[PATCH] D91510: [ELF] Fix interaction between --unresolved-symbols= and --[no-]allow-shlib-undefined

[Fangrui Song via Phabricator via llvm-commits]

MaskRay created this revision.
MaskRay added reviewers: grimar, psmith, ruiu.
Herald added subscribers: llvm-commits, arichardson, emaste.
Herald added a reviewer: espindola.
Herald added a project: LLVM.
MaskRay requested review of this revision.

As mentioned in https://reviews.llvm.org/D67479#1667256 ,
`--unresolved-symbols=` sets `--[no-]allow-shlib-undefined` and `-z [un]defs` simultaneously.
In addition, --warn-unresolved-symbols affects --no-allow-shlib-undefined.

This patch makes the behavior match GNU ld.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D91510

Files:
  lld/ELF/Config.h
  lld/ELF/Driver.cpp
  lld/ELF/Writer.cpp
  lld/test/ELF/allow-shlib-undefined.s
  lld/test/ELF/unresolved-symbols.s

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