diff --git a/cmake/Modules/HandleCompilerRT.cmake b/cmake/Modules/HandleCompilerRT.cmake
index 275243a..77168e5 100644
--- a/cmake/Modules/HandleCompilerRT.cmake
+++ b/cmake/Modules/HandleCompilerRT.cmake
@@ -8,6 +8,9 @@
   if (CMAKE_CXX_COMPILER_ID MATCHES Clang AND CMAKE_CXX_COMPILER_TARGET)
     list(APPEND CLANG_COMMAND "--target=${CMAKE_CXX_COMPILER_TARGET}")
   endif()
+  get_property(LIBUNWIND_CXX_FLAGS CACHE CMAKE_CXX_FLAGS PROPERTY VALUE)
+  string(REPLACE " " ";" LIBUNWIND_CXX_FLAGS "${LIBUNWIND_CXX_FLAGS}")
+  list(APPEND CLANG_COMMAND ${LIBUNWIND_CXX_FLAGS})
   execute_process(
       COMMAND ${CLANG_COMMAND}
       RESULT_VARIABLE HAD_ERROR