We already link libunwind explicitly so avoid trying to link toolchain's
default libunwind which may be missing. This matches what we already do
for libcxx.
Differential Revision: https://reviews.llvm.org/D129469
add_link_flags_if_supported(-nodefaultlibs)
endif()
+if (CXX_SUPPORTS_UNWINDLIB_EQ_NONE_FLAG AND LIBCXXABI_USE_LLVM_UNWINDER)
+ # If we're linking directly against the libunwind that we're building
+ # in the same invocation, don't try to link in the toolchain's
+ # default libunwind (which may be missing still).
+ add_link_flags_if_supported(--unwindlib=none)
+endif()
+
if ( APPLE )
if (LLVM_USE_SANITIZER)
if (("${LLVM_USE_SANITIZER}" STREQUAL "Address") OR