llvm dev - Oct 2016 - [Help] How to keep ($clang_dir)/include/clang/AST/Attrs.inc file after compilation?

Hi, I'm playing with tableGenerator in order to add custom attirbute.
Most of attributes are parsed from
($clang_dir)/include/clang/AST/Attrs.inc, which is generated by tableGen
based on *.td, but this generated include file is deleted after parsing
completes.
Is there any compilation option to keep this, or any other way to do it?

Thank you for your valuable time!

-- 
Best, Sung
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