mirror of
https://github.com/ZDoom/gzdoom-gles.git
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798b6d0d5e
This eliminates rebuilding of main executable by MSVC on every project generation by CMake
(cherry picked from commit 220d923e65)
45 lines
No EOL
1.8 KiB
CMake
45 lines
No EOL
1.8 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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set(pch_content "// Precompiled header unity generated by CMake\n#include <${pch_abs}>\n")
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# Read .cpp if exists
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if(EXISTS ${pch_unity})
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file(READ ${pch_unity} pch_content_prev)
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endif()
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# Compare existing .cpp content with the actual one
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if (pch_content_prev AND pch_content STREQUAL pch_content_prev)
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unset(pch_content)
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endif()
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# Write .cpp if it's out-of-date
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if (pch_content)
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FILE(WRITE ${pch_unity} "${pch_content}")
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endif()
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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) |