diff --git a/llvm/cmake/modules/AddLLVM.cmake b/llvm/cmake/modules/AddLLVM.cmake
--- a/llvm/cmake/modules/AddLLVM.cmake
+++ b/llvm/cmake/modules/AddLLVM.cmake
@@ -851,6 +851,7 @@
     # dependencies, then the dependencies of those dependencies, and so on.
     get_target_property(new_libs ${target} LINK_LIBRARIES)
     set(link_libs ${new_libs})
+    list(REMOVE_DUPLICATES new_libs)
     while(NOT "${new_libs}" STREQUAL "")
       foreach(lib ${new_libs})
         if(TARGET ${lib})