Index: llvm/trunk/runtimes/CMakeLists.txt
===================================================================
--- llvm/trunk/runtimes/CMakeLists.txt
+++ llvm/trunk/runtimes/CMakeLists.txt
@@ -107,6 +107,13 @@
     endif()
   endif()
 
+  # Avoid checking whether the compiler is working.
+  set(LLVM_COMPILER_CHECKED ON)
+
+  # Handle common options used by all runtimes.
+  include(AddLLVM)
+  include(HandleLLVMOptions)
+
   set(CMAKE_REQUIRED_FLAGS ${SAFE_CMAKE_REQUIRED_FLAGS})
   set(CMAKE_REQUIRED_LIBRARIES ${SAFE_CMAKE_REQUIRED_LIBRARIES})