[all-commits] [llvm/llvm-project] f7c4d7: [compiler-rt] Define ElfW() macro if it's not defined

[Sergej Jaskiewicz via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: f7c4d796ba67dba27361d07a77eefde05d2e0c9c
      https://github.com/llvm/llvm-project/commit/f7c4d796ba67dba27361d07a77eefde05d2e0c9c
  Author: Sergej Jaskiewicz <jaskiewiczs at icloud.com>
  Date:   2020-03-10 (Tue, 10 Mar 2020)

  Changed paths:
    M compiler-rt/lib/sanitizer_common/sanitizer_linux_libcdep.cpp

  Log Message:
  -----------
  [compiler-rt] Define ElfW() macro if it's not defined

Summary:
The `ElfW()` macro is not provided by `<link.h>` on some
systems (e.g., FreeBSD). On these systems the data structures are
just called `Elf_XXX`. Define `ElfW()` locally.

(This fix is taken from [libunwind](https://github.com/llvm/llvm-project/blob/9b05596eff21388ae6f17cdea8df0538dc630441/libunwind/src/AddressSpace.hpp#L144-L157).)

Reviewers: compnerd

Differential revision: https://reviews.llvm.org/D75907