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PCHSupport.cmake
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# - Try to find precompiled headers support for GCC 3.4 and 4.x (and MSVC)
# Once done this will define:
#
# Variable:
# PCHSupport_FOUND
#
# ADD_PRECOMPILED_HEADER _targetName _inputh _inputcpp
# ADD_PRECOMPILED_HEADER_TO_TARGET _targetName _input _pch_output_to_use
# ADD_NATIVE_PRECOMPILED_HEADER _targetName _inputh _inputcpp
cmake_policy(PUSH)
cmake_policy(SET CMP0007 OLD)
IF(CMAKE_COMPILER_IS_GNUCXX)
EXEC_PROGRAM(
${CMAKE_CXX_COMPILER}
ARGS ${CMAKE_CXX_COMPILER_ARG1} -dumpversion
OUTPUT_VARIABLE gcc_compiler_version)
IF(gcc_compiler_version MATCHES "4\\.[0-9]\\.[0-9]")
SET(PCHSupport_FOUND TRUE)
ELSE(gcc_compiler_version MATCHES "4\\.[0-9]\\.[0-9]")
IF(gcc_compiler_version MATCHES "3\\.4\\.[0-9]")
SET(PCHSupport_FOUND TRUE)
ENDIF(gcc_compiler_version MATCHES "3\\.4\\.[0-9]")
ENDIF(gcc_compiler_version MATCHES "4\\.[0-9]\\.[0-9]")
SET(_PCH_include_prefix "-I")
ELSE(CMAKE_COMPILER_IS_GNUCXX)
IF(WIN32)
SET(PCHSupport_FOUND TRUE) # for experimental msvc support
SET(_PCH_include_prefix "/I")
ELSE(WIN32)
SET(PCHSupport_FOUND FALSE)
ENDIF(WIN32)
ENDIF(CMAKE_COMPILER_IS_GNUCXX)
MACRO(_PCH_GET_COMPILE_FLAGS _out_compile_flags)
STRING(TOUPPER "CMAKE_CXX_FLAGS_${CMAKE_BUILD_TYPE}" _flags_var_name)
SET(${_out_compile_flags} ${${_flags_var_name}} )
IF(CMAKE_COMPILER_IS_GNUCXX)
GET_TARGET_PROPERTY(_targetType ${_PCH_current_target} TYPE)
IF(${_targetType} STREQUAL SHARED_LIBRARY OR ${_targetType} STREQUAL MODULE_LIBRARY)
LIST(APPEND ${_out_compile_flags} "-fPIC")
ENDIF(${_targetType} STREQUAL SHARED_LIBRARY OR ${_targetType} STREQUAL MODULE_LIBRARY)
ENDIF(CMAKE_COMPILER_IS_GNUCXX)
GET_DIRECTORY_PROPERTY(DIRINC INCLUDE_DIRECTORIES )
FOREACH(item ${DIRINC})
LIST(APPEND ${_out_compile_flags} " ${_PCH_include_prefix}\"${item}\"")
ENDFOREACH(item)
# Required for CMake 2.6
SET(GLOBAL_DEFINITIONS "")
GET_DIRECTORY_PROPERTY(DEFINITIONS COMPILE_DEFINITIONS)
FOREACH(item ${DEFINITIONS})
IF(CMAKE_COMPILER_IS_GNUCXX)
LIST(APPEND GLOBAL_DEFINITIONS -D${item})
ELSE()
LIST(APPEND GLOBAL_DEFINITIONS /D${item})
ENDIF()
ENDFOREACH(item)
STRING(TOUPPER "COMPILE_DEFINITIONS_${CMAKE_BUILD_TYPE}" _compile_definitions_build_type)
GET_DIRECTORY_PROPERTY(DEFINITIONS ${_compile_definitions_build_type})
FOREACH(item ${DEFINITIONS})
IF(CMAKE_COMPILER_IS_GNUCXX)
LIST(APPEND GLOBAL_DEFINITIONS -D${item})
ELSE()
LIST(APPEND GLOBAL_DEFINITIONS /D${item})
ENDIF()
ENDFOREACH(item)
LIST(APPEND ${_out_compile_flags} ${GLOBAL_DEFINITIONS})
LIST(APPEND ${_out_compile_flags} ${CMAKE_CXX_FLAGS})
if(MSVC AND ${CMAKE_BUILD_TYPE} STREQUAL "Debug")
LIST(APPEND ${_out_compile_flags} "/Gd")
endif()
# Format definitions and remove duplicates
SEPARATE_ARGUMENTS(${_out_compile_flags})
LIST(REMOVE_DUPLICATES ${_out_compile_flags})
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 ${EXECUTABLE_OUTPUT_PATH})
ELSEIF(${_targetType} STREQUAL STATIC_LIBRARY)
SET(_targetOutput ${CMAKE_ARCHIVE_OUTPUT_DIRECTORY})
ELSE(${_targetType} STREQUAL SHARED_LIBRARY)
SET(_targetOutput ${LIBRARY_OUTPUT_PATH})
ENDIF()
SET(_targetOutput ${_targetOutput}/${CMAKE_BUILD_TYPE})
# 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 ${CMAKE_CXX_COMPILER_ARG1})
ELSE(CMAKE_CXX_COMPILER_ARG1)
SET(pchsupport_compiler_cxx_arg1 "")
ENDIF(CMAKE_CXX_COMPILER_ARG1)
IF(CMAKE_COMPILER_IS_GNUCXX)
SET(${out_command}
${CMAKE_CXX_COMPILER} ${pchsupport_compiler_cxx_arg1} ${_compile_FLAGS} -x c++-header -o ${_output} -c ${_input}
)
ELSE(CMAKE_COMPILER_IS_GNUCXX)
_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}\"
)
ENDIF(CMAKE_COMPILER_IS_GNUCXX)
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(CMAKE_COMPILER_IS_GNUCXX)
# 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
get_filename_component(_input_stripped_from_path ${_input} NAME)
SET(_target_cflags "${oldProps} ${PCH_ADDITIONAL_COMPILER_FLAGS}-include ${_input_stripped_from_path} -Winvalid-pch")
ELSE(CMAKE_COMPILER_IS_GNUCXX)
IF(MSVC)
SET(_target_cflags "${oldProps} /Yu\"${_input}\" /FI\"${_input}\" /Fp\"${_pch_output_to_use}\"")
ENDIF(MSVC)
ENDIF(CMAKE_COMPILER_IS_GNUCXX)
SET_TARGET_PROPERTIES(${_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})
ENDMACRO(ADD_PRECOMPILED_HEADER_TO_TARGET)
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_PRECOMPILED_HEADER_OUTPUT( ${_targetName} ${_inputh} _output)
GET_TARGET_PROPERTY(_targetType ${_PCH_current_target} TYPE)
# always build static library because it doesn't need linking
ADD_LIBRARY(${_targetName}_pch_dephelp STATIC ${_inputcpp})
_PCH_GET_COMPILE_FLAGS(_compile_FLAGS)
SET_SOURCE_FILES_PROPERTIES(${_inputh} PROPERTIES GENERATED 1)
_PCH_GET_COMPILE_COMMAND(_command ${_inputh} ${_inputcpp} ${_output})
ADD_CUSTOM_COMMAND(
OUTPUT ${_output}
COMMAND ${_command}
DEPENDS ${_inputh} ${_targetName}_pch_dephelp
)
ADD_PRECOMPILED_HEADER_TO_TARGET(${_targetName} ${_inputh} ${_output})
IF(MSVC)
GET_FILENAME_COMPONENT(_name ${_inputcpp} NAME_WE)
SET(_output_obj "${CMAKE_CURRENT_BINARY_DIR}/${_name}.obj")
SET(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} ${_output_obj}")
endif()
ENDMACRO(ADD_PRECOMPILED_HEADER)
MACRO(ADD_NATIVE_PRECOMPILED_HEADER _targetName _inputh _inputcpp)
IF(CMAKE_GENERATOR MATCHES Visual*)
# 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}\"")
ELSE(CMAKE_GENERATOR MATCHES Visual*)
IF(CMAKE_GENERATOR MATCHES Xcode)
# 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(CMAKE_GENERATOR MATCHES Xcode)
#Fallback to the "old" precompiled suppport
ADD_PRECOMPILED_HEADER(${_targetName} ${_inputh} ${_inputcpp})
ENDIF(CMAKE_GENERATOR MATCHES Xcode)
ENDIF(CMAKE_GENERATOR MATCHES Visual*)
ENDMACRO(ADD_NATIVE_PRECOMPILED_HEADER)
cmake_policy(POP)