Index: libcxx/include/__config
===================================================================
--- libcxx/include/__config
+++ libcxx/include/__config
@@ -36,8 +36,12 @@
 #define _LIBCPP_VERSION 7000
 
 #ifndef _LIBCPP_ABI_VERSION
+#ifdef __Fuchsia__
+#define _LIBCPP_ABI_VERSION 2
+#else
 #define _LIBCPP_ABI_VERSION 1
 #endif
+#endif
 
 #if defined(__ELF__)
 #  define _LIBCPP_OBJECT_FORMAT_ELF   1