[PATCH] D74169: [LLD][ELF][DebugInfo] Skeleton implementation of removing obsolete debug info.

[Alexey Lapshin via Phabricator via llvm-commits]

avl created this revision.
avl added reviewers: ruiu, grimar, dblaikie, probinson.
Herald added subscribers: MaskRay, arichardson, aprantl, mgorny, emaste.
Herald added a reviewer: JDevlieghere.
Herald added a reviewer: espindola.
Herald added a project: LLVM.

There was a thread at llvm-dev about removing obsolete debug info:

http://lists.llvm.org/pipermail/llvm-dev/2019-September/135473.html

This patch is the first skeleton implementation for this.
It does not produce any results. It includes:

- DWARFLinker library(extracted from dsymutil tool)
- --gc-debuginfo option.
- LLDDwarfLinker.h/.cpp

Other functionality assumed to be added by the set of small
incremental patches.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D74169

Files:
  lld/ELF/CMakeLists.txt
  lld/ELF/Config.h
  lld/ELF/Driver.cpp
  lld/ELF/LLDDwarfLinker.cpp
  lld/ELF/LLDDwarfLinker.h
  lld/ELF/Options.td
  lld/test/ELF/gc-debuginfo.s

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