--- a/GCC_XML/Support/GCC/4.3/gccxml_builtins.h
+++ b/GCC_XML/Support/GCC/4.3/gccxml_builtins.h
@@ -142,6 +142,7 @@ bool __builtin_isless(...);
 bool __builtin_islessequal(...);
 bool __builtin_islessgreater(...);
 bool __builtin_isunordered(...);
+bool __builtin_va_arg_pack(...);
 
 /*
 
-- 
1.6.3.1