Fix <version> header for freestanding

	* include/std/version [!_GLIBCXX_HOSTED]: Do not define feature test
	macros for features that are only present in hosted builds.

From-SVN: r277849

libstdc++-v3/ChangeLog

 2019-11-05  Jonathan Wakely  <jwakely@redhat.com>
 
+	* include/std/version [!_GLIBCXX_HOSTED]: Do not define feature test
+	macros for features that are only present in hosted builds.
+
 	* include/bits/iterator_concepts.h (__iter_without_nested_types):
 	Remove incorrect comment.
 

libstdc++-v3/include/std/version

@@ -35,7 +35,9 @@
 #include <bits/c++config.h>
 
 // c++03
-#define __cpp_lib_incomplete_container_elements 201505
+#if _GLIBCXX_HOSTED
+# define __cpp_lib_incomplete_container_elements 201505
+#endif
 
 #if !defined(__STRICT_ANSI__)
 // gnu++03
@@ -44,17 +46,22 @@
 
 #if __cplusplus >= 201103L
 // c++11
-#define __cpp_lib_allocator_is_always_equal 201411
-#define __cpp_lib_allocator_traits_is_always_equal 201411
 #define __cpp_lib_is_null_pointer 201309
 #define __cpp_lib_result_of_sfinae 201210
-#define __cpp_lib_shared_ptr_arrays 201611L
+
+#if _GLIBCXX_HOSTED
+# define __cpp_lib_allocator_is_always_equal 201411
+# define __cpp_lib_allocator_traits_is_always_equal 201411
+# define __cpp_lib_shared_ptr_arrays 201611L
+#endif
 
 #if !defined(__STRICT_ANSI__)
 // gnu++11
-# define __cpp_lib_enable_shared_from_this 201603
 # define __cpp_lib_is_swappable 201603
 # define __cpp_lib_void_t 201411
+# if _GLIBCXX_HOSTED
+#  define __cpp_lib_enable_shared_from_this 201603
+# endif
 #endif
 
 // For C++11 and later we support ISO/IEC 29124 Mathematical Special Functions
@@ -62,52 +69,41 @@
 
 #if __cplusplus >= 201402L
 // c++14
-#define __cpp_lib_chrono_udls 201304
-#define __cpp_lib_complex_udls 201309
-#define __cpp_lib_exchange_function 201304
-#define __cpp_lib_generic_associative_lookup 201304
-#define __cpp_lib_integer_sequence 201304
 #define __cpp_lib_integral_constant_callable 201304
 #define __cpp_lib_is_final 201402L
-#define __cpp_lib_make_reverse_iterator 201402
-#define __cpp_lib_make_unique 201304
-#ifndef _GLIBCXX_DEBUG // PR libstdc++/70303
-# define __cpp_lib_null_iterators 201304L
-#endif
-#define __cpp_lib_quoted_string_io 201304
-#define __cpp_lib_robust_nonmodifying_seq_ops 201304
-#ifdef _GLIBCXX_HAS_GTHREADS
-# define __cpp_lib_shared_timed_mutex 201402
-#endif
-#define __cpp_lib_string_udls 201304
 #define __cpp_lib_transformation_trait_aliases 201304
-#define __cpp_lib_transparent_operators 201510
-#define __cpp_lib_tuple_element_t 201402L
-#define __cpp_lib_tuples_by_type 201304
+
+#if _GLIBCXX_HOSTED
+# define __cpp_lib_chrono_udls 201304
+# define __cpp_lib_complex_udls 201309
+# define __cpp_lib_exchange_function 201304
+# define __cpp_lib_generic_associative_lookup 201304
+# define __cpp_lib_integer_sequence 201304
+# define __cpp_lib_make_reverse_iterator 201402
+# define __cpp_lib_make_unique 201304
+# ifndef _GLIBCXX_DEBUG // PR libstdc++/70303
+#  define __cpp_lib_null_iterators 201304L
+# endif
+# define __cpp_lib_quoted_string_io 201304
+# define __cpp_lib_robust_nonmodifying_seq_ops 201304
+# ifdef _GLIBCXX_HAS_GTHREADS
+#  define __cpp_lib_shared_timed_mutex 201402
+# endif
+# define __cpp_lib_string_udls 201304
+# define __cpp_lib_transparent_operators 201510
+# define __cpp_lib_tuple_element_t 201402L
+# define __cpp_lib_tuples_by_type 201304
+#endif
 
 #if __cplusplus >= 201703L
 // c++17
 #define __cpp_lib_addressof_constexpr 201603
-#define __cpp_lib_any 201606L
-#define __cpp_lib_apply 201603
-#define __cpp_lib_array_constexpr 201803
-#define __cpp_lib_as_const 201510
 #define __cpp_lib_atomic_is_always_lock_free 201603
 #define __cpp_lib_bool_constant 201505
-#define __cpp_lib_boyer_moore_searcher 201603
 #define __cpp_lib_byte 201603
-#define __cpp_lib_chrono 201611
-#define __cpp_lib_clamp 201603
-#define __cpp_lib_constexpr_char_traits 201611
-#define __cpp_lib_enable_shared_from_this 201603
-#define __cpp_lib_filesystem 201703
-#define __cpp_lib_gcd 201606
-#define __cpp_lib_gcd_lcm 201606
 #ifdef _GLIBCXX_HAVE_BUILTIN_HAS_UNIQ_OBJ_REP
 # define __cpp_lib_has_unique_object_representations 201606
 #endif
-#define __cpp_lib_hypot 201603
-#define __cpp_lib_invoke 201411L
 #ifdef _GLIBCXX_HAVE_BUILTIN_IS_AGGREGATE
 # define __cpp_lib_is_aggregate 201703
 #endif
@@ -116,8 +112,27 @@
 #ifdef _GLIBCXX_HAVE_BUILTIN_LAUNDER
 # define __cpp_lib_launder 201606
 #endif
-#define __cpp_lib_lcm 201606
 #define __cpp_lib_logical_traits 201510
+#define __cpp_lib_type_trait_variable_templates 201510L
+#define __cpp_lib_uncaught_exceptions 201411L
+#define __cpp_lib_void_t 201411
+
+#if _GLIBCXX_HOSTED
+#define __cpp_lib_any 201606L
+#define __cpp_lib_apply 201603
+#define __cpp_lib_array_constexpr 201803
+#define __cpp_lib_as_const 201510
+#define __cpp_lib_boyer_moore_searcher 201603
+#define __cpp_lib_chrono 201611
+#define __cpp_lib_clamp 201603
+#define __cpp_lib_constexpr_char_traits 201611
+#define __cpp_lib_enable_shared_from_this 201603
+#define __cpp_lib_filesystem 201703
+#define __cpp_lib_gcd 201606
+#define __cpp_lib_gcd_lcm 201606
+#define __cpp_lib_hypot 201603
+#define __cpp_lib_invoke 201411L
+#define __cpp_lib_lcm 201606
 #define __cpp_lib_make_from_tuple 201606
 #define __cpp_lib_map_insertion 201411
 #define __cpp_lib_map_try_emplace 201411
@@ -140,39 +155,40 @@
 #define __cpp_lib_shared_ptr_weak_type 201606
 #define __cpp_lib_string_view 201803
 // #define __cpp_lib_to_chars 201611L
-#define __cpp_lib_type_trait_variable_templates 201510L
-#define __cpp_lib_uncaught_exceptions 201411L
 #define __cpp_lib_unordered_map_insertion 201411
 #define __cpp_lib_unordered_map_try_emplace 201411
 #define __cpp_lib_variant 201606L
-#define __cpp_lib_void_t 201411
 #define __cpp_lib_parallel_algorithm 201603L
+#endif
 
 #if __cplusplus > 201703L
 // c++2a
 #define __cpp_lib_atomic_ref 201806L
-#define __cpp_lib_bind_front 201907L
 #define __cpp_lib_bitops 201907L
 #define __cpp_lib_bounded_array_traits 201902L
 #if __cpp_concepts
 # define __cpp_lib_concepts 201806L
 #endif
-#define __cpp_lib_constexpr_algorithms 201806L
-#define __cpp_lib_constexpr_dynamic_alloc 201907L
-#define __cpp_lib_constexpr_invoke 201907L
 #if __cpp_impl_destroying_delete
 # define __cpp_lib_destroying_delete 201806L
 #endif
 #define __cpp_lib_endian 201907L
-#define __cpp_lib_erase_if 201900L
-#define __cpp_lib_interpolate 201902L
 #ifdef _GLIBCXX_HAVE_BUILTIN_IS_CONSTANT_EVALUATED
 # define __cpp_lib_is_constant_evaluated 201811L
 #endif
+
+#if _GLIBCXX_HOSTED
+#define __cpp_lib_bind_front 201907L
+#define __cpp_lib_constexpr_algorithms 201806L
+#define __cpp_lib_constexpr_dynamic_alloc 201907L
+#define __cpp_lib_constexpr_invoke 201907L
+#define __cpp_lib_erase_if 201900L
+#define __cpp_lib_interpolate 201902L
 #define __cpp_lib_list_remove_return_type 201806L
 #define __cpp_lib_math_constants 201907L
 #define __cpp_lib_span 201902L
 #define __cpp_lib_to_array 201907L
+#endif
 #endif // C++2a
 #endif // C++17
 #endif // C++14