--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libstdc++-v3/testsuite/19_diagnostics/error_code/operators/less.cc	Mon May 25 07:50:57 2020 +0900
@@ -0,0 +1,38 @@
+// { dg-do run { target c++11 } }
+// { dg-additional-options "-static-libstdc++" { target *-*-mingw* } }
+
+// Copyright (C) 2020 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License along
+// with this library; see the file COPYING3.  If not see
+// <http://www.gnu.org/licenses/>.
+
+#include <system_error>
+#include <testsuite_error.h>
+
+int main()
+{
+  std::error_code e1;
+  std::error_code e2(std::make_error_code(std::errc::operation_not_supported));
+
+  VERIFY( !(e1 < e1) );
+  VERIFY( !(e2 < e2) );
+
+  VERIFY( (e1 < e2) == (e1.value() < e2.value()) );
+
+  const __gnu_test::test_category cat;
+  std::error_code e3(e2.value(), cat);
+  VERIFY( !(e3 < e3) );
+  VERIFY( (e2 < e3) == (e2.category() < e3.category()) );
+}