Rename uses of _ and __ because these are getting stepped on by macros from other system code.
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@167038 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/system_error b/include/system_error
index 9f7e4e9..cbc52fb 100644
--- a/include/system_error
+++ b/include/system_error
@@ -350,7 +350,7 @@
#ifdef _LIBCPP_HAS_NO_STRONG_ENUMS
template <>
-struct _LIBCPP_VISIBLE is_error_condition_enum<errc::_>
+struct _LIBCPP_VISIBLE is_error_condition_enum<errc::__lx>
: true_type { };
#endif