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Due to the VC++ 2015 headers being rather bloated (the average include size per source is 400-500kb) this provides a noticable compile speedup, although right now this only covers the game code, so there should be more room for improvement.
34 lines
No EOL
1.5 KiB
CMake
34 lines
No EOL
1.5 KiB
CMake
#
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# Christoph Heindl 2010
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# Precompiled Headers Demo
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# http://cheind.wordpress.com
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#
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# Instructs the MSVC toolset to use the precompiled header PRECOMPILED_HEADER
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# for each source file given in the collection named by SOURCE_VARIABLE_NAME.
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function(enable_precompiled_headers PRECOMPILED_HEADER SOURCE_VARIABLE_NAME)
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if(MSVC)
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set(files ${${SOURCE_VARIABLE_NAME}})
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# Generate precompiled header translation unit
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get_filename_component(pch_basename ${PRECOMPILED_HEADER} NAME_WE)
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set(pch_abs ${CMAKE_CURRENT_SOURCE_DIR}/${PRECOMPILED_HEADER})
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set(pch_unity ${CMAKE_CURRENT_BINARY_DIR}/${pch_basename}.cpp)
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FILE(WRITE ${pch_unity} "// Precompiled header unity generated by CMake\n")
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FILE(APPEND ${pch_unity} "#include <${pch_abs}>\n")
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set_source_files_properties(${pch_unity} PROPERTIES COMPILE_FLAGS "/Yc\"${pch_abs}\"")
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# Update properties of source files to use the precompiled header.
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# Additionally, force the inclusion of the precompiled header at beginning of each source file.
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foreach(source_file ${files} )
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set_source_files_properties(
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${source_file}
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PROPERTIES COMPILE_FLAGS
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"/Yu\"${pch_abs}\" /FI\"${pch_abs}\""
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)
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endforeach(source_file)
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# Finally, update the source file collection to contain the precompiled header translation unit
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set(${SOURCE_VARIABLE_NAME} ${${SOURCE_VARIABLE_NAME}} ${pch_unity} PARENT_SCOPE)
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endif(MSVC)
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endfunction(enable_precompiled_headers) |