Index: utils/lit-cpuid/CMakeLists.txt
===================================================================
--- utils/lit-cpuid/CMakeLists.txt
+++ utils/lit-cpuid/CMakeLists.txt
@@ -1,6 +1,11 @@
-add_llvm_utility(lit-cpuid
-  lit-cpuid.cpp
-  )
+# targets added via add_llvm_utility get exported via llvm for LLVMConfig.cmake.
+# So standalone builds of lldb can potentially import this via LLVMConfig and
+# also attempt to build it in tree. So only build it if it doesn't exist
+if (NOT TARGET lit-cpuid)
+  add_llvm_utility(lit-cpuid
+    lit-cpuid.cpp
+    )
 
-target_link_libraries(lit-cpuid PRIVATE LLVMSupport)
-set_target_properties(lit-cpuid PROPERTIES FOLDER "lldb utils")
+  target_link_libraries(lit-cpuid PRIVATE LLVMSupport)
+  set_target_properties(lit-cpuid PROPERTIES FOLDER "lldb utils")
+endif()