diff options
author | bubnikv <bubnikv@gmail.com> | 2018-10-29 18:01:26 +0300 |
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committer | bubnikv <bubnikv@gmail.com> | 2018-10-29 18:01:26 +0300 |
commit | 5377304b0ca1b29954c44af0b0ecb6cea54e2ebf (patch) | |
tree | 0720d00c9c9200951746566434e90437f467387d /cmake | |
parent | 35d984b812c1a34d324597403dd229801484f18e (diff) |
Precompiled headers on Visual Studio & GCC, with the highest hopes
that it will not break the build server.
Diffstat (limited to 'cmake')
-rw-r--r-- | cmake/modules/PrecompiledHeader.cmake | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/cmake/modules/PrecompiledHeader.cmake b/cmake/modules/PrecompiledHeader.cmake new file mode 100644 index 000000000..1e578d261 --- /dev/null +++ b/cmake/modules/PrecompiledHeader.cmake @@ -0,0 +1,214 @@ +# Function for setting up precompiled headers. Usage: +# +# add_library/executable(target +# pchheader.c pchheader.cpp pchheader.h) +# +# add_precompiled_header(target pchheader.h +# [FORCEINCLUDE] +# [SOURCE_C pchheader.c] +# [SOURCE_CXX pchheader.cpp]) +# +# Options: +# +# FORCEINCLUDE: Add compiler flags to automatically include the +# pchheader.h from every source file. Works with both GCC and +# MSVC. This is recommended. +# +# SOURCE_C/CXX: Specifies the .c/.cpp source file that includes +# pchheader.h for generating the pre-compiled header +# output. Defaults to pchheader.c. Only required for MSVC. +# +# Caveats: +# +# * Its not currently possible to use the same precompiled-header in +# more than a single target in the same directory (No way to set +# the source file properties differently for each target). +# +# * MSVC: A source file with the same name as the header must exist +# and be included in the target (E.g. header.cpp). Name of file +# can be changed using the SOURCE_CXX/SOURCE_C options. +# +# License: +# +# Copyright (C) 2009-2017 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') 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. + +include(CMakeParseArguments) + +macro(combine_arguments _variable) + set(_result "") + foreach(_element ${${_variable}}) + set(_result "${_result} \"${_element}\"") + endforeach() + string(STRIP "${_result}" _result) + set(${_variable} "${_result}") +endmacro() + +function(export_all_flags _filename) + set(_include_directories "$<TARGET_PROPERTY:${_target},INCLUDE_DIRECTORIES>") + set(_compile_definitions "$<TARGET_PROPERTY:${_target},COMPILE_DEFINITIONS>") + set(_compile_flags "$<TARGET_PROPERTY:${_target},COMPILE_FLAGS>") + set(_compile_options "$<TARGET_PROPERTY:${_target},COMPILE_OPTIONS>") + set(_include_directories "$<$<BOOL:${_include_directories}>:-I$<JOIN:${_include_directories},\n-I>\n>") + set(_compile_definitions "$<$<BOOL:${_compile_definitions}>:-D$<JOIN:${_compile_definitions},\n-D>\n>") + set(_compile_flags "$<$<BOOL:${_compile_flags}>:$<JOIN:${_compile_flags},\n>\n>") + set(_compile_options "$<$<BOOL:${_compile_options}>:$<JOIN:${_compile_options},\n>\n>") + file(GENERATE OUTPUT "${_filename}" CONTENT "${_compile_definitions}${_include_directories}${_compile_flags}${_compile_options}\n") +endfunction() + +function(add_precompiled_header _target _input) + cmake_parse_arguments(_PCH "FORCEINCLUDE" "SOURCE_CXX;SOURCE_C" "" ${ARGN}) + + get_filename_component(_input_we ${_input} NAME_WE) + if(NOT _PCH_SOURCE_CXX) + set(_PCH_SOURCE_CXX "${_input_we}.cpp") + endif() + if(NOT _PCH_SOURCE_C) + set(_PCH_SOURCE_C "${_input_we}.c") + endif() + + if(MSVC) + set(_pch_cxx_pch "${CMAKE_CFG_INTDIR}/cxx_${_input_we}.pch") + set(_pch_c_pch "${CMAKE_CFG_INTDIR}/c_${_input_we}.pch") + + get_target_property(sources ${_target} SOURCES) + foreach(_source ${sources}) + set(_pch_compile_flags "") + if(_source MATCHES \\.\(cc|cxx|cpp|c\)$) + if(_source MATCHES \\.\(cpp|cxx|cc\)$) + set(_pch_header "${_input}") + set(_pch "${_pch_cxx_pch}") + else() + set(_pch_header "${_input}") + set(_pch "${_pch_c_pch}") + endif() + + if(_source STREQUAL "${_PCH_SOURCE_CXX}") + set(_pch_compile_flags "${_pch_compile_flags} \"/Fp${_pch_cxx_pch}\" \"/Yc${_input}\"") + set(_pch_source_cxx_found TRUE) + set_source_files_properties("${_source}" PROPERTIES OBJECT_OUTPUTS "${_pch_cxx_pch}") + elseif(_source STREQUAL "${_PCH_SOURCE_C}") + set(_pch_compile_flags "${_pch_compile_flags} \"/Fp${_pch_c_pch}\" \"/Yc${_input}\"") + set(_pch_source_c_found TRUE) + set_source_files_properties("${_source}" PROPERTIES OBJECT_OUTPUTS "${_pch_c_pch}") + else() + if(_source MATCHES \\.\(cpp|cxx|cc\)$) + set(_pch_compile_flags "${_pch_compile_flags} \"/Fp${_pch_cxx_pch}\" \"/Yu${_input}\"") + set(_pch_source_cxx_needed TRUE) + set_source_files_properties("${_source}" PROPERTIES OBJECT_DEPENDS "${_pch_cxx_pch}") + else() + set(_pch_compile_flags "${_pch_compile_flags} \"/Fp${_pch_c_pch}\" \"/Yu${_input}\"") + set(_pch_source_c_needed TRUE) + set_source_files_properties("${_source}" PROPERTIES OBJECT_DEPENDS "${_pch_c_pch}") + endif() + if(_PCH_FORCEINCLUDE) + set(_pch_compile_flags "${_pch_compile_flags} /FI${_input}") + endif(_PCH_FORCEINCLUDE) + endif() + + get_source_file_property(_object_depends "${_source}" OBJECT_DEPENDS) + if(NOT _object_depends) + set(_object_depends) + endif() + if(_PCH_FORCEINCLUDE) + list(APPEND _object_depends "${CMAKE_CURRENT_SOURCE_DIR}/${_pch_header}") + endif() + + set_source_files_properties(${_source} PROPERTIES + COMPILE_FLAGS "${_pch_compile_flags}" + OBJECT_DEPENDS "${_object_depends}") + endif() + endforeach() + + if(_pch_source_cxx_needed AND NOT _pch_source_cxx_found) + message(FATAL_ERROR "A source file ${_PCH_SOURCE_CXX} for ${_input} is required for MSVC builds. Can be set with the SOURCE_CXX option.") + endif() + if(_pch_source_c_needed AND NOT _pch_source_c_found) + message(FATAL_ERROR "A source file ${_PCH_SOURCE_C} for ${_input} is required for MSVC builds. Can be set with the SOURCE_C option.") + endif() + endif(MSVC) + + if(CMAKE_COMPILER_IS_GNUCXX) + get_filename_component(_name ${_input} NAME) + set(_pch_header "${CMAKE_CURRENT_SOURCE_DIR}/${_input}") + set(_pch_binary_dir "${CMAKE_CURRENT_BINARY_DIR}/${_target}_pch") + set(_pchfile "${_pch_binary_dir}/${_input}") + set(_outdir "${CMAKE_CURRENT_BINARY_DIR}/${_target}_pch/${_name}.gch") + file(MAKE_DIRECTORY "${_outdir}") + set(_output_cxx "${_outdir}/.c++") + set(_output_c "${_outdir}/.c") + + set(_pch_flags_file "${_pch_binary_dir}/compile_flags.rsp") + export_all_flags("${_pch_flags_file}") + set(_compiler_FLAGS "@${_pch_flags_file}") + add_custom_command( + OUTPUT "${_pchfile}" + COMMAND "${CMAKE_COMMAND}" -E copy "${_pch_header}" "${_pchfile}" + DEPENDS "${_pch_header}" + COMMENT "Updating ${_name}") + add_custom_command( + OUTPUT "${_output_cxx}" + COMMAND "${CMAKE_CXX_COMPILER}" ${_compiler_FLAGS} -x c++-header -o "${_output_cxx}" "${_pchfile}" + DEPENDS "${_pchfile}" "${_pch_flags_file}" + COMMENT "Precompiling ${_name} for ${_target} (C++)") + add_custom_command( + OUTPUT "${_output_c}" + COMMAND "${CMAKE_C_COMPILER}" ${_compiler_FLAGS} -x c-header -o "${_output_c}" "${_pchfile}" + DEPENDS "${_pchfile}" "${_pch_flags_file}" + COMMENT "Precompiling ${_name} for ${_target} (C)") + + get_property(_sources TARGET ${_target} PROPERTY SOURCES) + foreach(_source ${_sources}) + set(_pch_compile_flags "") + + if(_source MATCHES \\.\(cc|cxx|cpp|c\)$) + get_source_file_property(_pch_compile_flags "${_source}" COMPILE_FLAGS) + if(NOT _pch_compile_flags) + set(_pch_compile_flags) + endif() + separate_arguments(_pch_compile_flags) + list(APPEND _pch_compile_flags -Winvalid-pch) + if(_PCH_FORCEINCLUDE) + list(APPEND _pch_compile_flags -include "${_pchfile}") + else(_PCH_FORCEINCLUDE) + list(APPEND _pch_compile_flags "-I${_pch_binary_dir}") + endif(_PCH_FORCEINCLUDE) + + get_source_file_property(_object_depends "${_source}" OBJECT_DEPENDS) + if(NOT _object_depends) + set(_object_depends) + endif() + list(APPEND _object_depends "${_pchfile}") + if(_source MATCHES \\.\(cc|cxx|cpp\)$) + list(APPEND _object_depends "${_output_cxx}") + else() + list(APPEND _object_depends "${_output_c}") + endif() + + combine_arguments(_pch_compile_flags) + set_source_files_properties(${_source} PROPERTIES + COMPILE_FLAGS "${_pch_compile_flags}" + OBJECT_DEPENDS "${_object_depends}") + endif() + endforeach() + endif(CMAKE_COMPILER_IS_GNUCXX) +endfunction() |