[PATCH] D35797: [ELF] - Implement --warn-once.

[George Rimar via Phabricator via llvm-commits]

grimar created this revision.
Herald added a subscriber: emaste.

--warn-once is a option supported by ld.bfd which is:

  --warn-once
  Only warn once for each undefined symbol, rather than once per module which refers to it.

Reporting undefined symbol only once seems useful feature, that is why I implemented it.
(FWIW gold does not seem to support it).


https://reviews.llvm.org/D35797

Files:
  ELF/Config.h
  ELF/Driver.cpp
  ELF/Options.td
  ELF/Relocations.cpp
  ELF/Symbols.cpp
  ELF/Symbols.h
  test/ELF/warn-once.s

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