Index: cmake/Modules/HandleOutOfTreeLLVM.cmake
===================================================================
--- cmake/Modules/HandleOutOfTreeLLVM.cmake
+++ cmake/Modules/HandleOutOfTreeLLVM.cmake
@@ -93,6 +93,7 @@
   endif()
   if (LLVM_FOUND)
     include(AddLLVM OPTIONAL)
+    include(HandleLLVMOptions OPTIONAL)
   endif()
 
   # LLVM Options --------------------------------------------------------------