[all-commits] [llvm/llvm-project] 55d310: [ELF] Fix interaction between --unresolved-symbols...

[Fangrui Song via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 55d310adc068a569eaa5370e5b94428ed9ea7ed8
      https://github.com/llvm/llvm-project/commit/55d310adc068a569eaa5370e5b94428ed9ea7ed8
  Author: Fangrui Song <i at maskray.me>
  Date:   2020-11-17 (Tue, 17 Nov 2020)

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

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

As mentioned in https://reviews.llvm.org/D67479#1667256 ,

* `--[no-]allow-shlib-undefined` control the diagnostic for an unresolved symbol in a shared object
* `-z defs/-z undefs` control the diagnostic for an unresolved symbol in a regular object file
* `--unresolved-symbols=` controls both bits.

In addition, make --warn-unresolved-symbols affect --no-allow-shlib-undefined.

This patch makes the behavior match GNU ld.

Reviewed By: psmith

Differential Revision: https://reviews.llvm.org/D91510