166 lines
6.7 KiB
CMake
166 lines
6.7 KiB
CMake
##
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## Modified for Telegram Desktop project by Telegram Desktop authors.
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##
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# Function for setting up precompiled headers. Usage:
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#
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# add_library/executable(target
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# pchheader.c pchheader.cpp pchheader.h)
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#
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# add_precompiled_header(target pchheader.h
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# [FORCEINCLUDE]
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# [SOURCE_C pchheader.c]
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# [SOURCE_CXX pchheader.cpp])
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#
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# Options:
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#
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# FORCEINCLUDE: Add compiler flags to automatically include the
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# pchheader.h from every source file. Works with both GCC and
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# MSVC. This is recommended.
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#
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# SOURCE_C/CXX: Specifies the .c/.cpp source file that includes
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# pchheader.h for generating the pre-compiled header
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# output. Defaults to pchheader.c. Only required for MSVC.
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#
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# Caveats:
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#
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# * Its not currently possible to use the same precompiled-header in
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# more than a single target in the same directory (No way to set
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# the source file properties differently for each target).
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#
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# * MSVC: A source file with the same name as the header must exist
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# and be included in the target (E.g. header.cpp). Name of file
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# can be changed using the SOURCE_CXX/SOURCE_C options.
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#
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# License:
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#
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# Copyright (C) 2009-2013 Lars Christensen <larsch@belunktum.dk>
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#
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# Permission is hereby granted, free of charge, to any person
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# obtaining a copy of this software and associated documentation files
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# (the 'Software') deal in the Software without restriction,
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# including without limitation the rights to use, copy, modify, merge,
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# publish, distribute, sublicense, and/or sell copies of the Software,
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# and to permit persons to whom the Software is furnished to do so,
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# subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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include(CMakeParseArguments)
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macro(combine_arguments _variable)
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set(_result "")
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foreach(_element ${${_variable}})
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set(_result "${_result} \"${_element}\"")
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endforeach()
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string(STRIP "${_result}" _result)
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set(${_variable} "${_result}")
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endmacro()
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function(export_all_flags _filename _source_name_for_flags)
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set(_include_directories "$<TARGET_PROPERTY:${_target},INCLUDE_DIRECTORIES>")
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set(_compile_definitions "$<TARGET_PROPERTY:${_target},COMPILE_DEFINITIONS>")
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get_source_file_property(_compile_flags "${_source_name_for_flags}" COMPILE_FLAGS)
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set(_compile_options "$<TARGET_PROPERTY:${_target},COMPILE_OPTIONS>")
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set(_include_directories "$<$<BOOL:${_include_directories}>:-I$<JOIN:${_include_directories},\n-I>\n>")
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set(_compile_definitions "$<$<BOOL:${_compile_definitions}>:-D$<JOIN:${_compile_definitions},\n-D>\n>")
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set(_compile_flags "$<$<BOOL:${_compile_flags}>:$<JOIN:${_compile_flags},\n>\n>")
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set(_compile_options "$<$<BOOL:${_compile_options}>:$<JOIN:${_compile_options},\n>\n>")
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file(GENERATE OUTPUT "${_filename}" CONTENT "${_compile_definitions}${_include_directories}${_compile_flags}${_compile_options}\n")
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endfunction()
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function(add_precompiled_header _target _input)
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if(CMAKE_COMPILER_IS_GNUCXX)
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get_filename_component(_name ${_input} NAME)
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set(_pch_header "${CMAKE_CURRENT_SOURCE_DIR}/${_input}")
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set(_pch_binary_dir "${CMAKE_CURRENT_BINARY_DIR}/${_target}_pch")
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set(_pchfile "${_pch_binary_dir}/${_name}")
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set(_outdir "${_pch_binary_dir}/${_name}.gch")
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make_directory(${_outdir})
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set(_output_cxx "${_outdir}/.c++")
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set(_output_c "${_outdir}/.c")
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get_property(_sources TARGET ${_target} PROPERTY SOURCES)
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foreach(_source ${_sources})
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if(_source MATCHES \\.\(c\)$ AND NOT _source_for_c_flags)
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set(_source_for_c_flags "${_source}")
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elseif(_source MATCHES \\.\(cc|cxx|cpp\)$ AND NOT _source_for_cpp_flags)
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set(_source_for_cpp_flags "${_source}")
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endif()
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endforeach()
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add_custom_command(
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OUTPUT "${_pchfile}"
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COMMAND "${CMAKE_COMMAND}" -E copy "${_pch_header}" "${_pchfile}"
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DEPENDS "${_pch_header}"
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IMPLICIT_DEPENDS CXX "${_pch_header}"
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IMPLICIT_DEPENDS C "${_pch_header}"
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COMMENT "Updating ${_name}")
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if(_source_for_c_flags)
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set(_pch_c_flags_file "${_pch_binary_dir}/compile_flags_c.rsp")
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export_all_flags("${_pch_c_flags_file}" "${_source_for_c_flags}")
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set(_compiler_FLAGS "@${_pch_c_flags_file}")
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add_custom_command(
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OUTPUT "${_output_c}"
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COMMAND "${CMAKE_C_COMPILER}" ${_compiler_FLAGS} -x c-header -o "${_output_c}" -c "${_pchfile}"
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DEPENDS "${_pchfile}" "${_pch_c_flags_file}"
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IMPLICIT_DEPENDS C "${_pch_header}"
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COMMENT "Precompiling ${_name} for ${_target} (C)")
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endif()
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if(_source_for_cpp_flags)
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set(_pch_cpp_flags_file "${_pch_binary_dir}/compile_flags_cpp.rsp")
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export_all_flags("${_pch_cpp_flags_file}" "${_source_for_cpp_flags}")
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set(_compiler_FLAGS "@${_pch_cpp_flags_file}")
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add_custom_command(
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OUTPUT "${_output_cxx}"
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COMMAND "${CMAKE_CXX_COMPILER}" ${_compiler_FLAGS} -x c++-header -o "${_output_cxx}" -c "${_pchfile}"
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DEPENDS "${_pchfile}" "${_pch_cpp_flags_file}"
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IMPLICIT_DEPENDS CXX "${_pch_header}"
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COMMENT "Precompiling ${_name} for ${_target} (C++)")
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endif()
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foreach(_source ${_sources})
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set(_pch_compile_flags "")
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if(_source MATCHES \\.\(cc|cxx|cpp|c\)$)
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get_source_file_property(_pch_compile_flags "${_source}" COMPILE_FLAGS)
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if(NOT _pch_compile_flags)
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set(_pch_compile_flags)
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endif()
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separate_arguments(_pch_compile_flags)
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if(_source MATCHES \\.\(cc|cxx|cpp\)$)
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list(APPEND _pch_compile_flags -include "${_pchfile}")
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else()
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list(APPEND _pch_compile_flags "-I${_pch_binary_dir}")
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endif()
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get_source_file_property(_object_depends "${_source}" OBJECT_DEPENDS)
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if(NOT _object_depends)
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set(_object_depends)
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endif()
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list(APPEND _object_depends "${_pchfile}")
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if(_source MATCHES \\.\(cc|cxx|cpp\)$)
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list(APPEND _object_depends "${_output_cxx}")
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else()
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list(APPEND _object_depends "${_output_c}")
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endif()
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combine_arguments(_pch_compile_flags)
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set_source_files_properties(${_source} PROPERTIES
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COMPILE_FLAGS "${_pch_compile_flags}"
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OBJECT_DEPENDS "${_object_depends}")
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endif()
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endforeach()
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endif(CMAKE_COMPILER_IS_GNUCXX)
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endfunction()
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