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Add `CREATE_LINK` polyfill for older CMakes
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CMakeLists.txt
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CMakeLists.txt
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cmake/create_symlink.cmake
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cmake/create_symlink.cmake
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#
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# used to create a symbolic link at configuration time
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#
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function(create_symlink target output_path)
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if(${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.14.0")
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# use CREATE_LINK if we can
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file(CREATE_LINK "${target}" "${output_path}" SYMBOLIC)
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else()
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# fallback to `ln` otherwise
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execute_process(COMMAND ln -sfn "${target}" "${output_path}")
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endif()
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endfunction()