Index: runtimes/CMakeLists.txt
===================================================================
--- runtimes/CMakeLists.txt
+++ runtimes/CMakeLists.txt
@@ -224,14 +224,6 @@
           set(target ${LLVM_DEFAULT_TARGET_TRIPLE})
         endif()
 
-        string(REPLACE "-" ";" builtin_target_list ${target})
-        foreach(item ${builtin_target_list})
-          string(TOLOWER "${item}" item_lower)
-          if(item_lower MATCHES "darwin")
-            message(FATAL_ERROR "LLVM_BUILTIN_TARGETS isn't implemented for Darwin platform!")
-          endif()
-        endforeach()
-
         foreach(variableName ${variableNames})
           if(variableName MATCHES "^BUILTINS_${target}")
             string(REPLACE "BUILTINS_${target}_" "" new_name ${variableName})