This is the second round of the SD-6 support series.
I believe I have answered everyones concerns.
Built and tested on x86_64-linux.
OK?
libstdc++:
2014-06-09 Ed Smith-Rowland 3dw...@verizon.net
Implement SD-6: SG10 Feature Test Recommendations
* g++.dg/cpp1y/feat-cxx11-neg.C: New.
* g++.dg/cpp1y/feat-cxx11.C: New.
* g++.dg/cpp1y/feat-cxx14-neg.C: New.
* g++.dg/cpp1y/feat-cxx14.C: New.
* g++.dg/cpp1y/phoobhar.h: New.
* g++.dg/cpp1y/testinc/phoobhar.h: New.
* g++.dg/cpp1y/testinc/phoobhar.h: New.
Index: g++.dg/cpp1y/feat-cxx11-neg.C
===
--- g++.dg/cpp1y/feat-cxx11-neg.C (revision 0)
+++ g++.dg/cpp1y/feat-cxx11-neg.C (working copy)
@@ -0,0 +1,35 @@
+// { dg-do compile { target c++11_only } }
+
+// These *are* defined in C++14 onwards.
+
+#ifndef __cpp_binary_literals
+# error __cpp_binary_literals // { dg-error error }
+#endif
+
+#ifndef __cpp_init_captures
+# error __cpp_init_captures // { dg-error error }
+#endif
+
+#ifndef __cpp_generic_lambdas
+# error __cpp_generic_lambdas // { dg-error error }
+#endif
+
+#ifndef __cpp_decltype_auto
+# error __cpp_decltype_auto // { dg-error error }
+#endif
+
+#ifndef __cpp_return_type_deduction
+# error __cpp_return_type_deduction // { dg-error error }
+#endif
+
+#ifndef __cpp_runtime_arrays
+# error __cpp_runtime_arrays // { dg-error error }
+#endif
+
+#ifndef __cpp_digit_separators
+# error __cpp_digit_separators // { dg-error error }
+#endif
+
+#ifndef __cpp_attribute_deprecated
+# error __cpp_attribute_deprecated // { dg-error error }
+#endif
Index: g++.dg/cpp1y/feat-cxx11.C
===
--- g++.dg/cpp1y/feat-cxx11.C (revision 0)
+++ g++.dg/cpp1y/feat-cxx11.C (working copy)
@@ -0,0 +1,73 @@
+// { dg-do compile { target c++11_only } }
+
+#ifndef __cpp_unicode_characters
+# error __cpp_unicode_characters
+#elif __cpp_unicode_characters != 200704
+# error __cpp_unicode_characters != 200704
+#endif
+
+#ifndef __cpp_raw_strings
+# error __cpp_raw_strings
+#elif __cpp_raw_strings != 200710
+# error __cpp_raw_strings != 200710
+#endif
+
+#ifndef __cpp_unicode_literals
+# error __cpp_unicode_literals
+#elif __cpp_unicode_literals != 200710
+# error __cpp_unicode_literals != 200710
+#endif
+
+#ifndef __cpp_user_defined_literals
+# error __cpp_user_defined_literals
+#elif __cpp_user_defined_literals != 200809
+# error __cpp_user_defined_literals != 200809
+#endif
+
+#ifndef __cpp_lambdas
+# error __cpp_lambdas
+#elif __cpp_lambdas != 200907
+# error __cpp_lambdas != 200907
+#endif
+
+#ifndef __cpp_constexpr
+# error __cpp_constexpr
+#elif __cpp_constexpr != 200704
+# error __cpp_constexpr != 200704
+#endif
+
+#ifndef __cpp_static_assert
+# error __cpp_static_assert
+#elif __cpp_static_assert != 200410
+# error __cpp_static_assert != 200410
+#endif
+
+#ifndef __cpp_decltype
+# error __cpp_decltype
+#elif __cpp_decltype != 200707
+# error __cpp_decltype != 200707
+#endif
+
+#ifndef __cpp_attributes
+# error __cpp_attributes
+#elif __cpp_attributes != 200809
+# error __cpp_attributes != 200809
+#endif
+
+#ifndef __cpp_rvalue_reference
+# error __cpp_rvalue_reference
+#elif __cpp_rvalue_reference != 200610
+# error __cpp_rvalue_reference != 200610
+#endif
+
+#ifndef __cpp_variadic_templates
+# error __cpp_variadic_templates
+#elif __cpp_variadic_templates != 200704
+# error __cpp_variadic_templates != 200704
+#endif
+
+#ifndef __cpp_alias_templates
+# error __cpp_alias_templates
+#elif __cpp_alias_templates != 200704
+# error __cpp_alias_templates != 200704
+#endif
Index: g++.dg/cpp1y/feat-cxx14-neg.C
===
--- g++.dg/cpp1y/feat-cxx14-neg.C (revision 0)
+++ g++.dg/cpp1y/feat-cxx14-neg.C (working copy)
@@ -0,0 +1,8 @@
+// { dg-do compile { target c++1y } }
+
+// TODO: Change != to == when C++14 constexpr goes in.
+#ifndef __cpp_constexpr
+# error __cpp_constexpr
+#elif __cpp_constexpr != 200704
+# error __cpp_constexpr != 200704 // { dg-error error }
+#endif
Index: g++.dg/cpp1y/feat-cxx14.C
===
--- g++.dg/cpp1y/feat-cxx14.C (revision 0)
+++ g++.dg/cpp1y/feat-cxx14.C (working copy)
@@ -0,0 +1,187 @@
+// { dg-do compile { target c++1y } }
+// { dg-options -I . -I testinc }
+
+// Begin C++11 tests.
+
+#ifndef __cpp_unicode_characters
+# error __cpp_unicode_characters
+#endif
+
+#ifndef __cpp_raw_strings
+# error __cpp_raw_strings
+#endif
+
+#ifndef __cpp_unicode_literals
+# error __cpp_unicode_literals
+#endif
+
+#ifndef __cpp_user_defined_literals
+# error __cpp_user_defined_literals
+#endif
+
+#ifndef __cpp_lambdas
+# error __cpp_lambdas
+#endif
+
+#ifndef __cpp_constexpr
+# error __cpp_constexpr
+#endif
+
+#ifndef __cpp_static_assert
+# error __cpp_static_assert
+#endif
+
+#ifndef
