[PATCH] D86762: [ELF] Add documentation for --warn-backrefs: a layering check tool

[Fangrui Song via Phabricator via llvm-commits]

MaskRay added a comment.

I wonder whether we can make --warn-backrefs the default in the next release (of course we should give folks time as many are probably running `--fatal-warnings`). https://lists.llvm.org/pipermail/llvm-dev/2020-August/144634.html


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