diff options
Diffstat (limited to 'cmake/PCH.cmake')
| -rw-r--r-- | cmake/PCH.cmake | 315 |
1 files changed, 315 insertions, 0 deletions
diff --git a/cmake/PCH.cmake b/cmake/PCH.cmake new file mode 100644 index 00000000000..e7da9349cb6 --- /dev/null +++ b/cmake/PCH.cmake @@ -0,0 +1,315 @@ +# +# This file is for CMake 2.6 +# +# - Try to find precompiled headers support for GCC 3.4 and 4.x +# Once done this will define: +# +# Variable: +# PCHSupport_FOUND +# +# Macro: +# ADD_PRECOMPILED_HEADER _targetName _input _dowarn +# ADD_PRECOMPILED_HEADER_TO_TARGET _targetName _input _pch_output_to_use _dowarn +# ADD_NATIVE_PRECOMPILED_HEADER _targetName _input _dowarn +# GET_NATIVE_PRECOMPILED_HEADER _targetName _input + +IF(CMAKE_COMPILER_IS_GNUCXX) + + EXEC_PROGRAM( + ${CMAKE_CXX_COMPILER} + ARGS ${CMAKE_CXX_COMPILER_ARG1} -dumpversion + OUTPUT_VARIABLE gcc_compiler_version) + #MESSAGE("GCC Version: ${gcc_compiler_version}") + IF(gcc_compiler_version MATCHES "4\\.[0-9]\\.[0-9]") + SET(PCHSupport_FOUND TRUE) + ENDIF(gcc_compiler_version MATCHES "4\\.[0-9]\\.[0-9]") + + SET(_PCH_include_prefix "-I") + +ENDIF(CMAKE_COMPILER_IS_GNUCXX) + +MACRO(_PCH_GET_COMPILE_FLAGS _out_compile_flags) + + + STRING(TOUPPER "CMAKE_CXX_FLAGS_${CMAKE_BUILD_TYPE}" _flags_var_name) + SET(return_value ${${_flags_var_name}} ) + + IF(CMAKE_COMPILER_IS_GNUCXX) + + GET_TARGET_PROPERTY(_targetType ${_PCH_current_target} TYPE) + IF(${_targetType} STREQUAL SHARED_LIBRARY) + LIST(APPEND return_value "${return_value} -fPIC") + ENDIF(${_targetType} STREQUAL SHARED_LIBRARY) + + ENDIF(CMAKE_COMPILER_IS_GNUCXX) + + GET_DIRECTORY_PROPERTY(DIRINC INCLUDE_DIRECTORIES ) + FOREACH(item ${DIRINC}) + LIST(APPEND return_value "${_PCH_include_prefix}${item}") + ENDFOREACH(item) + + SET(_build_type "${CMAKE_BUILD_TYPE}") + + #MESSAGE(STATUS "build type: `${CMAKE_BUILD_TYPE}'") + + IF (NOT _build_type) + SET(_build_type "Debug") + ENDIF (NOT _build_type) + + string(TOUPPER ${_build_type} _build_type) + SET(_def_name "COMPILE_DEFINITIONS_${_build_type}") + GET_DIRECTORY_PROPERTY(_directory_flags ${_def_name}) + FOREACH(item ${_directory_flags}) + LIST(APPEND return_value "-D${item}") + ENDFOREACH(item) + GET_DIRECTORY_PROPERTY(_directory_flags COMPILE_DEFINITIONS) + LIST(APPEND ${_out_compile_flags} ${return_value}) + FOREACH(_def ${_directory_flags}) + LIST(APPEND ${_out_compile_flags} "-D${_def}") + ENDFOREACH(_def) + LIST(APPEND ${_out_compile_flags} ${CMAKE_CXX_FLAGS} ) + + SEPARATE_ARGUMENTS(${_out_compile_flags}) + +ENDMACRO(_PCH_GET_COMPILE_FLAGS) + +# +# +# + +MACRO(_PCH_WRITE_PCHDEP_CXX _targetName _include_file _dephelp) + + SET(${_dephelp} ${CMAKE_CURRENT_BINARY_DIR}/${_targetName}_pch_dephelp.cxx) + FILE(WRITE ${${_dephelp}} +"#include \"${_include_file}\" +int testfunction() +{ + return 0; +} +" + ) + +ENDMACRO(_PCH_WRITE_PCHDEP_CXX ) + +# +# +# + +MACRO(_PCH_GET_COMPILE_COMMAND out_command _input _output) + + FILE(TO_NATIVE_PATH ${_input} _native_input) + FILE(TO_NATIVE_PATH ${_output} _native_output) + + + IF(CMAKE_COMPILER_IS_GNUCXX) + SET(${out_command} + ${CMAKE_CXX_COMPILER} ${_compile_FLAGS} -x c++-header -o ${_output} ${_input} + ) + ENDIF(CMAKE_COMPILER_IS_GNUCXX) + +ENDMACRO(_PCH_GET_COMPILE_COMMAND ) + +# +# +# + +MACRO(_PCH_GET_TARGET_COMPILE_FLAGS _cflags _header_name _pch_path _dowarn ) + + FILE(TO_NATIVE_PATH ${_pch_path} _native_pch_path) + + IF(CMAKE_COMPILER_IS_GNUCXX) + # for use with distcc and gcc >4.0.1 if preprocessed files are accessible + # on all remote machines set + # PCH_ADDITIONAL_COMPILER_FLAGS to -fpch-preprocess + # if you want warnings for invalid header files (which is very inconvenient + # if you have different versions of the headers for different build types + # you may set _pch_dowarn + IF (_dowarn) + SET(${_cflags} "${PCH_ADDITIONAL_COMPILER_FLAGS} -include ${CMAKE_CURRENT_BINARY_DIR}/${_header_name} -Winvalid-pch " ) + ELSE (_dowarn) + SET(${_cflags} "${PCH_ADDITIONAL_COMPILER_FLAGS} -include ${CMAKE_CURRENT_BINARY_DIR}/${_header_name} " ) + ENDIF (_dowarn) + ELSE(CMAKE_COMPILER_IS_GNUCXX) + + set(${_cflags} "/Fp${_native_pch_path} /Yu${_header_name}" ) + + ENDIF(CMAKE_COMPILER_IS_GNUCXX) + +ENDMACRO(_PCH_GET_TARGET_COMPILE_FLAGS ) + +MACRO(GET_PRECOMPILED_HEADER_OUTPUT _targetName _input _output) + GET_FILENAME_COMPONENT(_name ${_input} NAME) + GET_FILENAME_COMPONENT(_path ${_input} PATH) + SET(_output "${CMAKE_CURRENT_BINARY_DIR}/${_name}.gch/${_targetName}_${CMAKE_BUILD_TYPE}.h++") +ENDMACRO(GET_PRECOMPILED_HEADER_OUTPUT _targetName _input) + + +MACRO(ADD_PRECOMPILED_HEADER_TO_TARGET _targetName _input _pch_output_to_use ) + + # to do: test whether compiler flags match between target _targetName + # and _pch_output_to_use + GET_FILENAME_COMPONENT(_name ${_input} NAME) + + IF( "${ARGN}" STREQUAL "0") + SET(_dowarn 0) + ELSE( "${ARGN}" STREQUAL "0") + SET(_dowarn 1) + ENDIF("${ARGN}" STREQUAL "0") + + + _PCH_GET_TARGET_COMPILE_FLAGS(_target_cflags ${_name} ${_pch_output_to_use} ${_dowarn}) + # MESSAGE("Add flags ${_target_cflags} to ${_targetName} " ) + SET_TARGET_PROPERTIES(${_targetName} + PROPERTIES + COMPILE_FLAGS ${_target_cflags} + ) + + ADD_CUSTOM_TARGET(pch_Generate_${_targetName} + DEPENDS ${_pch_output_to_use} + ) + + ADD_DEPENDENCIES(${_targetName} pch_Generate_${_targetName} ) + +ENDMACRO(ADD_PRECOMPILED_HEADER_TO_TARGET) + +MACRO(ADD_PRECOMPILED_HEADER _targetName _input) + + SET(_PCH_current_target ${_targetName}) + + IF(NOT CMAKE_BUILD_TYPE) + MESSAGE(FATAL_ERROR + "This is the ADD_PRECOMPILED_HEADER macro. " + "You must set CMAKE_BUILD_TYPE!" + ) + ENDIF(NOT CMAKE_BUILD_TYPE) + + IF( "${ARGN}" STREQUAL "0") + SET(_dowarn 0) + ELSE( "${ARGN}" STREQUAL "0") + SET(_dowarn 1) + ENDIF("${ARGN}" STREQUAL "0") + + + GET_FILENAME_COMPONENT(_name ${_input} NAME) + GET_FILENAME_COMPONENT(_path ${_input} PATH) + GET_PRECOMPILED_HEADER_OUTPUT( ${_targetName} ${_input} _output) + + GET_FILENAME_COMPONENT(_outdir ${_output} PATH ) + + GET_TARGET_PROPERTY(_targetType ${_PCH_current_target} TYPE) + _PCH_WRITE_PCHDEP_CXX(${_targetName} ${_input} _pch_dephelp_cxx) + + IF(${_targetType} STREQUAL SHARED_LIBRARY) + ADD_LIBRARY(${_targetName}_pch_dephelp SHARED ${_pch_dephelp_cxx} ) + ELSE(${_targetType} STREQUAL SHARED_LIBRARY) + ADD_LIBRARY(${_targetName}_pch_dephelp STATIC ${_pch_dephelp_cxx}) + ENDIF(${_targetType} STREQUAL SHARED_LIBRARY) + + FILE(MAKE_DIRECTORY ${_outdir}) + + _PCH_GET_COMPILE_FLAGS(_compile_FLAGS) + + #MESSAGE("_compile_FLAGS: ${_compile_FLAGS}") + #message("COMMAND ${CMAKE_CXX_COMPILER} ${_compile_FLAGS} -x c++-header -o ${_output} ${_input}") + SET_SOURCE_FILES_PROPERTIES(${CMAKE_CURRENT_BINARY_DIR}/${_name} PROPERTIES GENERATED 1) + ADD_CUSTOM_COMMAND( + OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${_name} + COMMAND ${CMAKE_COMMAND} -E copy ${_input} ${CMAKE_CURRENT_BINARY_DIR}/${_name} # ensure same directory! Required by gcc + DEPENDS ${_input} + ) + + #message("_command ${_input} ${_output}") + _PCH_GET_COMPILE_COMMAND(_command ${CMAKE_CURRENT_BINARY_DIR}/${_name} ${_output} ) + #message("${_command}") + + #message(${_input} ) + #message("_output ${_output}") + + ADD_CUSTOM_COMMAND( + OUTPUT ${_output} + COMMAND ${_command} + DEPENDS ${_input} ${CMAKE_CURRENT_BINARY_DIR}/${_name} ${_targetName}_pch_dephelp + ) + + + ADD_PRECOMPILED_HEADER_TO_TARGET(${_targetName} ${_input} ${_output} ${_dowarn}) +ENDMACRO(ADD_PRECOMPILED_HEADER) + + +# Generates the use of precompiled in a target, +# without using depency targets (2 extra for each target) +# Using Visual, must also add ${_targetName}_pch to sources +# Not needed by Xcode + +MACRO(GET_NATIVE_PRECOMPILED_HEADER _targetName _input) + + if(CMAKE_GENERATOR MATCHES Visual*) + + SET(_dummy_str "#include \"${_input}\"\n" + "// This is required to suppress LNK4221. Very annoying.\n" + "void *g_${_targetName}Dummy = 0\;\n") + + # Use of cxx extension for generated files (as Qt does) + SET(${_targetName}_pch ${CMAKE_CURRENT_BINARY_DIR}/${_targetName}_pch.cxx) + if(EXISTS ${${_targetName}_pch}) + # Check if contents is the same, if not rewrite + # todo + else(EXISTS ${${_targetName}_pch}) + FILE(WRITE ${${_targetName}_pch} ${_dummy_str}) + endif(EXISTS ${${_targetName}_pch}) + endif(CMAKE_GENERATOR MATCHES Visual*) + +ENDMACRO(GET_NATIVE_PRECOMPILED_HEADER) + + +MACRO(ADD_NATIVE_PRECOMPILED_HEADER _targetName _input) + + IF( "${ARGN}" STREQUAL "0") + SET(_dowarn 0) + ELSE( "${ARGN}" STREQUAL "0") + SET(_dowarn 1) + ENDIF("${ARGN}" STREQUAL "0") + + 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\"${_input}\" /FI\"${_input}\"") + SET_TARGET_PROPERTIES(${_targetName} PROPERTIES COMPILE_FLAGS "${newProperties}") + + #also inlude ${oldProps} to have the same compile options + SET_SOURCE_FILES_PROPERTIES(${${_targetName}_pch} PROPERTIES COMPILE_FLAGS "${oldProps} /Yc\"${_input}\"") + + 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 ${_input} ABSOLUTE) + + SET_TARGET_PROPERTIES(${_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} ${_input} ${_dowarn}) + endif(CMAKE_GENERATOR MATCHES Xcode) + endif(CMAKE_GENERATOR MATCHES Visual*) + +ENDMACRO(ADD_NATIVE_PRECOMPILED_HEADER) + |