+++ /dev/null
-From 7c5e4e5fa3a948fc662be3a6bf057021d32f72e6 Mon Sep 17 00:00:00 2001
-From: =?UTF-8?q?Martin=20Storsj=C3=B6?= <martin@martin.st>
-Date: Thu, 5 Oct 2023 11:41:11 +0300
-Subject: [PATCH] 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.
----
- compiler-rt/cmake/config-ix.cmake | 10 ++++++++++
- 1 file changed, 10 insertions(+)
-
-diff --git a/compiler-rt/cmake/config-ix.cmake b/compiler-rt/cmake/config-ix.cmake
-index 09a9b62ce4cd37..a8e078f1ebc988 100644
---- a/compiler-rt/cmake/config-ix.cmake
-+++ b/compiler-rt/cmake/config-ix.cmake
-@@ -63,6 +63,16 @@ if (C_SUPPORTS_NODEFAULTLIBS_FLAG)
- moldname mingwex msvcrt)
- list(APPEND CMAKE_REQUIRED_LIBRARIES ${MINGW_LIBRARIES})
- endif()
-+ if (NOT TARGET unwind)
-+ # Don't check for a library named unwind, if there's a target with that name within
-+ # the same build.
-+ check_library_exists(unwind _Unwind_GetRegionStart "" COMPILER_RT_HAS_LIBUNWIND)
-+ if (COMPILER_RT_HAS_LIBUNWIND)
-+ # If we're omitting default libraries, we might need to manually link in libunwind.
-+ # This can affect whether we detect a statically linked libc++ correctly.
-+ list(APPEND CMAKE_REQUIRED_LIBRARIES unwind)
-+ endif()
-+ endif()
- endif ()
-
- # CodeGen options.