[all-commits] [llvm/llvm-project] 70e62a: [ELF] Suggest extern "C" when an undefined referen...

[Fangrui Song via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 70e62a4fa6c2146fb49ee4460dad8e04152ce0a6
      https://github.com/llvm/llvm-project/commit/70e62a4fa6c2146fb49ee4460dad8e04152ce0a6
  Author: Fangrui Song <maskray at google.com>
  Date:   2019-11-08 (Fri, 08 Nov 2019)

  Changed paths:
    M lld/ELF/CMakeLists.txt
    M lld/ELF/Relocations.cpp
    A lld/test/ELF/undef-suggest-extern-c.s

  Log Message:
  -----------
  [ELF] Suggest extern "C" when an undefined reference is mangled while the definition is not

When missing an extern "C" declaration, an undefined reference may be
mangled while the definition is not. Suggest the missing
extern "C" and the base name.

Reviewed By: ruiu

Differential Revision: https://reviews.llvm.org/D69592