[PATCH] D109572: [ELF] Add --why-extract= to query why archive members/lazy object files are extracted

[Fangrui Song via Phabricator via llvm-commits]

MaskRay updated this revision to Diff 372585.
MaskRay retitled this revision from "[ELF] Add --why-extract= to query why an archive member/lazy object file is extracted" to "[ELF] Add --why-extract= to query why archive members/lazy object files are extracted".
MaskRay edited the summary of this revision.
MaskRay added a comment.

- add a backward reference test
- add an entry to lld/docs/ReleaseNotes.rst

I'll wait one week before committing.

Why not checking --gc-sections, I think this is a quite good approximation.
In the past, I have used a chain of -t and -y sym to dig such information.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D109572/new/

https://reviews.llvm.org/D109572

Files:
  lld/ELF/Config.h
  lld/ELF/Driver.cpp
  lld/ELF/MapFile.cpp
  lld/ELF/MapFile.h
  lld/ELF/Options.td
  lld/ELF/Symbols.cpp
  lld/ELF/Symbols.h
  lld/ELF/Writer.cpp
  lld/docs/ReleaseNotes.rst
  lld/docs/ld.lld.1
  lld/test/ELF/why-extract.s

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