Index: runtime/CMakeLists.txt
===================================================================
--- runtime/CMakeLists.txt
+++ runtime/CMakeLists.txt
@@ -62,6 +62,10 @@
     set(COMPILER_RT_LIBCXX_DEPENDENCY "cxx-headers")
   endif()
 
+  if(LLVM_INCLUDE_TESTS)
+    list(APPEND COMPILER_RT_LIBCXX_DEPENDENCY LLVMTestingSupport)
+  endif()
+
   ExternalProject_Add(compiler-rt
     DEPENDS llvm-config clang ${COMPILER_RT_LIBCXX_DEPENDENCY}
     PREFIX ${COMPILER_RT_PREFIX}