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# Macro for setting up precompiled headers. Usage: | |
# | |
# add_precompiled_header(target header.h [FORCEINCLUDE]) | |
# | |
# MSVC: A source file with the same name as the header must exist and | |
# be included in the target (E.g. header.cpp). | |
# | |
# MSVC: Add FORCEINCLUDE to automatically include the precompiled | |
# header file from every source file. | |
# | |
# GCC: The precompiled header is always automatically included from | |
# every header file. | |
# | |
# Copyright (C) 2009-2013 Lars Christensen <larsch@belunktum.dk> | |
# | |
# Permission is hereby granted, free of charge, to any person | |
# obtaining a copy of this software and associated documentation files | |
# (the ‘Software’), to deal in the Software without restriction, | |
# including without limitation the rights to use, copy, modify, merge, | |
# publish, distribute, sublicense, and/or sell copies of the Software, | |
# and to permit persons to whom the Software is furnished to do so, | |
# subject to the following conditions: | |
# | |
# The above copyright notice and this permission notice shall be | |
# included in all copies or substantial portions of the Software. | |
# | |
# THE SOFTWARE IS PROVIDED ‘AS IS’, WITHOUT WARRANTY OF ANY KIND, | |
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
# SOFTWARE. | |
MACRO(ADD_PRECOMPILED_HEADER _targetName _input) | |
GET_FILENAME_COMPONENT(_inputWe ${_input} NAME_WE) | |
SET(pch_source ${_inputWe}.cpp) | |
FOREACH(arg ${ARGN}) | |
IF(arg STREQUAL FORCEINCLUDE) | |
SET(FORCEINCLUDE ON) | |
ELSE(arg STREQUAL FORCEINCLUDE) | |
SET(FORCEINCLUDE OFF) | |
ENDIF(arg STREQUAL FORCEINCLUDE) | |
ENDFOREACH(arg) | |
IF(MSVC) | |
GET_TARGET_PROPERTY(sources ${_targetName} SOURCES) | |
SET(_sourceFound FALSE) | |
FOREACH(_source ${sources}) | |
SET(PCH_COMPILE_FLAGS "") | |
IF(_source MATCHES \\.\(cc|cxx|cpp\)$) | |
GET_FILENAME_COMPONENT(_sourceWe ${_source} NAME_WE) | |
IF(_sourceWe STREQUAL ${_inputWe}) | |
SET(PCH_COMPILE_FLAGS "${PCH_COMPILE_FLAGS} /Yc${_input}") | |
SET(_sourceFound TRUE) | |
ELSE(_sourceWe STREQUAL ${_inputWe}) | |
SET(PCH_COMPILE_FLAGS "${PCH_COMPILE_FLAGS} /Yu${_input}") | |
IF(FORCEINCLUDE) | |
SET(PCH_COMPILE_FLAGS "${PCH_COMPILE_FLAGS} /FI${_input}") | |
ENDIF(FORCEINCLUDE) | |
ENDIF(_sourceWe STREQUAL ${_inputWe}) | |
SET_SOURCE_FILES_PROPERTIES(${_source} PROPERTIES COMPILE_FLAGS "${PCH_COMPILE_FLAGS}") | |
ENDIF(_source MATCHES \\.\(cc|cxx|cpp\)$) | |
ENDFOREACH() | |
IF(NOT _sourceFound) | |
MESSAGE(FATAL_ERROR "A source file for ${_input} was not found. Required for MSVC builds.") | |
ENDIF(NOT _sourceFound) | |
ENDIF(MSVC) | |
IF(CMAKE_COMPILER_IS_GNUCXX) | |
GET_FILENAME_COMPONENT(_name ${_input} NAME) | |
SET(_source "${CMAKE_CURRENT_SOURCE_DIR}/${_input}") | |
SET(_outdir "${CMAKE_CURRENT_BINARY_DIR}/${_name}.gch") | |
MAKE_DIRECTORY(${_outdir}) | |
SET(_output "${_outdir}/.c++") | |
STRING(TOUPPER "CMAKE_CXX_FLAGS_${CMAKE_BUILD_TYPE}" _flags_var_name) | |
SET(_compiler_FLAGS ${${_flags_var_name}}) | |
GET_DIRECTORY_PROPERTY(_directory_flags INCLUDE_DIRECTORIES) | |
FOREACH(item ${_directory_flags}) | |
LIST(APPEND _compiler_FLAGS "-I${item}") | |
ENDFOREACH(item) | |
GET_DIRECTORY_PROPERTY(_directory_flags DEFINITIONS) | |
LIST(APPEND _compiler_FLAGS ${_directory_flags}) | |
SEPARATE_ARGUMENTS(_compiler_FLAGS) | |
MESSAGE("${CMAKE_CXX_COMPILER} -DPCHCOMPILE ${_compiler_FLAGS} -x c++-header -o {_output} ${_source}") | |
ADD_CUSTOM_COMMAND( | |
OUTPUT ${_output} | |
COMMAND ${CMAKE_CXX_COMPILER} ${_compiler_FLAGS} -x c++-header -o ${_output} ${_source} | |
DEPENDS ${_source} ) | |
ADD_CUSTOM_TARGET(${_targetName}_gch DEPENDS ${_output}) | |
ADD_DEPENDENCIES(${_targetName} ${_targetName}_gch) | |
SET_TARGET_PROPERTIES(${_targetName} PROPERTIES COMPILE_FLAGS "-include ${_name} -Winvalid-pch") | |
ENDIF(CMAKE_COMPILER_IS_GNUCXX) | |
ENDMACRO() |
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