[all-commits] [llvm/llvm-project] 7c5e4e: Reapply [compiler-rt] Check for and use -lunwind w...

[Martin Storsjö via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 7c5e4e5fa3a948fc662be3a6bf057021d32f72e6
      https://github.com/llvm/llvm-project/commit/7c5e4e5fa3a948fc662be3a6bf057021d32f72e6
  Author: Martin Storsjö <martin at martin.st>
  Date:   2023-10-05 (Thu, 05 Oct 2023)

  Changed paths:
    M compiler-rt/cmake/config-ix.cmake

  Log Message:
  -----------
  Reapply [compiler-rt] Check for and use -lunwind when linking with -nodefaultlibs (#66584)

If libc++ is available and should be used as the ubsan C++ ABI library,
the check for libc++ might fail if libc++ is a static library, as the
-nodefaultlibs flag inhibits a potential compiler default -lunwind.

Just like the -nodefaultlibs configuration tests for and manually adds a
bunch of compiler default libraries, look for -lunwind too.

This is a reland of #65912.