[v3] -Wall fixes to the new constrexpr_* testcases

Index: testsuite/28_regex/05_constants/syntax_option_type.cc
===================================================================
--- testsuite/28_regex/05_constants/syntax_option_type.cc	(revision 166194)
+++ testsuite/28_regex/05_constants/syntax_option_type.cc	(working copy)
@@ -70,15 +70,16 @@ 
   option = ~std::regex_constants::awk;
   option = ~std::regex_constants::grep;
   option = ~std::regex_constants::egrep;
+  option = option;
 }
 
 void
 test04_constexpr()
 {
   using namespace std::regex_constants;
-  constexpr auto a1 = icase | awk;
-  constexpr auto a2 = icase & awk;
-  constexpr auto a3 = ~grep;
+  constexpr auto a1 __attribute__((unused)) = icase | awk;
+  constexpr auto a2 __attribute__((unused)) = icase & awk;
+  constexpr auto a3 __attribute__((unused)) = ~grep;
 }
 
 int main()
Index: testsuite/28_regex/08_basic_regex/requirements/constexpr_data.cc
===================================================================
--- testsuite/28_regex/08_basic_regex/requirements/constexpr_data.cc	(revision 166194)
+++ testsuite/28_regex/08_basic_regex/requirements/constexpr_data.cc	(working copy)
@@ -33,16 +33,26 @@ 
 	{
 	  void __constraint()
 	  {
-	    constexpr auto v1(_Ttesttype::icase);
-	    constexpr auto v2(_Ttesttype::nosubs);
-	    constexpr auto v3(_Ttesttype::optimize);
-	    constexpr auto v4(_Ttesttype::collate);
-	    constexpr auto v5(_Ttesttype::ECMAScript);
-	    constexpr auto v6(_Ttesttype::basic);
-	    constexpr auto v7(_Ttesttype::extended);
-	    constexpr auto v8(_Ttesttype::awk);
-	    constexpr auto v9(_Ttesttype::grep);
-	    constexpr auto v10(_Ttesttype::egrep);
+	    constexpr auto v1 __attribute__((unused))
+	      = _Ttesttype::icase;
+	    constexpr auto v2 __attribute__((unused))
+	      = _Ttesttype::nosubs;
+	    constexpr auto v3 __attribute__((unused))
+	      = _Ttesttype::optimize;
+	    constexpr auto v4 __attribute__((unused))
+	      = _Ttesttype::collate;
+	    constexpr auto v5 __attribute__((unused))
+	      = _Ttesttype::ECMAScript;
+	    constexpr auto v6 __attribute__((unused))
+	      = _Ttesttype::basic;
+	    constexpr auto v7 __attribute__((unused))
+	      = _Ttesttype::extended;
+	    constexpr auto v8 __attribute__((unused))
+	      = _Ttesttype::awk;
+	    constexpr auto v9 __attribute__((unused))
+	      = _Ttesttype::grep;
+	    constexpr auto v10 __attribute__((unused))
+	      = _Ttesttype::egrep;
 	  }
 	};
 
Index: testsuite/18_support/numeric_limits/requirements/constexpr_functions.cc
===================================================================
--- testsuite/18_support/numeric_limits/requirements/constexpr_functions.cc	(revision 166194)
+++ testsuite/18_support/numeric_limits/requirements/constexpr_functions.cc	(working copy)
@@ -33,15 +33,24 @@ 
 	{
 	  void __constraint()
 	  { 
-	    constexpr _Tbasetype v1(_Ttesttype::min());
-	    constexpr _Tbasetype v2(_Ttesttype::max());
-	    constexpr _Tbasetype v3(_Ttesttype::lowest());
-	    constexpr _Tbasetype v4(_Ttesttype::epsilon());
-	    constexpr _Tbasetype v5(_Ttesttype::round_error());
-	    constexpr _Tbasetype v6(_Ttesttype::infinity());
-	    constexpr _Tbasetype v7(_Ttesttype::quiet_NaN());
-	    constexpr _Tbasetype v8(_Ttesttype::signaling_NaN());
-	    constexpr _Tbasetype v9(_Ttesttype::denorm_min());
+	    constexpr _Tbasetype v1 __attribute__((unused))
+	      = _Ttesttype::min();
+	    constexpr _Tbasetype v2 __attribute__((unused))
+	      = _Ttesttype::max();
+	    constexpr _Tbasetype v3 __attribute__((unused))
+	      = _Ttesttype::lowest();
+	    constexpr _Tbasetype v4 __attribute__((unused))
+	      = _Ttesttype::epsilon();
+	    constexpr _Tbasetype v5 __attribute__((unused))
+	      = _Ttesttype::round_error();
+	    constexpr _Tbasetype v6 __attribute__((unused))
+	      = _Ttesttype::infinity();
+	    constexpr _Tbasetype v7 __attribute__((unused))
+	      = _Ttesttype::quiet_NaN();
+	    constexpr _Tbasetype v8 __attribute__((unused))
+	      = _Ttesttype::signaling_NaN();
+	    constexpr _Tbasetype v9 __attribute__((unused))
+	      = _Ttesttype::denorm_min();
 	  }
 	};
 
Index: testsuite/18_support/numeric_limits/requirements/constexpr_data.cc
===================================================================
--- testsuite/18_support/numeric_limits/requirements/constexpr_data.cc	(revision 166194)
+++ testsuite/18_support/numeric_limits/requirements/constexpr_data.cc	(working copy)
@@ -35,29 +35,52 @@ 
 	  { 
 	    using std::float_denorm_style;
 	    using std::float_round_style;
-	    constexpr bool v1(_Ttesttype::is_specialized);
-	    constexpr int v2(_Ttesttype::digits);
-	    constexpr int v3(_Ttesttype::digits10);
-	    constexpr int v4(_Ttesttype::max_digits10);
-	    constexpr bool v5(_Ttesttype::is_signed);
-	    constexpr bool v6(_Ttesttype::is_integer);
-	    constexpr bool v7(_Ttesttype::is_exact);
-	    constexpr int v8(_Ttesttype::radix);
-	    constexpr int v9(_Ttesttype::min_exponent);
-	    constexpr int v10(_Ttesttype::min_exponent10);
-	    constexpr int v11(_Ttesttype::max_exponent);
-	    constexpr int v12(_Ttesttype::max_exponent10);
-	    constexpr bool v13(_Ttesttype::has_infinity);
-	    constexpr bool v14(_Ttesttype::has_quiet_NaN);
-	    constexpr bool v15(_Ttesttype::has_signaling_NaN);
-	    constexpr float_denorm_style v16(_Ttesttype::has_denorm);
-	    constexpr bool v17(_Ttesttype::has_denorm_loss);
-	    constexpr bool v18(_Ttesttype::is_iec559);
-	    constexpr bool v19(_Ttesttype::is_bounded);
-	    constexpr bool v20(_Ttesttype::is_modulo);
-	    constexpr bool v21(_Ttesttype::traps);
-	    constexpr bool v22(_Ttesttype::tinyness_before);
-	    constexpr float_round_style v23(_Ttesttype::round_style);
+	    constexpr bool v1 __attribute__((unused))
+	      = _Ttesttype::is_specialized;
+	    constexpr int v2 __attribute__((unused))
+	      = _Ttesttype::digits;
+	    constexpr int v3 __attribute__((unused))
+	      = _Ttesttype::digits10;
+	    constexpr int v4 __attribute__((unused))
+	      = _Ttesttype::max_digits10;
+	    constexpr bool v5 __attribute__((unused))
+	      = _Ttesttype::is_signed;
+	    constexpr bool v6 __attribute__((unused))
+	      = _Ttesttype::is_integer;
+	    constexpr bool v7 __attribute__((unused))
+	      = _Ttesttype::is_exact;
+	    constexpr int v8 __attribute__((unused))
+	      = _Ttesttype::radix;
+	    constexpr int v9 __attribute__((unused))
+	      = _Ttesttype::min_exponent;
+	    constexpr int v10 __attribute__((unused))
+	      = _Ttesttype::min_exponent10;
+	    constexpr int v11 __attribute__((unused))
+	      = _Ttesttype::max_exponent;
+	    constexpr int v12 __attribute__((unused))
+	      = _Ttesttype::max_exponent10;
+	    constexpr bool v13 __attribute__((unused))
+	      = _Ttesttype::has_infinity;
+	    constexpr bool v14 __attribute__((unused))
+	      = _Ttesttype::has_quiet_NaN;
+	    constexpr bool v15 __attribute__((unused))
+	      = _Ttesttype::has_signaling_NaN;
+	    constexpr float_denorm_style v16 __attribute__((unused))
+	      = _Ttesttype::has_denorm;
+	    constexpr bool v17 __attribute__((unused))
+	      = _Ttesttype::has_denorm_loss;
+	    constexpr bool v18 __attribute__((unused))
+	      = _Ttesttype::is_iec559;
+	    constexpr bool v19 __attribute__((unused))
+	      = _Ttesttype::is_bounded;
+	    constexpr bool v20 __attribute__((unused))
+	      = _Ttesttype::is_modulo;
+	    constexpr bool v21 __attribute__((unused))
+	      = _Ttesttype::traps;
+	    constexpr bool v22 __attribute__((unused))
+	      = _Ttesttype::tinyness_before;
+	    constexpr float_round_style v23 __attribute__((unused))
+	      = _Ttesttype::round_style;
 	  }
 	};
 
Index: testsuite/21_strings/char_traits/requirements/constexpr_functions.cc
===================================================================
--- testsuite/21_strings/char_traits/requirements/constexpr_functions.cc	(revision 166194)
+++ testsuite/21_strings/char_traits/requirements/constexpr_functions.cc	(working copy)
@@ -38,13 +38,20 @@ 
 	    const char_type c1(0);
 	    const char_type c2 = c1;
 	    const int_type i(0);
-	    constexpr auto v1(_Ttesttype::eq(c1, c2));
-	    constexpr auto v2(_Ttesttype::lt(c1, c2));
-	    constexpr auto v3(_Ttesttype::to_char_type(i));
-	    constexpr auto v4(_Ttesttype::to_int_type(c1));
-	    constexpr auto v5(_Ttesttype::eq_int_type(i, i));
-	    constexpr auto v6(_Ttesttype::eof());
-	    constexpr auto v7(_Ttesttype::not_eof(i));
+	    constexpr auto v1 __attribute__((unused))
+	      = _Ttesttype::eq(c1, c2);
+	    constexpr auto v2 __attribute__((unused))
+	      = _Ttesttype::lt(c1, c2);
+	    constexpr auto v3 __attribute__((unused))
+	      = _Ttesttype::to_char_type(i);
+	    constexpr auto v4 __attribute__((unused))
+	      = _Ttesttype::to_int_type(c1);
+	    constexpr auto v5 __attribute__((unused))
+	      = _Ttesttype::eq_int_type(i, i);
+	    constexpr auto v6 __attribute__((unused))
+	      = _Ttesttype::eof();
+	    constexpr auto v7 __attribute__((unused))
+	      = _Ttesttype::not_eof(i);
 	  }
 	};
 
Index: testsuite/26_numerics/random/independent_bits_engine/requirements/constexpr_functions.cc
===================================================================
--- testsuite/26_numerics/random/independent_bits_engine/requirements/constexpr_functions.cc	(revision 166194)
+++ testsuite/26_numerics/random/independent_bits_engine/requirements/constexpr_functions.cc	(working copy)
@@ -33,8 +33,10 @@ 
 	{
 	  void __constraint()
 	  { 
-	    constexpr auto v1(_Ttesttype::min());
-	    constexpr auto v2(_Ttesttype::max());
+	    constexpr auto v1 __attribute__((unused))
+	      = _Ttesttype::min();
+	    constexpr auto v2 __attribute__((unused))
+	      = _Ttesttype::max();
 	  }
 	};
 
Index: testsuite/26_numerics/random/subtract_with_carry_engine/requirements/constexpr_functions.cc
===================================================================
--- testsuite/26_numerics/random/subtract_with_carry_engine/requirements/constexpr_functions.cc	(revision 166194)
+++ testsuite/26_numerics/random/subtract_with_carry_engine/requirements/constexpr_functions.cc	(working copy)
@@ -33,8 +33,10 @@ 
 	{
 	  void __constraint()
 	  { 
-	    constexpr auto v1(_Ttesttype::min());
-	    constexpr auto v2(_Ttesttype::max());
+	    constexpr auto v1 __attribute__((unused))
+	      = _Ttesttype::min();
+	    constexpr auto v2 __attribute__((unused))
+	      = _Ttesttype::max();
 	  }
 	};
 
Index: testsuite/26_numerics/random/subtract_with_carry_engine/requirements/constexpr_data.cc
===================================================================
--- testsuite/26_numerics/random/subtract_with_carry_engine/requirements/constexpr_data.cc	(revision 166194)
+++ testsuite/26_numerics/random/subtract_with_carry_engine/requirements/constexpr_data.cc	(working copy)
@@ -33,10 +33,14 @@ 
 	{
 	  void __constraint()
 	  {
-	    constexpr auto v1(_Ttesttype::word_size);
-	    constexpr auto v2(_Ttesttype::short_lag);
-	    constexpr auto v3(_Ttesttype::long_lag);
-	    constexpr auto v4(_Ttesttype::default_seed);
+	    constexpr auto v1 __attribute__((unused))
+	      = _Ttesttype::word_size;
+	    constexpr auto v2 __attribute__((unused))
+	      = _Ttesttype::short_lag;
+	    constexpr auto v3 __attribute__((unused))
+	      = _Ttesttype::long_lag;
+	    constexpr auto v4 __attribute__((unused))
+	      = _Ttesttype::default_seed;
 	  }
 	};
 
Index: testsuite/26_numerics/random/discard_block_engine/requirements/constexpr_functions.cc
===================================================================
--- testsuite/26_numerics/random/discard_block_engine/requirements/constexpr_functions.cc	(revision 166194)
+++ testsuite/26_numerics/random/discard_block_engine/requirements/constexpr_functions.cc	(working copy)
@@ -33,8 +33,10 @@ 
 	{
 	  void __constraint()
 	  { 
-	    constexpr auto v1(_Ttesttype::min());
-	    constexpr auto v2(_Ttesttype::max());
+	    constexpr auto v1 __attribute__((unused))
+	      = _Ttesttype::min();
+	    constexpr auto v2 __attribute__((unused))
+	      = _Ttesttype::max();
 	  }
 	};
 
Index: testsuite/26_numerics/random/discard_block_engine/requirements/constexpr_data.cc
===================================================================
--- testsuite/26_numerics/random/discard_block_engine/requirements/constexpr_data.cc	(revision 166194)
+++ testsuite/26_numerics/random/discard_block_engine/requirements/constexpr_data.cc	(working copy)
@@ -33,8 +33,10 @@ 
 	{
 	  void __constraint()
 	  {
-	    constexpr auto v1(_Ttesttype::block_size);
-	    constexpr auto v2(_Ttesttype::used_block);
+	    constexpr auto v1 __attribute__((unused))
+	      = _Ttesttype::block_size;
+	    constexpr auto v2 __attribute__((unused))
+	      = _Ttesttype::used_block;
 	  }
 	};
 
Index: testsuite/26_numerics/random/mersenne_twister_engine/requirements/constexpr_functions.cc
===================================================================
--- testsuite/26_numerics/random/mersenne_twister_engine/requirements/constexpr_functions.cc	(revision 166194)
+++ testsuite/26_numerics/random/mersenne_twister_engine/requirements/constexpr_functions.cc	(working copy)
@@ -33,8 +33,10 @@ 
 	{
 	  void __constraint()
 	  { 
-	    constexpr auto v1(_Ttesttype::min());
-	    constexpr auto v2(_Ttesttype::max());
+	    constexpr auto v1 __attribute__((unused))
+	      = _Ttesttype::min();
+	    constexpr auto v2 __attribute__((unused))
+	      = _Ttesttype::max();
 	  }
 	};
 
Index: testsuite/26_numerics/random/mersenne_twister_engine/requirements/constexpr_data.cc
===================================================================
--- testsuite/26_numerics/random/mersenne_twister_engine/requirements/constexpr_data.cc	(revision 166194)
+++ testsuite/26_numerics/random/mersenne_twister_engine/requirements/constexpr_data.cc	(working copy)
@@ -33,20 +33,34 @@ 
 	{
 	  void __constraint()
 	  {
-	    constexpr auto v1(_Ttesttype::word_size);
-	    constexpr auto v2(_Ttesttype::state_size);
-	    constexpr auto v3(_Ttesttype::shift_size);
-	    constexpr auto v4(_Ttesttype::mask_bits);
-	    constexpr auto v5(_Ttesttype::xor_mask);
-	    constexpr auto v6(_Ttesttype::tempering_u);
-	    constexpr auto v7(_Ttesttype::tempering_d);
-	    constexpr auto v8(_Ttesttype::tempering_s);
-	    constexpr auto v9(_Ttesttype::tempering_b);
-	    constexpr auto v10(_Ttesttype::tempering_t);
-	    constexpr auto v11(_Ttesttype::tempering_c);
-	    constexpr auto v12(_Ttesttype::tempering_l);
-	    constexpr auto v13(_Ttesttype::initialization_multiplier);
-	    constexpr auto v14(_Ttesttype::default_seed);
+	    constexpr auto v1 __attribute__((unused))
+	      = _Ttesttype::word_size;
+	    constexpr auto v2 __attribute__((unused))
+	      = _Ttesttype::state_size;
+	    constexpr auto v3 __attribute__((unused))
+	      = _Ttesttype::shift_size;
+	    constexpr auto v4 __attribute__((unused))
+	      = _Ttesttype::mask_bits;
+	    constexpr auto v5 __attribute__((unused))
+	      = _Ttesttype::xor_mask;
+	    constexpr auto v6 __attribute__((unused))
+	      = _Ttesttype::tempering_u;
+	    constexpr auto v7 __attribute__((unused))
+	      = _Ttesttype::tempering_d;
+	    constexpr auto v8 __attribute__((unused))
+	      = _Ttesttype::tempering_s;
+	    constexpr auto v9 __attribute__((unused))
+	      = _Ttesttype::tempering_b;
+	    constexpr auto v10 __attribute__((unused))
+	      = _Ttesttype::tempering_t;
+	    constexpr auto v11 __attribute__((unused))
+	      = _Ttesttype::tempering_c;
+	    constexpr auto v12 __attribute__((unused))
+	      = _Ttesttype::tempering_l;
+	    constexpr auto v13 __attribute__((unused))
+	      = _Ttesttype::initialization_multiplier;
+	    constexpr auto v14 __attribute__((unused))
+	      = _Ttesttype::default_seed;
 	  }
 	};
 
Index: testsuite/26_numerics/random/linear_congruential_engine/requirements/constexpr_functions.cc
===================================================================
--- testsuite/26_numerics/random/linear_congruential_engine/requirements/constexpr_functions.cc	(revision 166194)
+++ testsuite/26_numerics/random/linear_congruential_engine/requirements/constexpr_functions.cc	(working copy)
@@ -33,8 +33,10 @@ 
 	{
 	  void __constraint()
 	  { 
-	    constexpr auto v1(_Ttesttype::min());
-	    constexpr auto v2(_Ttesttype::max());
+	    constexpr auto v1 __attribute__((unused))
+	      = _Ttesttype::min();
+	    constexpr auto v2 __attribute__((unused))
+	      = _Ttesttype::max();
 	  }
 	};
 
Index: testsuite/26_numerics/random/linear_congruential_engine/requirements/constexpr_data.cc
===================================================================
--- testsuite/26_numerics/random/linear_congruential_engine/requirements/constexpr_data.cc	(revision 166194)
+++ testsuite/26_numerics/random/linear_congruential_engine/requirements/constexpr_data.cc	(working copy)
@@ -33,10 +33,14 @@ 
 	{
 	  void __constraint()
 	  {
-	    constexpr auto v1(_Ttesttype::multiplier);
-	    constexpr auto v2(_Ttesttype::increment);
-	    constexpr auto v3(_Ttesttype::modulus);
-	    constexpr auto v4(_Ttesttype::default_seed);
+	    constexpr auto v1 __attribute__((unused))
+	      = _Ttesttype::multiplier;
+	    constexpr auto v2 __attribute__((unused))
+	      = _Ttesttype::increment;
+	    constexpr auto v3 __attribute__((unused))
+	      = _Ttesttype::modulus;
+	    constexpr auto v4 __attribute__((unused))
+	      = _Ttesttype::default_seed;
 	  }
 	};
 
Index: testsuite/26_numerics/random/shuffle_order_engine/requirements/constexpr_functions.cc
===================================================================
--- testsuite/26_numerics/random/shuffle_order_engine/requirements/constexpr_functions.cc	(revision 166194)
+++ testsuite/26_numerics/random/shuffle_order_engine/requirements/constexpr_functions.cc	(working copy)
@@ -33,8 +33,10 @@ 
 	{
 	  void __constraint()
 	  { 
-	    constexpr auto v1(_Ttesttype::min());
-	    constexpr auto v2(_Ttesttype::max());
+	    constexpr auto v1 __attribute__((unused))
+	      = _Ttesttype::min();
+	    constexpr auto v2 __attribute__((unused))
+	      = _Ttesttype::max();
 	  }
 	};
 
Index: testsuite/26_numerics/random/shuffle_order_engine/requirements/constexpr_data.cc
===================================================================
--- testsuite/26_numerics/random/shuffle_order_engine/requirements/constexpr_data.cc	(revision 166194)
+++ testsuite/26_numerics/random/shuffle_order_engine/requirements/constexpr_data.cc	(working copy)
@@ -33,7 +33,8 @@ 
 	{
 	  void __constraint()
 	  {
-	    constexpr auto v1(_Ttesttype::table_size);
+	    constexpr auto v1 __attribute__((unused))
+	      = _Ttesttype::table_size;
 	  }
 	};
 
Index: testsuite/26_numerics/complex/requirements/constexpr_functions.cc
===================================================================
--- testsuite/26_numerics/complex/requirements/constexpr_functions.cc	(revision 166194)
+++ testsuite/26_numerics/complex/requirements/constexpr_functions.cc	(working copy)
@@ -36,8 +36,8 @@ 
 	    typedef typename _Ttesttype::_ComplexT _ComplexT;
 	    const _ComplexT cc = { 1.1 };
 	    constexpr _Ttesttype a(cc);
-	    constexpr auto v1 = a.real();
-	    constexpr auto v2 = a.imag();
+	    constexpr auto v1 __attribute__((unused)) = a.real();
+	    constexpr auto v2 __attribute__((unused)) = a.imag();
 	  }
 	};
 
Index: testsuite/tr1/4_metaprogramming/integral_constant/requirements/constexpr_data.cc
===================================================================
--- testsuite/tr1/4_metaprogramming/integral_constant/requirements/constexpr_data.cc	(revision 166194)
+++ testsuite/tr1/4_metaprogramming/integral_constant/requirements/constexpr_data.cc	(working copy)
@@ -1,52 +0,0 @@ 
-// { dg-do compile }
-// { dg-options "-std=gnu++0x" }
-
-// Copyright (C) 2010 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 <type_traits>
-#include <testsuite_common_types.h>
-
-namespace __gnu_test
-{
-  struct constexpr_member_data
-  {
-    template<typename _Ttesttype>
-      void
-      operator()()
-      {
-	struct _Concept
-	{
-	  void __constraint()
-	  {
-	    constexpr auto v(_Ttesttype::value);
-	  }
-	};
-
-	_Concept c;
-	c.__constraint();
-      }
-  };
-}
-
-int main()
-{
-  __gnu_test::constexpr_member_data test;
-  test.operator()<std::integral_constant<unsigned short, 69>>();
-  test.operator()<std::integral_constant<bool, true>>();
-  return 0;
-}
Index: testsuite/23_containers/bitset/requirements/constexpr_functions.cc
===================================================================
--- testsuite/23_containers/bitset/requirements/constexpr_functions.cc	(revision 166194)
+++ testsuite/23_containers/bitset/requirements/constexpr_functions.cc	(working copy)
@@ -34,7 +34,7 @@ 
 	  void __constraint()
 	  { 
             constexpr _Ttesttype obj;
-            constexpr auto v1 = obj.size();
+            constexpr auto v1 __attribute__((unused)) = obj.size();
 	    //	    constexpr auto v2 = obj[4];
 	  }
 	};
Index: testsuite/23_containers/array/requirements/constexpr_functions.cc
===================================================================
--- testsuite/23_containers/array/requirements/constexpr_functions.cc	(revision 166194)
+++ testsuite/23_containers/array/requirements/constexpr_functions.cc	(working copy)
@@ -34,9 +34,9 @@ 
 	  void __constraint()
 	  { 
 	    constexpr _Ttesttype a = { };
-	    constexpr auto v1 = a.size();
-	    constexpr auto v2 = a.max_size();
-	    constexpr auto v3 = a.empty();
+	    constexpr auto v1 __attribute__((unused)) = a.size();
+	    constexpr auto v2 __attribute__((unused)) = a.max_size();
+	    constexpr auto v3 __attribute__((unused)) = a.empty();
 	  }
 	};
 
Index: testsuite/util/testsuite_common_types.h
===================================================================
--- testsuite/util/testsuite_common_types.h	(revision 166194)
+++ testsuite/util/testsuite_common_types.h	(working copy)
@@ -399,10 +399,10 @@ 
     {
       constexpr _Tp a = _Tp();
       constexpr _Tp b = _Tp();
-      constexpr _Tp c1 = a | b;
-      constexpr _Tp c2 = a & b;
-      constexpr _Tp c3 = a ^ b;
-      constexpr _Tp c4 = ~b;
+      constexpr _Tp c1 __attribute__((unused)) = a | b;
+      constexpr _Tp c2 __attribute__((unused)) = a & b;
+      constexpr _Tp c3 __attribute__((unused)) = a ^ b;
+      constexpr _Tp c4 __attribute__((unused)) = ~b;
     }
 #endif
 
@@ -562,7 +562,7 @@ 
 	struct _Concept
 	{
 	  void __constraint()
-	  { _Tp __v; }
+	  { _Tp __v __attribute__((unused)); }
 	};
 
 	void (_Concept::*__x)() __attribute__((unused))
Index: testsuite/20_util/duration/requirements/constexpr_functions.cc
===================================================================
--- testsuite/20_util/duration/requirements/constexpr_functions.cc	(revision 166194)
+++ testsuite/20_util/duration/requirements/constexpr_functions.cc	(working copy)
@@ -33,14 +33,20 @@ 
 	{
 	  void __constraint()
 	  { 
-	    constexpr auto v1(_Ttesttype::min());
-	    constexpr auto v2(_Ttesttype::max());
-	    constexpr auto v3(_Ttesttype::zero());
+	    constexpr auto v1 __attribute__((unused))
+	      = _Ttesttype::min();
+	    constexpr auto v2 __attribute__((unused))
+	      = _Ttesttype::max();
+	    constexpr auto v3 __attribute__((unused))
+	      = _Ttesttype::zero();
 
 	    constexpr _Ttesttype obj { };
-	    constexpr auto v4 = obj.count();
-	    constexpr auto v5 = -obj;
-	    constexpr auto v6 = +obj;
+	    constexpr auto v4 __attribute__((unused))
+	      = obj.count();
+	    constexpr auto v5 __attribute__((unused))
+	      = -obj;
+	    constexpr auto v6 __attribute__((unused))
+	      = +obj;
 	  }
 	};
 
Index: testsuite/20_util/duration_cast/constexpr.cc
===================================================================
--- testsuite/20_util/duration_cast/constexpr.cc	(revision 166194)
+++ testsuite/20_util/duration_cast/constexpr.cc	(working copy)
@@ -27,11 +27,11 @@ 
 
   // non-constexpr
   minutes mn1(6000);
-  hours hr1 = duration_cast<hours>(mn1);
+  hours hr1 __attribute__((unused)) = duration_cast<hours>(mn1);
 
   // constexpr
   constexpr minutes mn2(6000);
-  constexpr hours hr2 = duration_cast<hours>(mn2);
+  constexpr hours hr2 __attribute__((unused)) = duration_cast<hours>(mn2);
 
   return 0;
 }
Index: testsuite/20_util/time_point/requirements/constexpr_functions.cc
===================================================================
--- testsuite/20_util/time_point/requirements/constexpr_functions.cc	(revision 166194)
+++ testsuite/20_util/time_point/requirements/constexpr_functions.cc	(working copy)
@@ -33,11 +33,14 @@ 
 	{
 	  void __constraint()
 	  {
-	    constexpr auto v1(_Ttesttype::min());
-	    constexpr auto v2(_Ttesttype::max());
+	    constexpr auto v1 __attribute__((unused))
+	      = _Ttesttype::min();
+	    constexpr auto v2 __attribute__((unused))
+	      = _Ttesttype::max();
 
 	    constexpr _Ttesttype obj;
-	    constexpr auto v3 = obj.time_since_epoch();
+	    constexpr auto v3 __attribute__((unused))
+	      = obj.time_since_epoch();
 	  }
 	};
 
Index: testsuite/20_util/ratio/requirements/constexpr_data.cc
===================================================================
--- testsuite/20_util/ratio/requirements/constexpr_data.cc	(revision 166194)
+++ testsuite/20_util/ratio/requirements/constexpr_data.cc	(working copy)
@@ -33,8 +33,10 @@ 
 	{
 	  void __constraint()
 	  {
-	    constexpr intmax_t v1(_Ttesttype::num);
-	    constexpr intmax_t v2(_Ttesttype::den);
+	    constexpr intmax_t v1 __attribute__((unused))
+	      = _Ttesttype::num;
+	    constexpr intmax_t v2 __attribute__((unused))
+	      = _Ttesttype::den;
 	  }
 	};