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27 lines
No EOL
1.6 KiB
CMake
27 lines
No EOL
1.6 KiB
CMake
# Configures sources on a target to use a precompiled header. This function takes a target and
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# header name as input. The function will generate a .cpp file that includes the header and is used
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# to generate the precompiled header; this source file is added to the target's sources.
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function(target_precompiled_header target_name header_name)
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if (MSVC)
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# The input precompiled header source (i.e. the '.h' file used for the precompiled header).
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set(pch_header_path ${header_name})
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get_filename_component(header_base_name ${header_name} NAME_WE)
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# Generate the source file that builds the precompiled header. The generated file will have
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# the same base name as the input header name, but has the .cpp extension.
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set(pch_source_path ${CMAKE_CURRENT_BINARY_DIR}/${header_base_name}.cpp)
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set(pch_source_content "// THIS FILE IS GENERATED BY CMAKE\n#include \"${pch_header_path}\"")
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file(WRITE ${pch_source_path} ${pch_source_content})
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set_source_files_properties(${pch_source_path} PROPERTIES COMPILE_FLAGS "/Yc${pch_header_path}")
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# The target's C++ sources use the precompiled header (/Yu). Source-level properties will
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# take precedence over target-level properties, so this will not change the generated source
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# file's property to create the precompiled header (/Yc).
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target_compile_options(${target_name} PRIVATE $<$<COMPILE_LANGUAGE:CXX>:/Yu${header_name}>)
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# Append generated precompiled source to target's sources.
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target_sources(${target_name} PRIVATE ${pch_source_path})
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endif(MSVC)
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endfunction() |