENGTH PCH_ARCHS PCH_ARCHS_COUNT)
+
+  IF(PCH_ARCHS_COUNT GREATER 1)
+    GET_TARGET_PROPERTY(_FLAGS ${_targetName} COMPILE_FLAGS)
+
+    IF(${_FLAGS} MATCHES NOTFOUND)
+      SET(_FLAGS "")
+    ENDIF(${_FLAGS} MATCHES NOTFOUND)
+
+    SET(_FLAGS "${_FLAGS} -Xarch_${_arch} -include${PCH_INPUT}")
 
-	SET(_PCH_current_target ${_targetName})
+    SET_TARGET_PROPERTIES(${_targetName} PROPERTIES COMPILE_FLAGS ${_FLAGS})
+  ENDIF(PCH_ARCHS_COUNT GREATER 1)
+ENDMACRO(ADD_PRECOMPILED_HEADER_TO_TARGET_ARCH)
 
-	IF(NOT CMAKE_BUILD_TYPE)
-		MESSAGE(FATAL_ERROR
-			"This is the ADD_PRECOMPILED_HEADER macro. "
-			"You must set CMAKE_BUILD_TYPE!"
-		)
-	ENDIF(NOT CMAKE_BUILD_TYPE)
+MACRO(PCH_CREATE_TARGET _targetName _targetNamePCH)
+  ADD_CUSTOM_COMMAND(OUTPUT ${PCH_OUTPUT} COMMAND ${PCH_COMMAND} COMMENT "Generating ${_targetNamePCH}" DEPENDS ${PCH_INPUT})
+  ADD_CUSTOM_TARGET(${_targetNamePCH} DEPENDS ${PCH_INPUT} ${PCH_OUTPUT})
+  ADD_DEPENDENCIES(${_targetName} ${_targetNamePCH})
+ENDMACRO(PCH_CREATE_TARGET _targetName _inputh _inputcpp)
 
-	GET_PRECOMPILED_HEADER_OUTPUT( ${_targetName} ${_inputh} _output)
+MACRO(ADD_PRECOMPILED_HEADER _targetName _inputh _inputcpp)
+  SET(_PCH_current_target ${_targetName})
+
+  IF(NOT CMAKE_BUILD_TYPE)
+    MESSAGE(FATAL_ERROR
+      "This is the ADD_PRECOMPILED_HEADER macro. "
+      "You must set CMAKE_BUILD_TYPE!"
+    )
+  ENDIF(NOT CMAKE_BUILD_TYPE)
 
-	GET_TARGET_PROPERTY(_targetType ${_PCH_current_target} TYPE)
+  PCH_SET_COMPILE_FLAGS(${_targetName})
 
-	# always build static library because it doesn't need linking
-	ADD_LIBRARY(${_targetName}_pch_dephelp STATIC ${_inputcpp})
+  IF(PCH_ARCHS)
+    SET(PCH_OUTPUTS)
+    FOREACH(_ARCH ${PCH_ARCHS})
+      STRING(TOUPPER "${_ARCH}" _UPPER_ARCH)
 
-	_PCH_GET_COMPILE_FLAGS(_compile_FLAGS)
+      PCH_SET_PRECOMPILED_HEADER_OUTPUT(${_targetName} ${_inputh} ${_ARCH} "")
+      LIST(APPEND PCH_OUTPUTS ${PCH_OUTPUT})
 
-	SET_SOURCE_FILES_PROPERTIES(${_inputh} PROPERTIES GENERATED 1)
+      PCH_SET_COMPILE_COMMAND(${_inputcpp} "${PCH_ARCH_${_UPPER_ARCH}_FLAGS};${PCH_FLAGS}")
+      PCH_CREATE_TARGET(${_targetName} ${_targetName}_pch_${_ARCH})
 
-	_PCH_GET_COMPILE_COMMAND(_command  ${_inputh} ${_inputcpp} ${_output})
+      ADD_PRECOMPILED_HEADER_TO_TARGET_ARCH(${_targetName} ${_ARCH})
+    ENDFOREACH(_ARCH)
+  ELSE(PCH_ARCHS)
+    PCH_SET_PRECOMPILED_HEADER_OUTPUT(${_targetName} ${_inputh} "" "")
+    LIST(APPEND PCH_OUTPUTS ${PCH_OUTPUT})
 
-	ADD_CUSTOM_COMMAND(
-		OUTPUT ${_output}
-		COMMAND ${_command}
-		DEPENDS ${_inputh} ${_targetName}_pch_dephelp
-	)
+    PCH_SET_COMPILE_COMMAND(${_inputcpp} "${PCH_FLAGS}")
+    PCH_CREATE_TARGET(${_targetName} ${_targetName}_pch)
+  ENDIF(PCH_ARCHS)
 
-	ADD_PRECOMPILED_HEADER_TO_TARGET(${_targetName} ${_inputh} ${_output})
+  ADD_PRECOMPILED_HEADER_TO_TARGET(${_targetName})
+
+  SET_DIRECTORY_PROPERTIES(PROPERTIES ADDITIONAL_MAKE_CLEAN_FILES "${PCH_OUTPUTS}")
 ENDMACRO(ADD_PRECOMPILED_HEADER)
 
 # Macro to move PCH creation file to the front of files list
+# or remove .cpp from library/executable to avoid warning
 MACRO(FIX_PRECOMPILED_HEADER _files _pch)
-	# Remove .cpp creating PCH from the list
-	LIST(REMOVE_ITEM ${_files} ${_pch})
-	# Prepend .cpp creating PCH to the list
-	LIST(INSERT ${_files} 0 ${_pch})
+  # Remove .cpp creating PCH from the list
+  LIST(REMOVE_ITEM ${_files} ${_pch})
+  IF(MSVC)
+    # Prepend .cpp creating PCH to the list
+    LIST(INSERT ${_files} 0 ${_pch})
+  ENDIF(MSVC)
 ENDMACRO(FIX_PRECOMPILED_HEADER)
 
 MACRO(ADD_NATIVE_PRECOMPILED_HEADER _targetName _inputh _inputcpp)
-	SET(PCH_METHOD 0)
-
-	# 0 => creating a new target for PCH, works for all makefiles
-	# 1 => setting PCH for VC++ project, works for VC++ projects
-	# 2 => setting PCH for XCode project, works for XCode projects
-	IF(CMAKE_GENERATOR MATCHES "Visual Studio")
-		SET(PCH_METHOD 1)
-	ELSEIF(CMAKE_GENERATOR MATCHES "NMake Makefiles" AND MFC_FOUND AND CMAKE_MFC_FLAG)
-		# To fix a bug with MFC
-		# Don't forget to use FIX_PRECOMPILED_HEADER before creating the target
-#		SET(PCH_METHOD 1)
-	ELSEIF(CMAKE_GENERATOR MATCHES "Xcode")
-		SET(PCH_METHOD 2)
-	ENDIF(CMAKE_GENERATOR MATCHES "Visual Studio")
-
-	IF(PCH_METHOD EQUAL 1)
-		# Auto include the precompile (useful for moc processing, since the use of
-		# precompiled is specified at the target level
-		# and I don't want to specifiy /F- for each moc/res/ui generated files (using Qt)
-
-		GET_TARGET_PROPERTY(oldProps ${_targetName} COMPILE_FLAGS)
-		IF(${oldProps} MATCHES NOTFOUND)
-			SET(oldProps "")
-		ENDIF(${oldProps} MATCHES NOTFOUND)
-
-		SET(newProperties "${oldProps} /Yu\"${_inputh}\" /FI\"${_inputh}\"")
-		SET_TARGET_PROPERTIES(${_targetName} PROPERTIES COMPILE_FLAGS "${newProperties}")
-
-		#also inlude ${oldProps} to have the same compile options
-		SET_SOURCE_FILES_PROPERTIES(${_inputcpp} PROPERTIES COMPILE_FLAGS "${oldProps} /Yc\"${_inputh}\"")
-	ELSEIF(PCH_METHOD EQUAL 2)
-		# For Xcode, cmake needs my patch to process
-		# GCC_PREFIX_HEADER and GCC_PRECOMPILE_PREFIX_HEADER as target properties
-
-		GET_TARGET_PROPERTY(oldProps ${_targetName} COMPILE_FLAGS)
-		IF(${oldProps} MATCHES NOTFOUND)
-			SET(oldProps "")
-		ENDIF(${oldProps} MATCHES NOTFOUND)
-
-		# When buiding out of the tree, precompiled may not be located
-		# Use full path instead.
-		GET_FILENAME_COMPONENT(fullPath ${_inputh} ABSOLUTE)
-
-		SET_TARGET_PROPERTIES(${_targetName} PROPERTIES XCODE_ATTRIBUTE_GCC_PREFIX_HEADER "${fullPath}")
-		SET_TARGET_PROPERTIES(${_targetName} PROPERTIES XCODE_ATTRIBUTE_GCC_PRECOMPILE_PREFIX_HEADER "YES")
-	ELSE(PCH_METHOD EQUAL 1)
-		#Fallback to the "old" precompiled suppport
-		ADD_PRECOMPILED_HEADER(${_targetName} ${_inputh} ${_inputcpp})
-	ENDIF(PCH_METHOD EQUAL 1)
-
+  IF(NOT PCHSupport_FOUND)
+    MESSAGE(STATUS "PCH disabled because compiler doesn't support them")
+    RETURN()
+  ENDIF(NOT PCHSupport_FOUND)
+
+  # 0 => creating a new target for PCH, works for all makefiles
+  # 1 => setting PCH for VC++ project, works for VC++ projects
+  # 2 => setting PCH for XCode project, works for XCode projects
+  IF(CMAKE_GENERATOR MATCHES "Visual Studio")
+    SET(PCH_METHOD 1)
+  ELSEIF(CMAKE_GENERATOR MATCHES "NMake Makefiles" AND MFC_FOUND AND CMAKE_MFC_FLAG)
+    # To fix a bug with MFC
+    # Don't forget to use FIX_PRECOMPILED_HEADER before creating the target
+#    SET(PCH_METHOD 1)
+  ELSEIF(CMAKE_GENERATOR MATCHES "Xcode")
+    SET(PCH_METHOD 2)
+  ELSE(CMAKE_GENERATOR MATCHES "Visual Studio")
+    SET(PCH_METHOD 0)
+  ENDIF(CMAKE_GENERATOR MATCHES "Visual Studio")
+
+  IF(PCH_METHOD EQUAL 1)
+    # Auto include the precompile (useful for moc processing, since the use of
+    # precompiled is specified at the target level
+    # and I don't want to specifiy /F- for each moc/res/ui generated files (using Qt)
+
+    GET_TARGET_PROPERTY(oldProps ${_targetName} COMPILE_FLAGS)
+    IF(${oldProps} MATCHES NOTFOUND)
+      SET(oldProps "")
+    ENDIF(${oldProps} MATCHES NOTFOUND)
+
+    SET(newProperties "${oldProps} /Yu\"${_inputh}\" /FI\"${_inputh}\"")
+    SET_TARGET_PROPERTIES(${_targetName} PROPERTIES COMPILE_FLAGS "${newProperties}")
+
+    #also inlude ${oldProps} to have the same compile options
+    SET_SOURCE_FILES_PROPERTIES(${_inputcpp} PROPERTIES COMPILE_FLAGS "${oldProps} /Yc\"${_inputh}\"")
+  ELSEIF(PCH_METHOD EQUAL 2)
+    # For Xcode, cmake needs my patch to process
+    # GCC_PREFIX_HEADER and GCC_PRECOMPILE_PREFIX_HEADER as target properties
+
+    # When buiding out of the tree, precompiled may not be located
+    # Use full path instead.
+    GET_FILENAME_COMPONENT(fullPath ${_inputh} ABSOLUTE)
+
+    SET_TARGET_PROPERTIES(${_targetName} PROPERTIES XCODE_ATTRIBUTE_GCC_PREFIX_HEADER "${fullPath}")
+    SET_TARGET_PROPERTIES(${_targetName} PROPERTIES XCODE_ATTRIBUTE_GCC_PRECOMPILE_PREFIX_HEADER "YES")
+  ELSE(PCH_METHOD EQUAL 1)
+    #Fallback to the "old" precompiled suppport
+    ADD_PRECOMPILED_HEADER(${_targetName} ${_inputh} ${_inputcpp})
+  ENDIF(PCH_METHOD EQUAL 1)
+
+  IF(TARGET ${_targetName}_static)
+    ADD_NATIVE_PRECOMPILED_HEADER(${_targetName}_static ${_inputh} ${_inputcpp})
+  ENDIF(TARGET ${_targetName}_static)
 ENDMACRO(ADD_NATIVE_PRECOMPILED_HEADER)