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# Sets the __FILE__ macro value to be relative to CMAKE_SOURCE_DIR.
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function(set_relative_file_macro TARGET)
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if(NOT CMAKE_CXX_COMPILER_ID MATCHES "MSVC")
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if((CMAKE_CXX_COMPILER_ID MATCHES "Clang" AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 12)
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OR (CMAKE_CXX_COMPILER_ID MATCHES "GNU" AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 8))
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target_compile_options(${TARGET} PUBLIC "-fmacro-prefix-map=${CMAKE_SOURCE_DIR}/=")
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else()
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get_target_property(_srcs ${TARGET} SOURCES)
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foreach(_src ${_srcs})
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set_source_files_properties(${_src} PROPERTIES COMPILE_DEFINITIONS __FILE__="${_src}")
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endforeach()
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target_compile_options(${TARGET} PRIVATE -Wno-builtin-macro-redefined)
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endif()
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endif()
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endfunction()
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