Index: include/sanitizer/asan_interface.h
===================================================================
--- include/sanitizer/asan_interface.h
+++ include/sanitizer/asan_interface.h
@@ -148,6 +148,10 @@
   // before things like _exit and execl to avoid false positives on stack.
   void __asan_handle_no_return(void);
 
+  // Required to allow ASAN versions of libc++abi to build against older
+  // versions of compiler-rt that do not provide this interface.
+# define SANITIZER_ASAN_INTERFACE_HAS_HANDLE_NO_RETURN
+
 #ifdef __cplusplus
 }  // extern "C"
 #endif