[libc++][C++03] Use `__cxx03/` headers in C++03 mode (#109002)

This patch implements the forwarding to frozen C++03 headers as
discussed in
https://discourse.llvm.org/t/rfc-freezing-c-03-headers-in-libc. In the
RFC, we initially proposed selecting the right headers from the Clang
driver, however consensus seemed to steer towards handling this in the
library itself. This patch implements that direction.

At a high level, the changes basically amount to making each public
header look like this:

```
// inside <vector>
#ifdef _LIBCPP_CXX03_LANG
#  include <__cxx03/vector>
#else
  // normal <vector> content
#endif
```

In most cases, public headers are simple umbrella headers so there isn't
much code in the #else branch. In other cases, the #else branch contains
the actual implementation of the header.

GitOrigin-RevId: b9a2658a3e8bd13b0f9e7a8a440832a95b377216
diff --git a/cmake/caches/Generic-cxx03-frozen.cmake b/cmake/caches/Generic-cxx03-frozen.cmake
new file mode 100644
index 0000000..dfd158b
--- /dev/null
+++ b/cmake/caches/Generic-cxx03-frozen.cmake
@@ -0,0 +1,2 @@
+set(LIBCXX_TEST_PARAMS "std=c++03;test_frozen_cxx03_headers=True" CACHE STRING "")
+set(LIBCXXABI_TEST_PARAMS "${LIBCXX_TEST_PARAMS}" CACHE STRING "")
diff --git a/include/CMakeLists.txt b/include/CMakeLists.txt
index b5bbfbe..0b484eb 100644
--- a/include/CMakeLists.txt
+++ b/include/CMakeLists.txt
@@ -1054,6 +1054,1026 @@
   version
   wchar.h
   wctype.h
+
+# C++03 frozen headers
+  __cxx03/__algorithm/adjacent_find.h
+  __cxx03/__algorithm/all_of.h
+  __cxx03/__algorithm/any_of.h
+  __cxx03/__algorithm/binary_search.h
+  __cxx03/__algorithm/clamp.h
+  __cxx03/__algorithm/comp.h
+  __cxx03/__algorithm/comp_ref_type.h
+  __cxx03/__algorithm/copy.h
+  __cxx03/__algorithm/copy_backward.h
+  __cxx03/__algorithm/copy_if.h
+  __cxx03/__algorithm/copy_move_common.h
+  __cxx03/__algorithm/copy_n.h
+  __cxx03/__algorithm/count.h
+  __cxx03/__algorithm/count_if.h
+  __cxx03/__algorithm/equal.h
+  __cxx03/__algorithm/equal_range.h
+  __cxx03/__algorithm/fill.h
+  __cxx03/__algorithm/fill_n.h
+  __cxx03/__algorithm/find.h
+  __cxx03/__algorithm/find_end.h
+  __cxx03/__algorithm/find_first_of.h
+  __cxx03/__algorithm/find_if.h
+  __cxx03/__algorithm/find_if_not.h
+  __cxx03/__algorithm/find_segment_if.h
+  __cxx03/__algorithm/fold.h
+  __cxx03/__algorithm/for_each.h
+  __cxx03/__algorithm/for_each_n.h
+  __cxx03/__algorithm/for_each_segment.h
+  __cxx03/__algorithm/generate.h
+  __cxx03/__algorithm/generate_n.h
+  __cxx03/__algorithm/half_positive.h
+  __cxx03/__algorithm/in_found_result.h
+  __cxx03/__algorithm/in_fun_result.h
+  __cxx03/__algorithm/in_in_out_result.h
+  __cxx03/__algorithm/in_in_result.h
+  __cxx03/__algorithm/in_out_out_result.h
+  __cxx03/__algorithm/in_out_result.h
+  __cxx03/__algorithm/includes.h
+  __cxx03/__algorithm/inplace_merge.h
+  __cxx03/__algorithm/is_heap.h
+  __cxx03/__algorithm/is_heap_until.h
+  __cxx03/__algorithm/is_partitioned.h
+  __cxx03/__algorithm/is_permutation.h
+  __cxx03/__algorithm/is_sorted.h
+  __cxx03/__algorithm/is_sorted_until.h
+  __cxx03/__algorithm/iter_swap.h
+  __cxx03/__algorithm/iterator_operations.h
+  __cxx03/__algorithm/lexicographical_compare.h
+  __cxx03/__algorithm/lexicographical_compare_three_way.h
+  __cxx03/__algorithm/lower_bound.h
+  __cxx03/__algorithm/make_heap.h
+  __cxx03/__algorithm/make_projected.h
+  __cxx03/__algorithm/max.h
+  __cxx03/__algorithm/max_element.h
+  __cxx03/__algorithm/merge.h
+  __cxx03/__algorithm/min.h
+  __cxx03/__algorithm/min_element.h
+  __cxx03/__algorithm/min_max_result.h
+  __cxx03/__algorithm/minmax.h
+  __cxx03/__algorithm/minmax_element.h
+  __cxx03/__algorithm/mismatch.h
+  __cxx03/__algorithm/move.h
+  __cxx03/__algorithm/move_backward.h
+  __cxx03/__algorithm/next_permutation.h
+  __cxx03/__algorithm/none_of.h
+  __cxx03/__algorithm/nth_element.h
+  __cxx03/__algorithm/partial_sort.h
+  __cxx03/__algorithm/partial_sort_copy.h
+  __cxx03/__algorithm/partition.h
+  __cxx03/__algorithm/partition_copy.h
+  __cxx03/__algorithm/partition_point.h
+  __cxx03/__algorithm/pop_heap.h
+  __cxx03/__algorithm/prev_permutation.h
+  __cxx03/__algorithm/pstl.h
+  __cxx03/__algorithm/push_heap.h
+  __cxx03/__algorithm/ranges_adjacent_find.h
+  __cxx03/__algorithm/ranges_all_of.h
+  __cxx03/__algorithm/ranges_any_of.h
+  __cxx03/__algorithm/ranges_binary_search.h
+  __cxx03/__algorithm/ranges_clamp.h
+  __cxx03/__algorithm/ranges_contains.h
+  __cxx03/__algorithm/ranges_contains_subrange.h
+  __cxx03/__algorithm/ranges_copy.h
+  __cxx03/__algorithm/ranges_copy_backward.h
+  __cxx03/__algorithm/ranges_copy_if.h
+  __cxx03/__algorithm/ranges_copy_n.h
+  __cxx03/__algorithm/ranges_count.h
+  __cxx03/__algorithm/ranges_count_if.h
+  __cxx03/__algorithm/ranges_ends_with.h
+  __cxx03/__algorithm/ranges_equal.h
+  __cxx03/__algorithm/ranges_equal_range.h
+  __cxx03/__algorithm/ranges_fill.h
+  __cxx03/__algorithm/ranges_fill_n.h
+  __cxx03/__algorithm/ranges_find.h
+  __cxx03/__algorithm/ranges_find_end.h
+  __cxx03/__algorithm/ranges_find_first_of.h
+  __cxx03/__algorithm/ranges_find_if.h
+  __cxx03/__algorithm/ranges_find_if_not.h
+  __cxx03/__algorithm/ranges_find_last.h
+  __cxx03/__algorithm/ranges_for_each.h
+  __cxx03/__algorithm/ranges_for_each_n.h
+  __cxx03/__algorithm/ranges_generate.h
+  __cxx03/__algorithm/ranges_generate_n.h
+  __cxx03/__algorithm/ranges_includes.h
+  __cxx03/__algorithm/ranges_inplace_merge.h
+  __cxx03/__algorithm/ranges_is_heap.h
+  __cxx03/__algorithm/ranges_is_heap_until.h
+  __cxx03/__algorithm/ranges_is_partitioned.h
+  __cxx03/__algorithm/ranges_is_permutation.h
+  __cxx03/__algorithm/ranges_is_sorted.h
+  __cxx03/__algorithm/ranges_is_sorted_until.h
+  __cxx03/__algorithm/ranges_iterator_concept.h
+  __cxx03/__algorithm/ranges_lexicographical_compare.h
+  __cxx03/__algorithm/ranges_lower_bound.h
+  __cxx03/__algorithm/ranges_make_heap.h
+  __cxx03/__algorithm/ranges_max.h
+  __cxx03/__algorithm/ranges_max_element.h
+  __cxx03/__algorithm/ranges_merge.h
+  __cxx03/__algorithm/ranges_min.h
+  __cxx03/__algorithm/ranges_min_element.h
+  __cxx03/__algorithm/ranges_minmax.h
+  __cxx03/__algorithm/ranges_minmax_element.h
+  __cxx03/__algorithm/ranges_mismatch.h
+  __cxx03/__algorithm/ranges_move.h
+  __cxx03/__algorithm/ranges_move_backward.h
+  __cxx03/__algorithm/ranges_next_permutation.h
+  __cxx03/__algorithm/ranges_none_of.h
+  __cxx03/__algorithm/ranges_nth_element.h
+  __cxx03/__algorithm/ranges_partial_sort.h
+  __cxx03/__algorithm/ranges_partial_sort_copy.h
+  __cxx03/__algorithm/ranges_partition.h
+  __cxx03/__algorithm/ranges_partition_copy.h
+  __cxx03/__algorithm/ranges_partition_point.h
+  __cxx03/__algorithm/ranges_pop_heap.h
+  __cxx03/__algorithm/ranges_prev_permutation.h
+  __cxx03/__algorithm/ranges_push_heap.h
+  __cxx03/__algorithm/ranges_remove.h
+  __cxx03/__algorithm/ranges_remove_copy.h
+  __cxx03/__algorithm/ranges_remove_copy_if.h
+  __cxx03/__algorithm/ranges_remove_if.h
+  __cxx03/__algorithm/ranges_replace.h
+  __cxx03/__algorithm/ranges_replace_copy.h
+  __cxx03/__algorithm/ranges_replace_copy_if.h
+  __cxx03/__algorithm/ranges_replace_if.h
+  __cxx03/__algorithm/ranges_reverse.h
+  __cxx03/__algorithm/ranges_reverse_copy.h
+  __cxx03/__algorithm/ranges_rotate.h
+  __cxx03/__algorithm/ranges_rotate_copy.h
+  __cxx03/__algorithm/ranges_sample.h
+  __cxx03/__algorithm/ranges_search.h
+  __cxx03/__algorithm/ranges_search_n.h
+  __cxx03/__algorithm/ranges_set_difference.h
+  __cxx03/__algorithm/ranges_set_intersection.h
+  __cxx03/__algorithm/ranges_set_symmetric_difference.h
+  __cxx03/__algorithm/ranges_set_union.h
+  __cxx03/__algorithm/ranges_shuffle.h
+  __cxx03/__algorithm/ranges_sort.h
+  __cxx03/__algorithm/ranges_sort_heap.h
+  __cxx03/__algorithm/ranges_stable_partition.h
+  __cxx03/__algorithm/ranges_stable_sort.h
+  __cxx03/__algorithm/ranges_starts_with.h
+  __cxx03/__algorithm/ranges_swap_ranges.h
+  __cxx03/__algorithm/ranges_transform.h
+  __cxx03/__algorithm/ranges_unique.h
+  __cxx03/__algorithm/ranges_unique_copy.h
+  __cxx03/__algorithm/ranges_upper_bound.h
+  __cxx03/__algorithm/remove.h
+  __cxx03/__algorithm/remove_copy.h
+  __cxx03/__algorithm/remove_copy_if.h
+  __cxx03/__algorithm/remove_if.h
+  __cxx03/__algorithm/replace.h
+  __cxx03/__algorithm/replace_copy.h
+  __cxx03/__algorithm/replace_copy_if.h
+  __cxx03/__algorithm/replace_if.h
+  __cxx03/__algorithm/reverse.h
+  __cxx03/__algorithm/reverse_copy.h
+  __cxx03/__algorithm/rotate.h
+  __cxx03/__algorithm/rotate_copy.h
+  __cxx03/__algorithm/sample.h
+  __cxx03/__algorithm/search.h
+  __cxx03/__algorithm/search_n.h
+  __cxx03/__algorithm/set_difference.h
+  __cxx03/__algorithm/set_intersection.h
+  __cxx03/__algorithm/set_symmetric_difference.h
+  __cxx03/__algorithm/set_union.h
+  __cxx03/__algorithm/shift_left.h
+  __cxx03/__algorithm/shift_right.h
+  __cxx03/__algorithm/shuffle.h
+  __cxx03/__algorithm/sift_down.h
+  __cxx03/__algorithm/simd_utils.h
+  __cxx03/__algorithm/sort.h
+  __cxx03/__algorithm/sort_heap.h
+  __cxx03/__algorithm/stable_partition.h
+  __cxx03/__algorithm/stable_sort.h
+  __cxx03/__algorithm/swap_ranges.h
+  __cxx03/__algorithm/three_way_comp_ref_type.h
+  __cxx03/__algorithm/transform.h
+  __cxx03/__algorithm/uniform_random_bit_generator_adaptor.h
+  __cxx03/__algorithm/unique.h
+  __cxx03/__algorithm/unique_copy.h
+  __cxx03/__algorithm/unwrap_iter.h
+  __cxx03/__algorithm/unwrap_range.h
+  __cxx03/__algorithm/upper_bound.h
+  __cxx03/__assert
+  __cxx03/__atomic/aliases.h
+  __cxx03/__atomic/atomic.h
+  __cxx03/__atomic/atomic_base.h
+  __cxx03/__atomic/atomic_flag.h
+  __cxx03/__atomic/atomic_init.h
+  __cxx03/__atomic/atomic_lock_free.h
+  __cxx03/__atomic/atomic_ref.h
+  __cxx03/__atomic/atomic_sync.h
+  __cxx03/__atomic/check_memory_order.h
+  __cxx03/__atomic/contention_t.h
+  __cxx03/__atomic/cxx_atomic_impl.h
+  __cxx03/__atomic/fence.h
+  __cxx03/__atomic/is_always_lock_free.h
+  __cxx03/__atomic/kill_dependency.h
+  __cxx03/__atomic/memory_order.h
+  __cxx03/__atomic/to_gcc_order.h
+  __cxx03/__bit/bit_cast.h
+  __cxx03/__bit/bit_ceil.h
+  __cxx03/__bit/bit_floor.h
+  __cxx03/__bit/bit_log2.h
+  __cxx03/__bit/bit_width.h
+  __cxx03/__bit/blsr.h
+  __cxx03/__bit/byteswap.h
+  __cxx03/__bit/countl.h
+  __cxx03/__bit/countr.h
+  __cxx03/__bit/endian.h
+  __cxx03/__bit/has_single_bit.h
+  __cxx03/__bit/invert_if.h
+  __cxx03/__bit/popcount.h
+  __cxx03/__bit/rotate.h
+  __cxx03/__bit_reference
+  __cxx03/__charconv/chars_format.h
+  __cxx03/__charconv/from_chars_integral.h
+  __cxx03/__charconv/from_chars_result.h
+  __cxx03/__charconv/tables.h
+  __cxx03/__charconv/to_chars.h
+  __cxx03/__charconv/to_chars_base_10.h
+  __cxx03/__charconv/to_chars_floating_point.h
+  __cxx03/__charconv/to_chars_integral.h
+  __cxx03/__charconv/to_chars_result.h
+  __cxx03/__charconv/traits.h
+  __cxx03/__chrono/calendar.h
+  __cxx03/__chrono/concepts.h
+  __cxx03/__chrono/convert_to_timespec.h
+  __cxx03/__chrono/convert_to_tm.h
+  __cxx03/__chrono/day.h
+  __cxx03/__chrono/duration.h
+  __cxx03/__chrono/exception.h
+  __cxx03/__chrono/file_clock.h
+  __cxx03/__chrono/formatter.h
+  __cxx03/__chrono/hh_mm_ss.h
+  __cxx03/__chrono/high_resolution_clock.h
+  __cxx03/__chrono/leap_second.h
+  __cxx03/__chrono/literals.h
+  __cxx03/__chrono/local_info.h
+  __cxx03/__chrono/month.h
+  __cxx03/__chrono/month_weekday.h
+  __cxx03/__chrono/monthday.h
+  __cxx03/__chrono/ostream.h
+  __cxx03/__chrono/parser_std_format_spec.h
+  __cxx03/__chrono/statically_widen.h
+  __cxx03/__chrono/steady_clock.h
+  __cxx03/__chrono/sys_info.h
+  __cxx03/__chrono/system_clock.h
+  __cxx03/__chrono/time_point.h
+  __cxx03/__chrono/time_zone.h
+  __cxx03/__chrono/time_zone_link.h
+  __cxx03/__chrono/tzdb.h
+  __cxx03/__chrono/tzdb_list.h
+  __cxx03/__chrono/weekday.h
+  __cxx03/__chrono/year.h
+  __cxx03/__chrono/year_month.h
+  __cxx03/__chrono/year_month_day.h
+  __cxx03/__chrono/year_month_weekday.h
+  __cxx03/__chrono/zoned_time.h
+  __cxx03/__compare/common_comparison_category.h
+  __cxx03/__compare/compare_partial_order_fallback.h
+  __cxx03/__compare/compare_strong_order_fallback.h
+  __cxx03/__compare/compare_three_way.h
+  __cxx03/__compare/compare_three_way_result.h
+  __cxx03/__compare/compare_weak_order_fallback.h
+  __cxx03/__compare/is_eq.h
+  __cxx03/__compare/ordering.h
+  __cxx03/__compare/partial_order.h
+  __cxx03/__compare/strong_order.h
+  __cxx03/__compare/synth_three_way.h
+  __cxx03/__compare/three_way_comparable.h
+  __cxx03/__compare/weak_order.h
+  __cxx03/__concepts/arithmetic.h
+  __cxx03/__concepts/assignable.h
+  __cxx03/__concepts/boolean_testable.h
+  __cxx03/__concepts/class_or_enum.h
+  __cxx03/__concepts/common_reference_with.h
+  __cxx03/__concepts/common_with.h
+  __cxx03/__concepts/constructible.h
+  __cxx03/__concepts/convertible_to.h
+  __cxx03/__concepts/copyable.h
+  __cxx03/__concepts/derived_from.h
+  __cxx03/__concepts/destructible.h
+  __cxx03/__concepts/different_from.h
+  __cxx03/__concepts/equality_comparable.h
+  __cxx03/__concepts/invocable.h
+  __cxx03/__concepts/movable.h
+  __cxx03/__concepts/predicate.h
+  __cxx03/__concepts/regular.h
+  __cxx03/__concepts/relation.h
+  __cxx03/__concepts/same_as.h
+  __cxx03/__concepts/semiregular.h
+  __cxx03/__concepts/swappable.h
+  __cxx03/__concepts/totally_ordered.h
+  __cxx03/__condition_variable/condition_variable.h
+  __cxx03/__config
+  __cxx03/__configuration/abi.h
+  __cxx03/__configuration/availability.h
+  __cxx03/__configuration/compiler.h
+  __cxx03/__configuration/config_site_shim.h
+  __cxx03/__configuration/language.h
+  __cxx03/__configuration/platform.h
+  __cxx03/__coroutine/coroutine_handle.h
+  __cxx03/__coroutine/coroutine_traits.h
+  __cxx03/__coroutine/noop_coroutine_handle.h
+  __cxx03/__coroutine/trivial_awaitables.h
+  __cxx03/__debug_utils/randomize_range.h
+  __cxx03/__debug_utils/sanitizers.h
+  __cxx03/__debug_utils/strict_weak_ordering_check.h
+  __cxx03/__exception/exception.h
+  __cxx03/__exception/exception_ptr.h
+  __cxx03/__exception/nested_exception.h
+  __cxx03/__exception/operations.h
+  __cxx03/__exception/terminate.h
+  __cxx03/__expected/bad_expected_access.h
+  __cxx03/__expected/expected.h
+  __cxx03/__expected/unexpect.h
+  __cxx03/__expected/unexpected.h
+  __cxx03/__filesystem/copy_options.h
+  __cxx03/__filesystem/directory_entry.h
+  __cxx03/__filesystem/directory_iterator.h
+  __cxx03/__filesystem/directory_options.h
+  __cxx03/__filesystem/file_status.h
+  __cxx03/__filesystem/file_time_type.h
+  __cxx03/__filesystem/file_type.h
+  __cxx03/__filesystem/filesystem_error.h
+  __cxx03/__filesystem/operations.h
+  __cxx03/__filesystem/path.h
+  __cxx03/__filesystem/path_iterator.h
+  __cxx03/__filesystem/perm_options.h
+  __cxx03/__filesystem/perms.h
+  __cxx03/__filesystem/recursive_directory_iterator.h
+  __cxx03/__filesystem/space_info.h
+  __cxx03/__filesystem/u8path.h
+  __cxx03/__format/buffer.h
+  __cxx03/__format/concepts.h
+  __cxx03/__format/container_adaptor.h
+  __cxx03/__format/enable_insertable.h
+  __cxx03/__format/escaped_output_table.h
+  __cxx03/__format/extended_grapheme_cluster_table.h
+  __cxx03/__format/format_arg.h
+  __cxx03/__format/format_arg_store.h
+  __cxx03/__format/format_args.h
+  __cxx03/__format/format_context.h
+  __cxx03/__format/format_error.h
+  __cxx03/__format/format_functions.h
+  __cxx03/__format/format_parse_context.h
+  __cxx03/__format/format_string.h
+  __cxx03/__format/format_to_n_result.h
+  __cxx03/__format/formatter.h
+  __cxx03/__format/formatter_bool.h
+  __cxx03/__format/formatter_char.h
+  __cxx03/__format/formatter_floating_point.h
+  __cxx03/__format/formatter_integer.h
+  __cxx03/__format/formatter_integral.h
+  __cxx03/__format/formatter_output.h
+  __cxx03/__format/formatter_pointer.h
+  __cxx03/__format/formatter_string.h
+  __cxx03/__format/formatter_tuple.h
+  __cxx03/__format/indic_conjunct_break_table.h
+  __cxx03/__format/parser_std_format_spec.h
+  __cxx03/__format/range_default_formatter.h
+  __cxx03/__format/range_formatter.h
+  __cxx03/__format/unicode.h
+  __cxx03/__format/width_estimation_table.h
+  __cxx03/__format/write_escaped.h
+  __cxx03/__functional/binary_function.h
+  __cxx03/__functional/binary_negate.h
+  __cxx03/__functional/bind.h
+  __cxx03/__functional/bind_back.h
+  __cxx03/__functional/bind_front.h
+  __cxx03/__functional/binder1st.h
+  __cxx03/__functional/binder2nd.h
+  __cxx03/__functional/boyer_moore_searcher.h
+  __cxx03/__functional/compose.h
+  __cxx03/__functional/default_searcher.h
+  __cxx03/__functional/function.h
+  __cxx03/__functional/hash.h
+  __cxx03/__functional/identity.h
+  __cxx03/__functional/invoke.h
+  __cxx03/__functional/is_transparent.h
+  __cxx03/__functional/mem_fn.h
+  __cxx03/__functional/mem_fun_ref.h
+  __cxx03/__functional/not_fn.h
+  __cxx03/__functional/operations.h
+  __cxx03/__functional/perfect_forward.h
+  __cxx03/__functional/pointer_to_binary_function.h
+  __cxx03/__functional/pointer_to_unary_function.h
+  __cxx03/__functional/ranges_operations.h
+  __cxx03/__functional/reference_wrapper.h
+  __cxx03/__functional/unary_function.h
+  __cxx03/__functional/unary_negate.h
+  __cxx03/__functional/weak_result_type.h
+  __cxx03/__fwd/array.h
+  __cxx03/__fwd/bit_reference.h
+  __cxx03/__fwd/complex.h
+  __cxx03/__fwd/deque.h
+  __cxx03/__fwd/format.h
+  __cxx03/__fwd/fstream.h
+  __cxx03/__fwd/functional.h
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+  __cxx03/__utility/convert_to_integral.h
+  __cxx03/__utility/declval.h
+  __cxx03/__utility/empty.h
+  __cxx03/__utility/exception_guard.h
+  __cxx03/__utility/exchange.h
+  __cxx03/__utility/forward.h
+  __cxx03/__utility/forward_like.h
+  __cxx03/__utility/in_place.h
+  __cxx03/__utility/integer_sequence.h
+  __cxx03/__utility/is_pointer_in_range.h
+  __cxx03/__utility/is_valid_range.h
+  __cxx03/__utility/move.h
+  __cxx03/__utility/no_destroy.h
+  __cxx03/__utility/pair.h
+  __cxx03/__utility/piecewise_construct.h
+  __cxx03/__utility/priority_tag.h
+  __cxx03/__utility/private_constructor_tag.h
+  __cxx03/__utility/rel_ops.h
+  __cxx03/__utility/small_buffer.h
+  __cxx03/__utility/swap.h
+  __cxx03/__utility/to_underlying.h
+  __cxx03/__utility/unreachable.h
+  __cxx03/__variant/monostate.h
+  __cxx03/__verbose_abort
+  __cxx03/algorithm
+  __cxx03/any
+  __cxx03/array
+  __cxx03/atomic
+  __cxx03/barrier
+  __cxx03/bit
+  __cxx03/bitset
+  __cxx03/cassert
+  __cxx03/ccomplex
+  __cxx03/cctype
+  __cxx03/cerrno
+  __cxx03/cfenv
+  __cxx03/cfloat
+  __cxx03/charconv
+  __cxx03/chrono
+  __cxx03/cinttypes
+  __cxx03/ciso646
+  __cxx03/climits
+  __cxx03/clocale
+  __cxx03/cmath
+  __cxx03/codecvt
+  __cxx03/compare
+  __cxx03/complex
+  __cxx03/complex.h
+  __cxx03/concepts
+  __cxx03/condition_variable
+  __cxx03/coroutine
+  __cxx03/csetjmp
+  __cxx03/csignal
+  __cxx03/cstdarg
+  __cxx03/cstdbool
+  __cxx03/cstddef
+  __cxx03/cstdint
+  __cxx03/cstdio
+  __cxx03/cstdlib
+  __cxx03/cstring
+  __cxx03/ctgmath
+  __cxx03/ctime
+  __cxx03/ctype.h
+  __cxx03/cuchar
+  __cxx03/cwchar
+  __cxx03/cwctype
+  __cxx03/deque
+  __cxx03/errno.h
+  __cxx03/exception
+  __cxx03/execution
+  __cxx03/expected
+  __cxx03/experimental/__config
+  __cxx03/experimental/__simd/aligned_tag.h
+  __cxx03/experimental/__simd/declaration.h
+  __cxx03/experimental/__simd/reference.h
+  __cxx03/experimental/__simd/scalar.h
+  __cxx03/experimental/__simd/simd.h
+  __cxx03/experimental/__simd/simd_mask.h
+  __cxx03/experimental/__simd/traits.h
+  __cxx03/experimental/__simd/utility.h
+  __cxx03/experimental/__simd/vec_ext.h
+  __cxx03/experimental/iterator
+  __cxx03/experimental/memory
+  __cxx03/experimental/propagate_const
+  __cxx03/experimental/simd
+  __cxx03/experimental/type_traits
+  __cxx03/experimental/utility
+  __cxx03/ext/__hash
+  __cxx03/ext/hash_map
+  __cxx03/ext/hash_set
+  __cxx03/fenv.h
+  __cxx03/filesystem
+  __cxx03/float.h
+  __cxx03/format
+  __cxx03/forward_list
+  __cxx03/fstream
+  __cxx03/functional
+  __cxx03/future
+  __cxx03/initializer_list
+  __cxx03/inttypes.h
+  __cxx03/iomanip
+  __cxx03/ios
+  __cxx03/iosfwd
+  __cxx03/iostream
+  __cxx03/istream
+  __cxx03/iterator
+  __cxx03/latch
+  __cxx03/limits
+  __cxx03/list
+  __cxx03/locale
+  __cxx03/locale.h
+  __cxx03/map
+  __cxx03/math.h
+  __cxx03/mdspan
+  __cxx03/memory
+  __cxx03/memory_resource
+  __cxx03/module.modulemap
+  __cxx03/mutex
+  __cxx03/new
+  __cxx03/numbers
+  __cxx03/numeric
+  __cxx03/optional
+  __cxx03/ostream
+  __cxx03/print
+  __cxx03/queue
+  __cxx03/random
+  __cxx03/ranges
+  __cxx03/ratio
+  __cxx03/regex
+  __cxx03/scoped_allocator
+  __cxx03/semaphore
+  __cxx03/set
+  __cxx03/shared_mutex
+  __cxx03/source_location
+  __cxx03/span
+  __cxx03/sstream
+  __cxx03/stack
+  __cxx03/stdatomic.h
+  __cxx03/stdbool.h
+  __cxx03/stddef.h
+  __cxx03/stdexcept
+  __cxx03/stdint.h
+  __cxx03/stdio.h
+  __cxx03/stdlib.h
+  __cxx03/stop_token
+  __cxx03/streambuf
+  __cxx03/string
+  __cxx03/string.h
+  __cxx03/string_view
+  __cxx03/strstream
+  __cxx03/syncstream
+  __cxx03/system_error
+  __cxx03/tgmath.h
+  __cxx03/thread
+  __cxx03/tuple
+  __cxx03/type_traits
+  __cxx03/typeindex
+  __cxx03/typeinfo
+  __cxx03/uchar.h
+  __cxx03/unordered_map
+  __cxx03/unordered_set
+  __cxx03/utility
+  __cxx03/valarray
+  __cxx03/variant
+  __cxx03/vector
+  __cxx03/version
+  __cxx03/wchar.h
+  __cxx03/wctype.h
   )
 
 configure_file("__config_site.in" "${LIBCXX_GENERATED_INCLUDE_TARGET_DIR}/__config_site" @ONLY)
diff --git a/include/__cxx03/CMakeLists.txt b/include/__cxx03/CMakeLists.txt
deleted file mode 100644
index b61442d..0000000
--- a/include/__cxx03/CMakeLists.txt
+++ /dev/null
@@ -1,1092 +0,0 @@
-set(files
-  __algorithm/adjacent_find.h
-  __algorithm/all_of.h
-  __algorithm/any_of.h
-  __algorithm/binary_search.h
-  __algorithm/clamp.h
-  __algorithm/comp.h
-  __algorithm/comp_ref_type.h
-  __algorithm/copy.h
-  __algorithm/copy_backward.h
-  __algorithm/copy_if.h
-  __algorithm/copy_move_common.h
-  __algorithm/copy_n.h
-  __algorithm/count.h
-  __algorithm/count_if.h
-  __algorithm/equal.h
-  __algorithm/equal_range.h
-  __algorithm/fill.h
-  __algorithm/fill_n.h
-  __algorithm/find.h
-  __algorithm/find_end.h
-  __algorithm/find_first_of.h
-  __algorithm/find_if.h
-  __algorithm/find_if_not.h
-  __algorithm/find_segment_if.h
-  __algorithm/fold.h
-  __algorithm/for_each.h
-  __algorithm/for_each_n.h
-  __algorithm/for_each_segment.h
-  __algorithm/generate.h
-  __algorithm/generate_n.h
-  __algorithm/half_positive.h
-  __algorithm/in_found_result.h
-  __algorithm/in_fun_result.h
-  __algorithm/in_in_out_result.h
-  __algorithm/in_in_result.h
-  __algorithm/in_out_out_result.h
-  __algorithm/in_out_result.h
-  __algorithm/includes.h
-  __algorithm/inplace_merge.h
-  __algorithm/is_heap.h
-  __algorithm/is_heap_until.h
-  __algorithm/is_partitioned.h
-  __algorithm/is_permutation.h
-  __algorithm/is_sorted.h
-  __algorithm/is_sorted_until.h
-  __algorithm/iter_swap.h
-  __algorithm/iterator_operations.h
-  __algorithm/lexicographical_compare.h
-  __algorithm/lexicographical_compare_three_way.h
-  __algorithm/lower_bound.h
-  __algorithm/make_heap.h
-  __algorithm/make_projected.h
-  __algorithm/max.h
-  __algorithm/max_element.h
-  __algorithm/merge.h
-  __algorithm/min.h
-  __algorithm/min_element.h
-  __algorithm/min_max_result.h
-  __algorithm/minmax.h
-  __algorithm/minmax_element.h
-  __algorithm/mismatch.h
-  __algorithm/move.h
-  __algorithm/move_backward.h
-  __algorithm/next_permutation.h
-  __algorithm/none_of.h
-  __algorithm/nth_element.h
-  __algorithm/partial_sort.h
-  __algorithm/partial_sort_copy.h
-  __algorithm/partition.h
-  __algorithm/partition_copy.h
-  __algorithm/partition_point.h
-  __algorithm/pop_heap.h
-  __algorithm/prev_permutation.h
-  __algorithm/pstl.h
-  __algorithm/push_heap.h
-  __algorithm/ranges_adjacent_find.h
-  __algorithm/ranges_all_of.h
-  __algorithm/ranges_any_of.h
-  __algorithm/ranges_binary_search.h
-  __algorithm/ranges_clamp.h
-  __algorithm/ranges_contains.h
-  __algorithm/ranges_contains_subrange.h
-  __algorithm/ranges_copy.h
-  __algorithm/ranges_copy_backward.h
-  __algorithm/ranges_copy_if.h
-  __algorithm/ranges_copy_n.h
-  __algorithm/ranges_count.h
-  __algorithm/ranges_count_if.h
-  __algorithm/ranges_ends_with.h
-  __algorithm/ranges_equal.h
-  __algorithm/ranges_equal_range.h
-  __algorithm/ranges_fill.h
-  __algorithm/ranges_fill_n.h
-  __algorithm/ranges_find.h
-  __algorithm/ranges_find_end.h
-  __algorithm/ranges_find_first_of.h
-  __algorithm/ranges_find_if.h
-  __algorithm/ranges_find_if_not.h
-  __algorithm/ranges_find_last.h
-  __algorithm/ranges_for_each.h
-  __algorithm/ranges_for_each_n.h
-  __algorithm/ranges_generate.h
-  __algorithm/ranges_generate_n.h
-  __algorithm/ranges_includes.h
-  __algorithm/ranges_inplace_merge.h
-  __algorithm/ranges_is_heap.h
-  __algorithm/ranges_is_heap_until.h
-  __algorithm/ranges_is_partitioned.h
-  __algorithm/ranges_is_permutation.h
-  __algorithm/ranges_is_sorted.h
-  __algorithm/ranges_is_sorted_until.h
-  __algorithm/ranges_iterator_concept.h
-  __algorithm/ranges_lexicographical_compare.h
-  __algorithm/ranges_lower_bound.h
-  __algorithm/ranges_make_heap.h
-  __algorithm/ranges_max.h
-  __algorithm/ranges_max_element.h
-  __algorithm/ranges_merge.h
-  __algorithm/ranges_min.h
-  __algorithm/ranges_min_element.h
-  __algorithm/ranges_minmax.h
-  __algorithm/ranges_minmax_element.h
-  __algorithm/ranges_mismatch.h
-  __algorithm/ranges_move.h
-  __algorithm/ranges_move_backward.h
-  __algorithm/ranges_next_permutation.h
-  __algorithm/ranges_none_of.h
-  __algorithm/ranges_nth_element.h
-  __algorithm/ranges_partial_sort.h
-  __algorithm/ranges_partial_sort_copy.h
-  __algorithm/ranges_partition.h
-  __algorithm/ranges_partition_copy.h
-  __algorithm/ranges_partition_point.h
-  __algorithm/ranges_pop_heap.h
-  __algorithm/ranges_prev_permutation.h
-  __algorithm/ranges_push_heap.h
-  __algorithm/ranges_remove.h
-  __algorithm/ranges_remove_copy.h
-  __algorithm/ranges_remove_copy_if.h
-  __algorithm/ranges_remove_if.h
-  __algorithm/ranges_replace.h
-  __algorithm/ranges_replace_copy.h
-  __algorithm/ranges_replace_copy_if.h
-  __algorithm/ranges_replace_if.h
-  __algorithm/ranges_reverse.h
-  __algorithm/ranges_reverse_copy.h
-  __algorithm/ranges_rotate.h
-  __algorithm/ranges_rotate_copy.h
-  __algorithm/ranges_sample.h
-  __algorithm/ranges_search.h
-  __algorithm/ranges_search_n.h
-  __algorithm/ranges_set_difference.h
-  __algorithm/ranges_set_intersection.h
-  __algorithm/ranges_set_symmetric_difference.h
-  __algorithm/ranges_set_union.h
-  __algorithm/ranges_shuffle.h
-  __algorithm/ranges_sort.h
-  __algorithm/ranges_sort_heap.h
-  __algorithm/ranges_stable_partition.h
-  __algorithm/ranges_stable_sort.h
-  __algorithm/ranges_starts_with.h
-  __algorithm/ranges_swap_ranges.h
-  __algorithm/ranges_transform.h
-  __algorithm/ranges_unique.h
-  __algorithm/ranges_unique_copy.h
-  __algorithm/ranges_upper_bound.h
-  __algorithm/remove.h
-  __algorithm/remove_copy.h
-  __algorithm/remove_copy_if.h
-  __algorithm/remove_if.h
-  __algorithm/replace.h
-  __algorithm/replace_copy.h
-  __algorithm/replace_copy_if.h
-  __algorithm/replace_if.h
-  __algorithm/reverse.h
-  __algorithm/reverse_copy.h
-  __algorithm/rotate.h
-  __algorithm/rotate_copy.h
-  __algorithm/sample.h
-  __algorithm/search.h
-  __algorithm/search_n.h
-  __algorithm/set_difference.h
-  __algorithm/set_intersection.h
-  __algorithm/set_symmetric_difference.h
-  __algorithm/set_union.h
-  __algorithm/shift_left.h
-  __algorithm/shift_right.h
-  __algorithm/shuffle.h
-  __algorithm/sift_down.h
-  __algorithm/simd_utils.h
-  __algorithm/sort.h
-  __algorithm/sort_heap.h
-  __algorithm/stable_partition.h
-  __algorithm/stable_sort.h
-  __algorithm/swap_ranges.h
-  __algorithm/three_way_comp_ref_type.h
-  __algorithm/transform.h
-  __algorithm/uniform_random_bit_generator_adaptor.h
-  __algorithm/unique.h
-  __algorithm/unique_copy.h
-  __algorithm/unwrap_iter.h
-  __algorithm/unwrap_range.h
-  __algorithm/upper_bound.h
-  __assert
-  __atomic/aliases.h
-  __atomic/atomic.h
-  __atomic/atomic_base.h
-  __atomic/atomic_flag.h
-  __atomic/atomic_init.h
-  __atomic/atomic_lock_free.h
-  __atomic/atomic_ref.h
-  __atomic/atomic_sync.h
-  __atomic/check_memory_order.h
-  __atomic/contention_t.h
-  __atomic/cxx_atomic_impl.h
-  __atomic/fence.h
-  __atomic/is_always_lock_free.h
-  __atomic/kill_dependency.h
-  __atomic/memory_order.h
-  __atomic/to_gcc_order.h
-  __bit/bit_cast.h
-  __bit/bit_ceil.h
-  __bit/bit_floor.h
-  __bit/bit_log2.h
-  __bit/bit_width.h
-  __bit/blsr.h
-  __bit/byteswap.h
-  __bit/countl.h
-  __bit/countr.h
-  __bit/endian.h
-  __bit/has_single_bit.h
-  __bit/invert_if.h
-  __bit/popcount.h
-  __bit/rotate.h
-  __bit_reference
-  __charconv/chars_format.h
-  __charconv/from_chars_integral.h
-  __charconv/from_chars_result.h
-  __charconv/tables.h
-  __charconv/to_chars.h
-  __charconv/to_chars_base_10.h
-  __charconv/to_chars_floating_point.h
-  __charconv/to_chars_integral.h
-  __charconv/to_chars_result.h
-  __charconv/traits.h
-  __chrono/calendar.h
-  __chrono/concepts.h
-  __chrono/convert_to_timespec.h
-  __chrono/convert_to_tm.h
-  __chrono/day.h
-  __chrono/duration.h
-  __chrono/exception.h
-  __chrono/file_clock.h
-  __chrono/formatter.h
-  __chrono/hh_mm_ss.h
-  __chrono/high_resolution_clock.h
-  __chrono/leap_second.h
-  __chrono/literals.h
-  __chrono/local_info.h
-  __chrono/month.h
-  __chrono/month_weekday.h
-  __chrono/monthday.h
-  __chrono/ostream.h
-  __chrono/parser_std_format_spec.h
-  __chrono/statically_widen.h
-  __chrono/steady_clock.h
-  __chrono/sys_info.h
-  __chrono/system_clock.h
-  __chrono/time_point.h
-  __chrono/time_zone.h
-  __chrono/time_zone_link.h
-  __chrono/tzdb.h
-  __chrono/tzdb_list.h
-  __chrono/weekday.h
-  __chrono/year.h
-  __chrono/year_month.h
-  __chrono/year_month_day.h
-  __chrono/year_month_weekday.h
-  __chrono/zoned_time.h
-  __compare/common_comparison_category.h
-  __compare/compare_partial_order_fallback.h
-  __compare/compare_strong_order_fallback.h
-  __compare/compare_three_way.h
-  __compare/compare_three_way_result.h
-  __compare/compare_weak_order_fallback.h
-  __compare/is_eq.h
-  __compare/ordering.h
-  __compare/partial_order.h
-  __compare/strong_order.h
-  __compare/synth_three_way.h
-  __compare/three_way_comparable.h
-  __compare/weak_order.h
-  __concepts/arithmetic.h
-  __concepts/assignable.h
-  __concepts/boolean_testable.h
-  __concepts/class_or_enum.h
-  __concepts/common_reference_with.h
-  __concepts/common_with.h
-  __concepts/constructible.h
-  __concepts/convertible_to.h
-  __concepts/copyable.h
-  __concepts/derived_from.h
-  __concepts/destructible.h
-  __concepts/different_from.h
-  __concepts/equality_comparable.h
-  __concepts/invocable.h
-  __concepts/movable.h
-  __concepts/predicate.h
-  __concepts/regular.h
-  __concepts/relation.h
-  __concepts/same_as.h
-  __concepts/semiregular.h
-  __concepts/swappable.h
-  __concepts/totally_ordered.h
-  __condition_variable/condition_variable.h
-  __config
-  __configuration/abi.h
-  __configuration/availability.h
-  __configuration/compiler.h
-  __configuration/language.h
-  __configuration/platform.h
-  __coroutine/coroutine_handle.h
-  __coroutine/coroutine_traits.h
-  __coroutine/noop_coroutine_handle.h
-  __coroutine/trivial_awaitables.h
-  __debug_utils/randomize_range.h
-  __debug_utils/sanitizers.h
-  __debug_utils/strict_weak_ordering_check.h
-  __exception/exception.h
-  __exception/exception_ptr.h
-  __exception/nested_exception.h
-  __exception/operations.h
-  __exception/terminate.h
-  __expected/bad_expected_access.h
-  __expected/expected.h
-  __expected/unexpect.h
-  __expected/unexpected.h
-  __filesystem/copy_options.h
-  __filesystem/directory_entry.h
-  __filesystem/directory_iterator.h
-  __filesystem/directory_options.h
-  __filesystem/file_status.h
-  __filesystem/file_time_type.h
-  __filesystem/file_type.h
-  __filesystem/filesystem_error.h
-  __filesystem/operations.h
-  __filesystem/path.h
-  __filesystem/path_iterator.h
-  __filesystem/perm_options.h
-  __filesystem/perms.h
-  __filesystem/recursive_directory_iterator.h
-  __filesystem/space_info.h
-  __filesystem/u8path.h
-  __format/buffer.h
-  __format/concepts.h
-  __format/container_adaptor.h
-  __format/enable_insertable.h
-  __format/escaped_output_table.h
-  __format/extended_grapheme_cluster_table.h
-  __format/format_arg.h
-  __format/format_arg_store.h
-  __format/format_args.h
-  __format/format_context.h
-  __format/format_error.h
-  __format/format_functions.h
-  __format/format_parse_context.h
-  __format/format_string.h
-  __format/format_to_n_result.h
-  __format/formatter.h
-  __format/formatter_bool.h
-  __format/formatter_char.h
-  __format/formatter_floating_point.h
-  __format/formatter_integer.h
-  __format/formatter_integral.h
-  __format/formatter_output.h
-  __format/formatter_pointer.h
-  __format/formatter_string.h
-  __format/formatter_tuple.h
-  __format/indic_conjunct_break_table.h
-  __format/parser_std_format_spec.h
-  __format/range_default_formatter.h
-  __format/range_formatter.h
-  __format/unicode.h
-  __format/width_estimation_table.h
-  __format/write_escaped.h
-  __functional/binary_function.h
-  __functional/binary_negate.h
-  __functional/bind.h
-  __functional/bind_back.h
-  __functional/bind_front.h
-  __functional/binder1st.h
-  __functional/binder2nd.h
-  __functional/boyer_moore_searcher.h
-  __functional/compose.h
-  __functional/default_searcher.h
-  __functional/function.h
-  __functional/hash.h
-  __functional/identity.h
-  __functional/invoke.h
-  __functional/is_transparent.h
-  __functional/mem_fn.h
-  __functional/mem_fun_ref.h
-  __functional/not_fn.h
-  __functional/operations.h
-  __functional/perfect_forward.h
-  __functional/pointer_to_binary_function.h
-  __functional/pointer_to_unary_function.h
-  __functional/ranges_operations.h
-  __functional/reference_wrapper.h
-  __functional/unary_function.h
-  __functional/unary_negate.h
-  __functional/weak_result_type.h
-  __fwd/array.h
-  __fwd/bit_reference.h
-  __fwd/complex.h
-  __fwd/deque.h
-  __fwd/format.h
-  __fwd/fstream.h
-  __fwd/functional.h
-  __fwd/ios.h
-  __fwd/istream.h
-  __fwd/mdspan.h
-  __fwd/memory.h
-  __fwd/memory_resource.h
-  __fwd/ostream.h
-  __fwd/pair.h
-  __fwd/queue.h
-  __fwd/span.h
-  __fwd/sstream.h
-  __fwd/stack.h
-  __fwd/streambuf.h
-  __fwd/string.h
-  __fwd/string_view.h
-  __fwd/subrange.h
-  __fwd/tuple.h
-  __fwd/vector.h
-  __hash_table
-  __ios/fpos.h
-  __iterator/access.h
-  __iterator/advance.h
-  __iterator/aliasing_iterator.h
-  __iterator/back_insert_iterator.h
-  __iterator/bounded_iter.h
-  __iterator/common_iterator.h
-  __iterator/concepts.h
-  __iterator/counted_iterator.h
-  __iterator/cpp17_iterator_concepts.h
-  __iterator/data.h
-  __iterator/default_sentinel.h
-  __iterator/distance.h
-  __iterator/empty.h
-  __iterator/erase_if_container.h
-  __iterator/front_insert_iterator.h
-  __iterator/incrementable_traits.h
-  __iterator/indirectly_comparable.h
-  __iterator/insert_iterator.h
-  __iterator/istream_iterator.h
-  __iterator/istreambuf_iterator.h
-  __iterator/iter_move.h
-  __iterator/iter_swap.h
-  __iterator/iterator.h
-  __iterator/iterator_traits.h
-  __iterator/iterator_with_data.h
-  __iterator/mergeable.h
-  __iterator/move_iterator.h
-  __iterator/move_sentinel.h
-  __iterator/next.h
-  __iterator/ostream_iterator.h
-  __iterator/ostreambuf_iterator.h
-  __iterator/permutable.h
-  __iterator/prev.h
-  __iterator/projected.h
-  __iterator/ranges_iterator_traits.h
-  __iterator/readable_traits.h
-  __iterator/reverse_access.h
-  __iterator/reverse_iterator.h
-  __iterator/segmented_iterator.h
-  __iterator/size.h
-  __iterator/sortable.h
-  __iterator/unreachable_sentinel.h
-  __iterator/wrap_iter.h
-  __locale
-  __locale_dir/locale_base_api.h
-  __locale_dir/locale_base_api/android.h
-  __locale_dir/locale_base_api/bsd_locale_defaults.h
-  __locale_dir/locale_base_api/bsd_locale_fallbacks.h
-  __locale_dir/locale_base_api/fuchsia.h
-  __locale_dir/locale_base_api/ibm.h
-  __locale_dir/locale_base_api/locale_guard.h
-  __locale_dir/locale_base_api/musl.h
-  __locale_dir/locale_base_api/newlib.h
-  __locale_dir/locale_base_api/openbsd.h
-  __locale_dir/locale_base_api/win32.h
-  __math/abs.h
-  __math/copysign.h
-  __math/error_functions.h
-  __math/exponential_functions.h
-  __math/fdim.h
-  __math/fma.h
-  __math/gamma.h
-  __math/hyperbolic_functions.h
-  __math/hypot.h
-  __math/inverse_hyperbolic_functions.h
-  __math/inverse_trigonometric_functions.h
-  __math/logarithms.h
-  __math/min_max.h
-  __math/modulo.h
-  __math/remainder.h
-  __math/roots.h
-  __math/rounding_functions.h
-  __math/special_functions.h
-  __math/traits.h
-  __math/trigonometric_functions.h
-  __mbstate_t.h
-  __mdspan/default_accessor.h
-  __mdspan/extents.h
-  __mdspan/layout_left.h
-  __mdspan/layout_right.h
-  __mdspan/layout_stride.h
-  __mdspan/mdspan.h
-  __memory/addressof.h
-  __memory/align.h
-  __memory/aligned_alloc.h
-  __memory/allocate_at_least.h
-  __memory/allocation_guard.h
-  __memory/allocator.h
-  __memory/allocator_arg_t.h
-  __memory/allocator_destructor.h
-  __memory/allocator_traits.h
-  __memory/assume_aligned.h
-  __memory/auto_ptr.h
-  __memory/builtin_new_allocator.h
-  __memory/compressed_pair.h
-  __memory/concepts.h
-  __memory/construct_at.h
-  __memory/destruct_n.h
-  __memory/inout_ptr.h
-  __memory/out_ptr.h
-  __memory/pointer_traits.h
-  __memory/ranges_construct_at.h
-  __memory/ranges_uninitialized_algorithms.h
-  __memory/raw_storage_iterator.h
-  __memory/shared_ptr.h
-  __memory/swap_allocator.h
-  __memory/temp_value.h
-  __memory/temporary_buffer.h
-  __memory/uninitialized_algorithms.h
-  __memory/unique_ptr.h
-  __memory/uses_allocator.h
-  __memory/uses_allocator_construction.h
-  __memory/voidify.h
-  __memory_resource/memory_resource.h
-  __memory_resource/monotonic_buffer_resource.h
-  __memory_resource/polymorphic_allocator.h
-  __memory_resource/pool_options.h
-  __memory_resource/synchronized_pool_resource.h
-  __memory_resource/unsynchronized_pool_resource.h
-  __mutex/lock_guard.h
-  __mutex/mutex.h
-  __mutex/once_flag.h
-  __mutex/tag_types.h
-  __mutex/unique_lock.h
-  __node_handle
-  __numeric/accumulate.h
-  __numeric/adjacent_difference.h
-  __numeric/exclusive_scan.h
-  __numeric/gcd_lcm.h
-  __numeric/inclusive_scan.h
-  __numeric/inner_product.h
-  __numeric/iota.h
-  __numeric/midpoint.h
-  __numeric/partial_sum.h
-  __numeric/pstl.h
-  __numeric/reduce.h
-  __numeric/saturation_arithmetic.h
-  __numeric/transform_exclusive_scan.h
-  __numeric/transform_inclusive_scan.h
-  __numeric/transform_reduce.h
-  __ostream/basic_ostream.h
-  __ostream/print.h
-  __pstl/backend.h
-  __pstl/backend_fwd.h
-  __pstl/backends/default.h
-  __pstl/backends/libdispatch.h
-  __pstl/backends/serial.h
-  __pstl/backends/std_thread.h
-  __pstl/cpu_algos/any_of.h
-  __pstl/cpu_algos/cpu_traits.h
-  __pstl/cpu_algos/fill.h
-  __pstl/cpu_algos/find_if.h
-  __pstl/cpu_algos/for_each.h
-  __pstl/cpu_algos/merge.h
-  __pstl/cpu_algos/stable_sort.h
-  __pstl/cpu_algos/transform.h
-  __pstl/cpu_algos/transform_reduce.h
-  __pstl/dispatch.h
-  __pstl/handle_exception.h
-  __random/bernoulli_distribution.h
-  __random/binomial_distribution.h
-  __random/cauchy_distribution.h
-  __random/chi_squared_distribution.h
-  __random/clamp_to_integral.h
-  __random/default_random_engine.h
-  __random/discard_block_engine.h
-  __random/discrete_distribution.h
-  __random/exponential_distribution.h
-  __random/extreme_value_distribution.h
-  __random/fisher_f_distribution.h
-  __random/gamma_distribution.h
-  __random/generate_canonical.h
-  __random/geometric_distribution.h
-  __random/independent_bits_engine.h
-  __random/is_seed_sequence.h
-  __random/is_valid.h
-  __random/knuth_b.h
-  __random/linear_congruential_engine.h
-  __random/log2.h
-  __random/lognormal_distribution.h
-  __random/mersenne_twister_engine.h
-  __random/negative_binomial_distribution.h
-  __random/normal_distribution.h
-  __random/piecewise_constant_distribution.h
-  __random/piecewise_linear_distribution.h
-  __random/poisson_distribution.h
-  __random/random_device.h
-  __random/ranlux.h
-  __random/seed_seq.h
-  __random/shuffle_order_engine.h
-  __random/student_t_distribution.h
-  __random/subtract_with_carry_engine.h
-  __random/uniform_int_distribution.h
-  __random/uniform_random_bit_generator.h
-  __random/uniform_real_distribution.h
-  __random/weibull_distribution.h
-  __ranges/access.h
-  __ranges/all.h
-  __ranges/as_rvalue_view.h
-  __ranges/chunk_by_view.h
-  __ranges/common_view.h
-  __ranges/concepts.h
-  __ranges/container_compatible_range.h
-  __ranges/counted.h
-  __ranges/dangling.h
-  __ranges/data.h
-  __ranges/drop_view.h
-  __ranges/drop_while_view.h
-  __ranges/elements_view.h
-  __ranges/empty.h
-  __ranges/empty_view.h
-  __ranges/enable_borrowed_range.h
-  __ranges/enable_view.h
-  __ranges/filter_view.h
-  __ranges/from_range.h
-  __ranges/iota_view.h
-  __ranges/istream_view.h
-  __ranges/join_view.h
-  __ranges/lazy_split_view.h
-  __ranges/movable_box.h
-  __ranges/non_propagating_cache.h
-  __ranges/owning_view.h
-  __ranges/range_adaptor.h
-  __ranges/rbegin.h
-  __ranges/ref_view.h
-  __ranges/rend.h
-  __ranges/repeat_view.h
-  __ranges/reverse_view.h
-  __ranges/single_view.h
-  __ranges/size.h
-  __ranges/split_view.h
-  __ranges/subrange.h
-  __ranges/take_view.h
-  __ranges/take_while_view.h
-  __ranges/to.h
-  __ranges/transform_view.h
-  __ranges/view_interface.h
-  __ranges/views.h
-  __ranges/zip_view.h
-  __split_buffer
-  __std_clang_module
-  __std_mbstate_t.h
-  __stop_token/atomic_unique_lock.h
-  __stop_token/intrusive_list_view.h
-  __stop_token/intrusive_shared_ptr.h
-  __stop_token/stop_callback.h
-  __stop_token/stop_source.h
-  __stop_token/stop_state.h
-  __stop_token/stop_token.h
-  __string/char_traits.h
-  __string/constexpr_c_functions.h
-  __string/extern_template_lists.h
-  __support/ibm/gettod_zos.h
-  __support/ibm/locale_mgmt_zos.h
-  __support/ibm/nanosleep.h
-  __support/xlocale/__nop_locale_mgmt.h
-  __support/xlocale/__posix_l_fallback.h
-  __support/xlocale/__strtonum_fallback.h
-  __system_error/errc.h
-  __system_error/error_category.h
-  __system_error/error_code.h
-  __system_error/error_condition.h
-  __system_error/system_error.h
-  __thread/formatter.h
-  __thread/id.h
-  __thread/jthread.h
-  __thread/poll_with_backoff.h
-  __thread/support.h
-  __thread/support/c11.h
-  __thread/support/external.h
-  __thread/support/pthread.h
-  __thread/support/windows.h
-  __thread/this_thread.h
-  __thread/thread.h
-  __thread/timed_backoff_policy.h
-  __tree
-  __tuple/find_index.h
-  __tuple/ignore.h
-  __tuple/make_tuple_types.h
-  __tuple/sfinae_helpers.h
-  __tuple/tuple_element.h
-  __tuple/tuple_indices.h
-  __tuple/tuple_like.h
-  __tuple/tuple_like_ext.h
-  __tuple/tuple_like_no_subrange.h
-  __tuple/tuple_size.h
-  __tuple/tuple_types.h
-  __type_traits/add_const.h
-  __type_traits/add_cv.h
-  __type_traits/add_lvalue_reference.h
-  __type_traits/add_pointer.h
-  __type_traits/add_rvalue_reference.h
-  __type_traits/add_volatile.h
-  __type_traits/aligned_storage.h
-  __type_traits/aligned_union.h
-  __type_traits/alignment_of.h
-  __type_traits/can_extract_key.h
-  __type_traits/common_reference.h
-  __type_traits/common_type.h
-  __type_traits/conditional.h
-  __type_traits/conjunction.h
-  __type_traits/copy_cv.h
-  __type_traits/copy_cvref.h
-  __type_traits/datasizeof.h
-  __type_traits/decay.h
-  __type_traits/dependent_type.h
-  __type_traits/desugars_to.h
-  __type_traits/disjunction.h
-  __type_traits/enable_if.h
-  __type_traits/extent.h
-  __type_traits/has_unique_object_representation.h
-  __type_traits/has_virtual_destructor.h
-  __type_traits/integral_constant.h
-  __type_traits/invoke.h
-  __type_traits/is_abstract.h
-  __type_traits/is_aggregate.h
-  __type_traits/is_allocator.h
-  __type_traits/is_always_bitcastable.h
-  __type_traits/is_arithmetic.h
-  __type_traits/is_array.h
-  __type_traits/is_assignable.h
-  __type_traits/is_base_of.h
-  __type_traits/is_bounded_array.h
-  __type_traits/is_callable.h
-  __type_traits/is_char_like_type.h
-  __type_traits/is_class.h
-  __type_traits/is_compound.h
-  __type_traits/is_const.h
-  __type_traits/is_constant_evaluated.h
-  __type_traits/is_constructible.h
-  __type_traits/is_convertible.h
-  __type_traits/is_core_convertible.h
-  __type_traits/is_destructible.h
-  __type_traits/is_empty.h
-  __type_traits/is_enum.h
-  __type_traits/is_equality_comparable.h
-  __type_traits/is_execution_policy.h
-  __type_traits/is_final.h
-  __type_traits/is_floating_point.h
-  __type_traits/is_function.h
-  __type_traits/is_fundamental.h
-  __type_traits/is_implicitly_default_constructible.h
-  __type_traits/is_integral.h
-  __type_traits/is_literal_type.h
-  __type_traits/is_member_pointer.h
-  __type_traits/is_nothrow_assignable.h
-  __type_traits/is_nothrow_constructible.h
-  __type_traits/is_nothrow_convertible.h
-  __type_traits/is_nothrow_destructible.h
-  __type_traits/is_null_pointer.h
-  __type_traits/is_object.h
-  __type_traits/is_pod.h
-  __type_traits/is_pointer.h
-  __type_traits/is_polymorphic.h
-  __type_traits/is_primary_template.h
-  __type_traits/is_reference.h
-  __type_traits/is_reference_wrapper.h
-  __type_traits/is_referenceable.h
-  __type_traits/is_same.h
-  __type_traits/is_scalar.h
-  __type_traits/is_signed.h
-  __type_traits/is_signed_integer.h
-  __type_traits/is_specialization.h
-  __type_traits/is_standard_layout.h
-  __type_traits/is_swappable.h
-  __type_traits/is_trivial.h
-  __type_traits/is_trivially_assignable.h
-  __type_traits/is_trivially_constructible.h
-  __type_traits/is_trivially_copyable.h
-  __type_traits/is_trivially_destructible.h
-  __type_traits/is_trivially_lexicographically_comparable.h
-  __type_traits/is_trivially_relocatable.h
-  __type_traits/is_unbounded_array.h
-  __type_traits/is_union.h
-  __type_traits/is_unsigned.h
-  __type_traits/is_unsigned_integer.h
-  __type_traits/is_valid_expansion.h
-  __type_traits/is_void.h
-  __type_traits/is_volatile.h
-  __type_traits/lazy.h
-  __type_traits/make_32_64_or_128_bit.h
-  __type_traits/make_const_lvalue_ref.h
-  __type_traits/make_signed.h
-  __type_traits/make_unsigned.h
-  __type_traits/maybe_const.h
-  __type_traits/nat.h
-  __type_traits/negation.h
-  __type_traits/noexcept_move_assign_container.h
-  __type_traits/promote.h
-  __type_traits/rank.h
-  __type_traits/remove_all_extents.h
-  __type_traits/remove_const.h
-  __type_traits/remove_const_ref.h
-  __type_traits/remove_cv.h
-  __type_traits/remove_cvref.h
-  __type_traits/remove_extent.h
-  __type_traits/remove_pointer.h
-  __type_traits/remove_reference.h
-  __type_traits/remove_volatile.h
-  __type_traits/result_of.h
-  __type_traits/strip_signature.h
-  __type_traits/type_identity.h
-  __type_traits/type_list.h
-  __type_traits/underlying_type.h
-  __type_traits/unwrap_ref.h
-  __type_traits/void_t.h
-  __undef_macros
-  __utility/as_const.h
-  __utility/as_lvalue.h
-  __utility/auto_cast.h
-  __utility/cmp.h
-  __utility/convert_to_integral.h
-  __utility/declval.h
-  __utility/empty.h
-  __utility/exception_guard.h
-  __utility/exchange.h
-  __utility/forward.h
-  __utility/forward_like.h
-  __utility/in_place.h
-  __utility/integer_sequence.h
-  __utility/is_pointer_in_range.h
-  __utility/is_valid_range.h
-  __utility/move.h
-  __utility/no_destroy.h
-  __utility/pair.h
-  __utility/piecewise_construct.h
-  __utility/priority_tag.h
-  __utility/private_constructor_tag.h
-  __utility/rel_ops.h
-  __utility/small_buffer.h
-  __utility/swap.h
-  __utility/to_underlying.h
-  __utility/unreachable.h
-  __variant/monostate.h
-  __verbose_abort
-  algorithm
-  any
-  array
-  atomic
-  barrier
-  bit
-  bitset
-  cassert
-  ccomplex
-  cctype
-  cerrno
-  cfenv
-  cfloat
-  charconv
-  chrono
-  cinttypes
-  ciso646
-  climits
-  clocale
-  cmath
-  codecvt
-  compare
-  complex
-  complex.h
-  concepts
-  condition_variable
-  coroutine
-  csetjmp
-  csignal
-  cstdarg
-  cstdbool
-  cstddef
-  cstdint
-  cstdio
-  cstdlib
-  cstring
-  ctgmath
-  ctime
-  ctype.h
-  cuchar
-  cwchar
-  cwctype
-  deque
-  errno.h
-  exception
-  execution
-  expected
-  experimental/__config
-  experimental/__simd/aligned_tag.h
-  experimental/__simd/declaration.h
-  experimental/__simd/reference.h
-  experimental/__simd/scalar.h
-  experimental/__simd/simd.h
-  experimental/__simd/simd_mask.h
-  experimental/__simd/traits.h
-  experimental/__simd/utility.h
-  experimental/__simd/vec_ext.h
-  experimental/iterator
-  experimental/memory
-  experimental/propagate_const
-  experimental/simd
-  experimental/type_traits
-  experimental/utility
-  ext/__hash
-  ext/hash_map
-  ext/hash_set
-  fenv.h
-  filesystem
-  float.h
-  format
-  forward_list
-  fstream
-  functional
-  future
-  initializer_list
-  inttypes.h
-  iomanip
-  ios
-  iosfwd
-  iostream
-  istream
-  iterator
-  latch
-  limits
-  list
-  locale
-  locale.h
-  map
-  math.h
-  mdspan
-  memory
-  memory_resource
-  module.modulemap
-  mutex
-  new
-  numbers
-  numeric
-  optional
-  ostream
-  print
-  queue
-  random
-  ranges
-  ratio
-  regex
-  scoped_allocator
-  semaphore
-  set
-  shared_mutex
-  source_location
-  span
-  sstream
-  stack
-  stdatomic.h
-  stdbool.h
-  stddef.h
-  stdexcept
-  stdint.h
-  stdio.h
-  stdlib.h
-  stop_token
-  streambuf
-  string
-  string.h
-  string_view
-  strstream
-  syncstream
-  system_error
-  tgmath.h
-  thread
-  tuple
-  type_traits
-  typeindex
-  typeinfo
-  uchar.h
-  unordered_map
-  unordered_set
-  utility
-  valarray
-  variant
-  vector
-  version
-  wchar.h
-  wctype.h
-  )
-
-configure_file("__config_site.in" "${LIBCXX_GENERATED_INCLUDE_TARGET_DIR}/__config_site" @ONLY)
-configure_file("${LIBCXX_ASSERTION_HANDLER_FILE}" "${LIBCXX_GENERATED_INCLUDE_DIR}/__assertion_handler" COPYONLY)
-
-set(_all_includes "${LIBCXX_GENERATED_INCLUDE_TARGET_DIR}/__config_site"
-                  "${LIBCXX_GENERATED_INCLUDE_DIR}/__assertion_handler")
-foreach(f ${files})
-  set(src "${CMAKE_CURRENT_SOURCE_DIR}/${f}")
-  set(dst "${LIBCXX_GENERATED_INCLUDE_DIR}/${f}")
-  add_custom_command(OUTPUT ${dst}
-    DEPENDS ${src}
-    COMMAND ${CMAKE_COMMAND} -E copy_if_different ${src} ${dst}
-    COMMENT "Copying CXX header ${f}")
-  list(APPEND _all_includes "${dst}")
-endforeach()
-
-# Generate the IWYU mapping. This depends on all header files but it's also considered as an
-# "include" for dependency tracking.
-add_custom_command(OUTPUT "${LIBCXX_GENERATED_INCLUDE_DIR}/libcxx.imp"
-  COMMAND "${Python3_EXECUTABLE}" "${LIBCXX_SOURCE_DIR}/utils/generate_iwyu_mapping.py" "-o" "${LIBCXX_GENERATED_INCLUDE_DIR}/libcxx.imp"
-  DEPENDS "${LIBCXX_SOURCE_DIR}/utils/libcxx/header_information.py"
-  COMMENT "Generate the mapping file for include-what-you-use"
-)
-list(APPEND _all_includes "${LIBCXX_GENERATED_INCLUDE_DIR}/libcxx.imp")
-
-add_custom_target(generate-cxx-headers ALL DEPENDS ${_all_includes})
-
-add_library(cxx-headers INTERFACE)
-target_link_libraries(cxx-headers INTERFACE libcxx-libc-headers libcxx-abi-headers)
-add_dependencies(cxx-headers generate-cxx-headers)
-# It's important that the arch directory be included first so that its header files
-# which interpose on the default include dir be included instead of the default ones.
-target_include_directories(cxx-headers INTERFACE ${LIBCXX_GENERATED_INCLUDE_TARGET_DIR}
-                                                 ${LIBCXX_GENERATED_INCLUDE_DIR})
-
-if (LIBCXX_INSTALL_HEADERS)
-  foreach(file ${files})
-    get_filename_component(dir ${file} DIRECTORY)
-    install(FILES ${file}
-      DESTINATION "${LIBCXX_INSTALL_INCLUDE_DIR}/${dir}"
-      COMPONENT cxx-headers
-      PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ
-    )
-  endforeach()
-
-  # Install the generated __config_site file to the per-target include dir.
-  install(FILES "${LIBCXX_GENERATED_INCLUDE_TARGET_DIR}/__config_site"
-    DESTINATION "${LIBCXX_INSTALL_INCLUDE_TARGET_DIR}"
-    PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ
-    COMPONENT cxx-headers)
-
-  # Install the generated __assertion_handler file to the generic include dir.
-  install(FILES "${LIBCXX_GENERATED_INCLUDE_DIR}/__assertion_handler"
-    DESTINATION "${LIBCXX_INSTALL_INCLUDE_DIR}"
-    PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ
-    COMPONENT cxx-headers)
-
-  # Install the generated IWYU file to the generic include dir.
-  install(FILES "${LIBCXX_GENERATED_INCLUDE_DIR}/libcxx.imp"
-    DESTINATION "${LIBCXX_INSTALL_INCLUDE_DIR}"
-    PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ
-    COMPONENT cxx-headers)
-
-  if (NOT CMAKE_CONFIGURATION_TYPES)
-    add_custom_target(install-cxx-headers
-                      DEPENDS cxx-headers
-                      COMMAND "${CMAKE_COMMAND}"
-                              -DCMAKE_INSTALL_COMPONENT=cxx-headers
-                              -P "${CMAKE_BINARY_DIR}/cmake_install.cmake")
-    # Stripping is a no-op for headers
-    add_custom_target(install-cxx-headers-stripped DEPENDS install-cxx-headers)
-  endif()
-endif()
diff --git a/include/__cxx03/__config b/include/__cxx03/__config
index 935fa4c..3e8f181 100644
--- a/include/__cxx03/__config
+++ b/include/__cxx03/__config
@@ -10,10 +10,10 @@
 #ifndef _LIBCPP___CXX03___CONFIG
 #define _LIBCPP___CXX03___CONFIG
 
-#include <__config_site>
 #include <__cxx03/__configuration/abi.h>
 #include <__cxx03/__configuration/availability.h>
 #include <__cxx03/__configuration/compiler.h>
+#include <__cxx03/__configuration/config_site_shim.h>
 #include <__cxx03/__configuration/platform.h>
 
 #ifndef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER
diff --git a/include/__cxx03/__configuration/abi.h b/include/__cxx03/__configuration/abi.h
index 9e7f731..740aec3 100644
--- a/include/__cxx03/__configuration/abi.h
+++ b/include/__cxx03/__configuration/abi.h
@@ -10,8 +10,8 @@
 #ifndef _LIBCPP___CXX03___CONFIGURATION_ABI_H
 #define _LIBCPP___CXX03___CONFIGURATION_ABI_H
 
-#include <__config_site>
 #include <__cxx03/__configuration/compiler.h>
+#include <__cxx03/__configuration/config_site_shim.h>
 #include <__cxx03/__configuration/platform.h>
 
 #ifndef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER
diff --git a/include/__cxx03/__configuration/compiler.h b/include/__cxx03/__configuration/compiler.h
index 2f33fb1..4d53a21 100644
--- a/include/__cxx03/__configuration/compiler.h
+++ b/include/__cxx03/__configuration/compiler.h
@@ -10,7 +10,7 @@
 #ifndef _LIBCPP___CXX03___CONFIGURATION_COMPILER_H
 #define _LIBCPP___CXX03___CONFIGURATION_COMPILER_H
 
-#include <__config_site>
+#include <__cxx03/__configuration/config_site_shim.h>
 
 #ifndef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER
 #  pragma GCC system_header
diff --git a/include/__cxx03/__configuration/config_site_shim.h b/include/__cxx03/__configuration/config_site_shim.h
new file mode 100644
index 0000000..974a17a
--- /dev/null
+++ b/include/__cxx03/__configuration/config_site_shim.h
@@ -0,0 +1,80 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef _LIBCPP___CXX03___CONFIGURATION_CONFIG_SITE_SHIM_H
+#define _LIBCPP___CXX03___CONFIGURATION_CONFIG_SITE_SHIM_H
+
+#include <__config_site>
+
+#if !_LIBCPP_ABI_FORCE_ITANIUM
+#  undef _LIBCPP_ABI_FORCE_ITANIUM
+#endif
+
+#if !_LIBCPP_ABI_FORCE_MICROSOFT
+#  undef _LIBCPP_ABI_FORCE_MICROSOFT
+#endif
+
+#if !_LIBCPP_HAS_THREADS
+#  define _LIBCPP_HAS_NO_THREADS
+#endif
+
+#if !_LIBCPP_HAS_MONOTONIC_CLOCK
+#  define _LIBCPP_HAS_NO_MONOTONIC_CLOCK
+#endif
+
+#if !_LIBCPP_HAS_MUSL_LIBC
+#  undef _LIBCPP_HAS_MUSL_LIBC
+#endif
+
+#if !_LIBCPP_HAS_THREAD_API_PTHREAD
+#  undef _LIBCPP_HAS_THREAD_API_PTHREAD
+#endif
+
+#if !_LIBCPP_HAS_THREAD_API_EXTERNAL
+#  undef _LIBCPP_HAS_THREAD_API_EXTERNAL
+#endif
+
+#if !_LIBCPP_HAS_THREAD_API_WIN32
+#  undef _LIBCPP_HAS_THREAD_API_WIN32
+#endif
+
+#undef _LIBCPP_HAS_THREAD_API_C11
+
+#if !_LIBCPP_HAS_VENDOR_AVAILABILITY_ANNOTATIONS
+#  define _LIBCPP_HAS_NO_VENDOR_AVAILABILITY_ANNOTATIONS
+#endif
+
+#if !_LIBCPP_HAS_FILESYSTEM
+#  define _LIBCPP_HAS_NO_FILESYSTEM
+#endif
+
+#if !_LIBCPP_HAS_RANDOM_DEVICE
+#  define _LIBCPP_HAS_NO_RANDOM_DEVICE
+#endif
+
+#if !_LIBCPP_HAS_LOCALIZATION
+#  define _LIBCPP_HAS_NO_LOCALIZATION
+#endif
+
+#if !_LIBCPP_HAS_UNICODE
+#  define _LIBCPP_HAS_NO_UNICODE
+#endif
+
+#if !_LIBCPP_HAS_WIDE_CHARACTERS
+#  define _LIBCPP_HAS_NO_WIDE_CHARACTERS
+#endif
+
+#if !_LIBCPP_HAS_TIME_ZONE_DATABASE
+#  define _LIBCPP_HAS_NO_TIME_ZONE_DATABASE
+#endif
+
+#if !_LIBCPP_INSTRUMENTED_WITH_ASAN
+#  undef _LIBCPP_INSTRUMENTED_WITH_ASAN
+#endif
+
+#endif // _LIBCPP___CXX03___CONFIGURATION_CONFIG_SITE_SHIM_H
diff --git a/include/__cxx03/__configuration/language.h b/include/__cxx03/__configuration/language.h
index 604f2d2..8fd09f4 100644
--- a/include/__cxx03/__configuration/language.h
+++ b/include/__cxx03/__configuration/language.h
@@ -10,7 +10,7 @@
 #ifndef _LIBCPP___CXX03___CONFIGURATION_LANGUAGE_H
 #define _LIBCPP___CXX03___CONFIGURATION_LANGUAGE_H
 
-#include <__config_site>
+#include <__cxx03/__configuration/config_site_shim.h>
 
 #ifndef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER
 #  pragma GCC system_header
diff --git a/include/__cxx03/__configuration/platform.h b/include/__cxx03/__configuration/platform.h
index b471898..2459050 100644
--- a/include/__cxx03/__configuration/platform.h
+++ b/include/__cxx03/__configuration/platform.h
@@ -10,7 +10,7 @@
 #ifndef _LIBCPP___CXX03___CONFIGURATION_PLATFORM_H
 #define _LIBCPP___CXX03___CONFIGURATION_PLATFORM_H
 
-#include <__config_site>
+#include <__cxx03/__configuration/config_site_shim.h>
 
 #ifndef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER
 #  pragma GCC system_header
diff --git a/include/__cxx03/__locale_dir/locale_base_api/bsd_locale_fallbacks.h b/include/__cxx03/__locale_dir/locale_base_api/bsd_locale_fallbacks.h
index e61e950..a73b724 100644
--- a/include/__cxx03/__locale_dir/locale_base_api/bsd_locale_fallbacks.h
+++ b/include/__cxx03/__locale_dir/locale_base_api/bsd_locale_fallbacks.h
@@ -15,8 +15,8 @@
 
 #include <__cxx03/__locale_dir/locale_base_api/locale_guard.h>
 #include <__cxx03/cstdio>
-#include <__cxx03/stdarg.h>
 #include <__cxx03/stdlib.h>
+#include <stdarg.h>
 
 #ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
 #  include <__cxx03/cwchar>
diff --git a/include/__cxx03/__thread/support/pthread.h b/include/__cxx03/__thread/support/pthread.h
index a4d7c87..4dc7a49 100644
--- a/include/__cxx03/__thread/support/pthread.h
+++ b/include/__cxx03/__thread/support/pthread.h
@@ -15,8 +15,8 @@
 #include <__cxx03/__config>
 #include <__cxx03/ctime>
 #include <__cxx03/errno.h>
-#include <__cxx03/pthread.h>
-#include <__cxx03/sched.h>
+#include <pthread.h>
+#include <sched.h>
 
 #ifdef __MVS__
 #  include <__cxx03/__support/ibm/nanosleep.h>
diff --git a/include/__cxx03/climits b/include/__cxx03/climits
index 37d8c41..2c6fe5a 100644
--- a/include/__cxx03/climits
+++ b/include/__cxx03/climits
@@ -39,7 +39,7 @@
 
 #include <__cxx03/__config>
 
-#include <__cxx03/limits.h>
+#include <limits.h>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
diff --git a/include/__cxx03/locale b/include/__cxx03/locale
index 78c0fd7..6360bbc 100644
--- a/include/__cxx03/locale
+++ b/include/__cxx03/locale
@@ -222,7 +222,7 @@
 // Most unix variants have catopen.  These are the specific ones that don't.
 #    if !defined(__BIONIC__) && !defined(_NEWLIB_VERSION) && !defined(__EMSCRIPTEN__)
 #      define _LIBCPP_HAS_CATOPEN 1
-#      include <__cxx03/nl_types.h>
+#      include <nl_types.h>
 #    endif
 #  endif
 
diff --git a/include/__cxx03/module.modulemap b/include/__cxx03/module.modulemap
index 13d0dce..34a2d0f 100644
--- a/include/__cxx03/module.modulemap
+++ b/include/__cxx03/module.modulemap
@@ -1,462 +1,462 @@
 // Main C++ standard library interfaces
-module std_algorithm [system] {
+module cxx03_std_algorithm [system] {
   header "algorithm"
   export *
 }
-module std_any [system] {
+module cxx03_std_any [system] {
   header "any"
   export *
 }
-module std_array [system] {
+module cxx03_std_array [system] {
   header "array"
   export *
 }
-module std_atomic [system] {
+module cxx03_std_atomic [system] {
   header "atomic"
   export *
 }
-module std_barrier [system] {
+module cxx03_std_barrier [system] {
   header "barrier"
   export *
 }
-module std_bit [system] {
+module cxx03_std_bit [system] {
   header "bit"
   export *
 }
-module std_bitset [system] {
+module cxx03_std_bitset [system] {
   header "bitset"
   export *
 }
-module std_charconv [system] {
+module cxx03_std_charconv [system] {
   header "charconv"
   export *
 }
-module std_chrono [system] {
+module cxx03_std_chrono [system] {
   header "chrono"
   export *
 }
-module std_codecvt [system] {
+module cxx03_std_codecvt [system] {
   header "codecvt"
   export *
 }
-module std_compare [system] {
+module cxx03_std_compare [system] {
   header "compare"
   export *
 }
-module std_complex [system] {
+module cxx03_std_complex [system] {
   header "complex"
   export *
 }
-module std_concepts [system] {
+module cxx03_std_concepts [system] {
   header "concepts"
   export *
 }
-module std_condition_variable [system] {
+module cxx03_std_condition_variable [system] {
   header "condition_variable"
   export *
 }
-module std_coroutine [system] {
+module cxx03_std_coroutine [system] {
   header "coroutine"
   export *
 }
-module std_deque [system] {
+module cxx03_std_deque [system] {
   header "deque"
   export *
 }
-module std_exception [system] {
+module cxx03_std_exception [system] {
   header "exception"
   export *
 }
-module std_execution [system] {
+module cxx03_std_execution [system] {
   header "execution"
   export *
 }
-module std_expected [system] {
+module cxx03_std_expected [system] {
   header "expected"
   export *
 }
-module std_filesystem [system] {
+module cxx03_std_filesystem [system] {
   header "filesystem"
   export *
 }
-module std_format [system] {
+module cxx03_std_format [system] {
   header "format"
   export *
 }
-module std_forward_list [system] {
+module cxx03_std_forward_list [system] {
   header "forward_list"
   export *
 }
-module std_fstream [system] {
+module cxx03_std_fstream [system] {
   header "fstream"
   export *
 }
-module std_functional [system] {
+module cxx03_std_functional [system] {
   header "functional"
   export *
 }
-module std_future [system] {
+module cxx03_std_future [system] {
   header "future"
   export *
 }
-module std_initializer_list [system] {
+module cxx03_std_initializer_list [system] {
   header "initializer_list"
   export *
 }
-module std_iomanip [system] {
+module cxx03_std_iomanip [system] {
   header "iomanip"
   export *
 }
-module std_ios [system] {
+module cxx03_std_ios [system] {
   header "ios"
   export *
 }
-module std_iosfwd [system] {
+module cxx03_std_iosfwd [system] {
   header "iosfwd"
   export *
 }
-module std_iostream [system] {
+module cxx03_std_iostream [system] {
   header "iostream"
   export *
 }
-module std_istream [system] {
+module cxx03_std_istream [system] {
   header "istream"
   export *
 }
-module std_iterator [system] {
+module cxx03_std_iterator [system] {
   header "iterator"
   export *
 }
-module std_latch [system] {
+module cxx03_std_latch [system] {
   header "latch"
   export *
 }
-module std_limits [system] {
+module cxx03_std_limits [system] {
   header "limits"
   export *
 }
-module std_list [system] {
+module cxx03_std_list [system] {
   header "list"
   export *
 }
-module std_locale [system] {
+module cxx03_std_locale [system] {
   header "locale"
   export *
 }
-module std_map [system] {
+module cxx03_std_map [system] {
   header "map"
   export *
 }
-module std_mdspan [system] {
+module cxx03_std_mdspan [system] {
   header "mdspan"
   export *
 }
-module std_memory [system] {
+module cxx03_std_memory [system] {
   header "memory"
   export *
 }
-module std_memory_resource [system] {
+module cxx03_std_memory_resource [system] {
   header "memory_resource"
   export *
 }
-module std_mutex [system] {
+module cxx03_std_mutex [system] {
   header "mutex"
   export *
 }
-module std_new [system] {
+module cxx03_std_new [system] {
   header "new"
   export *
 }
-module std_numbers [system] {
+module cxx03_std_numbers [system] {
   header "numbers"
   export *
 }
-module std_numeric [system] {
+module cxx03_std_numeric [system] {
   header "numeric"
   export *
 }
-module std_optional [system] {
+module cxx03_std_optional [system] {
   header "optional"
   export *
 }
-module std_ostream [system] {
+module cxx03_std_ostream [system] {
   header "ostream"
   export *
 }
-module std_print [system] {
+module cxx03_std_print [system] {
   header "print"
   export *
 }
-module std_queue [system] {
+module cxx03_std_queue [system] {
   header "queue"
   export *
 }
-module std_random [system] {
+module cxx03_std_random [system] {
   header "random"
   export *
 }
-module std_ranges [system] {
+module cxx03_std_ranges [system] {
   header "ranges"
   export *
 }
-module std_ratio [system] {
+module cxx03_std_ratio [system] {
   header "ratio"
   export *
 }
-module std_regex [system] {
+module cxx03_std_regex [system] {
   header "regex"
   export *
 }
-module std_scoped_allocator [system] {
+module cxx03_std_scoped_allocator [system] {
   header "scoped_allocator"
   export *
 }
-module std_semaphore [system] {
+module cxx03_std_semaphore [system] {
   header "semaphore"
   export *
 }
-module std_set [system] {
+module cxx03_std_set [system] {
   header "set"
   export *
 }
-module std_shared_mutex [system] {
+module cxx03_std_shared_mutex [system] {
   header "shared_mutex"
   export std_version
 }
-module std_source_location [system] {
+module cxx03_std_source_location [system] {
   header "source_location"
   export *
 }
-module std_span [system] {
+module cxx03_std_span [system] {
   header "span"
   export std_private_ranges_enable_borrowed_range
   export std_version
   export std_private_span_span_fwd
 }
-module std_sstream [system] {
+module cxx03_std_sstream [system] {
   header "sstream"
   export *
 }
-module std_stack [system] {
+module cxx03_std_stack [system] {
   header "stack"
   export *
 }
-module std_stdexcept [system] {
+module cxx03_std_stdexcept [system] {
   header "stdexcept"
   export *
 }
-module std_stop_token {
+module cxx03_std_stop_token {
   header "stop_token"
   export *
 }
-module std_streambuf [system] {
+module cxx03_std_streambuf [system] {
   header "streambuf"
   export *
 }
-module std_string [system] {
+module cxx03_std_string [system] {
   header "string"
   export *
 }
-module std_string_view [system] {
+module cxx03_std_string_view [system] {
   header "string_view"
   export *
 }
-module std_strstream [system] {
+module cxx03_std_strstream [system] {
   header "strstream"
   export *
 }
-module std_syncstream [system] {
+module cxx03_std_syncstream [system] {
   header "syncstream"
   export *
 }
-module std_system_error [system] {
+module cxx03_std_system_error [system] {
   header "system_error"
   export *
 }
-module std_thread [system] {
+module cxx03_std_thread [system] {
   header "thread"
   export *
 }
-module std_tuple [system] {
+module cxx03_std_tuple [system] {
   header "tuple"
   export *
 }
-module std_type_traits [system] {
+module cxx03_std_type_traits [system] {
   header "type_traits"
   export *
 }
-module std_typeindex [system] {
+module cxx03_std_typeindex [system] {
   header "typeindex"
   export *
 }
-module std_typeinfo [system] {
+module cxx03_std_typeinfo [system] {
   header "typeinfo"
   export *
 }
-module std_unordered_map [system] {
+module cxx03_std_unordered_map [system] {
   header "unordered_map"
   export *
 }
-module std_unordered_set [system] {
+module cxx03_std_unordered_set [system] {
   header "unordered_set"
   export *
 }
-module std_utility [system] {
+module cxx03_std_utility [system] {
   header "utility"
   export *
 }
-module std_valarray [system] {
+module cxx03_std_valarray [system] {
   header "valarray"
   export *
 }
-module std_variant [system] {
+module cxx03_std_variant [system] {
   header "variant"
   export *
 }
-module std_vector [system] {
+module cxx03_std_vector [system] {
   header "vector"
   export *
 }
-module std_version [system] {
+module cxx03_std_version [system] {
   header "version"
   export *
 }
 
 // C standard library interface wrappers
-module std_cassert [system] {
+module cxx03_std_cassert [system] {
   // <cassert>'s use of NDEBUG requires textual inclusion.
   textual header "cassert"
 }
-module std_ccomplex [system] {
+module cxx03_std_ccomplex [system] {
   header "ccomplex"
   export *
 }
-module std_cctype [system] {
+module cxx03_std_cctype [system] {
   header "cctype"
   export *
 }
-module std_cerrno [system] {
+module cxx03_std_cerrno [system] {
   header "cerrno"
   export *
 }
-module std_cfenv [system] {
+module cxx03_std_cfenv [system] {
   header "cfenv"
   export *
 }
-module std_cfloat [system] {
+module cxx03_std_cfloat [system] {
   header "cfloat"
   export *
 }
-module std_cinttypes [system] {
+module cxx03_std_cinttypes [system] {
   header "cinttypes"
   export *
 }
-module std_ciso646 [system] {
+module cxx03_std_ciso646 [system] {
   header "ciso646"
   export *
 }
-module std_climits [system] {
+module cxx03_std_climits [system] {
   header "climits"
   export *
 }
-module std_clocale [system] {
+module cxx03_std_clocale [system] {
   header "clocale"
   export *
 }
-module std_cmath [system] {
+module cxx03_std_cmath [system] {
   header "cmath"
   export *
 }
-module std_csetjmp [system] {
+module cxx03_std_csetjmp [system] {
   header "csetjmp"
   export *
 }
-module std_csignal [system] {
+module cxx03_std_csignal [system] {
   header "csignal"
   export *
 }
 // FIXME: <cstdalign> is missing.
-module std_cstdarg [system] {
+module cxx03_std_cstdarg [system] {
   header "cstdarg"
   export *
 }
-module std_cstdbool [system] {
+module cxx03_std_cstdbool [system] {
   header "cstdbool"
   export *
 }
-module std_cstddef [system] {
+module cxx03_std_cstddef [system] {
   header "cstddef"
   export *
 }
-module std_cstdint [system] {
+module cxx03_std_cstdint [system] {
   header "cstdint"
   export *
 }
-module std_cstdio [system] {
+module cxx03_std_cstdio [system] {
   header "cstdio"
   export *
 }
-module std_cstdlib [system] {
+module cxx03_std_cstdlib [system] {
   header "cstdlib"
   export *
 }
-module std_cstring [system] {
+module cxx03_std_cstring [system] {
   header "cstring"
   export *
 }
-module std_ctgmath [system] {
+module cxx03_std_ctgmath [system] {
   header "ctgmath"
   export *
 }
-module std_ctime [system] {
+module cxx03_std_ctime [system] {
   header "ctime"
   export *
 }
-module std_cuchar [system] {
+module cxx03_std_cuchar [system] {
   header "cuchar"
   export *
 }
-module std_cwchar [system] {
+module cxx03_std_cwchar [system] {
   header "cwchar"
   export *
 }
-module std_cwctype [system] {
+module cxx03_std_cwctype [system] {
   header "cwctype"
   export *
 }
 
 // C standard library interfaces augmented/replaced in C++
 // <assert.h> provided by C library.
-module std_complex_h [system] {
+module cxx03_std_complex_h [system] {
   header "complex.h"
   export *
 }
-module std_ctype_h [system] {
+module cxx03_std_ctype_h [system] {
   header "ctype.h"
   export *
 }
-module std_errno_h [system] {
+module cxx03_std_errno_h [system] {
   header "errno.h"
   export *
 }
-module std_fenv_h [system] {
+module cxx03_std_fenv_h [system] {
   header "fenv.h"
   export *
 }
-module std_float_h [system] {
+module cxx03_std_float_h [system] {
   header "float.h"
   export *
 }
-module std_inttypes_h [system] {
+module cxx03_std_inttypes_h [system] {
   header "inttypes.h"
   export *
 }
 // <iso646.h> provided by compiler.
-module std_locale_h [system] {
+module cxx03_std_locale_h [system] {
   header "locale.h"
   export *
 }
-module std_math_h [system] {
+module cxx03_std_math_h [system] {
   header "math.h"
   export *
 }
@@ -464,59 +464,59 @@
 // <signal.h> provided by C library.
 // FIXME: <stdalign.h> is missing.
 // <stdarg.h> provided by compiler.
-module std_stdatomic_h [system] {
+module cxx03_std_stdatomic_h [system] {
   header "stdatomic.h"
   export *
 }
-module std_stdbool_h [system] {
+module cxx03_std_stdbool_h [system] {
   // <stdbool.h>'s __bool_true_false_are_defined macro requires textual inclusion.
   textual header "stdbool.h"
   export *
 }
-module std_stddef_h [system] {
+module cxx03_std_stddef_h [system] {
   // <stddef.h>'s __need_* macros require textual inclusion.
   textual header "stddef.h"
   export *
 }
-module std_stdint_h [system] {
+module cxx03_std_stdint_h [system] {
   header "stdint.h"
   export *
 }
-module std_stdio_h [system] {
+module cxx03_std_stdio_h [system] {
   // <stdio.h>'s __need_* macros require textual inclusion.
   textual header "stdio.h"
   export *
 }
-module std_stdlib_h [system] {
+module cxx03_std_stdlib_h [system] {
   // <stdlib.h>'s __need_* macros require textual inclusion.
   textual header "stdlib.h"
   export *
 }
-module std_string_h [system] {
+module cxx03_std_string_h [system] {
   header "string.h"
   export *
 }
-module std_tgmath_h [system] {
+module cxx03_std_tgmath_h [system] {
   header "tgmath.h"
   export *
 }
-module std_uchar_h [system] {
+module cxx03_std_uchar_h [system] {
   header "uchar.h"
   export *
 }
 // <time.h> provided by C library.
-module std_wchar_h [system] {
+module cxx03_std_wchar_h [system] {
   // <wchar.h>'s __need_* macros require textual inclusion.
   textual header "wchar.h"
   export *
 }
-module std_wctype_h [system] {
+module cxx03_std_wctype_h [system] {
   header "wctype.h"
   export *
 }
 
 // Experimental C++ standard library interfaces
-module std_experimental [system] {
+module cxx03_std_experimental [system] {
   module iterator {
     header "experimental/iterator"
     export *
@@ -559,25 +559,25 @@
 
 // Convenience method to get all of the above modules in a single import statement.
 // Importing only the needed modules is likely to be more performant.
-module std [system] {
+module cxx03_std [system] {
   header "__std_clang_module"
   export *
 }
 
 // Implementation detail headers that are private to libc++. These modules
 // must not be directly imported.
-module std_private_assert            [system] {
+module cxx03_std_private_assert            [system] {
   header "__assert"
   export *
 }
-module std_private_bit_reference     [system] {
+module cxx03_std_private_bit_reference     [system] {
   header "__bit_reference"
   export *
 }
-module std_private_fwd_bit_reference [system] {
+module cxx03_std_private_fwd_bit_reference [system] {
   header "__fwd/bit_reference.h"
 }
-module std_private_config            [system] {
+module cxx03_std_private_config            [system] {
   textual header "__config"
   textual header "__configuration/abi.h"
   textual header "__configuration/availability.h"
@@ -586,813 +586,813 @@
   textual header "__configuration/platform.h"
   export *
 }
-module std_private_hash_table        [system] {
+module cxx03_std_private_hash_table        [system] {
   header "__hash_table"
   export *
 }
-module std_private_locale            [system] {
+module cxx03_std_private_locale            [system] {
   header "__locale"
   export *
 }
-module std_private_mbstate_t         [system] {
+module cxx03_std_private_mbstate_t         [system] {
   header "__mbstate_t.h"
   export *
 }
-module std_private_node_handle       [system] {
+module cxx03_std_private_node_handle       [system] {
   header "__node_handle"
   export *
 }
-module std_private_split_buffer      [system] {
+module cxx03_std_private_split_buffer      [system] {
   header "__split_buffer"
   export *
 }
-module std_private_std_mbstate_t     [system] {
+module cxx03_std_private_std_mbstate_t     [system] {
   header "__std_mbstate_t.h"
   export *
 }
-module std_private_tree              [system] {
+module cxx03_std_private_tree              [system] {
   header "__tree"
   export *
 }
-module std_private_undef_macros      [system] {
+module cxx03_std_private_undef_macros      [system] {
   textual header "__undef_macros"
   export *
 }
-module std_private_verbose_abort     [system] {
+module cxx03_std_private_verbose_abort     [system] {
   header "__verbose_abort"
   export *
 }
 
-module std_private_algorithm_adjacent_find                               [system] { header "__algorithm/adjacent_find.h" }
-module std_private_algorithm_all_of                                      [system] { header "__algorithm/all_of.h" }
-module std_private_algorithm_any_of                                      [system] { header "__algorithm/any_of.h" }
-module std_private_algorithm_binary_search                               [system] { header "__algorithm/binary_search.h" }
-module std_private_algorithm_clamp                                       [system] { header "__algorithm/clamp.h" }
-module std_private_algorithm_comp                                        [system] { header "__algorithm/comp.h" }
-module std_private_algorithm_comp_ref_type                               [system] { header "__algorithm/comp_ref_type.h" }
-module std_private_algorithm_copy                                        [system] {
+module cxx03_std_private_algorithm_adjacent_find                               [system] { header "__algorithm/adjacent_find.h" }
+module cxx03_std_private_algorithm_all_of                                      [system] { header "__algorithm/all_of.h" }
+module cxx03_std_private_algorithm_any_of                                      [system] { header "__algorithm/any_of.h" }
+module cxx03_std_private_algorithm_binary_search                               [system] { header "__algorithm/binary_search.h" }
+module cxx03_std_private_algorithm_clamp                                       [system] { header "__algorithm/clamp.h" }
+module cxx03_std_private_algorithm_comp                                        [system] { header "__algorithm/comp.h" }
+module cxx03_std_private_algorithm_comp_ref_type                               [system] { header "__algorithm/comp_ref_type.h" }
+module cxx03_std_private_algorithm_copy                                        [system] {
   header "__algorithm/copy.h"
   export std_private_algorithm_copy_move_common
 }
-module std_private_algorithm_copy_backward                               [system] { header "__algorithm/copy_backward.h" }
-module std_private_algorithm_copy_if                                     [system] { header "__algorithm/copy_if.h" }
-module std_private_algorithm_copy_move_common                            [system] {
+module cxx03_std_private_algorithm_copy_backward                               [system] { header "__algorithm/copy_backward.h" }
+module cxx03_std_private_algorithm_copy_if                                     [system] { header "__algorithm/copy_if.h" }
+module cxx03_std_private_algorithm_copy_move_common                            [system] {
   header "__algorithm/copy_move_common.h"
   export std_private_type_traits_is_trivially_copyable
 }
-module std_private_algorithm_copy_n                                      [system] { header "__algorithm/copy_n.h" }
-module std_private_algorithm_count                                       [system] { header "__algorithm/count.h" }
-module std_private_algorithm_count_if                                    [system] { header "__algorithm/count_if.h" }
-module std_private_algorithm_equal                                       [system] { header "__algorithm/equal.h" }
-module std_private_algorithm_equal_range                                 [system] { header "__algorithm/equal_range.h" }
-module std_private_algorithm_fill                                        [system] { header "__algorithm/fill.h" }
-module std_private_algorithm_fill_n                                      [system] { header "__algorithm/fill_n.h" }
-module std_private_algorithm_find                                        [system] {
+module cxx03_std_private_algorithm_copy_n                                      [system] { header "__algorithm/copy_n.h" }
+module cxx03_std_private_algorithm_count                                       [system] { header "__algorithm/count.h" }
+module cxx03_std_private_algorithm_count_if                                    [system] { header "__algorithm/count_if.h" }
+module cxx03_std_private_algorithm_equal                                       [system] { header "__algorithm/equal.h" }
+module cxx03_std_private_algorithm_equal_range                                 [system] { header "__algorithm/equal_range.h" }
+module cxx03_std_private_algorithm_fill                                        [system] { header "__algorithm/fill.h" }
+module cxx03_std_private_algorithm_fill_n                                      [system] { header "__algorithm/fill_n.h" }
+module cxx03_std_private_algorithm_find                                        [system] {
   header "__algorithm/find.h"
   export std_private_algorithm_unwrap_iter
 }
-module std_private_algorithm_find_end                                    [system] { header "__algorithm/find_end.h" }
-module std_private_algorithm_find_first_of                               [system] { header "__algorithm/find_first_of.h" }
-module std_private_algorithm_find_if                                     [system] { header "__algorithm/find_if.h" }
-module std_private_algorithm_find_if_not                                 [system] { header "__algorithm/find_if_not.h" }
-module std_private_algorithm_find_segment_if                             [system] { header "__algorithm/find_segment_if.h" }
-module std_private_algorithm_fold                                        [system] { header "__algorithm/fold.h" }
-module std_private_algorithm_for_each                                    [system] { header "__algorithm/for_each.h" }
-module std_private_algorithm_for_each_n                                  [system] { header "__algorithm/for_each_n.h" }
-module std_private_algorithm_for_each_segment                            [system] { header "__algorithm/for_each_segment.h" }
-module std_private_algorithm_generate                                    [system] { header "__algorithm/generate.h" }
-module std_private_algorithm_generate_n                                  [system] { header "__algorithm/generate_n.h" }
-module std_private_algorithm_half_positive                               [system] { header "__algorithm/half_positive.h" }
-module std_private_algorithm_in_found_result                             [system] { header "__algorithm/in_found_result.h" }
-module std_private_algorithm_in_fun_result                               [system] { header "__algorithm/in_fun_result.h" }
-module std_private_algorithm_in_in_out_result                            [system] { header "__algorithm/in_in_out_result.h" }
-module std_private_algorithm_in_in_result                                [system] { header "__algorithm/in_in_result.h" }
-module std_private_algorithm_in_out_out_result                           [system] { header "__algorithm/in_out_out_result.h" }
-module std_private_algorithm_in_out_result                               [system] { header "__algorithm/in_out_result.h" }
-module std_private_algorithm_includes                                    [system] { header "__algorithm/includes.h" }
-module std_private_algorithm_inplace_merge                               [system] { header "__algorithm/inplace_merge.h" }
-module std_private_algorithm_is_heap                                     [system] { header "__algorithm/is_heap.h" }
-module std_private_algorithm_is_heap_until                               [system] { header "__algorithm/is_heap_until.h" }
-module std_private_algorithm_is_partitioned                              [system] { header "__algorithm/is_partitioned.h" }
-module std_private_algorithm_is_permutation                              [system] { header "__algorithm/is_permutation.h" }
-module std_private_algorithm_is_sorted                                   [system] { header "__algorithm/is_sorted.h" }
-module std_private_algorithm_is_sorted_until                             [system] { header "__algorithm/is_sorted_until.h" }
-module std_private_algorithm_iter_swap                                   [system] { header "__algorithm/iter_swap.h" }
-module std_private_algorithm_iterator_operations                         [system] {
+module cxx03_std_private_algorithm_find_end                                    [system] { header "__algorithm/find_end.h" }
+module cxx03_std_private_algorithm_find_first_of                               [system] { header "__algorithm/find_first_of.h" }
+module cxx03_std_private_algorithm_find_if                                     [system] { header "__algorithm/find_if.h" }
+module cxx03_std_private_algorithm_find_if_not                                 [system] { header "__algorithm/find_if_not.h" }
+module cxx03_std_private_algorithm_find_segment_if                             [system] { header "__algorithm/find_segment_if.h" }
+module cxx03_std_private_algorithm_fold                                        [system] { header "__algorithm/fold.h" }
+module cxx03_std_private_algorithm_for_each                                    [system] { header "__algorithm/for_each.h" }
+module cxx03_std_private_algorithm_for_each_n                                  [system] { header "__algorithm/for_each_n.h" }
+module cxx03_std_private_algorithm_for_each_segment                            [system] { header "__algorithm/for_each_segment.h" }
+module cxx03_std_private_algorithm_generate                                    [system] { header "__algorithm/generate.h" }
+module cxx03_std_private_algorithm_generate_n                                  [system] { header "__algorithm/generate_n.h" }
+module cxx03_std_private_algorithm_half_positive                               [system] { header "__algorithm/half_positive.h" }
+module cxx03_std_private_algorithm_in_found_result                             [system] { header "__algorithm/in_found_result.h" }
+module cxx03_std_private_algorithm_in_fun_result                               [system] { header "__algorithm/in_fun_result.h" }
+module cxx03_std_private_algorithm_in_in_out_result                            [system] { header "__algorithm/in_in_out_result.h" }
+module cxx03_std_private_algorithm_in_in_result                                [system] { header "__algorithm/in_in_result.h" }
+module cxx03_std_private_algorithm_in_out_out_result                           [system] { header "__algorithm/in_out_out_result.h" }
+module cxx03_std_private_algorithm_in_out_result                               [system] { header "__algorithm/in_out_result.h" }
+module cxx03_std_private_algorithm_includes                                    [system] { header "__algorithm/includes.h" }
+module cxx03_std_private_algorithm_inplace_merge                               [system] { header "__algorithm/inplace_merge.h" }
+module cxx03_std_private_algorithm_is_heap                                     [system] { header "__algorithm/is_heap.h" }
+module cxx03_std_private_algorithm_is_heap_until                               [system] { header "__algorithm/is_heap_until.h" }
+module cxx03_std_private_algorithm_is_partitioned                              [system] { header "__algorithm/is_partitioned.h" }
+module cxx03_std_private_algorithm_is_permutation                              [system] { header "__algorithm/is_permutation.h" }
+module cxx03_std_private_algorithm_is_sorted                                   [system] { header "__algorithm/is_sorted.h" }
+module cxx03_std_private_algorithm_is_sorted_until                             [system] { header "__algorithm/is_sorted_until.h" }
+module cxx03_std_private_algorithm_iter_swap                                   [system] { header "__algorithm/iter_swap.h" }
+module cxx03_std_private_algorithm_iterator_operations                         [system] {
   header "__algorithm/iterator_operations.h"
   export *
 }
-module std_private_algorithm_lexicographical_compare                     [system] { header "__algorithm/lexicographical_compare.h" }
-module std_private_algorithm_lexicographical_compare_three_way           [system] { header "__algorithm/lexicographical_compare_three_way.h" }
-module std_private_algorithm_lower_bound                                 [system] { header "__algorithm/lower_bound.h" }
-module std_private_algorithm_make_heap                                   [system] { header "__algorithm/make_heap.h" }
-module std_private_algorithm_make_projected                              [system] { header "__algorithm/make_projected.h" }
-module std_private_algorithm_max                                         [system] { header "__algorithm/max.h" }
-module std_private_algorithm_max_element                                 [system] { header "__algorithm/max_element.h" }
-module std_private_algorithm_merge                                       [system] { header "__algorithm/merge.h" }
-module std_private_algorithm_min                                         [system] { header "__algorithm/min.h" }
-module std_private_algorithm_min_element                                 [system] { header "__algorithm/min_element.h" }
-module std_private_algorithm_min_max_result                              [system] { header "__algorithm/min_max_result.h" }
-module std_private_algorithm_minmax                                      [system] {
+module cxx03_std_private_algorithm_lexicographical_compare                     [system] { header "__algorithm/lexicographical_compare.h" }
+module cxx03_std_private_algorithm_lexicographical_compare_three_way           [system] { header "__algorithm/lexicographical_compare_three_way.h" }
+module cxx03_std_private_algorithm_lower_bound                                 [system] { header "__algorithm/lower_bound.h" }
+module cxx03_std_private_algorithm_make_heap                                   [system] { header "__algorithm/make_heap.h" }
+module cxx03_std_private_algorithm_make_projected                              [system] { header "__algorithm/make_projected.h" }
+module cxx03_std_private_algorithm_max                                         [system] { header "__algorithm/max.h" }
+module cxx03_std_private_algorithm_max_element                                 [system] { header "__algorithm/max_element.h" }
+module cxx03_std_private_algorithm_merge                                       [system] { header "__algorithm/merge.h" }
+module cxx03_std_private_algorithm_min                                         [system] { header "__algorithm/min.h" }
+module cxx03_std_private_algorithm_min_element                                 [system] { header "__algorithm/min_element.h" }
+module cxx03_std_private_algorithm_min_max_result                              [system] { header "__algorithm/min_max_result.h" }
+module cxx03_std_private_algorithm_minmax                                      [system] {
   header "__algorithm/minmax.h"
   export *
 }
-module std_private_algorithm_minmax_element                              [system] { header "__algorithm/minmax_element.h" }
-module std_private_algorithm_mismatch                                    [system] {
+module cxx03_std_private_algorithm_minmax_element                              [system] { header "__algorithm/minmax_element.h" }
+module cxx03_std_private_algorithm_mismatch                                    [system] {
   header "__algorithm/mismatch.h"
   export std_private_algorithm_simd_utils
   export std_private_iterator_aliasing_iterator
 }
-module std_private_algorithm_move                                        [system] { header "__algorithm/move.h" }
-module std_private_algorithm_move_backward                               [system] { header "__algorithm/move_backward.h" }
-module std_private_algorithm_next_permutation                            [system] { header "__algorithm/next_permutation.h" }
-module std_private_algorithm_none_of                                     [system] { header "__algorithm/none_of.h" }
-module std_private_algorithm_nth_element                                 [system] { header "__algorithm/nth_element.h" }
-module std_private_algorithm_partial_sort                                [system] { header "__algorithm/partial_sort.h" }
-module std_private_algorithm_partial_sort_copy                           [system] { header "__algorithm/partial_sort_copy.h" }
-module std_private_algorithm_partition                                   [system] { header "__algorithm/partition.h" }
-module std_private_algorithm_partition_copy                              [system] { header "__algorithm/partition_copy.h" }
-module std_private_algorithm_partition_point                             [system] { header "__algorithm/partition_point.h" }
-module std_private_algorithm_pop_heap                                    [system] { header "__algorithm/pop_heap.h" }
-module std_private_algorithm_prev_permutation                            [system] { header "__algorithm/prev_permutation.h" }
-module std_private_algorithm_pstl                                        [system] {
+module cxx03_std_private_algorithm_move                                        [system] { header "__algorithm/move.h" }
+module cxx03_std_private_algorithm_move_backward                               [system] { header "__algorithm/move_backward.h" }
+module cxx03_std_private_algorithm_next_permutation                            [system] { header "__algorithm/next_permutation.h" }
+module cxx03_std_private_algorithm_none_of                                     [system] { header "__algorithm/none_of.h" }
+module cxx03_std_private_algorithm_nth_element                                 [system] { header "__algorithm/nth_element.h" }
+module cxx03_std_private_algorithm_partial_sort                                [system] { header "__algorithm/partial_sort.h" }
+module cxx03_std_private_algorithm_partial_sort_copy                           [system] { header "__algorithm/partial_sort_copy.h" }
+module cxx03_std_private_algorithm_partition                                   [system] { header "__algorithm/partition.h" }
+module cxx03_std_private_algorithm_partition_copy                              [system] { header "__algorithm/partition_copy.h" }
+module cxx03_std_private_algorithm_partition_point                             [system] { header "__algorithm/partition_point.h" }
+module cxx03_std_private_algorithm_pop_heap                                    [system] { header "__algorithm/pop_heap.h" }
+module cxx03_std_private_algorithm_prev_permutation                            [system] { header "__algorithm/prev_permutation.h" }
+module cxx03_std_private_algorithm_pstl                                        [system] {
   header "__algorithm/pstl.h"
   export *
 }
-module std_private_algorithm_push_heap                                   [system] { header "__algorithm/push_heap.h" }
-module std_private_algorithm_ranges_adjacent_find                        [system] { header "__algorithm/ranges_adjacent_find.h" }
-module std_private_algorithm_ranges_all_of                               [system] { header "__algorithm/ranges_all_of.h" }
-module std_private_algorithm_ranges_any_of                               [system] { header "__algorithm/ranges_any_of.h" }
-module std_private_algorithm_ranges_binary_search                        [system] {
+module cxx03_std_private_algorithm_push_heap                                   [system] { header "__algorithm/push_heap.h" }
+module cxx03_std_private_algorithm_ranges_adjacent_find                        [system] { header "__algorithm/ranges_adjacent_find.h" }
+module cxx03_std_private_algorithm_ranges_all_of                               [system] { header "__algorithm/ranges_all_of.h" }
+module cxx03_std_private_algorithm_ranges_any_of                               [system] { header "__algorithm/ranges_any_of.h" }
+module cxx03_std_private_algorithm_ranges_binary_search                        [system] {
   header "__algorithm/ranges_binary_search.h"
   export std_private_functional_ranges_operations
 }
-module std_private_algorithm_ranges_clamp                                [system] {
+module cxx03_std_private_algorithm_ranges_clamp                                [system] {
   header "__algorithm/ranges_clamp.h"
   export std_private_functional_ranges_operations
 }
-module std_private_algorithm_ranges_contains                             [system] { header "__algorithm/ranges_contains.h" }
-module std_private_algorithm_ranges_contains_subrange                    [system] { header "__algorithm/ranges_contains_subrange.h" }
-module std_private_algorithm_ranges_copy                                 [system] {
+module cxx03_std_private_algorithm_ranges_contains                             [system] { header "__algorithm/ranges_contains.h" }
+module cxx03_std_private_algorithm_ranges_contains_subrange                    [system] { header "__algorithm/ranges_contains_subrange.h" }
+module cxx03_std_private_algorithm_ranges_copy                                 [system] {
   header "__algorithm/ranges_copy.h"
   export std_private_algorithm_in_out_result
 }
-module std_private_algorithm_ranges_copy_backward                        [system] {
+module cxx03_std_private_algorithm_ranges_copy_backward                        [system] {
   header "__algorithm/ranges_copy_backward.h"
   export std_private_algorithm_in_out_result
 }
-module std_private_algorithm_ranges_copy_if                              [system] {
+module cxx03_std_private_algorithm_ranges_copy_if                              [system] {
   header "__algorithm/ranges_copy_if.h"
   export std_private_algorithm_in_out_result
 }
-module std_private_algorithm_ranges_copy_n                               [system] {
+module cxx03_std_private_algorithm_ranges_copy_n                               [system] {
   header "__algorithm/ranges_copy_n.h"
   export std_private_algorithm_in_out_result
 }
-module std_private_algorithm_ranges_count                                [system] { header "__algorithm/ranges_count.h" }
-module std_private_algorithm_ranges_count_if                             [system] { header "__algorithm/ranges_count_if.h" }
-module std_private_algorithm_ranges_ends_with                            [system] { header "__algorithm/ranges_ends_with.h" }
-module std_private_algorithm_ranges_equal                                [system] { header "__algorithm/ranges_equal.h" }
-module std_private_algorithm_ranges_equal_range                          [system] {
+module cxx03_std_private_algorithm_ranges_count                                [system] { header "__algorithm/ranges_count.h" }
+module cxx03_std_private_algorithm_ranges_count_if                             [system] { header "__algorithm/ranges_count_if.h" }
+module cxx03_std_private_algorithm_ranges_ends_with                            [system] { header "__algorithm/ranges_ends_with.h" }
+module cxx03_std_private_algorithm_ranges_equal                                [system] { header "__algorithm/ranges_equal.h" }
+module cxx03_std_private_algorithm_ranges_equal_range                          [system] {
   header "__algorithm/ranges_equal_range.h"
   export std_private_functional_ranges_operations
 }
-module std_private_algorithm_ranges_fill                                 [system] { header "__algorithm/ranges_fill.h" }
-module std_private_algorithm_ranges_fill_n                               [system] { header "__algorithm/ranges_fill_n.h" }
-module std_private_algorithm_ranges_find                                 [system] { header "__algorithm/ranges_find.h" }
-module std_private_algorithm_ranges_find_end                             [system] { header "__algorithm/ranges_find_end.h" }
-module std_private_algorithm_ranges_find_first_of                        [system] { header "__algorithm/ranges_find_first_of.h" }
-module std_private_algorithm_ranges_find_if                              [system] { header "__algorithm/ranges_find_if.h" }
-module std_private_algorithm_ranges_find_if_not                          [system] { header "__algorithm/ranges_find_if_not.h" }
-module std_private_algorithm_ranges_find_last                            [system] { header "__algorithm/ranges_find_last.h" }
-module std_private_algorithm_ranges_for_each                             [system] {
+module cxx03_std_private_algorithm_ranges_fill                                 [system] { header "__algorithm/ranges_fill.h" }
+module cxx03_std_private_algorithm_ranges_fill_n                               [system] { header "__algorithm/ranges_fill_n.h" }
+module cxx03_std_private_algorithm_ranges_find                                 [system] { header "__algorithm/ranges_find.h" }
+module cxx03_std_private_algorithm_ranges_find_end                             [system] { header "__algorithm/ranges_find_end.h" }
+module cxx03_std_private_algorithm_ranges_find_first_of                        [system] { header "__algorithm/ranges_find_first_of.h" }
+module cxx03_std_private_algorithm_ranges_find_if                              [system] { header "__algorithm/ranges_find_if.h" }
+module cxx03_std_private_algorithm_ranges_find_if_not                          [system] { header "__algorithm/ranges_find_if_not.h" }
+module cxx03_std_private_algorithm_ranges_find_last                            [system] { header "__algorithm/ranges_find_last.h" }
+module cxx03_std_private_algorithm_ranges_for_each                             [system] {
   header "__algorithm/ranges_for_each.h"
   export std_private_algorithm_in_fun_result
 }
-module std_private_algorithm_ranges_for_each_n                           [system] {
+module cxx03_std_private_algorithm_ranges_for_each_n                           [system] {
   header "__algorithm/ranges_for_each_n.h"
   export std_private_algorithm_in_fun_result
 }
-module std_private_algorithm_ranges_generate                             [system] { header "__algorithm/ranges_generate.h" }
-module std_private_algorithm_ranges_generate_n                           [system] { header "__algorithm/ranges_generate_n.h" }
-module std_private_algorithm_ranges_includes                             [system] {
+module cxx03_std_private_algorithm_ranges_generate                             [system] { header "__algorithm/ranges_generate.h" }
+module cxx03_std_private_algorithm_ranges_generate_n                           [system] { header "__algorithm/ranges_generate_n.h" }
+module cxx03_std_private_algorithm_ranges_includes                             [system] {
   header "__algorithm/ranges_includes.h"
   export std_private_functional_ranges_operations
 }
-module std_private_algorithm_ranges_inplace_merge                        [system] {
+module cxx03_std_private_algorithm_ranges_inplace_merge                        [system] {
   header "__algorithm/ranges_inplace_merge.h"
   export std_private_functional_ranges_operations
 }
-module std_private_algorithm_ranges_is_heap                              [system] {
+module cxx03_std_private_algorithm_ranges_is_heap                              [system] {
   header "__algorithm/ranges_is_heap.h"
   export std_private_functional_ranges_operations
 }
-module std_private_algorithm_ranges_is_heap_until                        [system] {
+module cxx03_std_private_algorithm_ranges_is_heap_until                        [system] {
   header "__algorithm/ranges_is_heap_until.h"
   export std_private_functional_ranges_operations
 }
-module std_private_algorithm_ranges_is_partitioned                       [system] { header "__algorithm/ranges_is_partitioned.h" }
-module std_private_algorithm_ranges_is_permutation                       [system] { header "__algorithm/ranges_is_permutation.h" }
-module std_private_algorithm_ranges_is_sorted                            [system] {
+module cxx03_std_private_algorithm_ranges_is_partitioned                       [system] { header "__algorithm/ranges_is_partitioned.h" }
+module cxx03_std_private_algorithm_ranges_is_permutation                       [system] { header "__algorithm/ranges_is_permutation.h" }
+module cxx03_std_private_algorithm_ranges_is_sorted                            [system] {
   header "__algorithm/ranges_is_sorted.h"
   export std_private_functional_ranges_operations
 }
-module std_private_algorithm_ranges_is_sorted_until                      [system] {
+module cxx03_std_private_algorithm_ranges_is_sorted_until                      [system] {
   header "__algorithm/ranges_is_sorted_until.h"
   export std_private_functional_ranges_operations
 }
-module std_private_algorithm_ranges_iterator_concept                     [system] { header "__algorithm/ranges_iterator_concept.h" }
-module std_private_algorithm_ranges_lexicographical_compare              [system] {
+module cxx03_std_private_algorithm_ranges_iterator_concept                     [system] { header "__algorithm/ranges_iterator_concept.h" }
+module cxx03_std_private_algorithm_ranges_lexicographical_compare              [system] {
   header "__algorithm/ranges_lexicographical_compare.h"
   export std_private_functional_ranges_operations
 }
-module std_private_algorithm_ranges_lower_bound                          [system] {
+module cxx03_std_private_algorithm_ranges_lower_bound                          [system] {
   header "__algorithm/ranges_lower_bound.h"
   export std_private_functional_ranges_operations
 }
-module std_private_algorithm_ranges_make_heap                            [system] {
+module cxx03_std_private_algorithm_ranges_make_heap                            [system] {
   header "__algorithm/ranges_make_heap.h"
   export std_private_functional_ranges_operations
 }
-module std_private_algorithm_ranges_max                                  [system] {
+module cxx03_std_private_algorithm_ranges_max                                  [system] {
   header "__algorithm/ranges_max.h"
   export std_private_functional_ranges_operations
 }
-module std_private_algorithm_ranges_max_element                          [system] {
+module cxx03_std_private_algorithm_ranges_max_element                          [system] {
   header "__algorithm/ranges_max_element.h"
   export std_private_functional_ranges_operations
 }
-module std_private_algorithm_ranges_merge                                [system] {
+module cxx03_std_private_algorithm_ranges_merge                                [system] {
   header "__algorithm/ranges_merge.h"
   export std_private_algorithm_in_in_out_result
 }
-module std_private_algorithm_ranges_min                                  [system] {
+module cxx03_std_private_algorithm_ranges_min                                  [system] {
   header "__algorithm/ranges_min.h"
   export std_private_functional_ranges_operations
 }
-module std_private_algorithm_ranges_min_element                          [system] {
+module cxx03_std_private_algorithm_ranges_min_element                          [system] {
   header "__algorithm/ranges_min_element.h"
   export std_private_functional_ranges_operations
 }
-module std_private_algorithm_ranges_minmax                               [system] {
+module cxx03_std_private_algorithm_ranges_minmax                               [system] {
   header "__algorithm/ranges_minmax.h"
   export std_private_functional_ranges_operations
   export std_private_algorithm_min_max_result
 }
-module std_private_algorithm_ranges_minmax_element                       [system] {
+module cxx03_std_private_algorithm_ranges_minmax_element                       [system] {
   header "__algorithm/ranges_minmax_element.h"
   export std_private_functional_ranges_operations
   export std_private_algorithm_min_max_result
 }
-module std_private_algorithm_ranges_mismatch                             [system] {
+module cxx03_std_private_algorithm_ranges_mismatch                             [system] {
   header "__algorithm/ranges_mismatch.h"
   export std_private_algorithm_in_in_result
 }
-module std_private_algorithm_ranges_move                                 [system] {
+module cxx03_std_private_algorithm_ranges_move                                 [system] {
   header "__algorithm/ranges_move.h"
   export std_private_algorithm_in_out_result
 }
-module std_private_algorithm_ranges_move_backward                        [system] {
+module cxx03_std_private_algorithm_ranges_move_backward                        [system] {
   header "__algorithm/ranges_move_backward.h"
   export std_private_algorithm_in_out_result
 }
-module std_private_algorithm_ranges_next_permutation                     [system] {
+module cxx03_std_private_algorithm_ranges_next_permutation                     [system] {
   header "__algorithm/ranges_next_permutation.h"
   export std_private_algorithm_in_found_result
   export std_private_functional_ranges_operations
 }
-module std_private_algorithm_ranges_none_of                              [system] { header "__algorithm/ranges_none_of.h" }
-module std_private_algorithm_ranges_nth_element                          [system] {
+module cxx03_std_private_algorithm_ranges_none_of                              [system] { header "__algorithm/ranges_none_of.h" }
+module cxx03_std_private_algorithm_ranges_nth_element                          [system] {
   header "__algorithm/ranges_nth_element.h"
   export std_private_functional_ranges_operations
 }
-module std_private_algorithm_ranges_partial_sort                         [system] {
+module cxx03_std_private_algorithm_ranges_partial_sort                         [system] {
   header "__algorithm/ranges_partial_sort.h"
   export std_private_functional_ranges_operations
 }
-module std_private_algorithm_ranges_partial_sort_copy                    [system] {
+module cxx03_std_private_algorithm_ranges_partial_sort_copy                    [system] {
   header "__algorithm/ranges_partial_sort_copy.h"
   export std_private_algorithm_in_out_result
   export std_private_functional_ranges_operations
 }
-module std_private_algorithm_ranges_partition                            [system] { header "__algorithm/ranges_partition.h" }
-module std_private_algorithm_ranges_partition_copy                       [system] { header "__algorithm/ranges_partition_copy.h" }
-module std_private_algorithm_ranges_partition_point                      [system] { header "__algorithm/ranges_partition_point.h" }
-module std_private_algorithm_ranges_pop_heap                             [system] {
+module cxx03_std_private_algorithm_ranges_partition                            [system] { header "__algorithm/ranges_partition.h" }
+module cxx03_std_private_algorithm_ranges_partition_copy                       [system] { header "__algorithm/ranges_partition_copy.h" }
+module cxx03_std_private_algorithm_ranges_partition_point                      [system] { header "__algorithm/ranges_partition_point.h" }
+module cxx03_std_private_algorithm_ranges_pop_heap                             [system] {
   header "__algorithm/ranges_pop_heap.h"
   export std_private_functional_ranges_operations
 }
-module std_private_algorithm_ranges_prev_permutation                     [system] {
+module cxx03_std_private_algorithm_ranges_prev_permutation                     [system] {
   header "__algorithm/ranges_prev_permutation.h"
   export std_private_algorithm_in_found_result
   export std_private_functional_ranges_operations
 }
-module std_private_algorithm_ranges_push_heap                            [system] {
+module cxx03_std_private_algorithm_ranges_push_heap                            [system] {
   header "__algorithm/ranges_push_heap.h"
   export std_private_functional_ranges_operations
 }
-module std_private_algorithm_ranges_remove                               [system] { header "__algorithm/ranges_remove.h" }
-module std_private_algorithm_ranges_remove_copy                          [system] {
+module cxx03_std_private_algorithm_ranges_remove                               [system] { header "__algorithm/ranges_remove.h" }
+module cxx03_std_private_algorithm_ranges_remove_copy                          [system] {
   header "__algorithm/ranges_remove_copy.h"
   export std_private_algorithm_in_out_result
 }
-module std_private_algorithm_ranges_remove_copy_if                       [system] {
+module cxx03_std_private_algorithm_ranges_remove_copy_if                       [system] {
   header "__algorithm/ranges_remove_copy_if.h"
   export std_private_algorithm_in_out_result
 }
-module std_private_algorithm_ranges_remove_if                            [system] { header "__algorithm/ranges_remove_if.h" }
-module std_private_algorithm_ranges_replace                              [system] { header "__algorithm/ranges_replace.h" }
-module std_private_algorithm_ranges_replace_copy                         [system] {
+module cxx03_std_private_algorithm_ranges_remove_if                            [system] { header "__algorithm/ranges_remove_if.h" }
+module cxx03_std_private_algorithm_ranges_replace                              [system] { header "__algorithm/ranges_replace.h" }
+module cxx03_std_private_algorithm_ranges_replace_copy                         [system] {
   header "__algorithm/ranges_replace_copy.h"
   export std_private_algorithm_in_out_result
 }
-module std_private_algorithm_ranges_replace_copy_if                      [system] {
+module cxx03_std_private_algorithm_ranges_replace_copy_if                      [system] {
   header "__algorithm/ranges_replace_copy_if.h"
   export std_private_algorithm_in_out_result
 }
-module std_private_algorithm_ranges_replace_if                           [system] { header "__algorithm/ranges_replace_if.h" }
-module std_private_algorithm_ranges_reverse                              [system] { header "__algorithm/ranges_reverse.h" }
-module std_private_algorithm_ranges_reverse_copy                         [system] {
+module cxx03_std_private_algorithm_ranges_replace_if                           [system] { header "__algorithm/ranges_replace_if.h" }
+module cxx03_std_private_algorithm_ranges_reverse                              [system] { header "__algorithm/ranges_reverse.h" }
+module cxx03_std_private_algorithm_ranges_reverse_copy                         [system] {
   header "__algorithm/ranges_reverse_copy.h"
   export std_private_algorithm_in_out_result
 }
-module std_private_algorithm_ranges_rotate                               [system] { header "__algorithm/ranges_rotate.h" }
-module std_private_algorithm_ranges_rotate_copy                          [system] {
+module cxx03_std_private_algorithm_ranges_rotate                               [system] { header "__algorithm/ranges_rotate.h" }
+module cxx03_std_private_algorithm_ranges_rotate_copy                          [system] {
   header "__algorithm/ranges_rotate_copy.h"
   export std_private_algorithm_in_out_result
 }
-module std_private_algorithm_ranges_sample                               [system] { header "__algorithm/ranges_sample.h" }
-module std_private_algorithm_ranges_search                               [system] { header "__algorithm/ranges_search.h" }
-module std_private_algorithm_ranges_search_n                             [system] { header "__algorithm/ranges_search_n.h" }
-module std_private_algorithm_ranges_set_difference                       [system] {
+module cxx03_std_private_algorithm_ranges_sample                               [system] { header "__algorithm/ranges_sample.h" }
+module cxx03_std_private_algorithm_ranges_search                               [system] { header "__algorithm/ranges_search.h" }
+module cxx03_std_private_algorithm_ranges_search_n                             [system] { header "__algorithm/ranges_search_n.h" }
+module cxx03_std_private_algorithm_ranges_set_difference                       [system] {
   header "__algorithm/ranges_set_difference.h"
   export std_private_algorithm_in_out_result
 }
-module std_private_algorithm_ranges_set_intersection                     [system] {
+module cxx03_std_private_algorithm_ranges_set_intersection                     [system] {
   header "__algorithm/ranges_set_intersection.h"
   export std_private_algorithm_in_in_out_result
 }
-module std_private_algorithm_ranges_set_symmetric_difference             [system] {
+module cxx03_std_private_algorithm_ranges_set_symmetric_difference             [system] {
   header "__algorithm/ranges_set_symmetric_difference.h"
   export std_private_algorithm_in_in_out_result
   export std_private_functional_ranges_operations
 }
-module std_private_algorithm_ranges_set_union                            [system] {
+module cxx03_std_private_algorithm_ranges_set_union                            [system] {
   header "__algorithm/ranges_set_union.h"
   export std_private_algorithm_in_in_out_result
   export std_private_functional_ranges_operations
 }
-module std_private_algorithm_ranges_shuffle                              [system] { header "__algorithm/ranges_shuffle.h" }
-module std_private_algorithm_ranges_sort                                 [system] {
+module cxx03_std_private_algorithm_ranges_shuffle                              [system] { header "__algorithm/ranges_shuffle.h" }
+module cxx03_std_private_algorithm_ranges_sort                                 [system] {
   header "__algorithm/ranges_sort.h"
   export std_private_algorithm_make_projected
   export std_private_functional_ranges_operations
 }
-module std_private_algorithm_ranges_sort_heap                            [system] {
+module cxx03_std_private_algorithm_ranges_sort_heap                            [system] {
   header "__algorithm/ranges_sort_heap.h"
   export std_private_functional_ranges_operations
 }
-module std_private_algorithm_ranges_stable_partition                     [system] { header "__algorithm/ranges_stable_partition.h" }
-module std_private_algorithm_ranges_stable_sort                          [system] {
+module cxx03_std_private_algorithm_ranges_stable_partition                     [system] { header "__algorithm/ranges_stable_partition.h" }
+module cxx03_std_private_algorithm_ranges_stable_sort                          [system] {
   header "__algorithm/ranges_stable_sort.h"
   export std_private_functional_ranges_operations
 }
-module std_private_algorithm_ranges_starts_with                          [system] { header "__algorithm/ranges_starts_with.h" }
-module std_private_algorithm_ranges_swap_ranges                          [system] {
+module cxx03_std_private_algorithm_ranges_starts_with                          [system] { header "__algorithm/ranges_starts_with.h" }
+module cxx03_std_private_algorithm_ranges_swap_ranges                          [system] {
   header "__algorithm/ranges_swap_ranges.h"
   export std_private_algorithm_in_in_result
 }
-module std_private_algorithm_ranges_transform                            [system] {
+module cxx03_std_private_algorithm_ranges_transform                            [system] {
   header "__algorithm/ranges_transform.h"
   export std_private_algorithm_in_in_out_result
   export std_private_algorithm_in_out_result
 }
-module std_private_algorithm_ranges_unique                               [system] { header "__algorithm/ranges_unique.h" }
-module std_private_algorithm_ranges_unique_copy                          [system] {
+module cxx03_std_private_algorithm_ranges_unique                               [system] { header "__algorithm/ranges_unique.h" }
+module cxx03_std_private_algorithm_ranges_unique_copy                          [system] {
   header "__algorithm/ranges_unique_copy.h"
   export std_private_algorithm_in_out_result
 }
-module std_private_algorithm_ranges_upper_bound                          [system] {
+module cxx03_std_private_algorithm_ranges_upper_bound                          [system] {
   header "__algorithm/ranges_upper_bound.h"
   export std_private_functional_ranges_operations
 }
-module std_private_algorithm_remove                                      [system] { header "__algorithm/remove.h" }
-module std_private_algorithm_remove_copy                                 [system] { header "__algorithm/remove_copy.h" }
-module std_private_algorithm_remove_copy_if                              [system] { header "__algorithm/remove_copy_if.h" }
-module std_private_algorithm_remove_if                                   [system] { header "__algorithm/remove_if.h" }
-module std_private_algorithm_replace                                     [system] { header "__algorithm/replace.h" }
-module std_private_algorithm_replace_copy                                [system] { header "__algorithm/replace_copy.h" }
-module std_private_algorithm_replace_copy_if                             [system] { header "__algorithm/replace_copy_if.h" }
-module std_private_algorithm_replace_if                                  [system] { header "__algorithm/replace_if.h" }
-module std_private_algorithm_reverse                                     [system] { header "__algorithm/reverse.h" }
-module std_private_algorithm_reverse_copy                                [system] { header "__algorithm/reverse_copy.h" }
-module std_private_algorithm_rotate                                      [system] { header "__algorithm/rotate.h" }
-module std_private_algorithm_rotate_copy                                 [system] { header "__algorithm/rotate_copy.h" }
-module std_private_algorithm_sample                                      [system] { header "__algorithm/sample.h" }
-module std_private_algorithm_search                                      [system] { header "__algorithm/search.h" }
-module std_private_algorithm_search_n                                    [system] { header "__algorithm/search_n.h" }
-module std_private_algorithm_set_difference                              [system] { header "__algorithm/set_difference.h" }
-module std_private_algorithm_set_intersection                            [system] { header "__algorithm/set_intersection.h" }
-module std_private_algorithm_set_symmetric_difference                    [system] { header "__algorithm/set_symmetric_difference.h" }
-module std_private_algorithm_set_union                                   [system] { header "__algorithm/set_union.h" }
-module std_private_algorithm_shift_left                                  [system] { header "__algorithm/shift_left.h" }
-module std_private_algorithm_shift_right                                 [system] { header "__algorithm/shift_right.h" }
-module std_private_algorithm_shuffle                                     [system] { header "__algorithm/shuffle.h" }
-module std_private_algorithm_sift_down                                   [system] { header "__algorithm/sift_down.h" }
-module std_private_algorithm_sort                                        [system] {
+module cxx03_std_private_algorithm_remove                                      [system] { header "__algorithm/remove.h" }
+module cxx03_std_private_algorithm_remove_copy                                 [system] { header "__algorithm/remove_copy.h" }
+module cxx03_std_private_algorithm_remove_copy_if                              [system] { header "__algorithm/remove_copy_if.h" }
+module cxx03_std_private_algorithm_remove_if                                   [system] { header "__algorithm/remove_if.h" }
+module cxx03_std_private_algorithm_replace                                     [system] { header "__algorithm/replace.h" }
+module cxx03_std_private_algorithm_replace_copy                                [system] { header "__algorithm/replace_copy.h" }
+module cxx03_std_private_algorithm_replace_copy_if                             [system] { header "__algorithm/replace_copy_if.h" }
+module cxx03_std_private_algorithm_replace_if                                  [system] { header "__algorithm/replace_if.h" }
+module cxx03_std_private_algorithm_reverse                                     [system] { header "__algorithm/reverse.h" }
+module cxx03_std_private_algorithm_reverse_copy                                [system] { header "__algorithm/reverse_copy.h" }
+module cxx03_std_private_algorithm_rotate                                      [system] { header "__algorithm/rotate.h" }
+module cxx03_std_private_algorithm_rotate_copy                                 [system] { header "__algorithm/rotate_copy.h" }
+module cxx03_std_private_algorithm_sample                                      [system] { header "__algorithm/sample.h" }
+module cxx03_std_private_algorithm_search                                      [system] { header "__algorithm/search.h" }
+module cxx03_std_private_algorithm_search_n                                    [system] { header "__algorithm/search_n.h" }
+module cxx03_std_private_algorithm_set_difference                              [system] { header "__algorithm/set_difference.h" }
+module cxx03_std_private_algorithm_set_intersection                            [system] { header "__algorithm/set_intersection.h" }
+module cxx03_std_private_algorithm_set_symmetric_difference                    [system] { header "__algorithm/set_symmetric_difference.h" }
+module cxx03_std_private_algorithm_set_union                                   [system] { header "__algorithm/set_union.h" }
+module cxx03_std_private_algorithm_shift_left                                  [system] { header "__algorithm/shift_left.h" }
+module cxx03_std_private_algorithm_shift_right                                 [system] { header "__algorithm/shift_right.h" }
+module cxx03_std_private_algorithm_shuffle                                     [system] { header "__algorithm/shuffle.h" }
+module cxx03_std_private_algorithm_sift_down                                   [system] { header "__algorithm/sift_down.h" }
+module cxx03_std_private_algorithm_sort                                        [system] {
   header "__algorithm/sort.h"
   export std_private_debug_utils_strict_weak_ordering_check
 }
-module std_private_algorithm_simd_utils                                  [system] { header "__algorithm/simd_utils.h" }
-module std_private_algorithm_sort_heap                                   [system] { header "__algorithm/sort_heap.h" }
-module std_private_algorithm_stable_partition                            [system] { header "__algorithm/stable_partition.h" }
-module std_private_algorithm_stable_sort                                 [system] { header "__algorithm/stable_sort.h" }
-module std_private_algorithm_swap_ranges                                 [system] {
+module cxx03_std_private_algorithm_simd_utils                                  [system] { header "__algorithm/simd_utils.h" }
+module cxx03_std_private_algorithm_sort_heap                                   [system] { header "__algorithm/sort_heap.h" }
+module cxx03_std_private_algorithm_stable_partition                            [system] { header "__algorithm/stable_partition.h" }
+module cxx03_std_private_algorithm_stable_sort                                 [system] { header "__algorithm/stable_sort.h" }
+module cxx03_std_private_algorithm_swap_ranges                                 [system] {
   header "__algorithm/swap_ranges.h"
   export std_private_algorithm_iterator_operations
 }
-module std_private_algorithm_three_way_comp_ref_type                     [system] { header "__algorithm/three_way_comp_ref_type.h" }
-module std_private_algorithm_transform                                   [system] { header "__algorithm/transform.h" }
-module std_private_algorithm_uniform_random_bit_generator_adaptor        [system] { header "__algorithm/uniform_random_bit_generator_adaptor.h" }
-module std_private_algorithm_unique                                      [system] { header "__algorithm/unique.h" }
-module std_private_algorithm_unique_copy                                 [system] { header "__algorithm/unique_copy.h" }
-module std_private_algorithm_unwrap_iter                                 [system] {
+module cxx03_std_private_algorithm_three_way_comp_ref_type                     [system] { header "__algorithm/three_way_comp_ref_type.h" }
+module cxx03_std_private_algorithm_transform                                   [system] { header "__algorithm/transform.h" }
+module cxx03_std_private_algorithm_uniform_random_bit_generator_adaptor        [system] { header "__algorithm/uniform_random_bit_generator_adaptor.h" }
+module cxx03_std_private_algorithm_unique                                      [system] { header "__algorithm/unique.h" }
+module cxx03_std_private_algorithm_unique_copy                                 [system] { header "__algorithm/unique_copy.h" }
+module cxx03_std_private_algorithm_unwrap_iter                                 [system] {
   header "__algorithm/unwrap_iter.h"
   export std_private_iterator_iterator_traits
 }
-module std_private_algorithm_unwrap_range                                [system] {
+module cxx03_std_private_algorithm_unwrap_range                                [system] {
   header "__algorithm/unwrap_range.h"
   export std_private_utility_pair
 }
-module std_private_algorithm_upper_bound                                 [system] { header "__algorithm/upper_bound.h" }
+module cxx03_std_private_algorithm_upper_bound                                 [system] { header "__algorithm/upper_bound.h" }
 
-module std_private_array_array_fwd [system] { header "__fwd/array.h" }
+module cxx03_std_private_array_array_fwd [system] { header "__fwd/array.h" }
 
-module std_private_atomic_aliases             [system] {
+module cxx03_std_private_atomic_aliases             [system] {
   header "__atomic/aliases.h"
   export std_private_atomic_atomic
 }
-module std_private_atomic_atomic              [system] {
+module cxx03_std_private_atomic_atomic              [system] {
   header "__atomic/atomic.h"
   export std_private_atomic_atomic_base
 }
-module std_private_atomic_atomic_base         [system] { header "__atomic/atomic_base.h" }
-module std_private_atomic_atomic_flag         [system] {
+module cxx03_std_private_atomic_atomic_base         [system] { header "__atomic/atomic_base.h" }
+module cxx03_std_private_atomic_atomic_flag         [system] {
   header "__atomic/atomic_flag.h"
   export *
 }
-module std_private_atomic_atomic_init         [system] { header "__atomic/atomic_init.h" }
-module std_private_atomic_atomic_lock_free    [system] { header "__atomic/atomic_lock_free.h" }
-module std_private_atomic_atomic_ref          [system] { header "__atomic/atomic_ref.h" }
-module std_private_atomic_atomic_sync         [system] {
+module cxx03_std_private_atomic_atomic_init         [system] { header "__atomic/atomic_init.h" }
+module cxx03_std_private_atomic_atomic_lock_free    [system] { header "__atomic/atomic_lock_free.h" }
+module cxx03_std_private_atomic_atomic_ref          [system] { header "__atomic/atomic_ref.h" }
+module cxx03_std_private_atomic_atomic_sync         [system] {
   header "__atomic/atomic_sync.h"
   export std_private_atomic_to_gcc_order
 }
-module std_private_atomic_check_memory_order  [system] { header "__atomic/check_memory_order.h" }
-module std_private_atomic_contention_t        [system] { header "__atomic/contention_t.h" }
-module std_private_atomic_cxx_atomic_impl     [system] { header "__atomic/cxx_atomic_impl.h" }
-module std_private_atomic_fence               [system] { header "__atomic/fence.h" }
-module std_private_atomic_is_always_lock_free [system] { header "__atomic/is_always_lock_free.h" }
-module std_private_atomic_kill_dependency     [system] { header "__atomic/kill_dependency.h" }
-module std_private_atomic_memory_order        [system] { header "__atomic/memory_order.h" }
-module std_private_atomic_to_gcc_order        [system] {
+module cxx03_std_private_atomic_check_memory_order  [system] { header "__atomic/check_memory_order.h" }
+module cxx03_std_private_atomic_contention_t        [system] { header "__atomic/contention_t.h" }
+module cxx03_std_private_atomic_cxx_atomic_impl     [system] { header "__atomic/cxx_atomic_impl.h" }
+module cxx03_std_private_atomic_fence               [system] { header "__atomic/fence.h" }
+module cxx03_std_private_atomic_is_always_lock_free [system] { header "__atomic/is_always_lock_free.h" }
+module cxx03_std_private_atomic_kill_dependency     [system] { header "__atomic/kill_dependency.h" }
+module cxx03_std_private_atomic_memory_order        [system] { header "__atomic/memory_order.h" }
+module cxx03_std_private_atomic_to_gcc_order        [system] {
   header "__atomic/to_gcc_order.h"
   export std_private_atomic_memory_order
 }
 
-module std_private_bit_bit_cast       [system] { header "__bit/bit_cast.h" }
-module std_private_bit_bit_ceil       [system] { header "__bit/bit_ceil.h" }
-module std_private_bit_bit_floor      [system] { header "__bit/bit_floor.h" }
-module std_private_bit_bit_log2       [system] { header "__bit/bit_log2.h" }
-module std_private_bit_bit_width      [system] { header "__bit/bit_width.h" }
-module std_private_bit_blsr           [system] { header "__bit/blsr.h" }
-module std_private_bit_byteswap       [system] { header "__bit/byteswap.h" }
-module std_private_bit_countl         [system] { header "__bit/countl.h" }
-module std_private_bit_countr         [system] { header "__bit/countr.h" }
-module std_private_bit_endian         [system] { header "__bit/endian.h" }
-module std_private_bit_has_single_bit [system] { header "__bit/has_single_bit.h" }
-module std_private_bit_invert_if      [system] { header "__bit/invert_if.h" }
-module std_private_bit_popcount       [system] { header "__bit/popcount.h" }
-module std_private_bit_rotate         [system] { header "__bit/rotate.h" }
+module cxx03_std_private_bit_bit_cast       [system] { header "__bit/bit_cast.h" }
+module cxx03_std_private_bit_bit_ceil       [system] { header "__bit/bit_ceil.h" }
+module cxx03_std_private_bit_bit_floor      [system] { header "__bit/bit_floor.h" }
+module cxx03_std_private_bit_bit_log2       [system] { header "__bit/bit_log2.h" }
+module cxx03_std_private_bit_bit_width      [system] { header "__bit/bit_width.h" }
+module cxx03_std_private_bit_blsr           [system] { header "__bit/blsr.h" }
+module cxx03_std_private_bit_byteswap       [system] { header "__bit/byteswap.h" }
+module cxx03_std_private_bit_countl         [system] { header "__bit/countl.h" }
+module cxx03_std_private_bit_countr         [system] { header "__bit/countr.h" }
+module cxx03_std_private_bit_endian         [system] { header "__bit/endian.h" }
+module cxx03_std_private_bit_has_single_bit [system] { header "__bit/has_single_bit.h" }
+module cxx03_std_private_bit_invert_if      [system] { header "__bit/invert_if.h" }
+module cxx03_std_private_bit_popcount       [system] { header "__bit/popcount.h" }
+module cxx03_std_private_bit_rotate         [system] { header "__bit/rotate.h" }
 
-module std_private_charconv_chars_format            [system] { header "__charconv/chars_format.h" }
-module std_private_charconv_from_chars_integral     [system] { header "__charconv/from_chars_integral.h" }
-module std_private_charconv_from_chars_result       [system] { header "__charconv/from_chars_result.h" }
-module std_private_charconv_tables                  [system] { header "__charconv/tables.h" }
-module std_private_charconv_to_chars                [system] { header "__charconv/to_chars.h" }
-module std_private_charconv_to_chars_base_10        [system] { header "__charconv/to_chars_base_10.h" }
-module std_private_charconv_to_chars_floating_point [system] { header "__charconv/to_chars_floating_point.h" }
-module std_private_charconv_to_chars_integral       [system] {
+module cxx03_std_private_charconv_chars_format            [system] { header "__charconv/chars_format.h" }
+module cxx03_std_private_charconv_from_chars_integral     [system] { header "__charconv/from_chars_integral.h" }
+module cxx03_std_private_charconv_from_chars_result       [system] { header "__charconv/from_chars_result.h" }
+module cxx03_std_private_charconv_tables                  [system] { header "__charconv/tables.h" }
+module cxx03_std_private_charconv_to_chars                [system] { header "__charconv/to_chars.h" }
+module cxx03_std_private_charconv_to_chars_base_10        [system] { header "__charconv/to_chars_base_10.h" }
+module cxx03_std_private_charconv_to_chars_floating_point [system] { header "__charconv/to_chars_floating_point.h" }
+module cxx03_std_private_charconv_to_chars_integral       [system] {
   header "__charconv/to_chars_integral.h"
   export std_private_charconv_traits
 }
-module std_private_charconv_to_chars_result         [system] {
+module cxx03_std_private_charconv_to_chars_result         [system] {
   header "__charconv/to_chars_result.h"
   export *
 }
-module std_private_charconv_traits                  [system] { header "__charconv/traits.h" }
+module cxx03_std_private_charconv_traits                  [system] { header "__charconv/traits.h" }
 
-module std_private_chrono_calendar               [system] { header "__chrono/calendar.h" }
-module std_private_chrono_concepts               [system] { header "__chrono/concepts.h" }
-module std_private_chrono_convert_to_timespec    [system] { header "__chrono/convert_to_timespec.h" }
-module std_private_chrono_convert_to_tm          [system] { header "__chrono/convert_to_tm.h" }
-module std_private_chrono_day                    [system] { header "__chrono/day.h" }
-module std_private_chrono_duration               [system] {
+module cxx03_std_private_chrono_calendar               [system] { header "__chrono/calendar.h" }
+module cxx03_std_private_chrono_concepts               [system] { header "__chrono/concepts.h" }
+module cxx03_std_private_chrono_convert_to_timespec    [system] { header "__chrono/convert_to_timespec.h" }
+module cxx03_std_private_chrono_convert_to_tm          [system] { header "__chrono/convert_to_tm.h" }
+module cxx03_std_private_chrono_day                    [system] { header "__chrono/day.h" }
+module cxx03_std_private_chrono_duration               [system] {
   header "__chrono/duration.h"
   export std_private_type_traits_is_convertible
 }
-module std_private_chrono_exception              [system] { header "__chrono/exception.h" }
-module std_private_chrono_file_clock             [system] { header "__chrono/file_clock.h" }
-module std_private_chrono_formatter              [system] {
+module cxx03_std_private_chrono_exception              [system] { header "__chrono/exception.h" }
+module cxx03_std_private_chrono_file_clock             [system] { header "__chrono/file_clock.h" }
+module cxx03_std_private_chrono_formatter              [system] {
   header "__chrono/formatter.h"
 }
-module std_private_chrono_hh_mm_ss               [system] { header "__chrono/hh_mm_ss.h" }
-module std_private_chrono_high_resolution_clock  [system] {
+module cxx03_std_private_chrono_hh_mm_ss               [system] { header "__chrono/hh_mm_ss.h" }
+module cxx03_std_private_chrono_high_resolution_clock  [system] {
   header "__chrono/high_resolution_clock.h"
   export std_private_chrono_steady_clock
   export std_private_chrono_system_clock
 }
-module std_private_chrono_leap_second            [system] { header "__chrono/leap_second.h" }
-module std_private_chrono_literals               [system] { header "__chrono/literals.h" }
-module std_private_chrono_local_info             [system] {
+module cxx03_std_private_chrono_leap_second            [system] { header "__chrono/leap_second.h" }
+module cxx03_std_private_chrono_literals               [system] { header "__chrono/literals.h" }
+module cxx03_std_private_chrono_local_info             [system] {
   header "__chrono/local_info.h"
   export std_private_chrono_sys_info
 }
-module std_private_chrono_month                  [system] { header "__chrono/month.h" }
-module std_private_chrono_month_weekday          [system] { header "__chrono/month_weekday.h" }
-module std_private_chrono_monthday               [system] { header "__chrono/monthday.h" }
-module std_private_chrono_ostream                [system] {
+module cxx03_std_private_chrono_month                  [system] { header "__chrono/month.h" }
+module cxx03_std_private_chrono_month_weekday          [system] { header "__chrono/month_weekday.h" }
+module cxx03_std_private_chrono_monthday               [system] { header "__chrono/monthday.h" }
+module cxx03_std_private_chrono_ostream                [system] {
   header "__chrono/ostream.h"
 }
-module std_private_chrono_parser_std_format_spec [system] {
+module cxx03_std_private_chrono_parser_std_format_spec [system] {
   header "__chrono/parser_std_format_spec.h"
 }
-module std_private_chrono_statically_widen       [system] { header "__chrono/statically_widen.h" }
-module std_private_chrono_steady_clock           [system] {
+module cxx03_std_private_chrono_statically_widen       [system] { header "__chrono/statically_widen.h" }
+module cxx03_std_private_chrono_steady_clock           [system] {
   header "__chrono/steady_clock.h"
   export std_private_chrono_time_point
 }
-module std_private_chrono_time_zone              [system] {
+module cxx03_std_private_chrono_time_zone              [system] {
   header "__chrono/time_zone.h"
   export std_private_memory_unique_ptr
 }
-module std_private_chrono_time_zone_link         [system] {
+module cxx03_std_private_chrono_time_zone_link         [system] {
   header "__chrono/time_zone_link.h"
 }
-module std_private_chrono_sys_info               [system] {
+module cxx03_std_private_chrono_sys_info               [system] {
   header "__chrono/sys_info.h"
 }
-module std_private_chrono_system_clock           [system] {
+module cxx03_std_private_chrono_system_clock           [system] {
   header "__chrono/system_clock.h"
   export std_private_chrono_time_point
 }
-module std_private_chrono_tzdb                   [system] {
+module cxx03_std_private_chrono_tzdb                   [system] {
   header "__chrono/tzdb.h"
   export *
 }
-module std_private_chrono_tzdb_list              [system] {
+module cxx03_std_private_chrono_tzdb_list              [system] {
   header "__chrono/tzdb_list.h"
   export *
 }
-module std_private_chrono_time_point             [system] { header "__chrono/time_point.h" }
-module std_private_chrono_weekday                [system] { header "__chrono/weekday.h" }
-module std_private_chrono_year                   [system] { header "__chrono/year.h" }
-module std_private_chrono_year_month             [system] { header "__chrono/year_month.h" }
-module std_private_chrono_year_month_day         [system] { header "__chrono/year_month_day.h" }
-module std_private_chrono_year_month_weekday     [system] { header "__chrono/year_month_weekday.h" }
-module std_private_chrono_zoned_time             [system] { header "__chrono/zoned_time.h" }
+module cxx03_std_private_chrono_time_point             [system] { header "__chrono/time_point.h" }
+module cxx03_std_private_chrono_weekday                [system] { header "__chrono/weekday.h" }
+module cxx03_std_private_chrono_year                   [system] { header "__chrono/year.h" }
+module cxx03_std_private_chrono_year_month             [system] { header "__chrono/year_month.h" }
+module cxx03_std_private_chrono_year_month_day         [system] { header "__chrono/year_month_day.h" }
+module cxx03_std_private_chrono_year_month_weekday     [system] { header "__chrono/year_month_weekday.h" }
+module cxx03_std_private_chrono_zoned_time             [system] { header "__chrono/zoned_time.h" }
 
-module std_private_compare_common_comparison_category     [system] { header "__compare/common_comparison_category.h" }
-module std_private_compare_compare_partial_order_fallback [system] { header "__compare/compare_partial_order_fallback.h" }
-module std_private_compare_compare_strong_order_fallback  [system] { header "__compare/compare_strong_order_fallback.h" }
-module std_private_compare_compare_three_way              [system] { header "__compare/compare_three_way.h" }
-module std_private_compare_compare_three_way_result       [system] { header "__compare/compare_three_way_result.h" }
-module std_private_compare_compare_weak_order_fallback    [system] { header "__compare/compare_weak_order_fallback.h" }
-module std_private_compare_is_eq                          [system] { header "__compare/is_eq.h" }
-module std_private_compare_ordering                       [system] { header "__compare/ordering.h" }
-module std_private_compare_partial_order                  [system] { header "__compare/partial_order.h" }
-module std_private_compare_strong_order                   [system] { header "__compare/strong_order.h" }
-module std_private_compare_synth_three_way                [system] { header "__compare/synth_three_way.h" }
-module std_private_compare_three_way_comparable           [system] { header "__compare/three_way_comparable.h" }
-module std_private_compare_weak_order                     [system] { header "__compare/weak_order.h" }
+module cxx03_std_private_compare_common_comparison_category     [system] { header "__compare/common_comparison_category.h" }
+module cxx03_std_private_compare_compare_partial_order_fallback [system] { header "__compare/compare_partial_order_fallback.h" }
+module cxx03_std_private_compare_compare_strong_order_fallback  [system] { header "__compare/compare_strong_order_fallback.h" }
+module cxx03_std_private_compare_compare_three_way              [system] { header "__compare/compare_three_way.h" }
+module cxx03_std_private_compare_compare_three_way_result       [system] { header "__compare/compare_three_way_result.h" }
+module cxx03_std_private_compare_compare_weak_order_fallback    [system] { header "__compare/compare_weak_order_fallback.h" }
+module cxx03_std_private_compare_is_eq                          [system] { header "__compare/is_eq.h" }
+module cxx03_std_private_compare_ordering                       [system] { header "__compare/ordering.h" }
+module cxx03_std_private_compare_partial_order                  [system] { header "__compare/partial_order.h" }
+module cxx03_std_private_compare_strong_order                   [system] { header "__compare/strong_order.h" }
+module cxx03_std_private_compare_synth_three_way                [system] { header "__compare/synth_three_way.h" }
+module cxx03_std_private_compare_three_way_comparable           [system] { header "__compare/three_way_comparable.h" }
+module cxx03_std_private_compare_weak_order                     [system] { header "__compare/weak_order.h" }
 
-module std_private_complex_complex_fwd            [system] { header "__fwd/complex.h" }
+module cxx03_std_private_complex_complex_fwd            [system] { header "__fwd/complex.h" }
 
-module std_private_concepts_arithmetic            [system] { header "__concepts/arithmetic.h" }
-module std_private_concepts_assignable            [system] { header "__concepts/assignable.h" }
-module std_private_concepts_boolean_testable      [system] { header "__concepts/boolean_testable.h" }
-module std_private_concepts_class_or_enum         [system] { header "__concepts/class_or_enum.h" }
-module std_private_concepts_common_reference_with [system] { header "__concepts/common_reference_with.h" }
-module std_private_concepts_common_with           [system] { header "__concepts/common_with.h" }
-module std_private_concepts_constructible         [system] {
+module cxx03_std_private_concepts_arithmetic            [system] { header "__concepts/arithmetic.h" }
+module cxx03_std_private_concepts_assignable            [system] { header "__concepts/assignable.h" }
+module cxx03_std_private_concepts_boolean_testable      [system] { header "__concepts/boolean_testable.h" }
+module cxx03_std_private_concepts_class_or_enum         [system] { header "__concepts/class_or_enum.h" }
+module cxx03_std_private_concepts_common_reference_with [system] { header "__concepts/common_reference_with.h" }
+module cxx03_std_private_concepts_common_with           [system] { header "__concepts/common_with.h" }
+module cxx03_std_private_concepts_constructible         [system] {
   header "__concepts/constructible.h"
   export std_private_concepts_destructible
 }
-module std_private_concepts_convertible_to        [system] { header "__concepts/convertible_to.h" }
-module std_private_concepts_copyable              [system] { header "__concepts/copyable.h" }
-module std_private_concepts_derived_from          [system] { header "__concepts/derived_from.h" }
-module std_private_concepts_destructible          [system] {
+module cxx03_std_private_concepts_convertible_to        [system] { header "__concepts/convertible_to.h" }
+module cxx03_std_private_concepts_copyable              [system] { header "__concepts/copyable.h" }
+module cxx03_std_private_concepts_derived_from          [system] { header "__concepts/derived_from.h" }
+module cxx03_std_private_concepts_destructible          [system] {
   header "__concepts/destructible.h"
   export std_private_type_traits_is_nothrow_destructible
 }
-module std_private_concepts_different_from        [system] { header "__concepts/different_from.h" }
-module std_private_concepts_equality_comparable   [system] {
+module cxx03_std_private_concepts_different_from        [system] { header "__concepts/different_from.h" }
+module cxx03_std_private_concepts_equality_comparable   [system] {
   header "__concepts/equality_comparable.h"
   export std_private_type_traits_common_reference
 }
-module std_private_concepts_invocable             [system] { header "__concepts/invocable.h" }
-module std_private_concepts_movable               [system] {
+module cxx03_std_private_concepts_invocable             [system] { header "__concepts/invocable.h" }
+module cxx03_std_private_concepts_movable               [system] {
   header "__concepts/movable.h"
   export std_private_type_traits_is_object
 }
-module std_private_concepts_predicate             [system] { header "__concepts/predicate.h" }
-module std_private_concepts_regular               [system] { header "__concepts/regular.h" }
-module std_private_concepts_relation              [system] { header "__concepts/relation.h" }
-module std_private_concepts_same_as               [system] {
+module cxx03_std_private_concepts_predicate             [system] { header "__concepts/predicate.h" }
+module cxx03_std_private_concepts_regular               [system] { header "__concepts/regular.h" }
+module cxx03_std_private_concepts_relation              [system] { header "__concepts/relation.h" }
+module cxx03_std_private_concepts_same_as               [system] {
   header "__concepts/same_as.h"
   export std_private_type_traits_is_same
 }
-module std_private_concepts_semiregular           [system] { header "__concepts/semiregular.h" }
-module std_private_concepts_swappable             [system] { header "__concepts/swappable.h" }
-module std_private_concepts_totally_ordered       [system] { header "__concepts/totally_ordered.h" }
+module cxx03_std_private_concepts_semiregular           [system] { header "__concepts/semiregular.h" }
+module cxx03_std_private_concepts_swappable             [system] { header "__concepts/swappable.h" }
+module cxx03_std_private_concepts_totally_ordered       [system] { header "__concepts/totally_ordered.h" }
 
-module std_private_condition_variable_condition_variable [system] {
+module cxx03_std_private_condition_variable_condition_variable [system] {
   header "__condition_variable/condition_variable.h"
   export *
 }
 
-module std_private_coroutine_coroutine_handle      [system] { header "__coroutine/coroutine_handle.h" }
-module std_private_coroutine_coroutine_traits      [system] { header "__coroutine/coroutine_traits.h" }
-module std_private_coroutine_noop_coroutine_handle [system] { header "__coroutine/noop_coroutine_handle.h" }
-module std_private_coroutine_trivial_awaitables    [system] { header "__coroutine/trivial_awaitables.h" }
+module cxx03_std_private_coroutine_coroutine_handle      [system] { header "__coroutine/coroutine_handle.h" }
+module cxx03_std_private_coroutine_coroutine_traits      [system] { header "__coroutine/coroutine_traits.h" }
+module cxx03_std_private_coroutine_noop_coroutine_handle [system] { header "__coroutine/noop_coroutine_handle.h" }
+module cxx03_std_private_coroutine_trivial_awaitables    [system] { header "__coroutine/trivial_awaitables.h" }
 
-module std_private_debug_utils_randomize_range            [system] { header "__debug_utils/randomize_range.h" }
-module std_private_debug_utils_sanitizers                 [system] { header "__debug_utils/sanitizers.h" }
-module std_private_debug_utils_strict_weak_ordering_check [system] {
+module cxx03_std_private_debug_utils_randomize_range            [system] { header "__debug_utils/randomize_range.h" }
+module cxx03_std_private_debug_utils_sanitizers                 [system] { header "__debug_utils/sanitizers.h" }
+module cxx03_std_private_debug_utils_strict_weak_ordering_check [system] {
   header "__debug_utils/strict_weak_ordering_check.h"
   export std_private_type_traits_is_constant_evaluated
 }
 
-module std_private_deque_fwd [system] { header "__fwd/deque.h" }
+module cxx03_std_private_deque_fwd [system] { header "__fwd/deque.h" }
 
-module std_private_exception_exception        [system] { header "__exception/exception.h" }
-module std_private_exception_exception_ptr    [system] {
+module cxx03_std_private_exception_exception        [system] { header "__exception/exception.h" }
+module cxx03_std_private_exception_exception_ptr    [system] {
   header "__exception/exception_ptr.h"
   export std_private_exception_operations
 }
-module std_private_exception_nested_exception [system] { header "__exception/nested_exception.h" }
-module std_private_exception_operations       [system] { header "__exception/operations.h" }
-module std_private_exception_terminate        [system] { header "__exception/terminate.h" }
+module cxx03_std_private_exception_nested_exception [system] { header "__exception/nested_exception.h" }
+module cxx03_std_private_exception_operations       [system] { header "__exception/operations.h" }
+module cxx03_std_private_exception_terminate        [system] { header "__exception/terminate.h" }
 
-module std_private_expected_bad_expected_access [system] { header "__expected/bad_expected_access.h" }
-module std_private_expected_expected            [system] { header "__expected/expected.h" }
-module std_private_expected_unexpect            [system] { header "__expected/unexpect.h" }
-module std_private_expected_unexpected          [system] { header "__expected/unexpected.h" }
+module cxx03_std_private_expected_bad_expected_access [system] { header "__expected/bad_expected_access.h" }
+module cxx03_std_private_expected_expected            [system] { header "__expected/expected.h" }
+module cxx03_std_private_expected_unexpect            [system] { header "__expected/unexpect.h" }
+module cxx03_std_private_expected_unexpected          [system] { header "__expected/unexpected.h" }
 
-module std_private_filesystem_copy_options                 [system] { header "__filesystem/copy_options.h" }
-module std_private_filesystem_directory_entry              [system] {
+module cxx03_std_private_filesystem_copy_options                 [system] { header "__filesystem/copy_options.h" }
+module cxx03_std_private_filesystem_directory_entry              [system] {
   header "__filesystem/directory_entry.h"
   export *
 }
-module std_private_filesystem_directory_iterator           [system] {
+module cxx03_std_private_filesystem_directory_iterator           [system] {
   header "__filesystem/directory_iterator.h"
   export *
 }
-module std_private_filesystem_directory_options            [system] { header "__filesystem/directory_options.h" }
-module std_private_filesystem_file_status                  [system] { header "__filesystem/file_status.h" }
-module std_private_filesystem_file_time_type               [system] { header "__filesystem/file_time_type.h" }
-module std_private_filesystem_file_type                    [system] { header "__filesystem/file_type.h" }
-module std_private_filesystem_filesystem_error             [system] {
+module cxx03_std_private_filesystem_directory_options            [system] { header "__filesystem/directory_options.h" }
+module cxx03_std_private_filesystem_file_status                  [system] { header "__filesystem/file_status.h" }
+module cxx03_std_private_filesystem_file_time_type               [system] { header "__filesystem/file_time_type.h" }
+module cxx03_std_private_filesystem_file_type                    [system] { header "__filesystem/file_type.h" }
+module cxx03_std_private_filesystem_filesystem_error             [system] {
   header "__filesystem/filesystem_error.h"
   export *
 }
-module std_private_filesystem_operations                   [system] { header "__filesystem/operations.h" }
-module std_private_filesystem_path                         [system] {
+module cxx03_std_private_filesystem_operations                   [system] { header "__filesystem/operations.h" }
+module cxx03_std_private_filesystem_path                         [system] {
   header "__filesystem/path.h"
   export *
 }
-module std_private_filesystem_path_iterator                [system] { header "__filesystem/path_iterator.h" }
-module std_private_filesystem_perm_options                 [system] { header "__filesystem/perm_options.h" }
-module std_private_filesystem_perms                        [system] { header "__filesystem/perms.h" }
-module std_private_filesystem_recursive_directory_iterator [system] {
+module cxx03_std_private_filesystem_path_iterator                [system] { header "__filesystem/path_iterator.h" }
+module cxx03_std_private_filesystem_perm_options                 [system] { header "__filesystem/perm_options.h" }
+module cxx03_std_private_filesystem_perms                        [system] { header "__filesystem/perms.h" }
+module cxx03_std_private_filesystem_recursive_directory_iterator [system] {
   header "__filesystem/recursive_directory_iterator.h"
   export *
 }
-module std_private_filesystem_space_info                   [system] { header "__filesystem/space_info.h" }
-module std_private_filesystem_u8path                       [system] { header "__filesystem/u8path.h" }
+module cxx03_std_private_filesystem_space_info                   [system] { header "__filesystem/space_info.h" }
+module cxx03_std_private_filesystem_u8path                       [system] { header "__filesystem/u8path.h" }
 
-module std_private_format_buffer                          [system] { header "__format/buffer.h" }
-module std_private_format_concepts                        [system] { header "__format/concepts.h" }
-module std_private_format_container_adaptor               [system] { header "__format/container_adaptor.h" }
-module std_private_format_enable_insertable               [system] { header "__format/enable_insertable.h" }
-module std_private_format_escaped_output_table            [system] { header "__format/escaped_output_table.h" }
-module std_private_format_extended_grapheme_cluster_table [system] { header "__format/extended_grapheme_cluster_table.h" }
-module std_private_format_format_arg                      [system] { header "__format/format_arg.h" }
-module std_private_format_format_arg_store                [system] { header "__format/format_arg_store.h" }
-module std_private_format_format_args                     [system] { header "__format/format_args.h" }
-module std_private_format_format_context                  [system] {
+module cxx03_std_private_format_buffer                          [system] { header "__format/buffer.h" }
+module cxx03_std_private_format_concepts                        [system] { header "__format/concepts.h" }
+module cxx03_std_private_format_container_adaptor               [system] { header "__format/container_adaptor.h" }
+module cxx03_std_private_format_enable_insertable               [system] { header "__format/enable_insertable.h" }
+module cxx03_std_private_format_escaped_output_table            [system] { header "__format/escaped_output_table.h" }
+module cxx03_std_private_format_extended_grapheme_cluster_table [system] { header "__format/extended_grapheme_cluster_table.h" }
+module cxx03_std_private_format_format_arg                      [system] { header "__format/format_arg.h" }
+module cxx03_std_private_format_format_arg_store                [system] { header "__format/format_arg_store.h" }
+module cxx03_std_private_format_format_args                     [system] { header "__format/format_args.h" }
+module cxx03_std_private_format_format_context                  [system] {
   header "__format/format_context.h"
   export *
 }
-module std_private_format_format_error                    [system] { header "__format/format_error.h" }
-module std_private_format_format_functions                [system] {
+module cxx03_std_private_format_format_error                    [system] { header "__format/format_error.h" }
+module cxx03_std_private_format_format_functions                [system] {
   header "__format/format_functions.h"
   export std_string
 }
-module std_private_format_fwd                             [system] { header "__fwd/format.h" }
-module std_private_format_format_parse_context            [system] { header "__format/format_parse_context.h" }
-module std_private_format_format_string                   [system] { header "__format/format_string.h" }
-module std_private_format_format_to_n_result              [system] {
+module cxx03_std_private_format_fwd                             [system] { header "__fwd/format.h" }
+module cxx03_std_private_format_format_parse_context            [system] { header "__format/format_parse_context.h" }
+module cxx03_std_private_format_format_string                   [system] { header "__format/format_string.h" }
+module cxx03_std_private_format_format_to_n_result              [system] {
   header "__format/format_to_n_result.h"
   export std_private_iterator_incrementable_traits
 }
-module std_private_format_formatter                       [system] { header "__format/formatter.h" }
-module std_private_format_formatter_bool                  [system] { header "__format/formatter_bool.h" }
-module std_private_format_formatter_char                  [system] { header "__format/formatter_char.h" }
-module std_private_format_formatter_floating_point        [system] { header "__format/formatter_floating_point.h" }
-module std_private_format_formatter_integer               [system] { header "__format/formatter_integer.h" }
-module std_private_format_formatter_integral              [system] { header "__format/formatter_integral.h" }
-module std_private_format_formatter_output                [system] { header "__format/formatter_output.h" }
-module std_private_format_formatter_pointer               [system] { header "__format/formatter_pointer.h" }
-module std_private_format_formatter_string                [system] { header "__format/formatter_string.h" }
-module std_private_format_formatter_tuple                 [system] { header "__format/formatter_tuple.h" }
-module std_private_format_indic_conjunct_break_table      [system] { header "__format/indic_conjunct_break_table.h" }
-module std_private_format_parser_std_format_spec          [system] { header "__format/parser_std_format_spec.h" }
-module std_private_format_range_default_formatter         [system] { header "__format/range_default_formatter.h" }
-module std_private_format_range_formatter                 [system] { header "__format/range_formatter.h" }
-module std_private_format_unicode                         [system] {
+module cxx03_std_private_format_formatter                       [system] { header "__format/formatter.h" }
+module cxx03_std_private_format_formatter_bool                  [system] { header "__format/formatter_bool.h" }
+module cxx03_std_private_format_formatter_char                  [system] { header "__format/formatter_char.h" }
+module cxx03_std_private_format_formatter_floating_point        [system] { header "__format/formatter_floating_point.h" }
+module cxx03_std_private_format_formatter_integer               [system] { header "__format/formatter_integer.h" }
+module cxx03_std_private_format_formatter_integral              [system] { header "__format/formatter_integral.h" }
+module cxx03_std_private_format_formatter_output                [system] { header "__format/formatter_output.h" }
+module cxx03_std_private_format_formatter_pointer               [system] { header "__format/formatter_pointer.h" }
+module cxx03_std_private_format_formatter_string                [system] { header "__format/formatter_string.h" }
+module cxx03_std_private_format_formatter_tuple                 [system] { header "__format/formatter_tuple.h" }
+module cxx03_std_private_format_indic_conjunct_break_table      [system] { header "__format/indic_conjunct_break_table.h" }
+module cxx03_std_private_format_parser_std_format_spec          [system] { header "__format/parser_std_format_spec.h" }
+module cxx03_std_private_format_range_default_formatter         [system] { header "__format/range_default_formatter.h" }
+module cxx03_std_private_format_range_formatter                 [system] { header "__format/range_formatter.h" }
+module cxx03_std_private_format_unicode                         [system] {
   header "__format/unicode.h"
   export std_private_format_extended_grapheme_cluster_table
   export std_private_format_indic_conjunct_break_table
 }
-module std_private_format_width_estimation_table          [system] { header "__format/width_estimation_table.h" }
-module std_private_format_write_escaped                   [system] { header "__format/write_escaped.h" }
+module cxx03_std_private_format_width_estimation_table          [system] { header "__format/width_estimation_table.h" }
+module cxx03_std_private_format_write_escaped                   [system] { header "__format/write_escaped.h" }
 
-module std_private_functional_binary_function            [system] { header "__functional/binary_function.h" }
-module std_private_functional_binary_negate              [system] { header "__functional/binary_negate.h" }
-module std_private_functional_bind                       [system] { header "__functional/bind.h" }
-module std_private_functional_bind_back                  [system] { header "__functional/bind_back.h" }
-module std_private_functional_bind_front                 [system] { header "__functional/bind_front.h" }
-module std_private_functional_binder1st                  [system] { header "__functional/binder1st.h" }
-module std_private_functional_binder2nd                  [system] { header "__functional/binder2nd.h" }
-module std_private_functional_boyer_moore_searcher       [system] {
+module cxx03_std_private_functional_binary_function            [system] { header "__functional/binary_function.h" }
+module cxx03_std_private_functional_binary_negate              [system] { header "__functional/binary_negate.h" }
+module cxx03_std_private_functional_bind                       [system] { header "__functional/bind.h" }
+module cxx03_std_private_functional_bind_back                  [system] { header "__functional/bind_back.h" }
+module cxx03_std_private_functional_bind_front                 [system] { header "__functional/bind_front.h" }
+module cxx03_std_private_functional_binder1st                  [system] { header "__functional/binder1st.h" }
+module cxx03_std_private_functional_binder2nd                  [system] { header "__functional/binder2nd.h" }
+module cxx03_std_private_functional_boyer_moore_searcher       [system] {
   header "__functional/boyer_moore_searcher.h"
   export std_private_memory_shared_ptr
 }
-module std_private_functional_compose                    [system] {
+module cxx03_std_private_functional_compose                    [system] {
   header "__functional/compose.h"
   export std_private_functional_perfect_forward
 }
-module std_private_functional_default_searcher           [system] { header "__functional/default_searcher.h" }
-module std_private_functional_function                   [system] { header "__functional/function.h" }
-module std_private_functional_hash                       [system] {
+module cxx03_std_private_functional_default_searcher           [system] { header "__functional/default_searcher.h" }
+module cxx03_std_private_functional_function                   [system] { header "__functional/function.h" }
+module cxx03_std_private_functional_hash                       [system] {
   header "__functional/hash.h"
   export std_cstdint
   export std_private_type_traits_underlying_type
   export std_private_utility_pair
 }
-module std_private_functional_fwd                        [system] { header "__fwd/functional.h" }
-module std_private_functional_identity                   [system] { header "__functional/identity.h" }
-module std_private_functional_invoke                     [system] {
+module cxx03_std_private_functional_fwd                        [system] { header "__fwd/functional.h" }
+module cxx03_std_private_functional_identity                   [system] { header "__functional/identity.h" }
+module cxx03_std_private_functional_invoke                     [system] {
   header "__functional/invoke.h"
   export *
 }
-module std_private_functional_is_transparent             [system] { header "__functional/is_transparent.h" }
-module std_private_functional_mem_fn                     [system] { header "__functional/mem_fn.h" }
-module std_private_functional_mem_fun_ref                [system] { header "__functional/mem_fun_ref.h" }
-module std_private_functional_not_fn                     [system] {
+module cxx03_std_private_functional_is_transparent             [system] { header "__functional/is_transparent.h" }
+module cxx03_std_private_functional_mem_fn                     [system] { header "__functional/mem_fn.h" }
+module cxx03_std_private_functional_mem_fun_ref                [system] { header "__functional/mem_fun_ref.h" }
+module cxx03_std_private_functional_not_fn                     [system] {
   header "__functional/not_fn.h"
   export std_private_functional_perfect_forward
 }
-module std_private_functional_operations                 [system] { header "__functional/operations.h" }
-module std_private_functional_perfect_forward            [system] {
+module cxx03_std_private_functional_operations                 [system] { header "__functional/operations.h" }
+module cxx03_std_private_functional_perfect_forward            [system] {
   header "__functional/perfect_forward.h"
   export *
 }
-module std_private_functional_pointer_to_binary_function [system] { header "__functional/pointer_to_binary_function.h" }
-module std_private_functional_pointer_to_unary_function  [system] { header "__functional/pointer_to_unary_function.h" }
-module std_private_functional_ranges_operations          [system] { header "__functional/ranges_operations.h" }
-module std_private_functional_reference_wrapper          [system] { header "__functional/reference_wrapper.h" }
-module std_private_functional_unary_function             [system] { header "__functional/unary_function.h" }
-module std_private_functional_unary_negate               [system] { header "__functional/unary_negate.h" }
-module std_private_functional_weak_result_type           [system] { header "__functional/weak_result_type.h" }
+module cxx03_std_private_functional_pointer_to_binary_function [system] { header "__functional/pointer_to_binary_function.h" }
+module cxx03_std_private_functional_pointer_to_unary_function  [system] { header "__functional/pointer_to_unary_function.h" }
+module cxx03_std_private_functional_ranges_operations          [system] { header "__functional/ranges_operations.h" }
+module cxx03_std_private_functional_reference_wrapper          [system] { header "__functional/reference_wrapper.h" }
+module cxx03_std_private_functional_unary_function             [system] { header "__functional/unary_function.h" }
+module cxx03_std_private_functional_unary_negate               [system] { header "__functional/unary_negate.h" }
+module cxx03_std_private_functional_weak_result_type           [system] { header "__functional/weak_result_type.h" }
 
-module std_private_ios_fpos [system] { header "__ios/fpos.h" }
+module cxx03_std_private_ios_fpos [system] { header "__ios/fpos.h" }
 
-module std_private_iosfwd_fstream_fwd   [system] { header "__fwd/fstream.h" }
-module std_private_iosfwd_ios_fwd       [system] { header "__fwd/ios.h" }
-module std_private_iosfwd_istream_fwd   [system] { header "__fwd/istream.h" }
-module std_private_iosfwd_ostream_fwd   [system] { header "__fwd/ostream.h" }
-module std_private_iosfwd_sstream_fwd   [system] { header "__fwd/sstream.h" }
-module std_private_iosfwd_streambuf_fwd [system] { header "__fwd/streambuf.h" }
+module cxx03_std_private_iosfwd_fstream_fwd   [system] { header "__fwd/fstream.h" }
+module cxx03_std_private_iosfwd_ios_fwd       [system] { header "__fwd/ios.h" }
+module cxx03_std_private_iosfwd_istream_fwd   [system] { header "__fwd/istream.h" }
+module cxx03_std_private_iosfwd_ostream_fwd   [system] { header "__fwd/ostream.h" }
+module cxx03_std_private_iosfwd_sstream_fwd   [system] { header "__fwd/sstream.h" }
+module cxx03_std_private_iosfwd_streambuf_fwd [system] { header "__fwd/streambuf.h" }
 
-module std_private_iterator_access                  [system] { header "__iterator/access.h" }
-module std_private_iterator_advance                 [system] { header "__iterator/advance.h" }
-module std_private_iterator_aliasing_iterator       [system] { header "__iterator/aliasing_iterator.h" }
-module std_private_iterator_back_insert_iterator    [system] { header "__iterator/back_insert_iterator.h" }
-module std_private_iterator_bounded_iter            [system] { header "__iterator/bounded_iter.h" }
-module std_private_iterator_common_iterator         [system] { header "__iterator/common_iterator.h" }
-module std_private_iterator_concepts                [system] {
+module cxx03_std_private_iterator_access                  [system] { header "__iterator/access.h" }
+module cxx03_std_private_iterator_advance                 [system] { header "__iterator/advance.h" }
+module cxx03_std_private_iterator_aliasing_iterator       [system] { header "__iterator/aliasing_iterator.h" }
+module cxx03_std_private_iterator_back_insert_iterator    [system] { header "__iterator/back_insert_iterator.h" }
+module cxx03_std_private_iterator_bounded_iter            [system] { header "__iterator/bounded_iter.h" }
+module cxx03_std_private_iterator_common_iterator         [system] { header "__iterator/common_iterator.h" }
+module cxx03_std_private_iterator_concepts                [system] {
   header "__iterator/concepts.h"
   export std_private_concepts_constructible
   export std_private_concepts_equality_comparable
@@ -1401,509 +1401,509 @@
   export std_private_type_traits_is_reference
   export std_private_type_traits_remove_cvref
 }
-module std_private_iterator_counted_iterator        [system] { header "__iterator/counted_iterator.h" }
-module std_private_iterator_cpp17_iterator_concepts [system] { header "__iterator/cpp17_iterator_concepts.h" }
-module std_private_iterator_data                    [system] { header "__iterator/data.h" }
-module std_private_iterator_default_sentinel        [system] { header "__iterator/default_sentinel.h" }
-module std_private_iterator_distance                [system] {
+module cxx03_std_private_iterator_counted_iterator        [system] { header "__iterator/counted_iterator.h" }
+module cxx03_std_private_iterator_cpp17_iterator_concepts [system] { header "__iterator/cpp17_iterator_concepts.h" }
+module cxx03_std_private_iterator_data                    [system] { header "__iterator/data.h" }
+module cxx03_std_private_iterator_default_sentinel        [system] { header "__iterator/default_sentinel.h" }
+module cxx03_std_private_iterator_distance                [system] {
   header "__iterator/distance.h"
   export std_private_ranges_size
 }
-module std_private_iterator_empty                   [system] { header "__iterator/empty.h" }
-module std_private_iterator_erase_if_container      [system] { header "__iterator/erase_if_container.h" }
-module std_private_iterator_front_insert_iterator   [system] { header "__iterator/front_insert_iterator.h" }
-module std_private_iterator_incrementable_traits    [system] { header "__iterator/incrementable_traits.h" }
-module std_private_iterator_indirectly_comparable   [system] { header "__iterator/indirectly_comparable.h" }
-module std_private_iterator_insert_iterator         [system] { header "__iterator/insert_iterator.h" }
-module std_private_iterator_istream_iterator        [system] { header "__iterator/istream_iterator.h" }
-module std_private_iterator_istreambuf_iterator     [system] { header "__iterator/istreambuf_iterator.h" }
-module std_private_iterator_iter_move               [system] { header "__iterator/iter_move.h" }
-module std_private_iterator_iter_swap               [system] { header "__iterator/iter_swap.h" }
-module std_private_iterator_iterator                [system] { header "__iterator/iterator.h" }
-module std_private_iterator_iterator_traits         [system] {
+module cxx03_std_private_iterator_empty                   [system] { header "__iterator/empty.h" }
+module cxx03_std_private_iterator_erase_if_container      [system] { header "__iterator/erase_if_container.h" }
+module cxx03_std_private_iterator_front_insert_iterator   [system] { header "__iterator/front_insert_iterator.h" }
+module cxx03_std_private_iterator_incrementable_traits    [system] { header "__iterator/incrementable_traits.h" }
+module cxx03_std_private_iterator_indirectly_comparable   [system] { header "__iterator/indirectly_comparable.h" }
+module cxx03_std_private_iterator_insert_iterator         [system] { header "__iterator/insert_iterator.h" }
+module cxx03_std_private_iterator_istream_iterator        [system] { header "__iterator/istream_iterator.h" }
+module cxx03_std_private_iterator_istreambuf_iterator     [system] { header "__iterator/istreambuf_iterator.h" }
+module cxx03_std_private_iterator_iter_move               [system] { header "__iterator/iter_move.h" }
+module cxx03_std_private_iterator_iter_swap               [system] { header "__iterator/iter_swap.h" }
+module cxx03_std_private_iterator_iterator                [system] { header "__iterator/iterator.h" }
+module cxx03_std_private_iterator_iterator_traits         [system] {
   header "__iterator/iterator_traits.h"
   export std_private_type_traits_is_primary_template
 }
-module std_private_iterator_iterator_with_data      [system] { header "__iterator/iterator_with_data.h" }
-module std_private_iterator_mergeable               [system] {
+module cxx03_std_private_iterator_iterator_with_data      [system] { header "__iterator/iterator_with_data.h" }
+module cxx03_std_private_iterator_mergeable               [system] {
   header "__iterator/mergeable.h"
   export std_private_functional_ranges_operations
 }
-module std_private_iterator_move_iterator           [system] { header "__iterator/move_iterator.h" }
-module std_private_iterator_move_sentinel           [system] { header "__iterator/move_sentinel.h" }
-module std_private_iterator_next                    [system] { header "__iterator/next.h" }
-module std_private_iterator_ostream_iterator        [system] { header "__iterator/ostream_iterator.h" }
-module std_private_iterator_ostreambuf_iterator     [system] {
+module cxx03_std_private_iterator_move_iterator           [system] { header "__iterator/move_iterator.h" }
+module cxx03_std_private_iterator_move_sentinel           [system] { header "__iterator/move_sentinel.h" }
+module cxx03_std_private_iterator_next                    [system] { header "__iterator/next.h" }
+module cxx03_std_private_iterator_ostream_iterator        [system] { header "__iterator/ostream_iterator.h" }
+module cxx03_std_private_iterator_ostreambuf_iterator     [system] {
   header "__iterator/ostreambuf_iterator.h"
   export *
 }
-module std_private_iterator_permutable              [system] { header "__iterator/permutable.h" }
-module std_private_iterator_prev                    [system] { header "__iterator/prev.h" }
-module std_private_iterator_projected               [system] { header "__iterator/projected.h" }
-module std_private_iterator_ranges_iterator_traits  [system] { header "__iterator/ranges_iterator_traits.h" }
-module std_private_iterator_readable_traits         [system] { header "__iterator/readable_traits.h" }
-module std_private_iterator_reverse_access          [system] { header "__iterator/reverse_access.h" }
-module std_private_iterator_reverse_iterator        [system] { header "__iterator/reverse_iterator.h" }
-module std_private_iterator_segmented_iterator      [system] { header "__iterator/segmented_iterator.h" }
-module std_private_iterator_size                    [system] { header "__iterator/size.h" }
-module std_private_iterator_sortable                [system] {
+module cxx03_std_private_iterator_permutable              [system] { header "__iterator/permutable.h" }
+module cxx03_std_private_iterator_prev                    [system] { header "__iterator/prev.h" }
+module cxx03_std_private_iterator_projected               [system] { header "__iterator/projected.h" }
+module cxx03_std_private_iterator_ranges_iterator_traits  [system] { header "__iterator/ranges_iterator_traits.h" }
+module cxx03_std_private_iterator_readable_traits         [system] { header "__iterator/readable_traits.h" }
+module cxx03_std_private_iterator_reverse_access          [system] { header "__iterator/reverse_access.h" }
+module cxx03_std_private_iterator_reverse_iterator        [system] { header "__iterator/reverse_iterator.h" }
+module cxx03_std_private_iterator_segmented_iterator      [system] { header "__iterator/segmented_iterator.h" }
+module cxx03_std_private_iterator_size                    [system] { header "__iterator/size.h" }
+module cxx03_std_private_iterator_sortable                [system] {
   header "__iterator/sortable.h"
   export std_private_functional_ranges_operations
 }
-module std_private_iterator_unreachable_sentinel    [system] { header "__iterator/unreachable_sentinel.h" }
-module std_private_iterator_wrap_iter               [system] { header "__iterator/wrap_iter.h" }
+module cxx03_std_private_iterator_unreachable_sentinel    [system] { header "__iterator/unreachable_sentinel.h" }
+module cxx03_std_private_iterator_wrap_iter               [system] { header "__iterator/wrap_iter.h" }
 
-module std_private_locale_locale_base_api_android              [system] { textual header "__locale_dir/locale_base_api/android.h" }
-module std_private_locale_locale_base_api_bsd_locale_defaults  [system] { textual header "__locale_dir/locale_base_api/bsd_locale_defaults.h" }
-module std_private_locale_locale_base_api_bsd_locale_fallbacks [system] { textual header "__locale_dir/locale_base_api/bsd_locale_fallbacks.h" }
-module std_private_locale_locale_base_api_fuchsia              [system] { textual header "__locale_dir/locale_base_api/fuchsia.h" }
-module std_private_locale_locale_base_api_ibm                  [system] { textual header "__locale_dir/locale_base_api/ibm.h" }
-module std_private_locale_locale_base_api_locale_guard         [system] { header "__locale_dir/locale_base_api/locale_guard.h" }
-module std_private_locale_locale_base_api_musl                 [system] { textual header "__locale_dir/locale_base_api/musl.h" }
-module std_private_locale_locale_base_api_newlib               [system] { textual header "__locale_dir/locale_base_api/newlib.h" }
-module std_private_locale_locale_base_api_openbsd              [system] { textual header "__locale_dir/locale_base_api/openbsd.h" }
-module std_private_locale_locale_base_api_win32                [system] { textual header "__locale_dir/locale_base_api/win32.h" }
-module std_private_locale_locale_base_api                      [system] {
+module cxx03_std_private_locale_locale_base_api_android              [system] { textual header "__locale_dir/locale_base_api/android.h" }
+module cxx03_std_private_locale_locale_base_api_bsd_locale_defaults  [system] { textual header "__locale_dir/locale_base_api/bsd_locale_defaults.h" }
+module cxx03_std_private_locale_locale_base_api_bsd_locale_fallbacks [system] { textual header "__locale_dir/locale_base_api/bsd_locale_fallbacks.h" }
+module cxx03_std_private_locale_locale_base_api_fuchsia              [system] { textual header "__locale_dir/locale_base_api/fuchsia.h" }
+module cxx03_std_private_locale_locale_base_api_ibm                  [system] { textual header "__locale_dir/locale_base_api/ibm.h" }
+module cxx03_std_private_locale_locale_base_api_locale_guard         [system] { header "__locale_dir/locale_base_api/locale_guard.h" }
+module cxx03_std_private_locale_locale_base_api_musl                 [system] { textual header "__locale_dir/locale_base_api/musl.h" }
+module cxx03_std_private_locale_locale_base_api_newlib               [system] { textual header "__locale_dir/locale_base_api/newlib.h" }
+module cxx03_std_private_locale_locale_base_api_openbsd              [system] { textual header "__locale_dir/locale_base_api/openbsd.h" }
+module cxx03_std_private_locale_locale_base_api_win32                [system] { textual header "__locale_dir/locale_base_api/win32.h" }
+module cxx03_std_private_locale_locale_base_api                      [system] {
   header "__locale_dir/locale_base_api.h"
   export *
 }
 
-module std_private_math_abs                             [system] { header "__math/abs.h" }
-module std_private_math_copysign                        [system] { header "__math/copysign.h" }
-module std_private_math_error_functions                 [system] { header "__math/error_functions.h" }
-module std_private_math_exponential_functions           [system] { header "__math/exponential_functions.h" }
-module std_private_math_fdim                            [system] { header "__math/fdim.h" }
-module std_private_math_fma                             [system] { header "__math/fma.h" }
-module std_private_math_gamma                           [system] { header "__math/gamma.h" }
-module std_private_math_hyperbolic_functions            [system] { header "__math/hyperbolic_functions.h" }
-module std_private_math_hypot                           [system] { header "__math/hypot.h" }
-module std_private_math_inverse_hyperbolic_functions    [system] { header "__math/inverse_hyperbolic_functions.h" }
-module std_private_math_inverse_trigonometric_functions [system] { header "__math/inverse_trigonometric_functions.h" }
-module std_private_math_logarithms                      [system] { header "__math/logarithms.h" }
-module std_private_math_min_max                         [system] { header "__math/min_max.h" }
-module std_private_math_modulo                          [system] { header "__math/modulo.h" }
-module std_private_math_remainder                       [system] { header "__math/remainder.h" }
-module std_private_math_roots                           [system] { header "__math/roots.h" }
-module std_private_math_rounding_functions              [system] { header "__math/rounding_functions.h" }
-module std_private_math_special_functions               [system] { header "__math/special_functions.h" }
-module std_private_math_traits                          [system] { header "__math/traits.h" }
-module std_private_math_trigonometric_functions         [system] { header "__math/trigonometric_functions.h" }
+module cxx03_std_private_math_abs                             [system] { header "__math/abs.h" }
+module cxx03_std_private_math_copysign                        [system] { header "__math/copysign.h" }
+module cxx03_std_private_math_error_functions                 [system] { header "__math/error_functions.h" }
+module cxx03_std_private_math_exponential_functions           [system] { header "__math/exponential_functions.h" }
+module cxx03_std_private_math_fdim                            [system] { header "__math/fdim.h" }
+module cxx03_std_private_math_fma                             [system] { header "__math/fma.h" }
+module cxx03_std_private_math_gamma                           [system] { header "__math/gamma.h" }
+module cxx03_std_private_math_hyperbolic_functions            [system] { header "__math/hyperbolic_functions.h" }
+module cxx03_std_private_math_hypot                           [system] { header "__math/hypot.h" }
+module cxx03_std_private_math_inverse_hyperbolic_functions    [system] { header "__math/inverse_hyperbolic_functions.h" }
+module cxx03_std_private_math_inverse_trigonometric_functions [system] { header "__math/inverse_trigonometric_functions.h" }
+module cxx03_std_private_math_logarithms                      [system] { header "__math/logarithms.h" }
+module cxx03_std_private_math_min_max                         [system] { header "__math/min_max.h" }
+module cxx03_std_private_math_modulo                          [system] { header "__math/modulo.h" }
+module cxx03_std_private_math_remainder                       [system] { header "__math/remainder.h" }
+module cxx03_std_private_math_roots                           [system] { header "__math/roots.h" }
+module cxx03_std_private_math_rounding_functions              [system] { header "__math/rounding_functions.h" }
+module cxx03_std_private_math_special_functions               [system] { header "__math/special_functions.h" }
+module cxx03_std_private_math_traits                          [system] { header "__math/traits.h" }
+module cxx03_std_private_math_trigonometric_functions         [system] { header "__math/trigonometric_functions.h" }
 
-module std_private_mdspan_default_accessor [system] { header "__mdspan/default_accessor.h" }
-module std_private_mdspan_extents          [system] {
+module cxx03_std_private_mdspan_default_accessor [system] { header "__mdspan/default_accessor.h" }
+module cxx03_std_private_mdspan_extents          [system] {
   header "__mdspan/extents.h"
   export *
 }
-module std_private_mdspan_layout_left      [system] { header "__mdspan/layout_left.h" }
-module std_private_mdspan_layout_right     [system] { header "__mdspan/layout_right.h" }
-module std_private_mdspan_layout_stride    [system] { header "__mdspan/layout_stride.h" }
-module std_private_mdspan_mdspan           [system] { header "__mdspan/mdspan.h" }
-module std_private_mdspan_mdspan_fwd       [system] { header "__fwd/mdspan.h" }
+module cxx03_std_private_mdspan_layout_left      [system] { header "__mdspan/layout_left.h" }
+module cxx03_std_private_mdspan_layout_right     [system] { header "__mdspan/layout_right.h" }
+module cxx03_std_private_mdspan_layout_stride    [system] { header "__mdspan/layout_stride.h" }
+module cxx03_std_private_mdspan_mdspan           [system] { header "__mdspan/mdspan.h" }
+module cxx03_std_private_mdspan_mdspan_fwd       [system] { header "__fwd/mdspan.h" }
 
-module std_private_memory_addressof                       [system] { header "__memory/addressof.h" }
-module std_private_memory_align                           [system] { header "__memory/align.h" }
-module std_private_memory_aligned_alloc                   [system] { header "__memory/aligned_alloc.h" }
-module std_private_memory_allocate_at_least               [system] { header "__memory/allocate_at_least.h" }
-module std_private_memory_allocation_guard                [system] { header "__memory/allocation_guard.h" }
-module std_private_memory_allocator                       [system] { header "__memory/allocator.h" }
-module std_private_memory_allocator_arg_t                 [system] { header "__memory/allocator_arg_t.h" }
-module std_private_memory_allocator_destructor            [system] { header "__memory/allocator_destructor.h" }
-module std_private_memory_allocator_traits                [system] { header "__memory/allocator_traits.h" }
-module std_private_memory_assume_aligned                  [system] { header "__memory/assume_aligned.h" }
-module std_private_memory_auto_ptr                        [system] { header "__memory/auto_ptr.h" }
-module std_private_memory_builtin_new_allocator           [system] {
+module cxx03_std_private_memory_addressof                       [system] { header "__memory/addressof.h" }
+module cxx03_std_private_memory_align                           [system] { header "__memory/align.h" }
+module cxx03_std_private_memory_aligned_alloc                   [system] { header "__memory/aligned_alloc.h" }
+module cxx03_std_private_memory_allocate_at_least               [system] { header "__memory/allocate_at_least.h" }
+module cxx03_std_private_memory_allocation_guard                [system] { header "__memory/allocation_guard.h" }
+module cxx03_std_private_memory_allocator                       [system] { header "__memory/allocator.h" }
+module cxx03_std_private_memory_allocator_arg_t                 [system] { header "__memory/allocator_arg_t.h" }
+module cxx03_std_private_memory_allocator_destructor            [system] { header "__memory/allocator_destructor.h" }
+module cxx03_std_private_memory_allocator_traits                [system] { header "__memory/allocator_traits.h" }
+module cxx03_std_private_memory_assume_aligned                  [system] { header "__memory/assume_aligned.h" }
+module cxx03_std_private_memory_auto_ptr                        [system] { header "__memory/auto_ptr.h" }
+module cxx03_std_private_memory_builtin_new_allocator           [system] {
   header "__memory/builtin_new_allocator.h"
   export *
 }
-module std_private_memory_compressed_pair                 [system] { header "__memory/compressed_pair.h" }
-module std_private_memory_concepts                        [system] {
+module cxx03_std_private_memory_compressed_pair                 [system] { header "__memory/compressed_pair.h" }
+module cxx03_std_private_memory_concepts                        [system] {
   header "__memory/concepts.h"
   export std_private_type_traits_remove_reference
 }
-module std_private_memory_construct_at                    [system] { header "__memory/construct_at.h" }
-module std_private_memory_destruct_n                      [system] { header "__memory/destruct_n.h" }
-module std_private_memory_fwd                             [system] { header "__fwd/memory.h" }
-module std_private_memory_inout_ptr                       [system] { header "__memory/inout_ptr.h" }
-module std_private_memory_out_ptr                         [system] { header "__memory/out_ptr.h" }
-module std_private_memory_pointer_traits                  [system] { header "__memory/pointer_traits.h" }
-module std_private_memory_ranges_construct_at             [system] { header "__memory/ranges_construct_at.h" }
-module std_private_memory_ranges_uninitialized_algorithms [system] {
+module cxx03_std_private_memory_construct_at                    [system] { header "__memory/construct_at.h" }
+module cxx03_std_private_memory_destruct_n                      [system] { header "__memory/destruct_n.h" }
+module cxx03_std_private_memory_fwd                             [system] { header "__fwd/memory.h" }
+module cxx03_std_private_memory_inout_ptr                       [system] { header "__memory/inout_ptr.h" }
+module cxx03_std_private_memory_out_ptr                         [system] { header "__memory/out_ptr.h" }
+module cxx03_std_private_memory_pointer_traits                  [system] { header "__memory/pointer_traits.h" }
+module cxx03_std_private_memory_ranges_construct_at             [system] { header "__memory/ranges_construct_at.h" }
+module cxx03_std_private_memory_ranges_uninitialized_algorithms [system] {
   header "__memory/ranges_uninitialized_algorithms.h"
   export std_private_algorithm_in_out_result
 }
-module std_private_memory_raw_storage_iterator            [system] { header "__memory/raw_storage_iterator.h" }
-module std_private_memory_shared_ptr                      [system] {
+module cxx03_std_private_memory_raw_storage_iterator            [system] { header "__memory/raw_storage_iterator.h" }
+module cxx03_std_private_memory_shared_ptr                      [system] {
   header "__memory/shared_ptr.h"
   export std_private_memory_uninitialized_algorithms
 }
-module std_private_memory_swap_allocator                  [system] { header "__memory/swap_allocator.h" }
-module std_private_memory_temp_value                      [system] { header "__memory/temp_value.h" }
-module std_private_memory_temporary_buffer                [system] {
+module cxx03_std_private_memory_swap_allocator                  [system] { header "__memory/swap_allocator.h" }
+module cxx03_std_private_memory_temp_value                      [system] { header "__memory/temp_value.h" }
+module cxx03_std_private_memory_temporary_buffer                [system] {
   header "__memory/temporary_buffer.h"
   export std_private_utility_pair
 }
-module std_private_memory_uninitialized_algorithms        [system] {
+module cxx03_std_private_memory_uninitialized_algorithms        [system] {
   header "__memory/uninitialized_algorithms.h"
   export std_private_algorithm_copy
 }
-module std_private_memory_unique_ptr                      [system] {
+module cxx03_std_private_memory_unique_ptr                      [system] {
   header "__memory/unique_ptr.h"
   export std_private_type_traits_add_lvalue_reference
   export std_private_type_traits_is_pointer
   export std_private_type_traits_type_identity
 }
-module std_private_memory_uses_allocator                  [system] { header "__memory/uses_allocator.h" }
-module std_private_memory_uses_allocator_construction     [system] { header "__memory/uses_allocator_construction.h" }
-module std_private_memory_voidify                         [system] { header "__memory/voidify.h" }
+module cxx03_std_private_memory_uses_allocator                  [system] { header "__memory/uses_allocator.h" }
+module cxx03_std_private_memory_uses_allocator_construction     [system] { header "__memory/uses_allocator_construction.h" }
+module cxx03_std_private_memory_voidify                         [system] { header "__memory/voidify.h" }
 
-module std_private_memory_resource_memory_resource              [system] { header "__memory_resource/memory_resource.h" }
-module std_private_memory_resource_memory_resource_fwd          [system] { header "__fwd/memory_resource.h" }
-module std_private_memory_resource_monotonic_buffer_resource    [system] { header "__memory_resource/monotonic_buffer_resource.h" }
-module std_private_memory_resource_polymorphic_allocator        [system] { header "__memory_resource/polymorphic_allocator.h" }
-module std_private_memory_resource_pool_options                 [system] { header "__memory_resource/pool_options.h" }
-module std_private_memory_resource_synchronized_pool_resource   [system] {
+module cxx03_std_private_memory_resource_memory_resource              [system] { header "__memory_resource/memory_resource.h" }
+module cxx03_std_private_memory_resource_memory_resource_fwd          [system] { header "__fwd/memory_resource.h" }
+module cxx03_std_private_memory_resource_monotonic_buffer_resource    [system] { header "__memory_resource/monotonic_buffer_resource.h" }
+module cxx03_std_private_memory_resource_polymorphic_allocator        [system] { header "__memory_resource/polymorphic_allocator.h" }
+module cxx03_std_private_memory_resource_pool_options                 [system] { header "__memory_resource/pool_options.h" }
+module cxx03_std_private_memory_resource_synchronized_pool_resource   [system] {
   header "__memory_resource/synchronized_pool_resource.h"
   export *
 }
-module std_private_memory_resource_unsynchronized_pool_resource [system] { header "__memory_resource/unsynchronized_pool_resource.h" }
+module cxx03_std_private_memory_resource_unsynchronized_pool_resource [system] { header "__memory_resource/unsynchronized_pool_resource.h" }
 
-module std_private_mutex_lock_guard  [system] { header "__mutex/lock_guard.h" }
-module std_private_mutex_mutex       [system] { header "__mutex/mutex.h" }
-module std_private_mutex_once_flag  [system]  { header "__mutex/once_flag.h" }
-module std_private_mutex_tag_types   [system] { header "__mutex/tag_types.h" }
-module std_private_mutex_unique_lock [system] { header "__mutex/unique_lock.h" }
+module cxx03_std_private_mutex_lock_guard  [system] { header "__mutex/lock_guard.h" }
+module cxx03_std_private_mutex_mutex       [system] { header "__mutex/mutex.h" }
+module cxx03_std_private_mutex_once_flag  [system]  { header "__mutex/once_flag.h" }
+module cxx03_std_private_mutex_tag_types   [system] { header "__mutex/tag_types.h" }
+module cxx03_std_private_mutex_unique_lock [system] { header "__mutex/unique_lock.h" }
 
-module std_private_numeric_accumulate               [system] { header "__numeric/accumulate.h" }
-module std_private_numeric_adjacent_difference      [system] { header "__numeric/adjacent_difference.h" }
-module std_private_numeric_exclusive_scan           [system] { header "__numeric/exclusive_scan.h" }
-module std_private_numeric_gcd_lcm                  [system] { header "__numeric/gcd_lcm.h" }
-module std_private_numeric_inclusive_scan           [system] { header "__numeric/inclusive_scan.h" }
-module std_private_numeric_inner_product            [system] { header "__numeric/inner_product.h" }
-module std_private_numeric_iota                     [system] { header "__numeric/iota.h" }
-module std_private_numeric_midpoint                 [system] { header "__numeric/midpoint.h" }
-module std_private_numeric_partial_sum              [system] { header "__numeric/partial_sum.h" }
-module std_private_numeric_pstl                     [system] {
+module cxx03_std_private_numeric_accumulate               [system] { header "__numeric/accumulate.h" }
+module cxx03_std_private_numeric_adjacent_difference      [system] { header "__numeric/adjacent_difference.h" }
+module cxx03_std_private_numeric_exclusive_scan           [system] { header "__numeric/exclusive_scan.h" }
+module cxx03_std_private_numeric_gcd_lcm                  [system] { header "__numeric/gcd_lcm.h" }
+module cxx03_std_private_numeric_inclusive_scan           [system] { header "__numeric/inclusive_scan.h" }
+module cxx03_std_private_numeric_inner_product            [system] { header "__numeric/inner_product.h" }
+module cxx03_std_private_numeric_iota                     [system] { header "__numeric/iota.h" }
+module cxx03_std_private_numeric_midpoint                 [system] { header "__numeric/midpoint.h" }
+module cxx03_std_private_numeric_partial_sum              [system] { header "__numeric/partial_sum.h" }
+module cxx03_std_private_numeric_pstl                     [system] {
   header "__numeric/pstl.h"
   export *
 }
-module std_private_numeric_reduce                   [system] { header "__numeric/reduce.h" }
-module std_private_numeric_saturation_arithmetic    [system] { header "__numeric/saturation_arithmetic.h" }
-module std_private_numeric_transform_exclusive_scan [system] { header "__numeric/transform_exclusive_scan.h" }
-module std_private_numeric_transform_inclusive_scan [system] { header "__numeric/transform_inclusive_scan.h" }
-module std_private_numeric_transform_reduce         [system] { header "__numeric/transform_reduce.h" }
+module cxx03_std_private_numeric_reduce                   [system] { header "__numeric/reduce.h" }
+module cxx03_std_private_numeric_saturation_arithmetic    [system] { header "__numeric/saturation_arithmetic.h" }
+module cxx03_std_private_numeric_transform_exclusive_scan [system] { header "__numeric/transform_exclusive_scan.h" }
+module cxx03_std_private_numeric_transform_inclusive_scan [system] { header "__numeric/transform_inclusive_scan.h" }
+module cxx03_std_private_numeric_transform_reduce         [system] { header "__numeric/transform_reduce.h" }
 
-module std_private_pstl_backend                    [system] {
+module cxx03_std_private_pstl_backend                    [system] {
   header "__pstl/backend.h"
   export *
 }
-module std_private_pstl_backend_fwd                [system] {
+module cxx03_std_private_pstl_backend_fwd                [system] {
   header "__pstl/backend_fwd.h"
   export *
 }
-module std_private_pstl_backends_default           [system] {
+module cxx03_std_private_pstl_backends_default           [system] {
   header "__pstl/backends/default.h"
   export *
 }
-module std_private_pstl_backends_libdispatch       [system] {
+module cxx03_std_private_pstl_backends_libdispatch       [system] {
   header "__pstl/backends/libdispatch.h"
   export *
 }
-module std_private_pstl_backends_serial            [system] {
+module cxx03_std_private_pstl_backends_serial            [system] {
   header "__pstl/backends/serial.h"
   export *
 }
-module std_private_pstl_backends_std_thread        [system] {
+module cxx03_std_private_pstl_backends_std_thread        [system] {
   header "__pstl/backends/std_thread.h"
   export *
 }
-module std_private_pstl_cpu_algos_any_of           [system] { header "__pstl/cpu_algos/any_of.h" }
-module std_private_pstl_cpu_algos_cpu_traits       [system] { header "__pstl/cpu_algos/cpu_traits.h" }
-module std_private_pstl_cpu_algos_fill             [system] { header "__pstl/cpu_algos/fill.h" }
-module std_private_pstl_cpu_algos_find_if          [system] { header "__pstl/cpu_algos/find_if.h" }
-module std_private_pstl_cpu_algos_for_each         [system] { header "__pstl/cpu_algos/for_each.h" }
-module std_private_pstl_cpu_algos_merge            [system] { header "__pstl/cpu_algos/merge.h" }
-module std_private_pstl_cpu_algos_stable_sort      [system] { header "__pstl/cpu_algos/stable_sort.h" }
-module std_private_pstl_cpu_algos_transform        [system] { header "__pstl/cpu_algos/transform.h" }
-module std_private_pstl_cpu_algos_transform_reduce [system] { header "__pstl/cpu_algos/transform_reduce.h" }
-module std_private_pstl_dispatch                   [system] { header "__pstl/dispatch.h" }
-module std_private_pstl_handle_exception           [system] { header "__pstl/handle_exception.h" }
+module cxx03_std_private_pstl_cpu_algos_any_of           [system] { header "__pstl/cpu_algos/any_of.h" }
+module cxx03_std_private_pstl_cpu_algos_cpu_traits       [system] { header "__pstl/cpu_algos/cpu_traits.h" }
+module cxx03_std_private_pstl_cpu_algos_fill             [system] { header "__pstl/cpu_algos/fill.h" }
+module cxx03_std_private_pstl_cpu_algos_find_if          [system] { header "__pstl/cpu_algos/find_if.h" }
+module cxx03_std_private_pstl_cpu_algos_for_each         [system] { header "__pstl/cpu_algos/for_each.h" }
+module cxx03_std_private_pstl_cpu_algos_merge            [system] { header "__pstl/cpu_algos/merge.h" }
+module cxx03_std_private_pstl_cpu_algos_stable_sort      [system] { header "__pstl/cpu_algos/stable_sort.h" }
+module cxx03_std_private_pstl_cpu_algos_transform        [system] { header "__pstl/cpu_algos/transform.h" }
+module cxx03_std_private_pstl_cpu_algos_transform_reduce [system] { header "__pstl/cpu_algos/transform_reduce.h" }
+module cxx03_std_private_pstl_dispatch                   [system] { header "__pstl/dispatch.h" }
+module cxx03_std_private_pstl_handle_exception           [system] { header "__pstl/handle_exception.h" }
 
-module std_private_queue_fwd [system] { header "__fwd/queue.h" }
+module cxx03_std_private_queue_fwd [system] { header "__fwd/queue.h" }
 
-module std_private_ostream_basic_ostream [system] {
+module cxx03_std_private_ostream_basic_ostream [system] {
   header "__ostream/basic_ostream.h"
   export std_streambuf
 }
-module std_private_ostream_print         [system] {
+module cxx03_std_private_ostream_print         [system] {
   header "__ostream/print.h"
   export std_print
 }
 
-module std_private_random_bernoulli_distribution          [system] { header "__random/bernoulli_distribution.h" }
-module std_private_random_binomial_distribution           [system] { header "__random/binomial_distribution.h" }
-module std_private_random_cauchy_distribution             [system] { header "__random/cauchy_distribution.h" }
-module std_private_random_chi_squared_distribution        [system] { header "__random/chi_squared_distribution.h" }
-module std_private_random_clamp_to_integral               [system] { header "__random/clamp_to_integral.h" }
-module std_private_random_default_random_engine           [system] { header "__random/default_random_engine.h" }
-module std_private_random_discard_block_engine            [system] { header "__random/discard_block_engine.h" }
-module std_private_random_discrete_distribution           [system] {
+module cxx03_std_private_random_bernoulli_distribution          [system] { header "__random/bernoulli_distribution.h" }
+module cxx03_std_private_random_binomial_distribution           [system] { header "__random/binomial_distribution.h" }
+module cxx03_std_private_random_cauchy_distribution             [system] { header "__random/cauchy_distribution.h" }
+module cxx03_std_private_random_chi_squared_distribution        [system] { header "__random/chi_squared_distribution.h" }
+module cxx03_std_private_random_clamp_to_integral               [system] { header "__random/clamp_to_integral.h" }
+module cxx03_std_private_random_default_random_engine           [system] { header "__random/default_random_engine.h" }
+module cxx03_std_private_random_discard_block_engine            [system] { header "__random/discard_block_engine.h" }
+module cxx03_std_private_random_discrete_distribution           [system] {
   header "__random/discrete_distribution.h"
   export *
 }
-module std_private_random_exponential_distribution        [system] { header "__random/exponential_distribution.h" }
-module std_private_random_extreme_value_distribution      [system] { header "__random/extreme_value_distribution.h" }
-module std_private_random_fisher_f_distribution           [system] { header "__random/fisher_f_distribution.h" }
-module std_private_random_gamma_distribution              [system] { header "__random/gamma_distribution.h" }
-module std_private_random_generate_canonical              [system] { header "__random/generate_canonical.h" }
-module std_private_random_geometric_distribution          [system] { header "__random/geometric_distribution.h" }
-module std_private_random_independent_bits_engine         [system] { header "__random/independent_bits_engine.h" }
-module std_private_random_is_seed_sequence                [system] { header "__random/is_seed_sequence.h" }
-module std_private_random_is_valid                        [system] { header "__random/is_valid.h" }
-module std_private_random_knuth_b                         [system] { header "__random/knuth_b.h" }
-module std_private_random_linear_congruential_engine      [system] { header "__random/linear_congruential_engine.h" }
-module std_private_random_log2                            [system] { header "__random/log2.h" }
-module std_private_random_lognormal_distribution          [system] { header "__random/lognormal_distribution.h" }
-module std_private_random_mersenne_twister_engine         [system] { header "__random/mersenne_twister_engine.h" }
-module std_private_random_negative_binomial_distribution  [system] { header "__random/negative_binomial_distribution.h" }
-module std_private_random_normal_distribution             [system] { header "__random/normal_distribution.h" }
-module std_private_random_piecewise_constant_distribution [system] {
+module cxx03_std_private_random_exponential_distribution        [system] { header "__random/exponential_distribution.h" }
+module cxx03_std_private_random_extreme_value_distribution      [system] { header "__random/extreme_value_distribution.h" }
+module cxx03_std_private_random_fisher_f_distribution           [system] { header "__random/fisher_f_distribution.h" }
+module cxx03_std_private_random_gamma_distribution              [system] { header "__random/gamma_distribution.h" }
+module cxx03_std_private_random_generate_canonical              [system] { header "__random/generate_canonical.h" }
+module cxx03_std_private_random_geometric_distribution          [system] { header "__random/geometric_distribution.h" }
+module cxx03_std_private_random_independent_bits_engine         [system] { header "__random/independent_bits_engine.h" }
+module cxx03_std_private_random_is_seed_sequence                [system] { header "__random/is_seed_sequence.h" }
+module cxx03_std_private_random_is_valid                        [system] { header "__random/is_valid.h" }
+module cxx03_std_private_random_knuth_b                         [system] { header "__random/knuth_b.h" }
+module cxx03_std_private_random_linear_congruential_engine      [system] { header "__random/linear_congruential_engine.h" }
+module cxx03_std_private_random_log2                            [system] { header "__random/log2.h" }
+module cxx03_std_private_random_lognormal_distribution          [system] { header "__random/lognormal_distribution.h" }
+module cxx03_std_private_random_mersenne_twister_engine         [system] { header "__random/mersenne_twister_engine.h" }
+module cxx03_std_private_random_negative_binomial_distribution  [system] { header "__random/negative_binomial_distribution.h" }
+module cxx03_std_private_random_normal_distribution             [system] { header "__random/normal_distribution.h" }
+module cxx03_std_private_random_piecewise_constant_distribution [system] {
   header "__random/piecewise_constant_distribution.h"
   export *
 }
-module std_private_random_piecewise_linear_distribution   [system] {
+module cxx03_std_private_random_piecewise_linear_distribution   [system] {
   header "__random/piecewise_linear_distribution.h"
   export *
 }
-module std_private_random_poisson_distribution            [system] { header "__random/poisson_distribution.h" }
-module std_private_random_random_device                   [system] {
+module cxx03_std_private_random_poisson_distribution            [system] { header "__random/poisson_distribution.h" }
+module cxx03_std_private_random_random_device                   [system] {
   header "__random/random_device.h"
   export *
 }
-module std_private_random_ranlux                          [system] { header "__random/ranlux.h" }
-module std_private_random_seed_seq                        [system] {
+module cxx03_std_private_random_ranlux                          [system] { header "__random/ranlux.h" }
+module cxx03_std_private_random_seed_seq                        [system] {
   header "__random/seed_seq.h"
   export *
 }
-module std_private_random_shuffle_order_engine            [system] { header "__random/shuffle_order_engine.h" }
-module std_private_random_student_t_distribution          [system] { header "__random/student_t_distribution.h" }
-module std_private_random_subtract_with_carry_engine      [system] { header "__random/subtract_with_carry_engine.h" }
-module std_private_random_uniform_int_distribution        [system] { header "__random/uniform_int_distribution.h" }
-module std_private_random_uniform_random_bit_generator    [system] { header "__random/uniform_random_bit_generator.h" }
-module std_private_random_uniform_real_distribution       [system] { header "__random/uniform_real_distribution.h" }
-module std_private_random_weibull_distribution            [system] { header "__random/weibull_distribution.h" }
+module cxx03_std_private_random_shuffle_order_engine            [system] { header "__random/shuffle_order_engine.h" }
+module cxx03_std_private_random_student_t_distribution          [system] { header "__random/student_t_distribution.h" }
+module cxx03_std_private_random_subtract_with_carry_engine      [system] { header "__random/subtract_with_carry_engine.h" }
+module cxx03_std_private_random_uniform_int_distribution        [system] { header "__random/uniform_int_distribution.h" }
+module cxx03_std_private_random_uniform_random_bit_generator    [system] { header "__random/uniform_random_bit_generator.h" }
+module cxx03_std_private_random_uniform_real_distribution       [system] { header "__random/uniform_real_distribution.h" }
+module cxx03_std_private_random_weibull_distribution            [system] { header "__random/weibull_distribution.h" }
 
-module std_private_ranges_access                     [system] { header "__ranges/access.h" }
-module std_private_ranges_all                        [system] {
+module cxx03_std_private_ranges_access                     [system] { header "__ranges/access.h" }
+module cxx03_std_private_ranges_all                        [system] {
   header "__ranges/all.h"
   export std_private_functional_compose
   export std_private_functional_perfect_forward
   export std_private_ranges_owning_view
 }
-module std_private_ranges_as_rvalue_view             [system] { header "__ranges/as_rvalue_view.h" }
-module std_private_ranges_chunk_by_view              [system] { header "__ranges/chunk_by_view.h" }
-module std_private_ranges_common_view                [system] { header "__ranges/common_view.h" }
-module std_private_ranges_concepts                   [system] {
+module cxx03_std_private_ranges_as_rvalue_view             [system] { header "__ranges/as_rvalue_view.h" }
+module cxx03_std_private_ranges_chunk_by_view              [system] { header "__ranges/chunk_by_view.h" }
+module cxx03_std_private_ranges_common_view                [system] { header "__ranges/common_view.h" }
+module cxx03_std_private_ranges_concepts                   [system] {
   header "__ranges/concepts.h"
   export std_private_iterator_concepts
 }
-module std_private_ranges_container_compatible_range [system] { header "__ranges/container_compatible_range.h" }
-module std_private_ranges_counted                    [system] {
+module cxx03_std_private_ranges_container_compatible_range [system] { header "__ranges/container_compatible_range.h" }
+module cxx03_std_private_ranges_counted                    [system] {
   header "__ranges/counted.h"
   export std_span
 }
-module std_private_ranges_dangling                   [system] { header "__ranges/dangling.h" }
-module std_private_ranges_data                       [system] { header "__ranges/data.h" }
-module std_private_ranges_drop_view                  [system] { header "__ranges/drop_view.h" }
-module std_private_ranges_drop_while_view            [system] { header "__ranges/drop_while_view.h" }
-module std_private_ranges_elements_view              [system] { header "__ranges/elements_view.h" }
-module std_private_ranges_empty                      [system] { header "__ranges/empty.h" }
-module std_private_ranges_empty_view                 [system] { header "__ranges/empty_view.h" }
-module std_private_ranges_enable_borrowed_range      [system] { header "__ranges/enable_borrowed_range.h" }
-module std_private_ranges_enable_view                [system] { header "__ranges/enable_view.h" }
-module std_private_ranges_filter_view                [system] {
+module cxx03_std_private_ranges_dangling                   [system] { header "__ranges/dangling.h" }
+module cxx03_std_private_ranges_data                       [system] { header "__ranges/data.h" }
+module cxx03_std_private_ranges_drop_view                  [system] { header "__ranges/drop_view.h" }
+module cxx03_std_private_ranges_drop_while_view            [system] { header "__ranges/drop_while_view.h" }
+module cxx03_std_private_ranges_elements_view              [system] { header "__ranges/elements_view.h" }
+module cxx03_std_private_ranges_empty                      [system] { header "__ranges/empty.h" }
+module cxx03_std_private_ranges_empty_view                 [system] { header "__ranges/empty_view.h" }
+module cxx03_std_private_ranges_enable_borrowed_range      [system] { header "__ranges/enable_borrowed_range.h" }
+module cxx03_std_private_ranges_enable_view                [system] { header "__ranges/enable_view.h" }
+module cxx03_std_private_ranges_filter_view                [system] {
   header "__ranges/filter_view.h"
   export std_private_ranges_range_adaptor
 }
-module std_private_ranges_from_range                 [system] { header "__ranges/from_range.h" }
-module std_private_ranges_iota_view                  [system] { header "__ranges/iota_view.h" }
-module std_private_ranges_istream_view               [system] {
+module cxx03_std_private_ranges_from_range                 [system] { header "__ranges/from_range.h" }
+module cxx03_std_private_ranges_iota_view                  [system] { header "__ranges/iota_view.h" }
+module cxx03_std_private_ranges_istream_view               [system] {
   header "__ranges/istream_view.h"
 }
-module std_private_ranges_join_view                  [system] {
+module cxx03_std_private_ranges_join_view                  [system] {
   header "__ranges/join_view.h"
   export std_private_iterator_iterator_with_data
   export std_private_iterator_segmented_iterator
 }
-module std_private_ranges_lazy_split_view            [system] {
+module cxx03_std_private_ranges_lazy_split_view            [system] {
   header "__ranges/lazy_split_view.h"
   export std_private_ranges_non_propagating_cache
 }
-module std_private_ranges_movable_box                [system] { header "__ranges/movable_box.h" }
-module std_private_ranges_non_propagating_cache      [system] { header "__ranges/non_propagating_cache.h" }
-module std_private_ranges_owning_view                [system] { header "__ranges/owning_view.h" }
-module std_private_ranges_range_adaptor              [system] { header "__ranges/range_adaptor.h" }
-module std_private_ranges_rbegin                     [system] { header "__ranges/rbegin.h" }
-module std_private_ranges_ref_view                   [system] { header "__ranges/ref_view.h" }
-module std_private_ranges_rend                       [system] { header "__ranges/rend.h" }
-module std_private_ranges_repeat_view                [system] { header "__ranges/repeat_view.h" }
-module std_private_ranges_reverse_view               [system] { header "__ranges/reverse_view.h" }
-module std_private_ranges_single_view                [system] { header "__ranges/single_view.h" }
-module std_private_ranges_size                       [system] {
+module cxx03_std_private_ranges_movable_box                [system] { header "__ranges/movable_box.h" }
+module cxx03_std_private_ranges_non_propagating_cache      [system] { header "__ranges/non_propagating_cache.h" }
+module cxx03_std_private_ranges_owning_view                [system] { header "__ranges/owning_view.h" }
+module cxx03_std_private_ranges_range_adaptor              [system] { header "__ranges/range_adaptor.h" }
+module cxx03_std_private_ranges_rbegin                     [system] { header "__ranges/rbegin.h" }
+module cxx03_std_private_ranges_ref_view                   [system] { header "__ranges/ref_view.h" }
+module cxx03_std_private_ranges_rend                       [system] { header "__ranges/rend.h" }
+module cxx03_std_private_ranges_repeat_view                [system] { header "__ranges/repeat_view.h" }
+module cxx03_std_private_ranges_reverse_view               [system] { header "__ranges/reverse_view.h" }
+module cxx03_std_private_ranges_single_view                [system] { header "__ranges/single_view.h" }
+module cxx03_std_private_ranges_size                       [system] {
   header "__ranges/size.h"
   export std_private_type_traits_make_unsigned
 }
-module std_private_ranges_split_view                 [system] { header "__ranges/split_view.h" }
-module std_private_ranges_subrange                   [system] {
+module cxx03_std_private_ranges_split_view                 [system] { header "__ranges/split_view.h" }
+module cxx03_std_private_ranges_subrange                   [system] {
   header "__ranges/subrange.h"
   export std_private_ranges_subrange_fwd
 }
-module std_private_ranges_subrange_fwd               [system] {
+module cxx03_std_private_ranges_subrange_fwd               [system] {
   header "__fwd/subrange.h"
   export std_private_iterator_concepts
 }
-module std_private_ranges_take_view                  [system] { header "__ranges/take_view.h" }
-module std_private_ranges_take_while_view            [system] { header "__ranges/take_while_view.h" }
-module std_private_ranges_to                         [system] { header "__ranges/to.h" }
-module std_private_ranges_transform_view             [system] {
+module cxx03_std_private_ranges_take_view                  [system] { header "__ranges/take_view.h" }
+module cxx03_std_private_ranges_take_while_view            [system] { header "__ranges/take_while_view.h" }
+module cxx03_std_private_ranges_to                         [system] { header "__ranges/to.h" }
+module cxx03_std_private_ranges_transform_view             [system] {
   header "__ranges/transform_view.h"
   export std_private_functional_bind_back
   export std_private_functional_perfect_forward
   export std_private_ranges_movable_box
 }
-module std_private_ranges_view_interface             [system] { header "__ranges/view_interface.h" }
-module std_private_ranges_views                      [system] { header "__ranges/views.h" }
-module std_private_ranges_zip_view                   [system] {
+module cxx03_std_private_ranges_view_interface             [system] { header "__ranges/view_interface.h" }
+module cxx03_std_private_ranges_views                      [system] { header "__ranges/views.h" }
+module cxx03_std_private_ranges_zip_view                   [system] {
   header "__ranges/zip_view.h"
   export std_private_utility_pair
 }
 
-module std_private_span_span_fwd [system] { header "__fwd/span.h" }
+module cxx03_std_private_span_span_fwd [system] { header "__fwd/span.h" }
 
-module std_private_stack_fwd [system] { header "__fwd/stack.h" }
+module cxx03_std_private_stack_fwd [system] { header "__fwd/stack.h" }
 
-module std_private_stop_token_atomic_unique_lock   [system] { header "__stop_token/atomic_unique_lock.h" }
-module std_private_stop_token_intrusive_list_view  [system] { header "__stop_token/intrusive_list_view.h" }
-module std_private_stop_token_intrusive_shared_ptr [system] { header "__stop_token/intrusive_shared_ptr.h" }
-module std_private_stop_token_stop_callback        [system] { header "__stop_token/stop_callback.h" }
-module std_private_stop_token_stop_source          [system] {
+module cxx03_std_private_stop_token_atomic_unique_lock   [system] { header "__stop_token/atomic_unique_lock.h" }
+module cxx03_std_private_stop_token_intrusive_list_view  [system] { header "__stop_token/intrusive_list_view.h" }
+module cxx03_std_private_stop_token_intrusive_shared_ptr [system] { header "__stop_token/intrusive_shared_ptr.h" }
+module cxx03_std_private_stop_token_stop_callback        [system] { header "__stop_token/stop_callback.h" }
+module cxx03_std_private_stop_token_stop_source          [system] {
   header "__stop_token/stop_source.h"
   export *
 }
-module std_private_stop_token_stop_state           [system] {
+module cxx03_std_private_stop_token_stop_state           [system] {
   header "__stop_token/stop_state.h"
   export *
 }
-module std_private_stop_token_stop_token           [system] {
+module cxx03_std_private_stop_token_stop_token           [system] {
   header "__stop_token/stop_token.h"
   export *
 }
 
-module std_private_string_char_traits           [system] {
+module cxx03_std_private_string_char_traits           [system] {
   header "__string/char_traits.h"
   export *
 }
-module std_private_string_constexpr_c_functions [system] {
+module cxx03_std_private_string_constexpr_c_functions [system] {
   header "__string/constexpr_c_functions.h"
   export std_private_type_traits_is_equality_comparable
 }
-module std_private_string_extern_template_lists [system] { header "__string/extern_template_lists.h" }
-module std_private_string_string_fwd            [system] { header "__fwd/string.h" }
+module cxx03_std_private_string_extern_template_lists [system] { header "__string/extern_template_lists.h" }
+module cxx03_std_private_string_string_fwd            [system] { header "__fwd/string.h" }
 
-module std_private_string_view_string_view_fwd [system] { header "__fwd/string_view.h" }
+module cxx03_std_private_string_view_string_view_fwd [system] { header "__fwd/string_view.h" }
 
-module std_private_system_error_errc            [system] { header "__system_error/errc.h" }
-module std_private_system_error_error_category  [system] { header "__system_error/error_category.h" }
-module std_private_system_error_error_code      [system] {
+module cxx03_std_private_system_error_errc            [system] { header "__system_error/errc.h" }
+module cxx03_std_private_system_error_error_category  [system] { header "__system_error/error_category.h" }
+module cxx03_std_private_system_error_error_code      [system] {
   header "__system_error/error_code.h"
   export std_private_functional_hash
   export std_private_functional_unary_function
 }
-module std_private_system_error_error_condition [system] {
+module cxx03_std_private_system_error_error_condition [system] {
   header "__system_error/error_condition.h"
   export std_private_functional_hash
   export std_private_functional_unary_function
 }
-module std_private_system_error_system_error    [system] { header "__system_error/system_error.h" }
+module cxx03_std_private_system_error_system_error    [system] { header "__system_error/system_error.h" }
 
-module std_private_thread_formatter            [system] { header "__thread/formatter.h" }
-module std_private_thread_id                   [system] { header "__thread/id.h" }
-module std_private_thread_jthread              [system] {
+module cxx03_std_private_thread_formatter            [system] { header "__thread/formatter.h" }
+module cxx03_std_private_thread_id                   [system] { header "__thread/id.h" }
+module cxx03_std_private_thread_jthread              [system] {
   header "__thread/jthread.h"
   export *
 }
-module std_private_thread_poll_with_backoff    [system] { header "__thread/poll_with_backoff.h" }
-module std_private_thread_support              [system] {
+module cxx03_std_private_thread_poll_with_backoff    [system] { header "__thread/poll_with_backoff.h" }
+module cxx03_std_private_thread_support              [system] {
   header "__thread/support.h"
   export *
 }
-module std_private_thread_support_c11          [system] { textual header "__thread/support/c11.h" }
-module std_private_thread_support_external     [system] { textual header "__thread/support/external.h" }
-module std_private_thread_support_pthread      [system] { textual header "__thread/support/pthread.h" }
-module std_private_thread_support_windows      [system] { textual header "__thread/support/windows.h" }
-module std_private_thread_this_thread          [system] { header "__thread/this_thread.h" }
-module std_private_thread_thread               [system] {
+module cxx03_std_private_thread_support_c11          [system] { textual header "__thread/support/c11.h" }
+module cxx03_std_private_thread_support_external     [system] { textual header "__thread/support/external.h" }
+module cxx03_std_private_thread_support_pthread      [system] { textual header "__thread/support/pthread.h" }
+module cxx03_std_private_thread_support_windows      [system] { textual header "__thread/support/windows.h" }
+module cxx03_std_private_thread_this_thread          [system] { header "__thread/this_thread.h" }
+module cxx03_std_private_thread_thread               [system] {
   header "__thread/thread.h"
   export *
 }
-module std_private_thread_timed_backoff_policy [system] { header "__thread/timed_backoff_policy.h" }
+module cxx03_std_private_thread_timed_backoff_policy [system] { header "__thread/timed_backoff_policy.h" }
 
-module std_private_tuple_find_index             [system] { header "__tuple/find_index.h" }
-module std_private_tuple_ignore                 [system] { header "__tuple/ignore.h" }
-module std_private_tuple_make_tuple_types       [system] { header "__tuple/make_tuple_types.h" }
-module std_private_tuple_tuple_like_no_subrange [system] {
+module cxx03_std_private_tuple_find_index             [system] { header "__tuple/find_index.h" }
+module cxx03_std_private_tuple_ignore                 [system] { header "__tuple/ignore.h" }
+module cxx03_std_private_tuple_make_tuple_types       [system] { header "__tuple/make_tuple_types.h" }
+module cxx03_std_private_tuple_tuple_like_no_subrange [system] {
   header "__tuple/tuple_like_no_subrange.h"
 }
-module std_private_tuple_sfinae_helpers         [system] { header "__tuple/sfinae_helpers.h" }
-module std_private_tuple_tuple_element          [system] { header "__tuple/tuple_element.h" }
-module std_private_tuple_tuple_fwd              [system] { header "__fwd/tuple.h" }
-module std_private_tuple_tuple_indices          [system] { header "__tuple/tuple_indices.h" }
-module std_private_tuple_tuple_like             [system] {
+module cxx03_std_private_tuple_sfinae_helpers         [system] { header "__tuple/sfinae_helpers.h" }
+module cxx03_std_private_tuple_tuple_element          [system] { header "__tuple/tuple_element.h" }
+module cxx03_std_private_tuple_tuple_fwd              [system] { header "__fwd/tuple.h" }
+module cxx03_std_private_tuple_tuple_indices          [system] { header "__tuple/tuple_indices.h" }
+module cxx03_std_private_tuple_tuple_like             [system] {
   header "__tuple/tuple_like.h"
   export *
 }
-module std_private_tuple_tuple_like_ext         [system] { header "__tuple/tuple_like_ext.h" }
-module std_private_tuple_tuple_size             [system] { header "__tuple/tuple_size.h" }
-module std_private_tuple_tuple_types            [system] { header "__tuple/tuple_types.h" }
+module cxx03_std_private_tuple_tuple_like_ext         [system] { header "__tuple/tuple_like_ext.h" }
+module cxx03_std_private_tuple_tuple_size             [system] { header "__tuple/tuple_size.h" }
+module cxx03_std_private_tuple_tuple_types            [system] { header "__tuple/tuple_types.h" }
 
-module std_private_type_traits_add_const                                 [system] { header "__type_traits/add_const.h" }
-module std_private_type_traits_add_cv                                    [system] { header "__type_traits/add_cv.h" }
-module std_private_type_traits_add_lvalue_reference                      [system] {
+module cxx03_std_private_type_traits_add_const                                 [system] { header "__type_traits/add_const.h" }
+module cxx03_std_private_type_traits_add_cv                                    [system] { header "__type_traits/add_cv.h" }
+module cxx03_std_private_type_traits_add_lvalue_reference                      [system] {
   header "__type_traits/add_lvalue_reference.h"
   export std_private_type_traits_is_referenceable
 }
-module std_private_type_traits_add_pointer                               [system] { header "__type_traits/add_pointer.h" }
-module std_private_type_traits_add_rvalue_reference                      [system] { header "__type_traits/add_rvalue_reference.h" }
-module std_private_type_traits_add_volatile                              [system] { header "__type_traits/add_volatile.h" }
-module std_private_type_traits_aligned_storage                           [system] { header "__type_traits/aligned_storage.h" }
-module std_private_type_traits_aligned_union                             [system] { header "__type_traits/aligned_union.h" }
-module std_private_type_traits_alignment_of                              [system] { header "__type_traits/alignment_of.h" }
-module std_private_type_traits_can_extract_key                           [system] { header "__type_traits/can_extract_key.h" }
-module std_private_type_traits_common_reference                          [system] {
+module cxx03_std_private_type_traits_add_pointer                               [system] { header "__type_traits/add_pointer.h" }
+module cxx03_std_private_type_traits_add_rvalue_reference                      [system] { header "__type_traits/add_rvalue_reference.h" }
+module cxx03_std_private_type_traits_add_volatile                              [system] { header "__type_traits/add_volatile.h" }
+module cxx03_std_private_type_traits_aligned_storage                           [system] { header "__type_traits/aligned_storage.h" }
+module cxx03_std_private_type_traits_aligned_union                             [system] { header "__type_traits/aligned_union.h" }
+module cxx03_std_private_type_traits_alignment_of                              [system] { header "__type_traits/alignment_of.h" }
+module cxx03_std_private_type_traits_can_extract_key                           [system] { header "__type_traits/can_extract_key.h" }
+module cxx03_std_private_type_traits_common_reference                          [system] {
   header "__type_traits/common_reference.h"
   export std_private_type_traits_remove_cvref
 }
-module std_private_type_traits_common_type                               [system] {
+module cxx03_std_private_type_traits_common_type                               [system] {
   header "__type_traits/common_type.h"
   export std_private_utility_declval
 }
-module std_private_type_traits_conditional                               [system] { header "__type_traits/conditional.h" }
-module std_private_type_traits_conjunction                               [system] { header "__type_traits/conjunction.h" }
-module std_private_type_traits_copy_cv                                   [system] { header "__type_traits/copy_cv.h" }
-module std_private_type_traits_copy_cvref                                [system] { header "__type_traits/copy_cvref.h" }
-module std_private_type_traits_datasizeof                                [system] { header "__type_traits/datasizeof.h" }
-module std_private_type_traits_decay                                     [system] {
+module cxx03_std_private_type_traits_conditional                               [system] { header "__type_traits/conditional.h" }
+module cxx03_std_private_type_traits_conjunction                               [system] { header "__type_traits/conjunction.h" }
+module cxx03_std_private_type_traits_copy_cv                                   [system] { header "__type_traits/copy_cv.h" }
+module cxx03_std_private_type_traits_copy_cvref                                [system] { header "__type_traits/copy_cvref.h" }
+module cxx03_std_private_type_traits_datasizeof                                [system] { header "__type_traits/datasizeof.h" }
+module cxx03_std_private_type_traits_decay                                     [system] {
   header "__type_traits/decay.h"
   export std_private_type_traits_add_pointer
 }
-module std_private_type_traits_dependent_type                            [system] { header "__type_traits/dependent_type.h" }
-module std_private_type_traits_desugars_to                               [system] { header "__type_traits/desugars_to.h" }
-module std_private_type_traits_disjunction                               [system] { header "__type_traits/disjunction.h" }
-module std_private_type_traits_enable_if                                 [system] { header "__type_traits/enable_if.h" }
-module std_private_type_traits_extent                                    [system] { header "__type_traits/extent.h" }
-module std_private_type_traits_has_unique_object_representation          [system] { header "__type_traits/has_unique_object_representation.h" }
-module std_private_type_traits_has_virtual_destructor                    [system] { header "__type_traits/has_virtual_destructor.h" }
-module std_private_type_traits_integral_constant                         [system] { header "__type_traits/integral_constant.h" }
-module std_private_type_traits_invoke                                    [system] {
+module cxx03_std_private_type_traits_dependent_type                            [system] { header "__type_traits/dependent_type.h" }
+module cxx03_std_private_type_traits_desugars_to                               [system] { header "__type_traits/desugars_to.h" }
+module cxx03_std_private_type_traits_disjunction                               [system] { header "__type_traits/disjunction.h" }
+module cxx03_std_private_type_traits_enable_if                                 [system] { header "__type_traits/enable_if.h" }
+module cxx03_std_private_type_traits_extent                                    [system] { header "__type_traits/extent.h" }
+module cxx03_std_private_type_traits_has_unique_object_representation          [system] { header "__type_traits/has_unique_object_representation.h" }
+module cxx03_std_private_type_traits_has_virtual_destructor                    [system] { header "__type_traits/has_virtual_destructor.h" }
+module cxx03_std_private_type_traits_integral_constant                         [system] { header "__type_traits/integral_constant.h" }
+module cxx03_std_private_type_traits_invoke                                    [system] {
   header "__type_traits/invoke.h"
   export std_private_type_traits_conditional
   export std_private_type_traits_decay
@@ -1917,194 +1917,194 @@
   export std_private_type_traits_nat
   export std_private_type_traits_remove_cv
 }
-module std_private_type_traits_is_abstract                               [system] { header "__type_traits/is_abstract.h" }
-module std_private_type_traits_is_aggregate                              [system] { header "__type_traits/is_aggregate.h" }
-module std_private_type_traits_is_allocator                              [system] { header "__type_traits/is_allocator.h" }
-module std_private_type_traits_is_always_bitcastable                     [system] { header "__type_traits/is_always_bitcastable.h" }
-module std_private_type_traits_is_arithmetic                             [system] {
+module cxx03_std_private_type_traits_is_abstract                               [system] { header "__type_traits/is_abstract.h" }
+module cxx03_std_private_type_traits_is_aggregate                              [system] { header "__type_traits/is_aggregate.h" }
+module cxx03_std_private_type_traits_is_allocator                              [system] { header "__type_traits/is_allocator.h" }
+module cxx03_std_private_type_traits_is_always_bitcastable                     [system] { header "__type_traits/is_always_bitcastable.h" }
+module cxx03_std_private_type_traits_is_arithmetic                             [system] {
   header "__type_traits/is_arithmetic.h"
   export std_private_type_traits_integral_constant
 }
-module std_private_type_traits_is_array                                  [system] {
+module cxx03_std_private_type_traits_is_array                                  [system] {
   header "__type_traits/is_array.h"
   export std_private_type_traits_integral_constant
 }
-module std_private_type_traits_is_assignable                             [system] { header "__type_traits/is_assignable.h" }
-module std_private_type_traits_is_base_of                                [system] { header "__type_traits/is_base_of.h" }
-module std_private_type_traits_is_bounded_array                          [system] { header "__type_traits/is_bounded_array.h" }
-module std_private_type_traits_is_callable                               [system] {
+module cxx03_std_private_type_traits_is_assignable                             [system] { header "__type_traits/is_assignable.h" }
+module cxx03_std_private_type_traits_is_base_of                                [system] { header "__type_traits/is_base_of.h" }
+module cxx03_std_private_type_traits_is_bounded_array                          [system] { header "__type_traits/is_bounded_array.h" }
+module cxx03_std_private_type_traits_is_callable                               [system] {
   header "__type_traits/is_callable.h"
   export std_private_type_traits_integral_constant
 }
-module std_private_type_traits_is_char_like_type                         [system] { header "__type_traits/is_char_like_type.h" }
-module std_private_type_traits_is_class                                  [system] { header "__type_traits/is_class.h" }
-module std_private_type_traits_is_compound                               [system] { header "__type_traits/is_compound.h" }
-module std_private_type_traits_is_const                                  [system] { header "__type_traits/is_const.h" }
-module std_private_type_traits_is_constant_evaluated                     [system] { header "__type_traits/is_constant_evaluated.h" }
-module std_private_type_traits_is_constructible                          [system] { header "__type_traits/is_constructible.h" }
-module std_private_type_traits_is_convertible                            [system] {
+module cxx03_std_private_type_traits_is_char_like_type                         [system] { header "__type_traits/is_char_like_type.h" }
+module cxx03_std_private_type_traits_is_class                                  [system] { header "__type_traits/is_class.h" }
+module cxx03_std_private_type_traits_is_compound                               [system] { header "__type_traits/is_compound.h" }
+module cxx03_std_private_type_traits_is_const                                  [system] { header "__type_traits/is_const.h" }
+module cxx03_std_private_type_traits_is_constant_evaluated                     [system] { header "__type_traits/is_constant_evaluated.h" }
+module cxx03_std_private_type_traits_is_constructible                          [system] { header "__type_traits/is_constructible.h" }
+module cxx03_std_private_type_traits_is_convertible                            [system] {
   header "__type_traits/is_convertible.h"
   export std_private_type_traits_is_array
 }
-module std_private_type_traits_is_copy_assignable                        [system] { header "__type_traits/is_copy_assignable.h" }
-module std_private_type_traits_is_copy_constructible                     [system] { header "__type_traits/is_copy_constructible.h" }
-module std_private_type_traits_is_core_convertible                       [system] {
+module cxx03_std_private_type_traits_is_copy_assignable                        [system] { header "__type_traits/is_copy_assignable.h" }
+module cxx03_std_private_type_traits_is_copy_constructible                     [system] { header "__type_traits/is_copy_constructible.h" }
+module cxx03_std_private_type_traits_is_core_convertible                       [system] {
   header "__type_traits/is_core_convertible.h"
   export std_private_type_traits_integral_constant
 }
-module std_private_type_traits_is_destructible                           [system] { header "__type_traits/is_destructible.h" }
-module std_private_type_traits_is_empty                                  [system] { header "__type_traits/is_empty.h" }
-module std_private_type_traits_is_enum                                   [system] {
+module cxx03_std_private_type_traits_is_destructible                           [system] { header "__type_traits/is_destructible.h" }
+module cxx03_std_private_type_traits_is_empty                                  [system] { header "__type_traits/is_empty.h" }
+module cxx03_std_private_type_traits_is_enum                                   [system] {
   header "__type_traits/is_enum.h"
   export std_private_type_traits_integral_constant
 }
-module std_private_type_traits_is_equality_comparable                    [system] {
+module cxx03_std_private_type_traits_is_equality_comparable                    [system] {
   header "__type_traits/is_equality_comparable.h"
   export std_private_type_traits_integral_constant
 }
-module std_private_type_traits_is_execution_policy                       [system] {
+module cxx03_std_private_type_traits_is_execution_policy                       [system] {
   header "__type_traits/is_execution_policy.h"
   export std_private_type_traits_remove_cvref
 }
-module std_private_type_traits_is_final                                  [system] { header "__type_traits/is_final.h" }
-module std_private_type_traits_is_floating_point                         [system] { header "__type_traits/is_floating_point.h" }
-module std_private_type_traits_is_function                               [system] { header "__type_traits/is_function.h" }
-module std_private_type_traits_is_fundamental                            [system] { header "__type_traits/is_fundamental.h" }
-module std_private_type_traits_is_implicitly_default_constructible       [system] {
+module cxx03_std_private_type_traits_is_final                                  [system] { header "__type_traits/is_final.h" }
+module cxx03_std_private_type_traits_is_floating_point                         [system] { header "__type_traits/is_floating_point.h" }
+module cxx03_std_private_type_traits_is_function                               [system] { header "__type_traits/is_function.h" }
+module cxx03_std_private_type_traits_is_fundamental                            [system] { header "__type_traits/is_fundamental.h" }
+module cxx03_std_private_type_traits_is_implicitly_default_constructible       [system] {
   header "__type_traits/is_implicitly_default_constructible.h"
   export std_private_type_traits_integral_constant
 }
-module std_private_type_traits_is_integral                               [system] { header "__type_traits/is_integral.h" }
-module std_private_type_traits_is_literal_type                           [system] { header "__type_traits/is_literal_type.h" }
-module std_private_type_traits_is_member_pointer                         [system] { header "__type_traits/is_member_pointer.h" }
-module std_private_type_traits_is_nothrow_assignable                     [system] { header "__type_traits/is_nothrow_assignable.h" }
-module std_private_type_traits_is_nothrow_constructible                  [system] {
+module cxx03_std_private_type_traits_is_integral                               [system] { header "__type_traits/is_integral.h" }
+module cxx03_std_private_type_traits_is_literal_type                           [system] { header "__type_traits/is_literal_type.h" }
+module cxx03_std_private_type_traits_is_member_pointer                         [system] { header "__type_traits/is_member_pointer.h" }
+module cxx03_std_private_type_traits_is_nothrow_assignable                     [system] { header "__type_traits/is_nothrow_assignable.h" }
+module cxx03_std_private_type_traits_is_nothrow_constructible                  [system] {
   header "__type_traits/is_nothrow_constructible.h"
   export std_private_type_traits_integral_constant
 }
-module std_private_type_traits_is_nothrow_convertible                    [system] { header "__type_traits/is_nothrow_convertible.h" }
-module std_private_type_traits_is_nothrow_destructible                   [system] {
+module cxx03_std_private_type_traits_is_nothrow_convertible                    [system] { header "__type_traits/is_nothrow_convertible.h" }
+module cxx03_std_private_type_traits_is_nothrow_destructible                   [system] {
   header "__type_traits/is_nothrow_destructible.h"
   export std_private_type_traits_is_destructible
 }
-module std_private_type_traits_is_null_pointer                           [system] {
+module cxx03_std_private_type_traits_is_null_pointer                           [system] {
   header "__type_traits/is_null_pointer.h"
   export std_cstddef
 }
-module std_private_type_traits_is_object                                 [system] {
+module cxx03_std_private_type_traits_is_object                                 [system] {
   header "__type_traits/is_object.h"
   export std_private_type_traits_is_scalar
 }
-module std_private_type_traits_is_pod                                    [system] { header "__type_traits/is_pod.h" }
-module std_private_type_traits_is_pointer                                [system] { header "__type_traits/is_pointer.h" }
-module std_private_type_traits_is_polymorphic                            [system] { header "__type_traits/is_polymorphic.h" }
-module std_private_type_traits_is_primary_template                       [system] {
+module cxx03_std_private_type_traits_is_pod                                    [system] { header "__type_traits/is_pod.h" }
+module cxx03_std_private_type_traits_is_pointer                                [system] { header "__type_traits/is_pointer.h" }
+module cxx03_std_private_type_traits_is_polymorphic                            [system] { header "__type_traits/is_polymorphic.h" }
+module cxx03_std_private_type_traits_is_primary_template                       [system] {
   header "__type_traits/is_primary_template.h"
   export std_private_type_traits_enable_if
 }
-module std_private_type_traits_is_reference                              [system] { header "__type_traits/is_reference.h" }
-module std_private_type_traits_is_reference_wrapper                      [system] { header "__type_traits/is_reference_wrapper.h" }
-module std_private_type_traits_is_referenceable                          [system] { header "__type_traits/is_referenceable.h" }
-module std_private_type_traits_is_same                                   [system] {
+module cxx03_std_private_type_traits_is_reference                              [system] { header "__type_traits/is_reference.h" }
+module cxx03_std_private_type_traits_is_reference_wrapper                      [system] { header "__type_traits/is_reference_wrapper.h" }
+module cxx03_std_private_type_traits_is_referenceable                          [system] { header "__type_traits/is_referenceable.h" }
+module cxx03_std_private_type_traits_is_same                                   [system] {
   header "__type_traits/is_same.h"
   export std_private_type_traits_integral_constant
 }
-module std_private_type_traits_is_scalar                                 [system] {
+module cxx03_std_private_type_traits_is_scalar                                 [system] {
   header "__type_traits/is_scalar.h"
   export std_private_type_traits_is_null_pointer
 }
-module std_private_type_traits_is_signed                                 [system] { header "__type_traits/is_signed.h" }
-module std_private_type_traits_is_signed_integer                         [system] { header "__type_traits/is_signed_integer.h" }
-module std_private_type_traits_is_specialization                         [system] { header "__type_traits/is_specialization.h" }
-module std_private_type_traits_is_standard_layout                        [system] { header "__type_traits/is_standard_layout.h" }
-module std_private_type_traits_is_swappable                              [system] {
+module cxx03_std_private_type_traits_is_signed                                 [system] { header "__type_traits/is_signed.h" }
+module cxx03_std_private_type_traits_is_signed_integer                         [system] { header "__type_traits/is_signed_integer.h" }
+module cxx03_std_private_type_traits_is_specialization                         [system] { header "__type_traits/is_specialization.h" }
+module cxx03_std_private_type_traits_is_standard_layout                        [system] { header "__type_traits/is_standard_layout.h" }
+module cxx03_std_private_type_traits_is_swappable                              [system] {
   header "__type_traits/is_swappable.h"
   export std_private_type_traits_is_move_constructible
 }
-module std_private_type_traits_is_trivial                                [system] { header "__type_traits/is_trivial.h" }
-module std_private_type_traits_is_trivially_assignable                   [system] { header "__type_traits/is_trivially_assignable.h" }
-module std_private_type_traits_is_trivially_constructible                [system] { header "__type_traits/is_trivially_constructible.h" }
-module std_private_type_traits_is_trivially_copyable                     [system] { header "__type_traits/is_trivially_copyable.h" }
-module std_private_type_traits_is_trivially_destructible                 [system] { header "__type_traits/is_trivially_destructible.h" }
-module std_private_type_traits_is_trivially_lexicographically_comparable [system] { header "__type_traits/is_trivially_lexicographically_comparable.h" }
-module std_private_type_traits_is_trivially_relocatable                  [system] { header "__type_traits/is_trivially_relocatable.h" }
-module std_private_type_traits_is_unbounded_array                        [system] { header "__type_traits/is_unbounded_array.h" }
-module std_private_type_traits_is_union                                  [system] { header "__type_traits/is_union.h" }
-module std_private_type_traits_is_unsigned                               [system] { header "__type_traits/is_unsigned.h" }
-module std_private_type_traits_is_unsigned_integer                       [system] { header "__type_traits/is_unsigned_integer.h" }
-module std_private_type_traits_is_valid_expansion                        [system] { header "__type_traits/is_valid_expansion.h" }
-module std_private_type_traits_is_void                                   [system] {
+module cxx03_std_private_type_traits_is_trivial                                [system] { header "__type_traits/is_trivial.h" }
+module cxx03_std_private_type_traits_is_trivially_assignable                   [system] { header "__type_traits/is_trivially_assignable.h" }
+module cxx03_std_private_type_traits_is_trivially_constructible                [system] { header "__type_traits/is_trivially_constructible.h" }
+module cxx03_std_private_type_traits_is_trivially_copyable                     [system] { header "__type_traits/is_trivially_copyable.h" }
+module cxx03_std_private_type_traits_is_trivially_destructible                 [system] { header "__type_traits/is_trivially_destructible.h" }
+module cxx03_std_private_type_traits_is_trivially_lexicographically_comparable [system] { header "__type_traits/is_trivially_lexicographically_comparable.h" }
+module cxx03_std_private_type_traits_is_trivially_relocatable                  [system] { header "__type_traits/is_trivially_relocatable.h" }
+module cxx03_std_private_type_traits_is_unbounded_array                        [system] { header "__type_traits/is_unbounded_array.h" }
+module cxx03_std_private_type_traits_is_union                                  [system] { header "__type_traits/is_union.h" }
+module cxx03_std_private_type_traits_is_unsigned                               [system] { header "__type_traits/is_unsigned.h" }
+module cxx03_std_private_type_traits_is_unsigned_integer                       [system] { header "__type_traits/is_unsigned_integer.h" }
+module cxx03_std_private_type_traits_is_valid_expansion                        [system] { header "__type_traits/is_valid_expansion.h" }
+module cxx03_std_private_type_traits_is_void                                   [system] {
   header "__type_traits/is_void.h"
   export std_private_type_traits_integral_constant
 }
-module std_private_type_traits_is_volatile                               [system] { header "__type_traits/is_volatile.h" }
-module std_private_type_traits_lazy                                      [system] { header "__type_traits/lazy.h" }
-module std_private_type_traits_make_32_64_or_128_bit                     [system] { header "__type_traits/make_32_64_or_128_bit.h" }
-module std_private_type_traits_make_const_lvalue_ref                     [system] { header "__type_traits/make_const_lvalue_ref.h" }
-module std_private_type_traits_make_signed                               [system] { header "__type_traits/make_signed.h" }
-module std_private_type_traits_make_unsigned                             [system] {
+module cxx03_std_private_type_traits_is_volatile                               [system] { header "__type_traits/is_volatile.h" }
+module cxx03_std_private_type_traits_lazy                                      [system] { header "__type_traits/lazy.h" }
+module cxx03_std_private_type_traits_make_32_64_or_128_bit                     [system] { header "__type_traits/make_32_64_or_128_bit.h" }
+module cxx03_std_private_type_traits_make_const_lvalue_ref                     [system] { header "__type_traits/make_const_lvalue_ref.h" }
+module cxx03_std_private_type_traits_make_signed                               [system] { header "__type_traits/make_signed.h" }
+module cxx03_std_private_type_traits_make_unsigned                             [system] {
   header "__type_traits/make_unsigned.h"
   export std_private_type_traits_is_unsigned
 }
-module std_private_type_traits_maybe_const                               [system] { header "__type_traits/maybe_const.h" }
-module std_private_type_traits_nat                                       [system] { header "__type_traits/nat.h" }
-module std_private_type_traits_negation                                  [system] { header "__type_traits/negation.h" }
-module std_private_type_traits_noexcept_move_assign_container            [system] { header "__type_traits/noexcept_move_assign_container.h" }
-module std_private_type_traits_promote                                   [system] { header "__type_traits/promote.h" }
-module std_private_type_traits_rank                                      [system] { header "__type_traits/rank.h" }
-module std_private_type_traits_remove_all_extents                        [system] { header "__type_traits/remove_all_extents.h" }
-module std_private_type_traits_remove_const                              [system] { header "__type_traits/remove_const.h" }
-module std_private_type_traits_remove_const_ref                          [system] { header "__type_traits/remove_const_ref.h" }
-module std_private_type_traits_remove_cv                                 [system] {
+module cxx03_std_private_type_traits_maybe_const                               [system] { header "__type_traits/maybe_const.h" }
+module cxx03_std_private_type_traits_nat                                       [system] { header "__type_traits/nat.h" }
+module cxx03_std_private_type_traits_negation                                  [system] { header "__type_traits/negation.h" }
+module cxx03_std_private_type_traits_noexcept_move_assign_container            [system] { header "__type_traits/noexcept_move_assign_container.h" }
+module cxx03_std_private_type_traits_promote                                   [system] { header "__type_traits/promote.h" }
+module cxx03_std_private_type_traits_rank                                      [system] { header "__type_traits/rank.h" }
+module cxx03_std_private_type_traits_remove_all_extents                        [system] { header "__type_traits/remove_all_extents.h" }
+module cxx03_std_private_type_traits_remove_const                              [system] { header "__type_traits/remove_const.h" }
+module cxx03_std_private_type_traits_remove_const_ref                          [system] { header "__type_traits/remove_const_ref.h" }
+module cxx03_std_private_type_traits_remove_cv                                 [system] {
   header "__type_traits/remove_cv.h"
   export std_private_type_traits_remove_const
   export std_private_type_traits_remove_volatile
 }
-module std_private_type_traits_remove_cvref                              [system] { header "__type_traits/remove_cvref.h" }
-module std_private_type_traits_remove_extent                             [system] { header "__type_traits/remove_extent.h" }
-module std_private_type_traits_remove_pointer                            [system] { header "__type_traits/remove_pointer.h" }
-module std_private_type_traits_remove_reference                          [system] { header "__type_traits/remove_reference.h" }
-module std_private_type_traits_remove_volatile                           [system] { header "__type_traits/remove_volatile.h" }
-module std_private_type_traits_result_of                                 [system] { header "__type_traits/result_of.h" }
-module std_private_type_traits_strip_signature                           [system] { header "__type_traits/strip_signature.h" }
-module std_private_type_traits_type_identity                             [system] { header "__type_traits/type_identity.h" }
-module std_private_type_traits_type_list                                 [system] { header "__type_traits/type_list.h" }
-module std_private_type_traits_underlying_type                           [system] {
+module cxx03_std_private_type_traits_remove_cvref                              [system] { header "__type_traits/remove_cvref.h" }
+module cxx03_std_private_type_traits_remove_extent                             [system] { header "__type_traits/remove_extent.h" }
+module cxx03_std_private_type_traits_remove_pointer                            [system] { header "__type_traits/remove_pointer.h" }
+module cxx03_std_private_type_traits_remove_reference                          [system] { header "__type_traits/remove_reference.h" }
+module cxx03_std_private_type_traits_remove_volatile                           [system] { header "__type_traits/remove_volatile.h" }
+module cxx03_std_private_type_traits_result_of                                 [system] { header "__type_traits/result_of.h" }
+module cxx03_std_private_type_traits_strip_signature                           [system] { header "__type_traits/strip_signature.h" }
+module cxx03_std_private_type_traits_type_identity                             [system] { header "__type_traits/type_identity.h" }
+module cxx03_std_private_type_traits_type_list                                 [system] { header "__type_traits/type_list.h" }
+module cxx03_std_private_type_traits_underlying_type                           [system] {
   header "__type_traits/underlying_type.h"
   export std_private_type_traits_is_enum
 }
-module std_private_type_traits_unwrap_ref                                [system] { header "__type_traits/unwrap_ref.h" }
-module std_private_type_traits_void_t                                    [system] { header "__type_traits/void_t.h" }
+module cxx03_std_private_type_traits_unwrap_ref                                [system] { header "__type_traits/unwrap_ref.h" }
+module cxx03_std_private_type_traits_void_t                                    [system] { header "__type_traits/void_t.h" }
 
-module std_private_utility_as_const               [system] { header "__utility/as_const.h" }
-module std_private_utility_as_lvalue              [system] { header "__utility/as_lvalue.h" }
-module std_private_utility_auto_cast              [system] {
+module cxx03_std_private_utility_as_const               [system] { header "__utility/as_const.h" }
+module cxx03_std_private_utility_as_lvalue              [system] { header "__utility/as_lvalue.h" }
+module cxx03_std_private_utility_auto_cast              [system] {
   header "__utility/auto_cast.h"
   export std_private_type_traits_decay
 }
-module std_private_utility_cmp                    [system] {
+module cxx03_std_private_utility_cmp                    [system] {
   header "__utility/cmp.h"
   export std_private_type_traits_make_unsigned
 }
-module std_private_utility_convert_to_integral    [system] { header "__utility/convert_to_integral.h" }
-module std_private_utility_declval                [system] { header "__utility/declval.h" }
-module std_private_utility_empty                  [system] { header "__utility/empty.h" }
-module std_private_utility_exception_guard        [system] { header "__utility/exception_guard.h" }
-module std_private_utility_exchange               [system] { header "__utility/exchange.h" }
-module std_private_utility_forward                [system] { header "__utility/forward.h" }
-module std_private_utility_forward_like           [system] { header "__utility/forward_like.h" }
-module std_private_utility_in_place               [system] { header "__utility/in_place.h" }
-module std_private_utility_integer_sequence       [system] { header "__utility/integer_sequence.h" }
-module std_private_utility_is_pointer_in_range    [system] { header "__utility/is_pointer_in_range.h" }
-module std_private_utility_is_valid_range         [system] { header "__utility/is_valid_range.h" }
-module std_private_utility_move                   [system] {
+module cxx03_std_private_utility_convert_to_integral    [system] { header "__utility/convert_to_integral.h" }
+module cxx03_std_private_utility_declval                [system] { header "__utility/declval.h" }
+module cxx03_std_private_utility_empty                  [system] { header "__utility/empty.h" }
+module cxx03_std_private_utility_exception_guard        [system] { header "__utility/exception_guard.h" }
+module cxx03_std_private_utility_exchange               [system] { header "__utility/exchange.h" }
+module cxx03_std_private_utility_forward                [system] { header "__utility/forward.h" }
+module cxx03_std_private_utility_forward_like           [system] { header "__utility/forward_like.h" }
+module cxx03_std_private_utility_in_place               [system] { header "__utility/in_place.h" }
+module cxx03_std_private_utility_integer_sequence       [system] { header "__utility/integer_sequence.h" }
+module cxx03_std_private_utility_is_pointer_in_range    [system] { header "__utility/is_pointer_in_range.h" }
+module cxx03_std_private_utility_is_valid_range         [system] { header "__utility/is_valid_range.h" }
+module cxx03_std_private_utility_move                   [system] {
   header "__utility/move.h"
   export std_private_type_traits_is_copy_constructible
   export std_private_type_traits_is_nothrow_move_constructible
   export std_private_type_traits_remove_reference
 }
-module std_private_utility_no_destroy             [system] { header "__utility/no_destroy.h" }
-module std_private_utility_pair                   [system] {
+module cxx03_std_private_utility_no_destroy             [system] { header "__utility/no_destroy.h" }
+module cxx03_std_private_utility_pair                   [system] {
   header "__utility/pair.h"
   export std_private_ranges_subrange_fwd
   export std_private_tuple_pair_like
@@ -2118,19 +2118,19 @@
   export std_private_type_traits_is_nothrow_move_assignable
   export std_private_utility_pair_fwd
 }
-module std_private_utility_pair_fwd                [system] { header "__fwd/pair.h" }
-module std_private_utility_piecewise_construct     [system] { header "__utility/piecewise_construct.h" }
-module std_private_utility_priority_tag            [system] { header "__utility/priority_tag.h" }
-module std_private_utility_private_constructor_tag [system] { header "__utility/private_constructor_tag.h" }
-module std_private_utility_rel_ops                 [system] { header "__utility/rel_ops.h" }
-module std_private_utility_small_buffer            [system] { header "__utility/small_buffer.h" }
-module std_private_utility_swap                    [system] {
+module cxx03_std_private_utility_pair_fwd                [system] { header "__fwd/pair.h" }
+module cxx03_std_private_utility_piecewise_construct     [system] { header "__utility/piecewise_construct.h" }
+module cxx03_std_private_utility_priority_tag            [system] { header "__utility/priority_tag.h" }
+module cxx03_std_private_utility_private_constructor_tag [system] { header "__utility/private_constructor_tag.h" }
+module cxx03_std_private_utility_rel_ops                 [system] { header "__utility/rel_ops.h" }
+module cxx03_std_private_utility_small_buffer            [system] { header "__utility/small_buffer.h" }
+module cxx03_std_private_utility_swap                    [system] {
   header "__utility/swap.h"
   export std_private_type_traits_is_swappable
 }
-module std_private_utility_to_underlying           [system] { header "__utility/to_underlying.h" }
-module std_private_utility_unreachable             [system] { header "__utility/unreachable.h" }
+module cxx03_std_private_utility_to_underlying           [system] { header "__utility/to_underlying.h" }
+module cxx03_std_private_utility_unreachable             [system] { header "__utility/unreachable.h" }
 
-module std_private_variant_monostate               [system] { header "__variant/monostate.h" }
+module cxx03_std_private_variant_monostate               [system] { header "__variant/monostate.h" }
 
-module std_private_vector_fwd                      [system] { header "__fwd/vector.h" }
+module cxx03_std_private_vector_fwd                      [system] { header "__fwd/vector.h" }
diff --git a/include/__cxx03/version b/include/__cxx03/version
index dd0fe4b..ed1857d 100644
--- a/include/__cxx03/version
+++ b/include/__cxx03/version
@@ -7,8 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef _LIBCPP_VERSIONH
-#define _LIBCPP_VERSIONH
+#ifndef _LIBCPP___CXX03_VERSIONH
+#define _LIBCPP___CXX03_VERSIONH
 
 /*
   version synopsis
@@ -563,4 +563,4 @@
 
 // clang-format on
 
-#endif // _LIBCPP_VERSIONH
+#endif // _LIBCPP___CXX03_VERSIONH
diff --git a/include/algorithm b/include/algorithm
index 080fca8..e593ae2 100644
--- a/include/algorithm
+++ b/include/algorithm
@@ -1827,8 +1827,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/algorithm>
+#else
 #  include <__config>
 
 #  include <__algorithm/adjacent_find.h>
@@ -2056,6 +2057,6 @@
 #    include <type_traits>
 #    include <utility>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_ALGORITHM
diff --git a/include/any b/include/any
index c8658a4..934c4db 100644
--- a/include/any
+++ b/include/any
@@ -80,8 +80,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/any>
+#else
 #  include <__config>
 #  include <__memory/allocator.h>
 #  include <__memory/allocator_destructor.h>
@@ -611,6 +612,6 @@
 #    include <type_traits>
 #    include <variant>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_ANY
diff --git a/include/array b/include/array
index 7aed70f..516d965 100644
--- a/include/array
+++ b/include/array
@@ -111,8 +111,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/array>
+#else
 #  include <__algorithm/equal.h>
 #  include <__algorithm/fill_n.h>
 #  include <__algorithm/lexicographical_compare.h>
@@ -567,6 +568,6 @@
 #    include <type_traits>
 #    include <utility>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_ARRAY
diff --git a/include/atomic b/include/atomic
index 64635d0..80f9e43 100644
--- a/include/atomic
+++ b/include/atomic
@@ -587,8 +587,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/atomic>
+#else
 #  include <__config>
 
 #  include <__atomic/aliases.h>
@@ -625,6 +626,6 @@
 #    include <cstring>
 #    include <type_traits>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_ATOMIC
diff --git a/include/barrier b/include/barrier
index 705cb7d..6861532 100644
--- a/include/barrier
+++ b/include/barrier
@@ -45,8 +45,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/barrier>
+#else
 #  include <__config>
 
 #  if _LIBCPP_HAS_THREADS
@@ -306,6 +307,6 @@
 #    include <stdexcept>
 #    include <variant>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_BARRIER
diff --git a/include/bit b/include/bit
index a5a317e..3fea10b 100644
--- a/include/bit
+++ b/include/bit
@@ -61,8 +61,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/bit>
+#else
 #  include <__config>
 
 #  if _LIBCPP_STD_VER >= 20
@@ -95,6 +96,6 @@
 #    include <limits>
 #    include <type_traits>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_BIT
diff --git a/include/bitset b/include/bitset
index e2dc7b4..8b36182 100644
--- a/include/bitset
+++ b/include/bitset
@@ -126,8 +126,9 @@
 
 // clang-format on
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/bitset>
+#else
 #  include <__algorithm/count.h>
 #  include <__algorithm/fill.h>
 #  include <__algorithm/fill_n.h>
@@ -971,6 +972,6 @@
 #    include <cstdlib>
 #    include <type_traits>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_BITSET
diff --git a/include/cassert b/include/cassert
index 18e6e29..9d3cd77 100644
--- a/include/cassert
+++ b/include/cassert
@@ -16,8 +16,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/cassert>
+#else
 #  include <__config>
 
 // <assert.h> is not provided by libc++
@@ -31,4 +32,4 @@
 #  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #    pragma GCC system_header
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
diff --git a/include/ccomplex b/include/ccomplex
index bd5a811..10eb8a3 100644
--- a/include/ccomplex
+++ b/include/ccomplex
@@ -17,8 +17,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/ccomplex>
+#else
 #  include <complex>
 
 #  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
@@ -36,6 +37,6 @@
 using __use_standard_header_ccomplex                                               = __standard_header_ccomplex;
 
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_CCOMPLEX
diff --git a/include/cctype b/include/cctype
index ee3002b..abe0ec4 100644
--- a/include/cctype
+++ b/include/cctype
@@ -34,8 +34,9 @@
 }  // std
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/cctype>
+#else
 #  include <__config>
 
 #  include <ctype.h>
@@ -125,6 +126,6 @@
 using ::toupper _LIBCPP_USING_IF_EXISTS;
 
 _LIBCPP_END_NAMESPACE_STD
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_CCTYPE
diff --git a/include/cerrno b/include/cerrno
index 63017d0..15925d4 100644
--- a/include/cerrno
+++ b/include/cerrno
@@ -22,8 +22,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/cerrno>
+#else
 #  include <__config>
 
 #  include <errno.h>
@@ -46,6 +47,6 @@
 // deprecated in libc++ in https://github.com/llvm/llvm-project/pull/80542.
 // Based on the post commit feedback the macro are no longer deprecated.
 // Instead libc++ leaves the deprecation to the provider of errno.h.
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_CERRNO
diff --git a/include/cfenv b/include/cfenv
index 47ed700..d7ea770 100644
--- a/include/cfenv
+++ b/include/cfenv
@@ -52,8 +52,9 @@
 }  // std
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/cfenv>
+#else
 #  include <__config>
 
 #  include <fenv.h>
@@ -86,8 +87,9 @@
 using ::feholdexcept _LIBCPP_USING_IF_EXISTS;
 using ::fesetenv _LIBCPP_USING_IF_EXISTS;
 using ::feupdateenv _LIBCPP_USING_IF_EXISTS;
-#endif // 0
 
 _LIBCPP_END_NAMESPACE_STD
 
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+
 #endif // _LIBCPP_CFENV
diff --git a/include/cfloat b/include/cfloat
index fc37f58..18b4afd 100644
--- a/include/cfloat
+++ b/include/cfloat
@@ -69,8 +69,9 @@
     LDBL_TRUE_MIN       // C11
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/cfloat>
+#else
 #  include <__config>
 
 #  include <float.h>
@@ -86,6 +87,6 @@
 #  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #    pragma GCC system_header
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_CFLOAT
diff --git a/include/charconv b/include/charconv
index 258779a..3526bb9 100644
--- a/include/charconv
+++ b/include/charconv
@@ -75,8 +75,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/charconv>
+#else
 #  include <__config>
 
 #  if _LIBCPP_STD_VER >= 17
@@ -115,6 +116,6 @@
 #    include <new>
 #    include <type_traits>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_CHARCONV
diff --git a/include/chrono b/include/chrono
index 6654a67..d9a8afe 100644
--- a/include/chrono
+++ b/include/chrono
@@ -939,8 +939,9 @@
 
 // clang-format on
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/chrono>
+#else
 #  include <__config>
 
 #  include <__chrono/duration.h>
@@ -1019,6 +1020,6 @@
 #      include <ostream>
 #    endif
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_CHRONO
diff --git a/include/cinttypes b/include/cinttypes
index 053067d..4c7e2c5 100644
--- a/include/cinttypes
+++ b/include/cinttypes
@@ -234,8 +234,9 @@
 }  // std
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/cinttypes>
+#else
 #  include <__config>
 
 // standard-mandated includes
@@ -269,6 +270,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_CINTTYPES
diff --git a/include/ciso646 b/include/ciso646
index 965b787..5b95640 100644
--- a/include/ciso646
+++ b/include/ciso646
@@ -15,8 +15,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/ciso646>
+#else
 #  include <__config>
 
 #  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
@@ -29,6 +30,6 @@
 using __use_standard_header_ciso646 = __standard_header_ciso646;
 
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_CISO646
diff --git a/include/climits b/include/climits
index b31f77d..a051d96 100644
--- a/include/climits
+++ b/include/climits
@@ -37,8 +37,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/climits>
+#else
 #  include <__config>
 
 #  include <limits.h>
@@ -47,6 +48,6 @@
 #    pragma GCC system_header
 #  endif
 
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_CLIMITS
diff --git a/include/clocale b/include/clocale
index 4199487..9ca82fa 100644
--- a/include/clocale
+++ b/include/clocale
@@ -34,8 +34,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/clocale>
+#else
 #  include <__config>
 
 #  if __has_include(<locale.h>)
@@ -54,6 +55,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_CLOCALE
diff --git a/include/cmath b/include/cmath
index ff8e7e1..9cf044d 100644
--- a/include/cmath
+++ b/include/cmath
@@ -312,8 +312,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/cmath>
+#else
 #  include <__config>
 #  include <__math/hypot.h>
 #  include <__type_traits/enable_if.h>
@@ -616,6 +617,6 @@
 #  if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
 #    include <type_traits>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_CMATH
diff --git a/include/codecvt b/include/codecvt
index ce6d995..f7ae804 100644
--- a/include/codecvt
+++ b/include/codecvt
@@ -54,8 +54,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/codecvt>
+#else
 #  include <__config>
 #  include <__locale>
 #  include <version>
@@ -595,6 +596,6 @@
 #    include <type_traits>
 #    include <typeinfo>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_CODECVT
diff --git a/include/compare b/include/compare
index 97871e6..0c19a5b 100644
--- a/include/compare
+++ b/include/compare
@@ -140,8 +140,9 @@
 }
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/compare>
+#else
 #  include <__config>
 
 #  if _LIBCPP_STD_VER >= 20
@@ -171,6 +172,6 @@
 #    include <cstddef>
 #    include <type_traits>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_COMPARE
diff --git a/include/complex b/include/complex
index bfc27bb..bc73f31 100644
--- a/include/complex
+++ b/include/complex
@@ -256,8 +256,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/complex>
+#else
 #  include <__config>
 #  include <__fwd/complex.h>
 #  include <__fwd/tuple.h>
@@ -1476,6 +1477,6 @@
 #    include <stdexcept>
 #    include <type_traits>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_COMPLEX
diff --git a/include/complex.h b/include/complex.h
index 5bc7ab4..8a1f926 100644
--- a/include/complex.h
+++ b/include/complex.h
@@ -17,8 +17,9 @@
 
 */
 
-#if 0
-#else // 0
+#if defined(__cplusplus) && __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/complex.h>
+#else
 #  include <__config>
 
 #  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
@@ -30,6 +31,6 @@
 #  elif __has_include_next(<complex.h>)
 #    include_next <complex.h>
 #  endif
-#endif // 0
+#endif // defined(__cplusplus) && __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_COMPLEX_H
diff --git a/include/concepts b/include/concepts
index 2fe5400..ff3fd15 100644
--- a/include/concepts
+++ b/include/concepts
@@ -129,8 +129,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/concepts>
+#else
 #  include <__config>
 
 #  if _LIBCPP_STD_VER >= 20
@@ -168,6 +169,6 @@
 #  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #    pragma GCC system_header
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_CONCEPTS
diff --git a/include/condition_variable b/include/condition_variable
index f351f13..81699bf 100644
--- a/include/condition_variable
+++ b/include/condition_variable
@@ -118,8 +118,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/condition_variable>
+#else
 #  include <__chrono/duration.h>
 #  include <__chrono/steady_clock.h>
 #  include <__chrono/time_point.h>
@@ -367,6 +368,6 @@
 #    include <type_traits>
 #    include <typeinfo>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_CONDITION_VARIABLE
diff --git a/include/coroutine b/include/coroutine
index c39aa9a..d745844 100644
--- a/include/coroutine
+++ b/include/coroutine
@@ -38,8 +38,9 @@
 
  */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/coroutine>
+#else
 #  include <__config>
 
 #  if _LIBCPP_STD_VER >= 20
@@ -66,6 +67,6 @@
 #    include <limits>
 #    include <type_traits>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_COROUTINE
diff --git a/include/csetjmp b/include/csetjmp
index bd51272..39ab035 100644
--- a/include/csetjmp
+++ b/include/csetjmp
@@ -30,8 +30,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/csetjmp>
+#else
 #  include <__config>
 
 // <setjmp.h> is not provided by libc++
@@ -53,6 +54,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_CSETJMP
diff --git a/include/csignal b/include/csignal
index 92edf08..a15d17d 100644
--- a/include/csignal
+++ b/include/csignal
@@ -39,8 +39,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/csignal>
+#else
 #  include <__config>
 
 // <signal.h> is not provided by libc++
@@ -63,6 +64,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_CSIGNAL
diff --git a/include/cstdalign b/include/cstdalign
index ab78344..6a277e4 100644
--- a/include/cstdalign
+++ b/include/cstdalign
@@ -20,8 +20,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/__config>
+#else
 #  include <__config>
 
 // <stdalign.h> is not provided by libc++
@@ -53,6 +54,6 @@
 using __use_standard_header_cstdalign                = __standard_header_cstdalign;
 
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_CSTDALIGN
diff --git a/include/cstdarg b/include/cstdarg
index 1930fc9..069fe10 100644
--- a/include/cstdarg
+++ b/include/cstdarg
@@ -31,8 +31,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/cstdarg>
+#else
 #  include <__config>
 
 // <stdarg.h> is not provided by libc++
@@ -53,6 +54,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_CSTDARG
diff --git a/include/cstdbool b/include/cstdbool
index a436c5c..a12954f 100644
--- a/include/cstdbool
+++ b/include/cstdbool
@@ -19,8 +19,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/cstdbool>
+#else
 #  include <__config>
 
 #  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
@@ -41,6 +42,6 @@
 using __use_standard_header_cstdbool                = __standard_header_cstdbool;
 
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_CSTDBOOL
diff --git a/include/cstddef b/include/cstddef
index 2e79d05..d86d87b 100644
--- a/include/cstddef
+++ b/include/cstddef
@@ -33,8 +33,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/cstddef>
+#else
 #  include <__config>
 #  include <version>
 
@@ -57,6 +58,6 @@
 #  include <__cstddef/nullptr_t.h>
 #  include <__cstddef/ptrdiff_t.h>
 #  include <__cstddef/size_t.h>
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_CSTDDEF
diff --git a/include/cstdint b/include/cstdint
index 5944789..11839ee 100644
--- a/include/cstdint
+++ b/include/cstdint
@@ -140,8 +140,9 @@
 }  // std
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/cstdint>
+#else
 #  include <__config>
 
 #  if __has_include(<stdint.h>)
@@ -192,6 +193,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_CSTDINT
diff --git a/include/cstdio b/include/cstdio
index 1b1a05d..df9da1b 100644
--- a/include/cstdio
+++ b/include/cstdio
@@ -95,8 +95,9 @@
 }  // std
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/cstdio>
+#else
 #  include <__config>
 #  include <__cstddef/size_t.h>
 
@@ -173,6 +174,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_CSTDIO
diff --git a/include/cstdlib b/include/cstdlib
index 03e6895..adeee29 100644
--- a/include/cstdlib
+++ b/include/cstdlib
@@ -81,8 +81,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/cstdlib>
+#else
 #  include <__config>
 #  include <__cstddef/size_t.h>
 
@@ -153,6 +154,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_CSTDLIB
diff --git a/include/cstring b/include/cstring
index f414885..4aa14fe 100644
--- a/include/cstring
+++ b/include/cstring
@@ -56,8 +56,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/cstring>
+#else
 #  include <__config>
 #  include <__cstddef/size_t.h>
 #  include <__type_traits/is_constant_evaluated.h>
@@ -103,6 +104,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_CSTRING
diff --git a/include/ctgmath b/include/ctgmath
index d8bb640..237f474 100644
--- a/include/ctgmath
+++ b/include/ctgmath
@@ -18,8 +18,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/ctgmath>
+#else
 #  include <cmath>
 #  include <complex>
 
@@ -39,6 +40,6 @@
 
 #  endif
 
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_CTGMATH
diff --git a/include/ctime b/include/ctime
index 6c5b016..1e845a8 100644
--- a/include/ctime
+++ b/include/ctime
@@ -45,8 +45,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/ctime>
+#else
 #  include <__config>
 #  include <__cstddef/size_t.h>
 
@@ -85,6 +86,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_CTIME
diff --git a/include/ctype.h b/include/ctype.h
index 611f940..066f450 100644
--- a/include/ctype.h
+++ b/include/ctype.h
@@ -29,8 +29,9 @@
 int toupper(int c);
 */
 
-#if 0
-#else // 0
+#if defined(__cplusplus) && __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/ctype.h>
+#else
 #  include <__config>
 
 #  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
@@ -59,6 +60,6 @@
 #    undef toupper
 
 #  endif
-#endif // 0
+#endif // defined(__cplusplus) && __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_CTYPE_H
diff --git a/include/cuchar b/include/cuchar
index 3ace72f..38505eb 100644
--- a/include/cuchar
+++ b/include/cuchar
@@ -36,8 +36,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/cuchar>
+#else
 #  include <__config>
 #  include <__cstddef/size_t.h>
 
@@ -71,8 +72,9 @@
 using ::c32rtomb _LIBCPP_USING_IF_EXISTS;
 
 #  endif // _LIBCPP_CXX03_LANG
-#endif   // 0
 
 _LIBCPP_END_NAMESPACE_STD
 
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+
 #endif // _LIBCPP_CUCHAR
diff --git a/include/cwchar b/include/cwchar
index f97d9c4..4a4b052 100644
--- a/include/cwchar
+++ b/include/cwchar
@@ -102,8 +102,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/cwchar>
+#else
 #  include <__config>
 #  include <__cstddef/size_t.h>
 #  include <__type_traits/copy_cv.h>
@@ -259,6 +260,6 @@
 #  if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
 #    include <cstddef>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_CWCHAR
diff --git a/include/cwctype b/include/cwctype
index 848aadd..b7f9cbb 100644
--- a/include/cwctype
+++ b/include/cwctype
@@ -49,8 +49,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/cwctype>
+#else
 #  include <__config>
 #  include <cctype>
 
@@ -96,6 +97,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_CWCTYPE
diff --git a/include/deque b/include/deque
index 63eb836..883332f 100644
--- a/include/deque
+++ b/include/deque
@@ -177,8 +177,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/deque>
+#else
 #  include <__algorithm/copy.h>
 #  include <__algorithm/copy_backward.h>
 #  include <__algorithm/copy_n.h>
@@ -2648,6 +2649,6 @@
 #    include <type_traits>
 #    include <typeinfo>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_DEQUE
diff --git a/include/errno.h b/include/errno.h
index 648d22e..692f00f 100644
--- a/include/errno.h
+++ b/include/errno.h
@@ -22,8 +22,9 @@
 
 */
 
-#if 0
-#else // 0
+#if defined(__cplusplus) && __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/errno.h>
+#else
 #  include <__config>
 
 #  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
@@ -397,6 +398,6 @@
 #    endif
 
 #  endif // __cplusplus
-#endif   // 0
+#endif   // defined(__cplusplus) && __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_ERRNO_H
diff --git a/include/exception b/include/exception
index 6565f1b..74229cd 100644
--- a/include/exception
+++ b/include/exception
@@ -76,8 +76,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/exception>
+#else
 #  include <__config>
 #  include <__exception/exception.h>
 #  include <__exception/exception_ptr.h>
@@ -96,6 +97,6 @@
 #    include <new>
 #    include <type_traits>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_EXCEPTION
diff --git a/include/execution b/include/execution
index e8ef8b1..7c69599 100644
--- a/include/execution
+++ b/include/execution
@@ -32,8 +32,9 @@
 }
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/execution>
+#else
 #  include <__config>
 #  include <__type_traits/is_execution_policy.h>
 #  include <__type_traits/is_same.h>
@@ -147,6 +148,6 @@
 #  if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
 #    include <cstddef>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_EXECUTION
diff --git a/include/expected b/include/expected
index ac2415f..38038d3 100644
--- a/include/expected
+++ b/include/expected
@@ -38,8 +38,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/expected>
+#else
 #  include <__config>
 
 #  if _LIBCPP_STD_VER >= 23
@@ -54,6 +55,6 @@
 #  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #    pragma GCC system_header
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_EXPECTED
diff --git a/include/experimental/iterator b/include/experimental/iterator
index 5075de5..8448654 100644
--- a/include/experimental/iterator
+++ b/include/experimental/iterator
@@ -52,8 +52,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/experimental/iterator>
+#else
 #  include <__config>
 #  include <__memory/addressof.h>
 #  include <__ostream/basic_ostream.h>
@@ -128,6 +129,6 @@
 #    include <iosfwd>
 #    include <type_traits>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_EXPERIMENTAL_ITERATOR
diff --git a/include/experimental/memory b/include/experimental/memory
index cb02ecb..1daa1cc 100644
--- a/include/experimental/memory
+++ b/include/experimental/memory
@@ -49,8 +49,9 @@
 }
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/experimental/memory>
+#else
 #  include <__config>
 #  include <__cstddef/nullptr_t.h>
 #  include <__cstddef/size_t.h>
@@ -199,6 +200,6 @@
 #    include <cstddef>
 #    include <limits>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif /* _LIBCPP_EXPERIMENTAL_MEMORY */
diff --git a/include/experimental/propagate_const b/include/experimental/propagate_const
index 4d06e9f..8af3be3 100644
--- a/include/experimental/propagate_const
+++ b/include/experimental/propagate_const
@@ -107,8 +107,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/experimental/propagate_const>
+#else
 #  include <__config>
 #  include <__cstddef/nullptr_t.h>
 #  include <__cstddef/size_t.h>
@@ -491,6 +492,6 @@
 #    include <cstddef>
 #    include <type_traits>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_EXPERIMENTAL_PROPAGATE_CONST
diff --git a/include/experimental/simd b/include/experimental/simd
index 374ab57..224cc75 100644
--- a/include/experimental/simd
+++ b/include/experimental/simd
@@ -75,8 +75,9 @@
 #  pragma GCC system_header
 #endif
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/experimental/simd>
+#else
 #  include <__config>
 #  include <experimental/__simd/aligned_tag.h>
 #  include <experimental/__simd/declaration.h>
@@ -90,6 +91,6 @@
 #  if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
 #    include <cstddef>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif /* _LIBCPP_EXPERIMENTAL_SIMD */
diff --git a/include/experimental/type_traits b/include/experimental/type_traits
index 0da95b7..0353526 100644
--- a/include/experimental/type_traits
+++ b/include/experimental/type_traits
@@ -68,8 +68,9 @@
 
  */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/experimental/type_traits>
+#else
 #  include <__config>
 
 #  if _LIBCPP_STD_VER >= 14
@@ -155,6 +156,6 @@
 #    endif
 
 #  endif /* _LIBCPP_STD_VER >= 14 */
-#endif   // 0
+#endif   // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif /* _LIBCPP_EXPERIMENTAL_TYPE_TRAITS */
diff --git a/include/experimental/utility b/include/experimental/utility
index 1cb9c6a..0c9b2b0 100644
--- a/include/experimental/utility
+++ b/include/experimental/utility
@@ -30,8 +30,9 @@
 
  */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/experimental/utility>
+#else
 #  include <__config>
 #  include <utility>
 
@@ -48,6 +49,6 @@
 #  if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
 #    include <cstddef>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif /* _LIBCPP_EXPERIMENTAL_UTILITY */
diff --git a/include/ext/hash_map b/include/ext/hash_map
index c9e3547..c033662 100644
--- a/include/ext/hash_map
+++ b/include/ext/hash_map
@@ -201,8 +201,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/ext/hash_map>
+#else
 #  include <__config>
 #  include <__hash_table>
 #  include <algorithm>
@@ -870,6 +871,6 @@
 #    include <iterator>
 #    include <type_traits>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_HASH_MAP
diff --git a/include/ext/hash_set b/include/ext/hash_set
index 073fcf2..2f86649 100644
--- a/include/ext/hash_set
+++ b/include/ext/hash_set
@@ -192,8 +192,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/ext/hash_set>
+#else
 #  include <__config>
 #  include <__hash_table>
 #  include <algorithm>
@@ -582,6 +583,6 @@
 #    include <iterator>
 #    include <type_traits>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_HASH_SET
diff --git a/include/fenv.h b/include/fenv.h
index dddf59d..157c24f 100644
--- a/include/fenv.h
+++ b/include/fenv.h
@@ -49,8 +49,9 @@
 
 */
 
-#if 0
-#else // 0
+#if defined(__cplusplus) && __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/fenv.h>
+#else
 #  include <__config>
 
 #  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
@@ -112,6 +113,6 @@
 } // extern "C++"
 
 #  endif // defined(__cplusplus)
-#endif   // 0
+#endif   // defined(__cplusplus) && __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_FENV_H
diff --git a/include/filesystem b/include/filesystem
index f6f5dcb..f9eb0ea 100644
--- a/include/filesystem
+++ b/include/filesystem
@@ -533,8 +533,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/filesystem>
+#else
 #  include <__config>
 
 #  if _LIBCPP_STD_VER >= 17
@@ -575,6 +576,6 @@
 #    include <new>
 #    include <system_error>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_FILESYSTEM
diff --git a/include/flat_map b/include/flat_map
index 1f2c204..dbe5d8e 100644
--- a/include/flat_map
+++ b/include/flat_map
@@ -37,8 +37,9 @@
       erase_if(flat_map<Key, T, Compare, KeyContainer, MappedContainer>& c, Predicate pred);
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/__config>
+#else
 #  include <__config>
 
 #  if _LIBCPP_STD_VER >= 23
@@ -56,6 +57,6 @@
 #  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #    pragma GCC system_header
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_FLAT_MAP
diff --git a/include/float.h b/include/float.h
index 2874323..a6e79db 100644
--- a/include/float.h
+++ b/include/float.h
@@ -70,8 +70,9 @@
 
 */
 
-#if 0
-#else // 0
+#if defined(__cplusplus) && __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/float.h>
+#else
 #  include <__config>
 
 #  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
@@ -93,6 +94,6 @@
 #    endif
 
 #  endif // __cplusplus
-#endif   // 0
+#endif   // defined(__cplusplus) && __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_FLOAT_H
diff --git a/include/format b/include/format
index 6ac1e92..ecf8f7c 100644
--- a/include/format
+++ b/include/format
@@ -191,8 +191,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/format>
+#else
 #  include <__config>
 
 #  if _LIBCPP_STD_VER >= 20
@@ -258,6 +259,6 @@
 #      include <cwchar>
 #    endif
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_FORMAT
diff --git a/include/forward_list b/include/forward_list
index 23e8e51..c1ab155 100644
--- a/include/forward_list
+++ b/include/forward_list
@@ -195,8 +195,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/forward_list>
+#else
 #  include <__algorithm/comp.h>
 #  include <__algorithm/lexicographical_compare.h>
 #  include <__algorithm/lexicographical_compare_three_way.h>
@@ -1586,6 +1587,6 @@
 #    include <type_traits>
 #    include <typeinfo>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_FORWARD_LIST
diff --git a/include/fstream b/include/fstream
index 9722440..f0e9425 100644
--- a/include/fstream
+++ b/include/fstream
@@ -186,8 +186,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/fstream>
+#else
 #  include <__algorithm/max.h>
 #  include <__assert>
 #  include <__config>
@@ -1585,6 +1586,6 @@
 #  if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 23
 #    include <filesystem>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_FSTREAM
diff --git a/include/functional b/include/functional
index 69f7131..4bb163f 100644
--- a/include/functional
+++ b/include/functional
@@ -527,8 +527,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/functional>
+#else
 #  include <__config>
 
 #  include <__functional/binary_function.h>
@@ -596,6 +597,6 @@
 #    include <utility>
 #    include <vector>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_FUNCTIONAL
diff --git a/include/future b/include/future
index 3a612d8..95a51fa 100644
--- a/include/future
+++ b/include/future
@@ -362,8 +362,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/future>
+#else
 #  include <__config>
 
 #  if _LIBCPP_HAS_THREADS
@@ -2084,6 +2085,6 @@
 #    include <system_error>
 #    include <thread>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_FUTURE
diff --git a/include/initializer_list b/include/initializer_list
index 46ffb95..07c51f3 100644
--- a/include/initializer_list
+++ b/include/initializer_list
@@ -42,8 +42,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/initializer_list>
+#else
 #  include <__config>
 #  include <__cstddef/size_t.h>
 #  include <version>
@@ -101,6 +102,6 @@
 #  if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
 #    include <cstddef>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_INITIALIZER_LIST
diff --git a/include/inttypes.h b/include/inttypes.h
index 5523245..1869284 100644
--- a/include/inttypes.h
+++ b/include/inttypes.h
@@ -235,8 +235,9 @@
 
 */
 
-#if 0
-#else // 0
+#if defined(__cplusplus) && __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/inttypes.h>
+#else
 #  include <__config>
 
 #  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
@@ -262,6 +263,6 @@
 #    undef imaxdiv
 
 #  endif // __cplusplus
-#endif   // 0
+#endif   // defined(__cplusplus) && __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_INTTYPES_H
diff --git a/include/iomanip b/include/iomanip
index 84842dc..a97b4a9 100644
--- a/include/iomanip
+++ b/include/iomanip
@@ -42,8 +42,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/iomanip>
+#else
 #  include <__config>
 
 #  if _LIBCPP_HAS_LOCALIZATION
@@ -563,6 +564,6 @@
 #    include <unordered_map>
 #    include <vector>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_IOMANIP
diff --git a/include/ios b/include/ios
index 23e8fdf..7c2ee83 100644
--- a/include/ios
+++ b/include/ios
@@ -211,8 +211,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/ios>
+#else
 #  include <__config>
 
 #  if _LIBCPP_HAS_LOCALIZATION
@@ -891,6 +892,6 @@
 #    include <type_traits>
 #    include <typeinfo>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_IOS
diff --git a/include/iosfwd b/include/iosfwd
index 3f8a4cd..708134d 100644
--- a/include/iosfwd
+++ b/include/iosfwd
@@ -105,8 +105,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/iosfwd>
+#else
 #  include <__config>
 #  include <__fwd/fstream.h>
 #  include <__fwd/ios.h>
@@ -185,6 +186,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_IOSFWD
diff --git a/include/iostream b/include/iostream
index 067a7c1..0e83f00 100644
--- a/include/iostream
+++ b/include/iostream
@@ -33,8 +33,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/iostream>
+#else
 #  include <__config>
 #  include <version>
 
@@ -66,6 +67,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_IOSTREAM
diff --git a/include/istream b/include/istream
index c2edc9a..4b177c4 100644
--- a/include/istream
+++ b/include/istream
@@ -158,8 +158,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/istream>
+#else
 #  include <__config>
 
 #  if _LIBCPP_HAS_LOCALIZATION
@@ -1383,6 +1384,6 @@
 
 _LIBCPP_POP_MACROS
 
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_ISTREAM
diff --git a/include/iterator b/include/iterator
index b9bc188..74ee712 100644
--- a/include/iterator
+++ b/include/iterator
@@ -679,8 +679,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/iterator>
+#else
 #  include <__config>
 #  include <__iterator/access.h>
 #  include <__iterator/advance.h>
@@ -753,6 +754,6 @@
 #    include <typeinfo>
 #    include <utility>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_ITERATOR
diff --git a/include/latch b/include/latch
index d21b689..471ef14 100644
--- a/include/latch
+++ b/include/latch
@@ -40,8 +40,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/latch>
+#else
 #  include <__config>
 
 #  if _LIBCPP_HAS_THREADS
@@ -129,6 +130,6 @@
 #    include <atomic>
 #    include <cstddef>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_LATCH
diff --git a/include/limits b/include/limits
index c27950f..1c1a0b2 100644
--- a/include/limits
+++ b/include/limits
@@ -102,8 +102,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/limits>
+#else
 #  include <__config>
 #  include <__type_traits/is_arithmetic.h>
 #  include <__type_traits/is_signed.h>
@@ -535,6 +536,6 @@
 #  if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
 #    include <type_traits>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_LIMITS
diff --git a/include/list b/include/list
index a9d1427..5e2fd40 100644
--- a/include/list
+++ b/include/list
@@ -197,8 +197,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/list>
+#else
 #  include <__algorithm/comp.h>
 #  include <__algorithm/equal.h>
 #  include <__algorithm/lexicographical_compare.h>
@@ -1749,6 +1750,6 @@
 #    include <type_traits>
 #    include <typeinfo>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_LIST
diff --git a/include/locale b/include/locale
index 8421dc6..981f25e 100644
--- a/include/locale
+++ b/include/locale
@@ -187,8 +187,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/locale>
+#else
 #  include <__config>
 
 #  if _LIBCPP_HAS_LOCALIZATION
@@ -3700,6 +3701,6 @@
 #    include <type_traits>
 #    include <typeinfo>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_LOCALE
diff --git a/include/map b/include/map
index 90f807f..76d32ad 100644
--- a/include/map
+++ b/include/map
@@ -571,8 +571,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/map>
+#else
 #  include <__algorithm/equal.h>
 #  include <__algorithm/lexicographical_compare.h>
 #  include <__algorithm/lexicographical_compare_three_way.h>
@@ -2203,6 +2204,6 @@
 #    include <type_traits>
 #    include <utility>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_MAP
diff --git a/include/math.h b/include/math.h
index c338d32..de2dacd 100644
--- a/include/math.h
+++ b/include/math.h
@@ -291,8 +291,9 @@
 
 */
 
-#  if 0
-#  else // 0
+#  if defined(__cplusplus) && __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#    include <__cxx03/math.h>
+#  else
 #    include <__config>
 
 #    if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
@@ -504,7 +505,7 @@
 } // extern "C++"
 
 #    endif // __cplusplus
-#  endif   // 0
+#  endif   // defined(__cplusplus) && __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #else // _LIBCPP_MATH_H
 
diff --git a/include/mdspan b/include/mdspan
index 02582c6..a67ed18 100644
--- a/include/mdspan
+++ b/include/mdspan
@@ -408,8 +408,9 @@
 #ifndef _LIBCPP_MDSPAN
 #define _LIBCPP_MDSPAN
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/mdspan>
+#else
 #  include <__config>
 
 #  if _LIBCPP_STD_VER >= 23
@@ -427,6 +428,6 @@
 #  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #    pragma GCC system_header
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_MDSPAN
diff --git a/include/memory b/include/memory
index 883666b..fc62606 100644
--- a/include/memory
+++ b/include/memory
@@ -934,8 +934,9 @@
 
 // clang-format on
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/memory>
+#else
 #  include <__config>
 #  include <__memory/addressof.h>
 #  include <__memory/align.h>
@@ -996,6 +997,6 @@
 #    include <typeinfo>
 #    include <utility>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_MEMORY
diff --git a/include/memory_resource b/include/memory_resource
index e852e96..5464fc0 100644
--- a/include/memory_resource
+++ b/include/memory_resource
@@ -49,8 +49,9 @@
 
  */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/memory_resource>
+#else
 #  include <__config>
 
 #  if _LIBCPP_STD_VER >= 17
@@ -75,6 +76,6 @@
 #  if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
 #    include <stdexcept>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif /* _LIBCPP_MEMORY_RESOURCE */
diff --git a/include/mutex b/include/mutex
index b699439..9b128e8 100644
--- a/include/mutex
+++ b/include/mutex
@@ -186,8 +186,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/mutex>
+#else
 #  include <__chrono/steady_clock.h>
 #  include <__chrono/time_point.h>
 #  include <__condition_variable/condition_variable.h>
@@ -512,6 +513,6 @@
 #    include <type_traits>
 #    include <typeinfo>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_MUTEX
diff --git a/include/new b/include/new
index 8dd726f..4d72ec2 100644
--- a/include/new
+++ b/include/new
@@ -86,8 +86,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/new>
+#else
 #  include <__config>
 #  include <__new/align_val_t.h>
 #  include <__new/allocate.h>
@@ -118,6 +119,6 @@
 #    include <cstdlib>
 #    include <type_traits>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_NEW
diff --git a/include/numbers b/include/numbers
index 41ee888..7c9e38e 100644
--- a/include/numbers
+++ b/include/numbers
@@ -58,8 +58,9 @@
 }
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/numbers>
+#else
 #  include <__concepts/arithmetic.h>
 #  include <__config>
 #  include <version>
@@ -163,6 +164,6 @@
 #    include <cstddef>
 #    include <type_traits>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_NUMBERS
diff --git a/include/numeric b/include/numeric
index 6055524..2f2b861 100644
--- a/include/numeric
+++ b/include/numeric
@@ -156,8 +156,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/numeric>
+#else
 #  include <__config>
 
 #  include <__numeric/accumulate.h>
@@ -205,6 +206,6 @@
 #    include <optional>
 #    include <type_traits>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_NUMERIC
diff --git a/include/optional b/include/optional
index 1556b8b..165e0f1 100644
--- a/include/optional
+++ b/include/optional
@@ -177,8 +177,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/optional>
+#else
 #  include <__assert>
 #  include <__compare/compare_three_way_result.h>
 #  include <__compare/ordering.h>
@@ -1306,6 +1307,6 @@
 #    include <utility>
 #    include <variant>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_OPTIONAL
diff --git a/include/ostream b/include/ostream
index 900863c..4a627a0 100644
--- a/include/ostream
+++ b/include/ostream
@@ -172,8 +172,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/ostream>
+#else
 #  include <__config>
 
 #  if _LIBCPP_HAS_LOCALIZATION
@@ -204,6 +205,6 @@
 #    include <stdexcept>
 #    include <type_traits>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_OSTREAM
diff --git a/include/print b/include/print
index 3d846ae..1794d60 100644
--- a/include/print
+++ b/include/print
@@ -33,8 +33,9 @@
 }
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/print>
+#else
 #  include <__assert>
 #  include <__concepts/same_as.h>
 #  include <__config>
@@ -401,6 +402,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_PRINT
diff --git a/include/queue b/include/queue
index bebea92..ff69d75 100644
--- a/include/queue
+++ b/include/queue
@@ -254,8 +254,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/queue>
+#else
 #  include <__algorithm/make_heap.h>
 #  include <__algorithm/pop_heap.h>
 #  include <__algorithm/push_heap.h>
@@ -954,6 +955,6 @@
 #    include <functional>
 #    include <type_traits>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_QUEUE
diff --git a/include/random b/include/random
index 08e9c38..a2fc2bd 100644
--- a/include/random
+++ b/include/random
@@ -1677,8 +1677,9 @@
 } // std
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/random>
+#else
 #  include <__config>
 #  include <__random/bernoulli_distribution.h>
 #  include <__random/binomial_distribution.h>
@@ -1740,6 +1741,6 @@
 #    include <type_traits>
 #    include <vector>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_RANDOM
diff --git a/include/ranges b/include/ranges
index 2c6057e..9ef614d 100644
--- a/include/ranges
+++ b/include/ranges
@@ -380,8 +380,9 @@
 }
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/ranges>
+#else
 #  include <__config>
 
 #  if _LIBCPP_STD_VER >= 20
@@ -453,6 +454,6 @@
 #    include <iosfwd>
 #    include <type_traits>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_RANGES
diff --git a/include/ratio b/include/ratio
index 9e56eac..b35e2bd 100644
--- a/include/ratio
+++ b/include/ratio
@@ -81,8 +81,9 @@
 }
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/ratio>
+#else
 #  include <__config>
 #  include <__type_traits/integral_constant.h>
 #  include <climits>
@@ -493,6 +494,6 @@
 #  if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
 #    include <type_traits>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_RATIO
diff --git a/include/regex b/include/regex
index 1983ca9..15ec15a 100644
--- a/include/regex
+++ b/include/regex
@@ -789,8 +789,9 @@
 } // std
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/regex>
+#else
 #  include <__algorithm/find.h>
 #  include <__algorithm/search.h>
 #  include <__assert>
@@ -5834,6 +5835,6 @@
 #    include <typeinfo>
 #    include <utility>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_REGEX
diff --git a/include/scoped_allocator b/include/scoped_allocator
index c207ac0..94a35f6 100644
--- a/include/scoped_allocator
+++ b/include/scoped_allocator
@@ -109,8 +109,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/scoped_allocator>
+#else
 #  include <__config>
 #  include <__memory/allocator_traits.h>
 #  include <__memory/uses_allocator_construction.h>
@@ -571,6 +572,6 @@
 #    include <type_traits>
 #    include <variant>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_SCOPED_ALLOCATOR
diff --git a/include/semaphore b/include/semaphore
index 82f9726..4194dbe 100644
--- a/include/semaphore
+++ b/include/semaphore
@@ -45,8 +45,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/semaphore>
+#else
 #  include <__config>
 
 #  if _LIBCPP_HAS_THREADS
@@ -186,6 +187,6 @@
 #    include <atomic>
 #    include <cstddef>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_SEMAPHORE
diff --git a/include/set b/include/set
index c4b0b01..2784e82 100644
--- a/include/set
+++ b/include/set
@@ -512,8 +512,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/set>
+#else
 #  include <__algorithm/equal.h>
 #  include <__algorithm/lexicographical_compare.h>
 #  include <__algorithm/lexicographical_compare_three_way.h>
@@ -1524,6 +1525,6 @@
 #    include <stdexcept>
 #    include <type_traits>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_SET
diff --git a/include/shared_mutex b/include/shared_mutex
index a6615ea..6738efe 100644
--- a/include/shared_mutex
+++ b/include/shared_mutex
@@ -122,8 +122,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/shared_mutex>
+#else
 #  include <__config>
 
 #  if _LIBCPP_HAS_THREADS
@@ -462,6 +463,6 @@
 #  if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
 #    include <system_error>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_SHARED_MUTEX
diff --git a/include/source_location b/include/source_location
index faa6b0e..bbbb86b 100644
--- a/include/source_location
+++ b/include/source_location
@@ -25,8 +25,9 @@
 }
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/source_location>
+#else
 #  include <__config>
 #  include <cstdint>
 #  include <version>
@@ -84,6 +85,6 @@
 
 _LIBCPP_END_NAMESPACE_STD
 
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_SOURCE_LOCATION
diff --git a/include/span b/include/span
index 2d43d1d..5bb09ec 100644
--- a/include/span
+++ b/include/span
@@ -144,8 +144,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/span>
+#else
 #  include <__assert>
 #  include <__concepts/convertible_to.h>
 #  include <__concepts/equality_comparable.h>
@@ -640,6 +641,6 @@
 #    include <iterator>
 #    include <type_traits>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_SPAN
diff --git a/include/sstream b/include/sstream
index 920c29d..5dcfb44 100644
--- a/include/sstream
+++ b/include/sstream
@@ -312,8 +312,9 @@
 
 // clang-format on
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/sstream>
+#else
 #  include <__config>
 
 #  if _LIBCPP_HAS_LOCALIZATION
@@ -1291,6 +1292,6 @@
 #    include <ostream>
 #    include <type_traits>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_SSTREAM
diff --git a/include/stack b/include/stack
index da3dcf0..3ff3df2 100644
--- a/include/stack
+++ b/include/stack
@@ -113,8 +113,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/stack>
+#else
 #  include <__algorithm/ranges_copy.h>
 #  include <__config>
 #  include <__fwd/stack.h>
@@ -377,6 +378,6 @@
 #    include <functional>
 #    include <type_traits>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_STACK
diff --git a/include/stdatomic.h b/include/stdatomic.h
index 8c96bd6..a0b46e3 100644
--- a/include/stdatomic.h
+++ b/include/stdatomic.h
@@ -117,8 +117,9 @@
 
 */
 
-#if 0
-#else // 0
+#if defined(__cplusplus) && __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/stdatomic.h>
+#else
 #  include <__config>
 
 #  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
@@ -237,6 +238,6 @@
 #    endif
 
 #  endif // defined(__cplusplus)
-#endif   // 0
+#endif   // defined(__cplusplus) && __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_STDATOMIC_H
diff --git a/include/stdbool.h b/include/stdbool.h
index 9f1779e..c34853b 100644
--- a/include/stdbool.h
+++ b/include/stdbool.h
@@ -19,8 +19,9 @@
 
 */
 
-#if 0
-#else // 0
+#if defined(__cplusplus) && __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/stdbool.h>
+#else
 #  include <__config>
 
 #  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
@@ -38,6 +39,6 @@
 #    undef __bool_true_false_are_defined
 #    define __bool_true_false_are_defined 1
 #  endif
-#endif // 0
+#endif // defined(__cplusplus) && __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_STDBOOL_H
diff --git a/include/stddef.h b/include/stddef.h
index 66ad85f..46bed2a 100644
--- a/include/stddef.h
+++ b/include/stddef.h
@@ -24,8 +24,9 @@
 
 */
 
-#if 0
-#else // 0
+#if defined(__cplusplus) && __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/stddef.h>
+#else
 #  include <__config>
 
 #  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
@@ -42,6 +43,6 @@
 #    ifdef __cplusplus
 typedef decltype(nullptr) nullptr_t;
 #    endif
-#  endif // 0
+#  endif // defined(__cplusplus) && __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_STDDEF_H
diff --git a/include/stdexcept b/include/stdexcept
index 58c5509..85e1162 100644
--- a/include/stdexcept
+++ b/include/stdexcept
@@ -41,8 +41,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/stdexcept>
+#else
 #  include <__config>
 #  include <__exception/exception.h>
 #  include <__fwd/string.h>
@@ -286,6 +287,6 @@
 #    include <iosfwd>
 #    include <new>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_STDEXCEPT
diff --git a/include/stdio.h b/include/stdio.h
index 7c73671..d1e57b0 100644
--- a/include/stdio.h
+++ b/include/stdio.h
@@ -87,8 +87,9 @@
 void perror(const char* s);
 */
 
-#if 0
-#else // 0
+#if defined(__cplusplus) && __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/stdio.h>
+#else
 #  include <__config>
 
 #  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
@@ -120,6 +121,6 @@
 #      undef getchar
 
 #    endif
-#  endif // 0
+#  endif // defined(__cplusplus) && __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_STDIO_H
diff --git a/include/stdlib.h b/include/stdlib.h
index b8a2880..e32b7b7 100644
--- a/include/stdlib.h
+++ b/include/stdlib.h
@@ -73,8 +73,9 @@
 
 */
 
-#if 0
-#else // 0
+#if defined(__cplusplus) && __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/stdlib.h>
+#else
 #  include <__config>
 
 #  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
@@ -147,7 +148,7 @@
 #        endif
 #      endif // _LIBCPP_MSVCRT
 } // extern "C++"
-#    endif // __cplusplus
-#  endif   // 0
+#    endif   // __cplusplus
+#  endif     // defined(__cplusplus) && __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_STDLIB_H
diff --git a/include/stop_token b/include/stop_token
index 6a6d133..d240dd7 100644
--- a/include/stop_token
+++ b/include/stop_token
@@ -31,8 +31,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/stop_token>
+#else
 #  include <__config>
 
 #  if _LIBCPP_HAS_THREADS
@@ -55,6 +56,6 @@
 #    include <cstddef>
 #    include <iosfwd>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_STOP_TOKEN
diff --git a/include/streambuf b/include/streambuf
index 12f6b31..7f02a9b 100644
--- a/include/streambuf
+++ b/include/streambuf
@@ -107,8 +107,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/streambuf>
+#else
 #  include <__config>
 
 #  if _LIBCPP_HAS_LOCALIZATION
@@ -448,6 +449,6 @@
 #  if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
 #    include <cstdint>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_STREAMBUF
diff --git a/include/string b/include/string
index e962374..7808f56 100644
--- a/include/string
+++ b/include/string
@@ -586,8 +586,9 @@
 
 // clang-format on
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/string>
+#else
 #  include <__algorithm/max.h>
 #  include <__algorithm/min.h>
 #  include <__algorithm/remove.h>
@@ -2495,7 +2496,7 @@
       __alloc_traits::deallocate(__alloc_, __get_long_pointer(), __get_long_cap());
     throw;
   }
-#  endif // _LIBCPP_HAS_EXCEPTIONS
+#  endif                       // _LIBCPP_HAS_EXCEPTIONS
   __annotate_new(__sz);
 }
 
@@ -4347,6 +4348,6 @@
 #    include <typeinfo>
 #    include <utility>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_STRING
diff --git a/include/string.h b/include/string.h
index 58a4bcb..6bdcd6a 100644
--- a/include/string.h
+++ b/include/string.h
@@ -51,8 +51,9 @@
 
 */
 
-#if 0
-#else // 0
+#if defined(__cplusplus) && __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/string.h>
+#else
 #  include <__config>
 
 #  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
@@ -109,6 +110,6 @@
 }
 } // extern "C++"
 #  endif
-#endif // 0
+#endif // defined(__cplusplus) && __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_STRING_H
diff --git a/include/string_view b/include/string_view
index a62d75a..e797463 100644
--- a/include/string_view
+++ b/include/string_view
@@ -205,8 +205,9 @@
 
 // clang-format on
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/string_view>
+#else
 #  include <__algorithm/min.h>
 #  include <__assert>
 #  include <__config>
@@ -949,6 +950,6 @@
 #    include <iterator>
 #    include <type_traits>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_STRING_VIEW
diff --git a/include/strstream b/include/strstream
index 81dbdf1..90d5669 100644
--- a/include/strstream
+++ b/include/strstream
@@ -129,8 +129,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/strstream>
+#else
 #  include <__config>
 #  include <__ostream/basic_ostream.h>
 #  include <istream>
@@ -350,6 +351,6 @@
 _LIBCPP_POP_MACROS
 
 #  endif // _LIBCPP_STD_VER < 26 || defined(_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM) || defined(_LIBCPP_BUILDING_LIBRARY)
-#endif   // 0
+#endif   // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_STRSTREAM
diff --git a/include/syncstream b/include/syncstream
index f801132..82761be 100644
--- a/include/syncstream
+++ b/include/syncstream
@@ -117,8 +117,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/syncstream>
+#else
 #  include <__config>
 
 #  if _LIBCPP_HAS_LOCALIZATION
@@ -518,6 +519,6 @@
 _LIBCPP_POP_MACROS
 
 #  endif // _LIBCPP_HAS_LOCALIZATION
-#endif   // 0
+#endif   // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_SYNCSTREAM
diff --git a/include/system_error b/include/system_error
index 351e26f..4dadc0a 100644
--- a/include/system_error
+++ b/include/system_error
@@ -144,8 +144,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/system_error>
+#else
 #  include <__config>
 #  include <__system_error/errc.h>
 #  include <__system_error/error_category.h>
@@ -169,6 +170,6 @@
 #    include <limits>
 #    include <type_traits>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_SYSTEM_ERROR
diff --git a/include/tgmath.h b/include/tgmath.h
index 41cae5c..3f8f14f 100644
--- a/include/tgmath.h
+++ b/include/tgmath.h
@@ -17,8 +17,9 @@
 
 */
 
-#if 0
-#else // 0
+#if defined(__cplusplus) && __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/tgmath.h>
+#else
 #  include <__config>
 
 #  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
@@ -33,6 +34,6 @@
 #      include_next <tgmath.h>
 #    endif
 #  endif
-#endif // 0
+#endif // defined(__cplusplus) && __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_TGMATH_H
diff --git a/include/thread b/include/thread
index 719ebe9..029ed41 100644
--- a/include/thread
+++ b/include/thread
@@ -86,8 +86,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/thread>
+#else
 #  include <__config>
 
 #  if _LIBCPP_HAS_THREADS
@@ -127,6 +128,6 @@
 #    include <system_error>
 #    include <type_traits>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_THREAD
diff --git a/include/tuple b/include/tuple
index 035c67a..016cdda 100644
--- a/include/tuple
+++ b/include/tuple
@@ -210,8 +210,9 @@
 
 // clang-format on
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/tuple>
+#else
 #  include <__compare/common_comparison_category.h>
 #  include <__compare/ordering.h>
 #  include <__compare/synth_three_way.h>
@@ -1421,6 +1422,6 @@
 #    include <typeinfo>
 #    include <utility>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_TUPLE
diff --git a/include/type_traits b/include/type_traits
index d7fa8c3..ffcddb0 100644
--- a/include/type_traits
+++ b/include/type_traits
@@ -424,8 +424,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/type_traits>
+#else
 #  include <__config>
 #  include <__type_traits/add_cv_quals.h>
 #  include <__type_traits/add_lvalue_reference.h>
@@ -529,6 +530,6 @@
 #  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #    pragma GCC system_header
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_TYPE_TRAITS
diff --git a/include/typeindex b/include/typeindex
index 5ecba00..76faee4 100644
--- a/include/typeindex
+++ b/include/typeindex
@@ -45,8 +45,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/typeindex>
+#else
 #  include <__config>
 #  include <__functional/unary_function.h>
 #  include <typeinfo>
@@ -105,6 +106,6 @@
 #    include <new>
 #    include <utility>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_TYPEINDEX
diff --git a/include/typeinfo b/include/typeinfo
index 8d3ebea..799c6eb 100644
--- a/include/typeinfo
+++ b/include/typeinfo
@@ -56,8 +56,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/typeinfo>
+#else
 #  include <__config>
 #  include <__cstddef/size_t.h>
 #  include <__exception/exception.h>
@@ -390,6 +391,6 @@
 #    include <cstdlib>
 #    include <type_traits>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_TYPEINFO
diff --git a/include/uchar.h b/include/uchar.h
index 440e005..01e1d57 100644
--- a/include/uchar.h
+++ b/include/uchar.h
@@ -32,8 +32,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/uchar.h>
+#else
 #  include <__config>
 
 #  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
@@ -54,6 +55,6 @@
 #    endif
 
 #  endif // _LIBCPP_CXX03_LANG
-#endif   // 0
+#endif   // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_UCHAR_H
diff --git a/include/unordered_map b/include/unordered_map
index e55b7b7..0ae4138 100644
--- a/include/unordered_map
+++ b/include/unordered_map
@@ -583,8 +583,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/unordered_map>
+#else
 #  include <__algorithm/is_permutation.h>
 #  include <__assert>
 #  include <__config>
@@ -2571,6 +2572,6 @@
 #    include <iterator>
 #    include <type_traits>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_UNORDERED_MAP
diff --git a/include/unordered_set b/include/unordered_set
index 6f243e0..87f0a9f 100644
--- a/include/unordered_set
+++ b/include/unordered_set
@@ -531,8 +531,9 @@
 
 // clang-format on
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/unordered_set>
+#else
 #  include <__algorithm/is_permutation.h>
 #  include <__assert>
 #  include <__config>
@@ -1843,6 +1844,6 @@
 #    include <stdexcept>
 #    include <type_traits>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_UNORDERED_SET
diff --git a/include/utility b/include/utility
index c761a83..fb8a6f8 100644
--- a/include/utility
+++ b/include/utility
@@ -246,8 +246,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/utility>
+#else
 #  include <__config>
 
 #  include <__utility/declval.h>
@@ -308,6 +309,6 @@
 #    include <iosfwd>
 #    include <type_traits>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_UTILITY
diff --git a/include/valarray b/include/valarray
index ef94dde..d0b76ee 100644
--- a/include/valarray
+++ b/include/valarray
@@ -343,8 +343,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/valarray>
+#else
 #  include <__algorithm/copy.h>
 #  include <__algorithm/count.h>
 #  include <__algorithm/fill.h>
@@ -3361,6 +3362,6 @@
 #    include <stdexcept>
 #    include <type_traits>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_VALARRAY
diff --git a/include/variant b/include/variant
index 7d2788e..3fa1b4b 100644
--- a/include/variant
+++ b/include/variant
@@ -212,8 +212,9 @@
 
 */
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/variant>
+#else
 #  include <__compare/common_comparison_category.h>
 #  include <__compare/compare_three_way_result.h>
 #  include <__compare/ordering.h>
@@ -1636,6 +1637,6 @@
 #    include <typeinfo>
 #    include <utility>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_VARIANT
diff --git a/include/vector b/include/vector
index a35686f..9fa81dc 100644
--- a/include/vector
+++ b/include/vector
@@ -304,8 +304,9 @@
 
 // clang-format on
 
-#if 0
-#else // 0
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/vector>
+#else
 #  include <__config>
 
 #  include <__vector/comparison.h>
@@ -368,6 +369,6 @@
 #    include <typeinfo>
 #    include <utility>
 #  endif
-#endif // 0
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_VECTOR
diff --git a/include/version b/include/version
index fc57aea..23cffd9 100644
--- a/include/version
+++ b/include/version
@@ -269,11 +269,14 @@
 
 */
 
-#include <__config>
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/version>
+#else
+#  include <__config>
 
-#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#  pragma GCC system_header
-#endif
+#  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#    pragma GCC system_header
+#  endif
 
 // clang-format off
 
@@ -581,6 +584,8 @@
 # define __cpp_lib_variant                              202306L
 #endif
 
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+
 // clang-format on
 
 #endif // _LIBCPP_VERSIONH
diff --git a/include/wchar.h b/include/wchar.h
index 85f16fc..436027b 100644
--- a/include/wchar.h
+++ b/include/wchar.h
@@ -94,8 +94,9 @@
 
 */
 
-#if 0
-#else // 0
+#if defined(__cplusplus) && __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/wchar.h>
+#else
 #  include <__config>
 
 #  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
@@ -205,6 +206,6 @@
 } // extern "C"
 #      endif // __cplusplus && (_LIBCPP_MSVCRT || __MVS__)
 #    endif   // _LIBCPP_HAS_WIDE_CHARACTERS
-#  endif     // 0
+#  endif     // defined(__cplusplus) && __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_WCHAR_H
diff --git a/include/wctype.h b/include/wctype.h
index fb48d49..9a5b163 100644
--- a/include/wctype.h
+++ b/include/wctype.h
@@ -44,8 +44,9 @@
 
 */
 
-#if 0
-#else // 0
+#if defined(__cplusplus) && __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/wctype.h>
+#else
 #  include <__config>
 
 #  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
@@ -88,6 +89,6 @@
 #    undef wctrans
 
 #  endif // __cplusplus
-#endif   // 0
+#endif   // defined(__cplusplus) && __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
 
 #endif // _LIBCPP_WCTYPE_H
diff --git a/test/libcxx/algorithms/half_positive.pass.cpp b/test/libcxx/algorithms/half_positive.pass.cpp
index 40f4697..88a18e8 100644
--- a/test/libcxx/algorithms/half_positive.pass.cpp
+++ b/test/libcxx/algorithms/half_positive.pass.cpp
@@ -11,6 +11,8 @@
 // __half_positive divides an integer number by 2 as unsigned number for known types.
 // It can be an important optimization for lower bound, for example.
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <__algorithm/half_positive.h>
 #include <cassert>
 #include <cstddef>
diff --git a/test/libcxx/assertions/customize_verbose_abort.link-time.pass.cpp b/test/libcxx/assertions/customize_verbose_abort.link-time.pass.cpp
index 21e9003..390c6b6 100644
--- a/test/libcxx/assertions/customize_verbose_abort.link-time.pass.cpp
+++ b/test/libcxx/assertions/customize_verbose_abort.link-time.pass.cpp
@@ -12,6 +12,8 @@
 // failures when back-deploying.
 // XFAIL: availability-verbose_abort-missing
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <__verbose_abort>
 #include <cstdlib>
 
diff --git a/test/libcxx/assertions/default_verbose_abort.pass.cpp b/test/libcxx/assertions/default_verbose_abort.pass.cpp
index 0cc4b1e..803868b 100644
--- a/test/libcxx/assertions/default_verbose_abort.pass.cpp
+++ b/test/libcxx/assertions/default_verbose_abort.pass.cpp
@@ -9,6 +9,8 @@
 // Test that the default verbose termination function aborts the program.
 // XFAIL: availability-verbose_abort-missing
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <__verbose_abort>
 #include <csignal>
 #include <cstdlib>
diff --git a/test/libcxx/assertions/modes/none.pass.cpp b/test/libcxx/assertions/modes/none.pass.cpp
index 8332848..b64290a 100644
--- a/test/libcxx/assertions/modes/none.pass.cpp
+++ b/test/libcxx/assertions/modes/none.pass.cpp
@@ -11,6 +11,8 @@
 
 // REQUIRES: libcpp-hardening-mode=none
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <__assert>
 #include <cassert>
 
diff --git a/test/libcxx/assertions/single_expression.pass.cpp b/test/libcxx/assertions/single_expression.pass.cpp
index 13253e4..474edc9 100644
--- a/test/libcxx/assertions/single_expression.pass.cpp
+++ b/test/libcxx/assertions/single_expression.pass.cpp
@@ -10,6 +10,8 @@
 // This is useful so we can use them  in places that require an expression, such as
 // in a constructor initializer list.
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <__assert>
 #include <cassert>
 
diff --git a/test/libcxx/atomics/atomics.syn/compatible_with_stdatomic.compile.pass.cpp b/test/libcxx/atomics/atomics.syn/compatible_with_stdatomic.compile.pass.cpp
index a52459a..323072d 100644
--- a/test/libcxx/atomics/atomics.syn/compatible_with_stdatomic.compile.pass.cpp
+++ b/test/libcxx/atomics/atomics.syn/compatible_with_stdatomic.compile.pass.cpp
@@ -8,6 +8,8 @@
 
 // UNSUPPORTED: no-threads
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 // This test verifies that <stdatomic.h> redirects to <atomic>. As an extension,
 // libc++ enables this redirection even before C++23.
 
diff --git a/test/libcxx/clang_modules_include.gen.py b/test/libcxx/clang_modules_include.gen.py
index dc815d9..379ac22 100644
--- a/test/libcxx/clang_modules_include.gen.py
+++ b/test/libcxx/clang_modules_include.gen.py
@@ -52,6 +52,8 @@
 // TODO: Fix seemingly circular inclusion or <wchar.h> on AIX
 // UNSUPPORTED: LIBCXX-AIX-FIXME
 
+// UNSUPPORTED: FROZEN-CXX03-HEADERS-FIXME
+
 {lit_header_restrictions.get(header, '')}
 {lit_header_undeprecations.get(header, '')}
 
diff --git a/test/libcxx/containers/associative/tree_balance_after_insert.pass.cpp b/test/libcxx/containers/associative/tree_balance_after_insert.pass.cpp
index c3d100e..a99f4ff 100644
--- a/test/libcxx/containers/associative/tree_balance_after_insert.pass.cpp
+++ b/test/libcxx/containers/associative/tree_balance_after_insert.pass.cpp
@@ -13,6 +13,8 @@
 // void
 // __tree_balance_after_insert(_NodePtr __root, _NodePtr __x)
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <__tree>
 #include <cassert>
 
diff --git a/test/libcxx/containers/associative/tree_key_value_traits.pass.cpp b/test/libcxx/containers/associative/tree_key_value_traits.pass.cpp
index 12289c8..bebdcaa 100644
--- a/test/libcxx/containers/associative/tree_key_value_traits.pass.cpp
+++ b/test/libcxx/containers/associative/tree_key_value_traits.pass.cpp
@@ -6,6 +6,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <__tree>
 #include <map>
 #include <set>
diff --git a/test/libcxx/containers/associative/tree_left_rotate.pass.cpp b/test/libcxx/containers/associative/tree_left_rotate.pass.cpp
index b766489..f8073d6 100644
--- a/test/libcxx/containers/associative/tree_left_rotate.pass.cpp
+++ b/test/libcxx/containers/associative/tree_left_rotate.pass.cpp
@@ -13,6 +13,8 @@
 // void
 // __tree_left_rotate(_NodePtr __x);
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <__tree>
 #include <cassert>
 
diff --git a/test/libcxx/containers/associative/tree_remove.pass.cpp b/test/libcxx/containers/associative/tree_remove.pass.cpp
index e9afd84..0b2d867 100644
--- a/test/libcxx/containers/associative/tree_remove.pass.cpp
+++ b/test/libcxx/containers/associative/tree_remove.pass.cpp
@@ -13,6 +13,8 @@
 // void
 // __tree_remove(_NodePtr __root, _NodePtr __z)
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <__tree>
 #include <cassert>
 
diff --git a/test/libcxx/containers/associative/tree_right_rotate.pass.cpp b/test/libcxx/containers/associative/tree_right_rotate.pass.cpp
index 04d2b09..16ca81f 100644
--- a/test/libcxx/containers/associative/tree_right_rotate.pass.cpp
+++ b/test/libcxx/containers/associative/tree_right_rotate.pass.cpp
@@ -13,6 +13,8 @@
 // void
 // __tree_right_rotate(_NodePtr __x);
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <__tree>
 #include <cassert>
 
diff --git a/test/libcxx/containers/associative/unord.map/abi.compile.pass.cpp b/test/libcxx/containers/associative/unord.map/abi.compile.pass.cpp
index cea074a..55d42a8 100644
--- a/test/libcxx/containers/associative/unord.map/abi.compile.pass.cpp
+++ b/test/libcxx/containers/associative/unord.map/abi.compile.pass.cpp
@@ -12,6 +12,8 @@
 // unordered containers changes when bounded unique_ptr is enabled.
 // UNSUPPORTED: libcpp-has-abi-bounded-unique_ptr
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <cstdint>
 #include <unordered_map>
 
diff --git a/test/libcxx/containers/associative/unord.set/abi.compile.pass.cpp b/test/libcxx/containers/associative/unord.set/abi.compile.pass.cpp
index 2a112af..bee2012 100644
--- a/test/libcxx/containers/associative/unord.set/abi.compile.pass.cpp
+++ b/test/libcxx/containers/associative/unord.set/abi.compile.pass.cpp
@@ -12,6 +12,8 @@
 // unordered containers changes when bounded unique_ptr is enabled.
 // UNSUPPORTED: libcpp-has-abi-bounded-unique_ptr
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <cstdint>
 #include <unordered_set>
 
diff --git a/test/libcxx/containers/container_traits.compile.pass.cpp b/test/libcxx/containers/container_traits.compile.pass.cpp
index 1452bfb..22be217 100644
--- a/test/libcxx/containers/container_traits.compile.pass.cpp
+++ b/test/libcxx/containers/container_traits.compile.pass.cpp
@@ -9,6 +9,8 @@
 // <__type_traits/container_traits.h>
 //
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <__type_traits/container_traits.h>
 
 #include <deque>
diff --git a/test/libcxx/containers/unord/key_value_traits.pass.cpp b/test/libcxx/containers/unord/key_value_traits.pass.cpp
index c5e4203..4b389fa 100644
--- a/test/libcxx/containers/unord/key_value_traits.pass.cpp
+++ b/test/libcxx/containers/unord/key_value_traits.pass.cpp
@@ -6,6 +6,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <__hash_table>
 #include <unordered_map>
 #include <unordered_set>
diff --git a/test/libcxx/containers/unord/next_pow2.pass.cpp b/test/libcxx/containers/unord/next_pow2.pass.cpp
index 0b56c96..8a5d448 100644
--- a/test/libcxx/containers/unord/next_pow2.pass.cpp
+++ b/test/libcxx/containers/unord/next_pow2.pass.cpp
@@ -18,6 +18,8 @@
 // If n <= 1, return n. If n is a power of 2, return n.
 // Otherwise, return the next power of 2.
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <__hash_table>
 #include <cassert>
 #include <cstdint>
diff --git a/test/libcxx/containers/unord/next_prime.pass.cpp b/test/libcxx/containers/unord/next_prime.pass.cpp
index 0efbe03..17a2903 100644
--- a/test/libcxx/containers/unord/next_prime.pass.cpp
+++ b/test/libcxx/containers/unord/next_prime.pass.cpp
@@ -16,6 +16,8 @@
 
 // If n == 0, return 0, else return the lowest prime greater than or equal to n
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <__hash_table>
 #include <cassert>
 #include <cstddef>
diff --git a/test/libcxx/depr/depr.c.headers/extern_c.pass.cpp b/test/libcxx/depr/depr.c.headers/extern_c.pass.cpp
index d0ac717..f756aac 100644
--- a/test/libcxx/depr/depr.c.headers/extern_c.pass.cpp
+++ b/test/libcxx/depr/depr.c.headers/extern_c.pass.cpp
@@ -10,6 +10,8 @@
 // that we don't want to support and can't support with LSV enabled.
 // UNSUPPORTED: clang-modules-build
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 // Sometimes C++'s <foo.h> headers get included within extern "C" contexts. This
 // is ill-formed (no diagnostic required), per [using.headers]p3, but we permit
 // it as an extension.
diff --git a/test/libcxx/header_inclusions.gen.py b/test/libcxx/header_inclusions.gen.py
index 739caf9..e00cf18 100644
--- a/test/libcxx/header_inclusions.gen.py
+++ b/test/libcxx/header_inclusions.gen.py
@@ -10,6 +10,7 @@
 # prescribed by the Standard.
 
 # RUN: %{python} %s %{libcxx-dir}/utils
+# END.
 
 import sys
 
@@ -45,6 +46,8 @@
     print(
         f"""\
 //--- {header}.compile.pass.cpp
+// UNSUPPORTED: FROZEN-CXX03-HEADERS-FIXME
+
 {lit_header_restrictions.get(header, '')}
 {lit_header_undeprecations.get(header, '')}
 
diff --git a/test/libcxx/input.output/file.streams/fstreams/filebuf/traits_mismatch.verify.cpp b/test/libcxx/input.output/file.streams/fstreams/filebuf/traits_mismatch.verify.cpp
index 2157b2e..37ab176 100644
--- a/test/libcxx/input.output/file.streams/fstreams/filebuf/traits_mismatch.verify.cpp
+++ b/test/libcxx/input.output/file.streams/fstreams/filebuf/traits_mismatch.verify.cpp
@@ -15,6 +15,8 @@
 
 // UNSUPPORTED: no-wide-characters
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <fstream>
 
 std::basic_filebuf<char, std::char_traits<wchar_t> > f;
diff --git a/test/libcxx/input.output/file.streams/fstreams/traits_mismatch.verify.cpp b/test/libcxx/input.output/file.streams/fstreams/traits_mismatch.verify.cpp
index b77f6a0..f936d8d 100644
--- a/test/libcxx/input.output/file.streams/fstreams/traits_mismatch.verify.cpp
+++ b/test/libcxx/input.output/file.streams/fstreams/traits_mismatch.verify.cpp
@@ -15,6 +15,8 @@
 
 // UNSUPPORTED: no-wide-characters
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <fstream>
 
 std::basic_fstream<char, std::char_traits<wchar_t> > f;
diff --git a/test/libcxx/input.output/iostream.format/input.streams/traits_mismatch.verify.cpp b/test/libcxx/input.output/iostream.format/input.streams/traits_mismatch.verify.cpp
index 435e1df..7d713ed 100644
--- a/test/libcxx/input.output/iostream.format/input.streams/traits_mismatch.verify.cpp
+++ b/test/libcxx/input.output/iostream.format/input.streams/traits_mismatch.verify.cpp
@@ -15,6 +15,8 @@
 
 // UNSUPPORTED: no-wide-characters
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <istream>
 #include <string>
 
diff --git a/test/libcxx/input.output/iostream.format/output.streams/traits_mismatch.verify.cpp b/test/libcxx/input.output/iostream.format/output.streams/traits_mismatch.verify.cpp
index f947507..445ddd1 100644
--- a/test/libcxx/input.output/iostream.format/output.streams/traits_mismatch.verify.cpp
+++ b/test/libcxx/input.output/iostream.format/output.streams/traits_mismatch.verify.cpp
@@ -15,6 +15,8 @@
 
 // UNSUPPORTED: no-wide-characters
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <ostream>
 #include <string>
 
diff --git a/test/libcxx/input.output/string.streams/stringbuf/const_sso_buffer.pass.cpp b/test/libcxx/input.output/string.streams/stringbuf/const_sso_buffer.pass.cpp
index d6caa33..2b6c380 100644
--- a/test/libcxx/input.output/string.streams/stringbuf/const_sso_buffer.pass.cpp
+++ b/test/libcxx/input.output/string.streams/stringbuf/const_sso_buffer.pass.cpp
@@ -8,6 +8,8 @@
 
 // <sstream>
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 // How the constructors of basic_stringbuf initialize the buffer pointers is
 // not specified. For some constructors it's implementation defined whether the
 // pointers are set to nullptr. Libc++'s implementation directly uses the SSO
diff --git a/test/libcxx/input.output/string.streams/traits_mismatch.verify.cpp b/test/libcxx/input.output/string.streams/traits_mismatch.verify.cpp
index 466ad70..89dc884 100644
--- a/test/libcxx/input.output/string.streams/traits_mismatch.verify.cpp
+++ b/test/libcxx/input.output/string.streams/traits_mismatch.verify.cpp
@@ -16,6 +16,8 @@
 
 // UNSUPPORTED: no-wide-characters
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <sstream>
 
 std::basic_stringbuf<char, std::char_traits<wchar_t> > sb;
diff --git a/test/libcxx/iterators/aliasing_iterator.pass.cpp b/test/libcxx/iterators/aliasing_iterator.pass.cpp
index 60587d5..3377457 100644
--- a/test/libcxx/iterators/aliasing_iterator.pass.cpp
+++ b/test/libcxx/iterators/aliasing_iterator.pass.cpp
@@ -8,6 +8,8 @@
 
 // ADDITIONAL_COMPILE_FLAGS(clang): -Wprivate-header
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <__iterator/aliasing_iterator.h>
 #include <cassert>
 
diff --git a/test/libcxx/iterators/bounded_iter/arithmetic.pass.cpp b/test/libcxx/iterators/bounded_iter/arithmetic.pass.cpp
index 45d0cc3..3fc735b 100644
--- a/test/libcxx/iterators/bounded_iter/arithmetic.pass.cpp
+++ b/test/libcxx/iterators/bounded_iter/arithmetic.pass.cpp
@@ -11,6 +11,8 @@
 //
 // Arithmetic operators
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <__iterator/bounded_iter.h>
 #include <cstddef>
 
diff --git a/test/libcxx/iterators/bounded_iter/comparison.pass.cpp b/test/libcxx/iterators/bounded_iter/comparison.pass.cpp
index cef2157..a12b77a 100644
--- a/test/libcxx/iterators/bounded_iter/comparison.pass.cpp
+++ b/test/libcxx/iterators/bounded_iter/comparison.pass.cpp
@@ -11,6 +11,8 @@
 //
 // Comparison operators
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <concepts>
 #include <__iterator/bounded_iter.h>
 
diff --git a/test/libcxx/iterators/bounded_iter/pointer_traits.pass.cpp b/test/libcxx/iterators/bounded_iter/pointer_traits.pass.cpp
index bfd779d..22ad8c6 100644
--- a/test/libcxx/iterators/bounded_iter/pointer_traits.pass.cpp
+++ b/test/libcxx/iterators/bounded_iter/pointer_traits.pass.cpp
@@ -11,6 +11,8 @@
 //
 // std::pointer_traits specialization
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <__iterator/bounded_iter.h>
 #include <cassert>
 #include <cstddef>
diff --git a/test/libcxx/iterators/bounded_iter/types.compile.pass.cpp b/test/libcxx/iterators/bounded_iter/types.compile.pass.cpp
index 56ded9a..d205c5b 100644
--- a/test/libcxx/iterators/bounded_iter/types.compile.pass.cpp
+++ b/test/libcxx/iterators/bounded_iter/types.compile.pass.cpp
@@ -11,6 +11,8 @@
 //
 // Nested types
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <__iterator/bounded_iter.h>
 #include <cstddef>
 #include <iterator>
diff --git a/test/libcxx/iterators/contiguous_iterators.conv.compile.pass.cpp b/test/libcxx/iterators/contiguous_iterators.conv.compile.pass.cpp
index 3725595..4d36909 100644
--- a/test/libcxx/iterators/contiguous_iterators.conv.compile.pass.cpp
+++ b/test/libcxx/iterators/contiguous_iterators.conv.compile.pass.cpp
@@ -15,6 +15,8 @@
 
 // Verify that libc++-wrapped iterators do not permit slicing conversion or construction.
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <array>
 #include <span>
 #include <type_traits>
diff --git a/test/libcxx/iterators/contiguous_iterators.verify.cpp b/test/libcxx/iterators/contiguous_iterators.verify.cpp
index 479d40a..ba2697c 100644
--- a/test/libcxx/iterators/contiguous_iterators.verify.cpp
+++ b/test/libcxx/iterators/contiguous_iterators.verify.cpp
@@ -11,6 +11,8 @@
 
 // __bounded_iter<_Iter>
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 // Verify that __bounded_iter does not accept non-contiguous iterators as determined by __libcpp_is_contiguous_iterator.
 // static_assert should be used, see https://github.com/llvm/llvm-project/issues/115002.
 // __wrap_iter cannot be so handled because it may directly wrap user-defined fancy pointers in libc++'s vector.
diff --git a/test/libcxx/iterators/iterator.primitives/iterator.operations/prev.verify.cpp b/test/libcxx/iterators/iterator.primitives/iterator.operations/prev.verify.cpp
index da0a336..ffef687 100644
--- a/test/libcxx/iterators/iterator.primitives/iterator.operations/prev.verify.cpp
+++ b/test/libcxx/iterators/iterator.primitives/iterator.operations/prev.verify.cpp
@@ -8,6 +8,8 @@
 
 // std::prev
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <iterator>
 #include "test_iterators.h"
 
diff --git a/test/libcxx/language.support/support.dynamic/libcpp_deallocate.sh.cpp b/test/libcxx/language.support/support.dynamic/libcpp_deallocate.sh.cpp
index 37e3f81..b283c8a 100644
--- a/test/libcxx/language.support/support.dynamic/libcpp_deallocate.sh.cpp
+++ b/test/libcxx/language.support/support.dynamic/libcpp_deallocate.sh.cpp
@@ -21,6 +21,8 @@
 // GCC doesn't support the aligned-allocation flags.
 // XFAIL: gcc
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 // RUN: %{build} -faligned-allocation -fsized-deallocation
 // RUN: %{run}
 // RUN: %{build} -faligned-allocation -fno-sized-deallocation -DNO_SIZE
diff --git a/test/libcxx/lint/lint_cmakelists.sh.py b/test/libcxx/lint/lint_cmakelists.sh.py
index 417f9ac..286508c 100644
--- a/test/libcxx/lint/lint_cmakelists.sh.py
+++ b/test/libcxx/lint/lint_cmakelists.sh.py
@@ -20,7 +20,9 @@
     okay = True
     prevline = lines[1]
     for line in lines[2:]:
-        if line == "  )\n":
+        if line == "\n":
+            continue
+        if line == "# C++03 frozen headers\n":
             break
         if line < prevline:
             okay = False
diff --git a/test/libcxx/memory/allocation_guard.pass.cpp b/test/libcxx/memory/allocation_guard.pass.cpp
index 493ebf0..20c05b3 100644
--- a/test/libcxx/memory/allocation_guard.pass.cpp
+++ b/test/libcxx/memory/allocation_guard.pass.cpp
@@ -12,6 +12,8 @@
 // To allow checking that self-move works correctly.
 // ADDITIONAL_COMPILE_FLAGS: -Wno-self-move
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 // template<class _Alloc>
 // struct __allocation_guard;
 
diff --git a/test/libcxx/memory/swap_allocator.pass.cpp b/test/libcxx/memory/swap_allocator.pass.cpp
index 3116602..f70f813 100644
--- a/test/libcxx/memory/swap_allocator.pass.cpp
+++ b/test/libcxx/memory/swap_allocator.pass.cpp
@@ -7,6 +7,8 @@
 //===----------------------------------------------------------------------===//
 //
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 // <memory>
 
 // template <typename _Alloc>
diff --git a/test/libcxx/numerics/bit.ops.pass.cpp b/test/libcxx/numerics/bit.ops.pass.cpp
index 7f502d6..1bf9d38 100644
--- a/test/libcxx/numerics/bit.ops.pass.cpp
+++ b/test/libcxx/numerics/bit.ops.pass.cpp
@@ -9,6 +9,8 @@
 // Test the __XXXX routines in the <bit> header.
 // These are not supposed to be exhaustive tests, just sanity checks.
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <__bit/bit_log2.h>
 #include <__bit/countl.h>
 #include <__bit/rotate.h>
diff --git a/test/libcxx/numerics/clamp_to_integral.pass.cpp b/test/libcxx/numerics/clamp_to_integral.pass.cpp
index aed78f9..68d55af 100644
--- a/test/libcxx/numerics/clamp_to_integral.pass.cpp
+++ b/test/libcxx/numerics/clamp_to_integral.pass.cpp
@@ -12,6 +12,8 @@
 // closest representable value for the specified integer type, or
 // numeric_limits<IntT>::max()/min() if the value isn't representable.
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <__random/clamp_to_integral.h>
 #include <cassert>
 #include <cmath>
diff --git a/test/libcxx/numerics/complex.number/cmplx.over.pow.pass.cpp b/test/libcxx/numerics/complex.number/cmplx.over.pow.pass.cpp
index 1c790c2..8c1b3a1 100644
--- a/test/libcxx/numerics/complex.number/cmplx.over.pow.pass.cpp
+++ b/test/libcxx/numerics/complex.number/cmplx.over.pow.pass.cpp
@@ -8,6 +8,8 @@
 
 // <complex>
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 //  template<class T, class U> complex<__promote<T, U>::type> pow(const complex<T>&, const U&);
 //  template<class T, class U> complex<__promote<T, U>::type> pow(const complex<T>&, const complex<U>&);
 //  template<class T, class U> complex<__promote<T, U>::type> pow(const T&, const complex<U>&);
diff --git a/test/libcxx/selftest/test_macros.pass.cpp b/test/libcxx/selftest/test_macros.pass.cpp
index caa31ba..9bcf7cf 100644
--- a/test/libcxx/selftest/test_macros.pass.cpp
+++ b/test/libcxx/selftest/test_macros.pass.cpp
@@ -7,6 +7,9 @@
 //===----------------------------------------------------------------------===//
 //
 // Test the "test_macros.h" header.
+
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <__config>
 #include "test_macros.h"
 
diff --git a/test/libcxx/strings/c.strings/constexpr_memmove.pass.cpp b/test/libcxx/strings/c.strings/constexpr_memmove.pass.cpp
index bdc1844..2009cbe 100644
--- a/test/libcxx/strings/c.strings/constexpr_memmove.pass.cpp
+++ b/test/libcxx/strings/c.strings/constexpr_memmove.pass.cpp
@@ -19,6 +19,8 @@
 // and is_trivially_XXX_assignable), so we use some funky types to test these
 // corner cases.
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <__string/constexpr_c_functions.h>
 #include <cassert>
 #include <cstdint>
diff --git a/test/libcxx/transitive_includes.gen.py b/test/libcxx/transitive_includes.gen.py
index f01dbac..6f99240 100644
--- a/test/libcxx/transitive_includes.gen.py
+++ b/test/libcxx/transitive_includes.gen.py
@@ -90,6 +90,8 @@
 // TODO: Figure out why <stdatomic.h> doesn't work on FreeBSD
 // UNSUPPORTED: LIBCXX-FREEBSD-FIXME
 
+// UNSUPPORTED: FROZEN-CXX03-HEADERS-FIXME
+
 // RUN: mkdir %t
 // RUN: %{{cxx}} %s %{{flags}} %{{compile_flags}} --trace-includes -fshow-skipped-includes --preprocess > /dev/null 2> %t/trace-includes.txt
 // RUN: %{{python}} %{{libcxx-dir}}/test/libcxx/transitive_includes/to_csv.py %t/trace-includes.txt > %t/actual_transitive_includes.csv
diff --git a/test/libcxx/type_traits/datasizeof.compile.pass.cpp b/test/libcxx/type_traits/datasizeof.compile.pass.cpp
index 51e3a85..67a4dcc 100644
--- a/test/libcxx/type_traits/datasizeof.compile.pass.cpp
+++ b/test/libcxx/type_traits/datasizeof.compile.pass.cpp
@@ -6,6 +6,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <__type_traits/datasizeof.h>
 #include <cstdint>
 #include <type_traits>
diff --git a/test/libcxx/type_traits/is_constant_evaluated.pass.cpp b/test/libcxx/type_traits/is_constant_evaluated.pass.cpp
index 5a779c0..a538c52 100644
--- a/test/libcxx/type_traits/is_constant_evaluated.pass.cpp
+++ b/test/libcxx/type_traits/is_constant_evaluated.pass.cpp
@@ -14,6 +14,8 @@
 // returns false when there's no constant evaluation support from the compiler.
 //  as well as when called not in a constexpr context
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <__type_traits/is_constant_evaluated.h>
 #include <cassert>
 
diff --git a/test/libcxx/type_traits/is_trivially_comparable.compile.pass.cpp b/test/libcxx/type_traits/is_trivially_comparable.compile.pass.cpp
index e2be399..e9b5308 100644
--- a/test/libcxx/type_traits/is_trivially_comparable.compile.pass.cpp
+++ b/test/libcxx/type_traits/is_trivially_comparable.compile.pass.cpp
@@ -6,6 +6,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <__type_traits/conditional.h>
 #include <__type_traits/is_equality_comparable.h>
 #include <__type_traits/is_signed.h>
diff --git a/test/libcxx/type_traits/is_trivially_relocatable.compile.pass.cpp b/test/libcxx/type_traits/is_trivially_relocatable.compile.pass.cpp
index 110180f..674df1d 100644
--- a/test/libcxx/type_traits/is_trivially_relocatable.compile.pass.cpp
+++ b/test/libcxx/type_traits/is_trivially_relocatable.compile.pass.cpp
@@ -6,6 +6,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <__type_traits/is_trivially_relocatable.h>
 #include <array>
 #include <deque>
diff --git a/test/libcxx/utilities/exception_guard.odr.sh.cpp b/test/libcxx/utilities/exception_guard.odr.sh.cpp
index f6b8a29..fb51a4b 100644
--- a/test/libcxx/utilities/exception_guard.odr.sh.cpp
+++ b/test/libcxx/utilities/exception_guard.odr.sh.cpp
@@ -9,6 +9,8 @@
 // This test relies on `typeid` and thus requires `-frtti`.
 // UNSUPPORTED: no-rtti
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 // Make sure that we don't get ODR violations with __exception_guard when
 // linking together TUs compiled with different values of -f[no-]exceptions.
 
diff --git a/test/libcxx/utilities/is_pointer_in_range.pass.cpp b/test/libcxx/utilities/is_pointer_in_range.pass.cpp
index fc4d3a9..b0a27c7 100644
--- a/test/libcxx/utilities/is_pointer_in_range.pass.cpp
+++ b/test/libcxx/utilities/is_pointer_in_range.pass.cpp
@@ -6,6 +6,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <__utility/is_pointer_in_range.h>
 #include <cassert>
 
diff --git a/test/libcxx/utilities/is_valid_range.pass.cpp b/test/libcxx/utilities/is_valid_range.pass.cpp
index 345e2fe..cb800ae 100644
--- a/test/libcxx/utilities/is_valid_range.pass.cpp
+++ b/test/libcxx/utilities/is_valid_range.pass.cpp
@@ -6,6 +6,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <__utility/is_valid_range.h>
 #include <cassert>
 
diff --git a/test/libcxx/utilities/meta/meta_base.pass.cpp b/test/libcxx/utilities/meta/meta_base.pass.cpp
index 89f0808..66c25b1 100644
--- a/test/libcxx/utilities/meta/meta_base.pass.cpp
+++ b/test/libcxx/utilities/meta/meta_base.pass.cpp
@@ -7,6 +7,8 @@
 //===----------------------------------------------------------------------===//
 //
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include "test_macros.h"
 
 TEST_CLANG_DIAGNOSTIC_IGNORED("-Wprivate-header")
diff --git a/test/libcxx/utilities/no_destroy.pass.cpp b/test/libcxx/utilities/no_destroy.pass.cpp
index 9a874a6..8693bb1 100644
--- a/test/libcxx/utilities/no_destroy.pass.cpp
+++ b/test/libcxx/utilities/no_destroy.pass.cpp
@@ -6,6 +6,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <__utility/no_destroy.h>
 #include <cassert>
 
diff --git a/test/libcxx/utilities/template.bitset/includes.pass.cpp b/test/libcxx/utilities/template.bitset/includes.pass.cpp
index 214b0ef..ae8464a 100644
--- a/test/libcxx/utilities/template.bitset/includes.pass.cpp
+++ b/test/libcxx/utilities/template.bitset/includes.pass.cpp
@@ -8,6 +8,8 @@
 
 // test that <bitset> includes <string>, <stdexcept> and <iosfwd>
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <bitset>
 
 #include "test_macros.h"
diff --git a/test/libcxx/utilities/utility/private_constructor_tag.compile.pass.cpp b/test/libcxx/utilities/utility/private_constructor_tag.compile.pass.cpp
index 097e05f..bae0824 100644
--- a/test/libcxx/utilities/utility/private_constructor_tag.compile.pass.cpp
+++ b/test/libcxx/utilities/utility/private_constructor_tag.compile.pass.cpp
@@ -6,6 +6,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 // struct __private_constructor_tag{};
 
 // The private constructor tag is intended to be a trivial type that can easily
diff --git a/test/std/containers/sequences/array/array.fill/fill.verify.cpp b/test/std/containers/sequences/array/array.fill/fill.verify.cpp
index da16fd4..d82d0d6 100644
--- a/test/std/containers/sequences/array/array.fill/fill.verify.cpp
+++ b/test/std/containers/sequences/array/array.fill/fill.verify.cpp
@@ -10,6 +10,8 @@
 
 // void fill(const T& u);
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <array>
 #include <cassert>
 
diff --git a/test/std/containers/sequences/array/array.swap/swap.verify.cpp b/test/std/containers/sequences/array/array.swap/swap.verify.cpp
index 03cfcca..7816b26 100644
--- a/test/std/containers/sequences/array/array.swap/swap.verify.cpp
+++ b/test/std/containers/sequences/array/array.swap/swap.verify.cpp
@@ -10,6 +10,8 @@
 
 // void swap(array& a);
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <array>
 #include <cassert>
 
diff --git a/test/std/containers/sequences/array/array.tuple/get.verify.cpp b/test/std/containers/sequences/array/array.tuple/get.verify.cpp
index d776d72..f3a425e 100644
--- a/test/std/containers/sequences/array/array.tuple/get.verify.cpp
+++ b/test/std/containers/sequences/array/array.tuple/get.verify.cpp
@@ -10,6 +10,8 @@
 
 // template <size_t I, class T, size_t N> T& get(array<T, N>& a);
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 // Prevent -Warray-bounds from issuing a diagnostic when testing with clang verify.
 // ADDITIONAL_COMPILE_FLAGS(gcc-style-warnings): -Wno-array-bounds
 
diff --git a/test/std/containers/sequences/array/array.tuple/tuple_element.verify.cpp b/test/std/containers/sequences/array/array.tuple/tuple_element.verify.cpp
index 168467a..b5c8522 100644
--- a/test/std/containers/sequences/array/array.tuple/tuple_element.verify.cpp
+++ b/test/std/containers/sequences/array/array.tuple/tuple_element.verify.cpp
@@ -10,6 +10,8 @@
 
 // tuple_element<I, array<T, N> >::type
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <array>
 #include <cassert>
 
diff --git a/test/std/containers/sequences/array/size_and_alignment.compile.pass.cpp b/test/std/containers/sequences/array/size_and_alignment.compile.pass.cpp
index 7ba5657..53356b4 100644
--- a/test/std/containers/sequences/array/size_and_alignment.compile.pass.cpp
+++ b/test/std/containers/sequences/array/size_and_alignment.compile.pass.cpp
@@ -14,6 +14,8 @@
 // Make sure std::array<T, N> has the correct object size and alignment.
 // This test is mostly meant to catch subtle ABI-breaking regressions.
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 // Ignore error about requesting a large alignment not being ABI compatible with older AIX systems.
 #if defined(_AIX)
 #  pragma clang diagnostic ignored "-Waix-compat"
diff --git a/test/std/containers/sequences/forwardlist/types.pass.cpp b/test/std/containers/sequences/forwardlist/types.pass.cpp
index 5476601..116891d 100644
--- a/test/std/containers/sequences/forwardlist/types.pass.cpp
+++ b/test/std/containers/sequences/forwardlist/types.pass.cpp
@@ -24,6 +24,8 @@
 //   ...
 // };
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <forward_list>
 #include <type_traits>
 
diff --git a/test/std/containers/sequences/list/types.pass.cpp b/test/std/containers/sequences/list/types.pass.cpp
index 0c0a127..a2d4908 100644
--- a/test/std/containers/sequences/list/types.pass.cpp
+++ b/test/std/containers/sequences/list/types.pass.cpp
@@ -21,6 +21,8 @@
 //     typedef typename allocator_type::pointer pointer;
 //     typedef typename allocator_type::const_pointer const_pointer;
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <list>
 #include <type_traits>
 
diff --git a/test/std/containers/sequences/vector/vector.cons/exceptions.pass.cpp b/test/std/containers/sequences/vector/vector.cons/exceptions.pass.cpp
index 679eec2..00de053 100644
--- a/test/std/containers/sequences/vector/vector.cons/exceptions.pass.cpp
+++ b/test/std/containers/sequences/vector/vector.cons/exceptions.pass.cpp
@@ -11,6 +11,8 @@
 // (bug report: https://llvm.org/PR58392)
 // Check that vector constructors don't leak memory when an operation inside the constructor throws an exception
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <cstddef>
 #include <memory>
 #include <type_traits>
diff --git a/test/std/input.output/file.streams/fstreams/fstream.cons/default.pass.cpp b/test/std/input.output/file.streams/fstreams/fstream.cons/default.pass.cpp
index d15276b..d2efaf1 100644
--- a/test/std/input.output/file.streams/fstreams/fstream.cons/default.pass.cpp
+++ b/test/std/input.output/file.streams/fstreams/fstream.cons/default.pass.cpp
@@ -13,6 +13,8 @@
 
 // basic_fstream();
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <fstream>
 
 #include "test_macros.h"
diff --git a/test/std/input.output/file.streams/fstreams/fstream.cons/move.pass.cpp b/test/std/input.output/file.streams/fstreams/fstream.cons/move.pass.cpp
index 95a04bd..1534878 100644
--- a/test/std/input.output/file.streams/fstreams/fstream.cons/move.pass.cpp
+++ b/test/std/input.output/file.streams/fstreams/fstream.cons/move.pass.cpp
@@ -13,6 +13,8 @@
 
 // basic_fstream(basic_fstream&& rhs);
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <fstream>
 #include <cassert>
 
diff --git a/test/std/input.output/file.streams/fstreams/fstream.cons/pointer.pass.cpp b/test/std/input.output/file.streams/fstreams/fstream.cons/pointer.pass.cpp
index 2e0ebcd..ca22624 100644
--- a/test/std/input.output/file.streams/fstreams/fstream.cons/pointer.pass.cpp
+++ b/test/std/input.output/file.streams/fstreams/fstream.cons/pointer.pass.cpp
@@ -18,6 +18,8 @@
 
 // XFAIL: LIBCXX-AIX-FIXME
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <fstream>
 #include <cassert>
 
diff --git a/test/std/input.output/file.streams/fstreams/fstream.cons/string.pass.cpp b/test/std/input.output/file.streams/fstreams/fstream.cons/string.pass.cpp
index ca0921a..28cefc7 100644
--- a/test/std/input.output/file.streams/fstreams/fstream.cons/string.pass.cpp
+++ b/test/std/input.output/file.streams/fstreams/fstream.cons/string.pass.cpp
@@ -13,6 +13,8 @@
 
 // explicit basic_fstream(const string& s, ios_base::openmode mode = ios_base::in|ios_base::out);
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <fstream>
 #include <cassert>
 
diff --git a/test/std/input.output/file.streams/fstreams/ifstream.cons/default.pass.cpp b/test/std/input.output/file.streams/fstreams/ifstream.cons/default.pass.cpp
index 70d1efc..256380d 100644
--- a/test/std/input.output/file.streams/fstreams/ifstream.cons/default.pass.cpp
+++ b/test/std/input.output/file.streams/fstreams/ifstream.cons/default.pass.cpp
@@ -13,6 +13,8 @@
 
 // basic_ifstream();
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <fstream>
 
 #include "test_macros.h"
diff --git a/test/std/input.output/file.streams/fstreams/ifstream.cons/move.pass.cpp b/test/std/input.output/file.streams/fstreams/ifstream.cons/move.pass.cpp
index 81ec800..c8be388 100644
--- a/test/std/input.output/file.streams/fstreams/ifstream.cons/move.pass.cpp
+++ b/test/std/input.output/file.streams/fstreams/ifstream.cons/move.pass.cpp
@@ -8,6 +8,8 @@
 
 // FILE_DEPENDENCIES: test.dat
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 // <fstream>
 
 // template <class charT, class traits = char_traits<charT> >
diff --git a/test/std/input.output/file.streams/fstreams/ifstream.cons/pointer.pass.cpp b/test/std/input.output/file.streams/fstreams/ifstream.cons/pointer.pass.cpp
index 6bbe6f1..711ab2a 100644
--- a/test/std/input.output/file.streams/fstreams/ifstream.cons/pointer.pass.cpp
+++ b/test/std/input.output/file.streams/fstreams/ifstream.cons/pointer.pass.cpp
@@ -8,6 +8,8 @@
 
 // FILE_DEPENDENCIES: test.dat
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 // <fstream>
 
 // template <class charT, class traits = char_traits<charT> >
diff --git a/test/std/input.output/file.streams/fstreams/ifstream.cons/string.pass.cpp b/test/std/input.output/file.streams/fstreams/ifstream.cons/string.pass.cpp
index e1a9b53..d4bbb3c 100644
--- a/test/std/input.output/file.streams/fstreams/ifstream.cons/string.pass.cpp
+++ b/test/std/input.output/file.streams/fstreams/ifstream.cons/string.pass.cpp
@@ -15,6 +15,8 @@
 
 // explicit basic_ifstream(const string& s, ios_base::openmode mode = ios_base::in);
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <fstream>
 #include <cassert>
 
diff --git a/test/std/input.output/file.streams/fstreams/ofstream.cons/default.pass.cpp b/test/std/input.output/file.streams/fstreams/ofstream.cons/default.pass.cpp
index a7b0918..4cda1db 100644
--- a/test/std/input.output/file.streams/fstreams/ofstream.cons/default.pass.cpp
+++ b/test/std/input.output/file.streams/fstreams/ofstream.cons/default.pass.cpp
@@ -13,6 +13,8 @@
 
 // basic_ofstream();
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <fstream>
 
 #include "test_macros.h"
diff --git a/test/std/input.output/file.streams/fstreams/ofstream.cons/move.pass.cpp b/test/std/input.output/file.streams/fstreams/ofstream.cons/move.pass.cpp
index ec02fa2..501a4c9 100644
--- a/test/std/input.output/file.streams/fstreams/ofstream.cons/move.pass.cpp
+++ b/test/std/input.output/file.streams/fstreams/ofstream.cons/move.pass.cpp
@@ -13,6 +13,8 @@
 
 // basic_ofstream(basic_ofstream&& rhs);
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <fstream>
 #include <cassert>
 
diff --git a/test/std/input.output/file.streams/fstreams/ofstream.cons/pointer.pass.cpp b/test/std/input.output/file.streams/fstreams/ofstream.cons/pointer.pass.cpp
index fbb03f1..1b5a55d 100644
--- a/test/std/input.output/file.streams/fstreams/ofstream.cons/pointer.pass.cpp
+++ b/test/std/input.output/file.streams/fstreams/ofstream.cons/pointer.pass.cpp
@@ -18,6 +18,8 @@
 
 // XFAIL: LIBCXX-AIX-FIXME
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <fstream>
 #include <cassert>
 #include <ios>
diff --git a/test/std/input.output/file.streams/fstreams/ofstream.cons/string.pass.cpp b/test/std/input.output/file.streams/fstreams/ofstream.cons/string.pass.cpp
index 33a7e9b..bb18c88 100644
--- a/test/std/input.output/file.streams/fstreams/ofstream.cons/string.pass.cpp
+++ b/test/std/input.output/file.streams/fstreams/ofstream.cons/string.pass.cpp
@@ -13,6 +13,8 @@
 
 // explicit basic_ofstream(const string& s, ios_base::openmode mode = ios_base::out);
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <fstream>
 #include <cassert>
 #include <ios>
diff --git a/test/std/input.output/iostreams.base/ios/basic.ios.members/copyfmt.pass.cpp b/test/std/input.output/iostreams.base/ios/basic.ios.members/copyfmt.pass.cpp
index d78f7df..7689221 100644
--- a/test/std/input.output/iostreams.base/ios/basic.ios.members/copyfmt.pass.cpp
+++ b/test/std/input.output/iostreams.base/ios/basic.ios.members/copyfmt.pass.cpp
@@ -15,6 +15,8 @@
 
 // basic_ios& copyfmt(const basic_ios& rhs);
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <ios>
 #include <memory>
 #include <streambuf>
diff --git a/test/std/input.output/string.streams/istringstream/istringstream.cons/default.pass.cpp b/test/std/input.output/string.streams/istringstream/istringstream.cons/default.pass.cpp
index 8c73df4..8cd23d4 100644
--- a/test/std/input.output/string.streams/istringstream/istringstream.cons/default.pass.cpp
+++ b/test/std/input.output/string.streams/istringstream/istringstream.cons/default.pass.cpp
@@ -15,6 +15,8 @@
 // basic_istringstream() : basic_istringstream(ios_base::in) {}           // C++20
 // explicit basic_istringstream(ios_base::openmode which);                // C++20
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <sstream>
 #include <cassert>
 
diff --git a/test/std/input.output/string.streams/istringstream/istringstream.cons/move.pass.cpp b/test/std/input.output/string.streams/istringstream/istringstream.cons/move.pass.cpp
index 00ac7cc..1af3304 100644
--- a/test/std/input.output/string.streams/istringstream/istringstream.cons/move.pass.cpp
+++ b/test/std/input.output/string.streams/istringstream/istringstream.cons/move.pass.cpp
@@ -13,6 +13,8 @@
 
 // basic_istringstream(basic_istringstream&& rhs);
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <sstream>
 #include <cassert>
 
diff --git a/test/std/input.output/string.streams/istringstream/istringstream.cons/string.pass.cpp b/test/std/input.output/string.streams/istringstream/istringstream.cons/string.pass.cpp
index 4a5965e..7755dd9 100644
--- a/test/std/input.output/string.streams/istringstream/istringstream.cons/string.pass.cpp
+++ b/test/std/input.output/string.streams/istringstream/istringstream.cons/string.pass.cpp
@@ -14,6 +14,8 @@
 // explicit basic_istringstream(const basic_string<charT,traits,allocator>& str,
 //                              ios_base::openmode which = ios_base::in);
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <sstream>
 #include <cassert>
 
diff --git a/test/std/input.output/string.streams/ostringstream/ostringstream.cons/default.pass.cpp b/test/std/input.output/string.streams/ostringstream/ostringstream.cons/default.pass.cpp
index a6b98a4..eb248a7 100644
--- a/test/std/input.output/string.streams/ostringstream/ostringstream.cons/default.pass.cpp
+++ b/test/std/input.output/string.streams/ostringstream/ostringstream.cons/default.pass.cpp
@@ -15,6 +15,8 @@
 // basic_ostringstream() : basic_ostringstream(ios_base::out) {}           // C++20
 // explicit basic_ostringstream(ios_base::openmode which);                 // C++20
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <sstream>
 #include <cassert>
 
diff --git a/test/std/input.output/string.streams/ostringstream/ostringstream.cons/move.pass.cpp b/test/std/input.output/string.streams/ostringstream/ostringstream.cons/move.pass.cpp
index 596a3e7..62ece7b 100644
--- a/test/std/input.output/string.streams/ostringstream/ostringstream.cons/move.pass.cpp
+++ b/test/std/input.output/string.streams/ostringstream/ostringstream.cons/move.pass.cpp
@@ -13,6 +13,8 @@
 
 // basic_ostringstream(basic_ostringstream&& rhs);
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <sstream>
 #include <cassert>
 
diff --git a/test/std/input.output/string.streams/ostringstream/ostringstream.cons/string.pass.cpp b/test/std/input.output/string.streams/ostringstream/ostringstream.cons/string.pass.cpp
index 9e9405a..bbec8f7 100644
--- a/test/std/input.output/string.streams/ostringstream/ostringstream.cons/string.pass.cpp
+++ b/test/std/input.output/string.streams/ostringstream/ostringstream.cons/string.pass.cpp
@@ -14,6 +14,8 @@
 // explicit basic_ostringstream(const basic_string<charT,traits,allocator>& str,
 //                              ios_base::openmode which = ios_base::in);
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <sstream>
 #include <cassert>
 
diff --git a/test/std/input.output/string.streams/stringbuf/stringbuf.cons/default.pass.cpp b/test/std/input.output/string.streams/stringbuf/stringbuf.cons/default.pass.cpp
index d131f5c..dac4396 100644
--- a/test/std/input.output/string.streams/stringbuf/stringbuf.cons/default.pass.cpp
+++ b/test/std/input.output/string.streams/stringbuf/stringbuf.cons/default.pass.cpp
@@ -15,6 +15,8 @@
 // basic_stringbuf() : basic_stringbuf(ios_base::in | ios_base::out) {}               // C++20
 // explicit basic_stringbuf(ios_base::openmode which);                                // C++20
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <sstream>
 #include <cassert>
 
diff --git a/test/std/input.output/string.streams/stringstream/stringstream.cons/default.pass.cpp b/test/std/input.output/string.streams/stringstream/stringstream.cons/default.pass.cpp
index 4f9e7e0..0e53581 100644
--- a/test/std/input.output/string.streams/stringstream/stringstream.cons/default.pass.cpp
+++ b/test/std/input.output/string.streams/stringstream/stringstream.cons/default.pass.cpp
@@ -15,6 +15,8 @@
 // basic_stringstream() : basic_stringstream(ios_base::out | ios_base::in) {}            // C++20
 // explicit basic_stringstream(ios_base::openmode which);                                // C++20
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <sstream>
 #include <cassert>
 
diff --git a/test/std/input.output/string.streams/stringstream/stringstream.cons/move.pass.cpp b/test/std/input.output/string.streams/stringstream/stringstream.cons/move.pass.cpp
index 0702d9a..e905f5f 100644
--- a/test/std/input.output/string.streams/stringstream/stringstream.cons/move.pass.cpp
+++ b/test/std/input.output/string.streams/stringstream/stringstream.cons/move.pass.cpp
@@ -13,6 +13,8 @@
 
 // basic_stringstream(basic_stringstream&& rhs);
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <sstream>
 #include <cassert>
 
diff --git a/test/std/input.output/string.streams/stringstream/stringstream.cons/string.pass.cpp b/test/std/input.output/string.streams/stringstream/stringstream.cons/string.pass.cpp
index 0888087..d4fe18a 100644
--- a/test/std/input.output/string.streams/stringstream/stringstream.cons/string.pass.cpp
+++ b/test/std/input.output/string.streams/stringstream/stringstream.cons/string.pass.cpp
@@ -14,6 +14,8 @@
 // explicit basic_stringstream(const basic_string<charT,traits,Allocator>& str,
 //                             ios_base::openmode which = ios_base::out|ios_base::in);
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <sstream>
 #include <cassert>
 
diff --git a/test/std/language.support/support.runtime/cstdalign.compile.pass.cpp b/test/std/language.support/support.runtime/cstdalign.compile.pass.cpp
index fbbaf9b..69296df 100644
--- a/test/std/language.support/support.runtime/cstdalign.compile.pass.cpp
+++ b/test/std/language.support/support.runtime/cstdalign.compile.pass.cpp
@@ -10,6 +10,8 @@
 
 // ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <cstdalign>
 
 #ifndef __alignas_is_defined
diff --git a/test/std/numerics/c.math/isnormal.pass.cpp b/test/std/numerics/c.math/isnormal.pass.cpp
index 76c3d13..03b086f 100644
--- a/test/std/numerics/c.math/isnormal.pass.cpp
+++ b/test/std/numerics/c.math/isnormal.pass.cpp
@@ -11,6 +11,8 @@
 // We don't control the implementation on windows
 // UNSUPPORTED: windows
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <cassert>
 #include <cmath>
 #include <limits>
diff --git a/test/std/numerics/c.math/signbit.pass.cpp b/test/std/numerics/c.math/signbit.pass.cpp
index a8a566f..cbad968 100644
--- a/test/std/numerics/c.math/signbit.pass.cpp
+++ b/test/std/numerics/c.math/signbit.pass.cpp
@@ -14,6 +14,8 @@
 // These compilers don't support constexpr `__builtin_signbit` yet.
 // UNSUPPORTED: clang-17, clang-18, clang-19, apple-clang-15, apple-clang-16
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <cassert>
 #include <cmath>
 #include <limits>
diff --git a/test/std/re/re.iter/re.tokiter/re.tokiter.cnstr/init.pass.cpp b/test/std/re/re.iter/re.tokiter/re.tokiter.cnstr/init.pass.cpp
index a508781..2f9f636 100644
--- a/test/std/re/re.iter/re.tokiter/re.tokiter.cnstr/init.pass.cpp
+++ b/test/std/re/re.iter/re.tokiter/re.tokiter.cnstr/init.pass.cpp
@@ -18,6 +18,8 @@
 //                      regex_constants::match_flag_type m =
 //                                              regex_constants::match_default);
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <regex>
 #include <cassert>
 #include <iterator>
diff --git a/test/std/strings/basic.string/char.bad.verify.cpp b/test/std/strings/basic.string/char.bad.verify.cpp
index bedc5f1..c206c1c 100644
--- a/test/std/strings/basic.string/char.bad.verify.cpp
+++ b/test/std/strings/basic.string/char.bad.verify.cpp
@@ -9,6 +9,8 @@
 // <string>
 //   ... manipulating sequences of any non-array trivial standard-layout types.
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <string>
 #include "test_traits.h"
 
diff --git a/test/std/strings/string.view/char.bad.verify.cpp b/test/std/strings/string.view/char.bad.verify.cpp
index 735e3e5..df91736 100644
--- a/test/std/strings/string.view/char.bad.verify.cpp
+++ b/test/std/strings/string.view/char.bad.verify.cpp
@@ -8,6 +8,8 @@
 
 // UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 // <string_view>
 //   ... manipulating sequences of any non-array trivial standard-layout types.
 
diff --git a/test/std/utilities/template.bitset/bitset.members/nonstdmem.uglified.compile.pass.cpp b/test/std/utilities/template.bitset/bitset.members/nonstdmem.uglified.compile.pass.cpp
index f1daa7c..ae3ac81 100644
--- a/test/std/utilities/template.bitset/bitset.members/nonstdmem.uglified.compile.pass.cpp
+++ b/test/std/utilities/template.bitset/bitset.members/nonstdmem.uglified.compile.pass.cpp
@@ -13,6 +13,8 @@
 //
 // See https://github.com/llvm/llvm-project/issues/111125.
 
+// XFAIL: FROZEN-CXX03-HEADERS-FIXME
+
 #include <cstddef>
 #include <bitset>
 #include <type_traits>
diff --git a/test/support/test_macros.h b/test/support/test_macros.h
index 7f50282..676c865 100644
--- a/test/support/test_macros.h
+++ b/test/support/test_macros.h
@@ -214,7 +214,11 @@
 #define TEST_IS_EXECUTED_IN_A_SLOW_ENVIRONMENT
 #endif
 
-#if defined(_LIBCPP_VERSION) && !_LIBCPP_HAS_ALIGNED_ALLOCATION
+#ifdef _LIBCPP_USE_FROZEN_CXX03_HEADERS
+#  ifdef _LIBCPP_HAS_NO_ALIGNED_ALLOCATION
+#    define TEST_HAS_NO_ALIGNED_ALLOCATION
+#  endif
+#elif defined(_LIBCPP_VERSION) && !_LIBCPP_HAS_ALIGNED_ALLOCATION
 #  define TEST_HAS_NO_ALIGNED_ALLOCATION
 #elif TEST_STD_VER < 17 && (!defined(__cpp_aligned_new) || __cpp_aligned_new < 201606L)
 #  define TEST_HAS_NO_ALIGNED_ALLOCATION
@@ -262,7 +266,9 @@
 
 #define TEST_IGNORE_NODISCARD (void)
 
-#if !defined(_LIBCPP_VERSION) || _LIBCPP_AVAILABILITY_HAS_FROM_CHARS_FLOATING_POINT
+#ifdef _LIBCPP_USE_FROZEN_CXX03_HEADERS
+// from-chars is a C++17 feature, so it's never available anyways
+#elif !defined(_LIBCPP_VERSION) || _LIBCPP_AVAILABILITY_HAS_FROM_CHARS_FLOATING_POINT
 #  define TEST_HAS_FROM_CHARS_FLOATING_POINT
 #endif
 
@@ -401,11 +407,19 @@
 #  define TEST_HAS_NO_UNICODE
 #endif
 
-#if defined(_LIBCPP_VERSION) && _LIBCPP_HAS_OPEN_WITH_WCHAR
+#ifdef _LIBCPP_USE_FROZEN_CXX03_HEADERS
+#  ifdef _LIBCPP_HAS_OPEN_WITH_WCHAR
+#    define TEST_HAS_OPEN_WITH_WCHAR
+#  endif
+#elif defined(_LIBCPP_VERSION) && _LIBCPP_HAS_OPEN_WITH_WCHAR
 #  define TEST_HAS_OPEN_WITH_WCHAR
 #endif
 
-#if (defined(_LIBCPP_VERSION) && !_LIBCPP_HAS_INT128) || defined(_MSVC_STL_VERSION)
+#ifdef _LIBCPP_USE_FROZEN_CXX03_HEADERS
+#  ifdef _LIBCPP_HAS_NO_INT128
+#    define TEST_HAS_NO_INT128
+#  endif
+#elif (defined(_LIBCPP_VERSION) && !_LIBCPP_HAS_INT128) || defined(_MSVC_STL_VERSION)
 #  define TEST_HAS_NO_INT128
 #endif
 
@@ -425,7 +439,11 @@
 #  define TEST_HAS_NO_FILESYSTEM
 #endif
 
-#if defined(_LIBCPP_VERSION) && !_LIBCPP_HAS_C8RTOMB_MBRTOC8
+#ifdef _LIBCPP_USE_FROZEN_CXX03_HEADERS
+#  ifdef _LIBCPP_HAS_NO_C8RTOMB_MBRTOC8
+#    define TEST_HAS_NO_C8RTOMB_MBRTOC8
+#  endif
+#elif defined(_LIBCPP_VERSION) && !_LIBCPP_HAS_C8RTOMB_MBRTOC8
 #  define TEST_HAS_NO_C8RTOMB_MBRTOC8
 #endif
 
@@ -499,7 +517,9 @@
 #endif
 
 // Clang-18 has support for deducing this, but it does not set the FTM.
-#if defined(_LIBCPP_VERSION) && _LIBCPP_HAS_EXPLICIT_THIS_PARAMETER
+#ifdef _LIBCPP_USE_FROZEN_CXX03_HEADERS
+// This is a C++20 featue, so we don't care whether the compiler could support it
+#elif defined(_LIBCPP_VERSION) && _LIBCPP_HAS_EXPLICIT_THIS_PARAMETER
 #  define TEST_HAS_EXPLICIT_THIS_PARAMETER
 #endif
 
diff --git a/test/tools/clang_tidy_checks/proper_version_checks.cpp b/test/tools/clang_tidy_checks/proper_version_checks.cpp
index 15093a4..ebd0d88 100644
--- a/test/tools/clang_tidy_checks/proper_version_checks.cpp
+++ b/test/tools/clang_tidy_checks/proper_version_checks.cpp
@@ -39,6 +39,9 @@
     if (preprocessor_.getSourceManager().isInMainFile(location))
       return;
 
+    if (condition == "__cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)")
+      return;
+
     if (condition.starts_with("_LIBCPP_STD_VER") && condition.find(">") != std::string_view::npos &&
         condition.find(">=") == std::string_view::npos)
       check_.diag(location, "_LIBCPP_STD_VER >= version should be used instead of _LIBCPP_STD_VER > prev_version");
diff --git a/utils/ci/run-buildbot b/utils/ci/run-buildbot
index a832380..f1ede64 100755
--- a/utils/ci/run-buildbot
+++ b/utils/ci/run-buildbot
@@ -281,6 +281,12 @@
 #
 # Various Standard modes
 #
+frozen-cxx03-headers)
+    clean
+    generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-cxx03-frozen.cmake"
+    check-runtimes
+    check-abi-list
+;;
 generic-cxx03)
     clean
     generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-cxx03.cmake"
diff --git a/utils/generate_feature_test_macro_components.py b/utils/generate_feature_test_macro_components.py
index 0b5c0f1..a2ce698 100755
--- a/utils/generate_feature_test_macro_components.py
+++ b/utils/generate_feature_test_macro_components.py
@@ -1629,16 +1629,21 @@
 
 */
 
-#include <__config>
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/version>
+#else
+#  include <__config>
 
-#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
-#  pragma GCC system_header
-#endif
+#  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#    pragma GCC system_header
+#  endif
 
 // clang-format off
 
 {cxx_macros}
 
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+
 // clang-format on
 
 #endif // _LIBCPP_VERSIONH
diff --git a/utils/libcxx/test/params.py b/utils/libcxx/test/params.py
index 2c5cb16..947cfd2 100644
--- a/utils/libcxx/test/params.py
+++ b/utils/libcxx/test/params.py
@@ -448,5 +448,12 @@
             AddSubstitution('%{clang-tidy}', exe),
         ]
     ),
+    Parameter(
+        name='test_frozen_cxx03_headers',
+        type=bool,
+        default=False,
+        help="Whether to test the main or C++03-specific headers. Only changes behaviour when std=c++03.",
+        actions=lambda enabled: [] if not enabled else [AddFlag("-D_LIBCPP_USE_FROZEN_CXX03_HEADERS"), AddFeature("FROZEN-CXX03-HEADERS-FIXME")],
+    ),
 ]
 # fmt: on
diff --git a/vendor/llvm/default_assertion_handler.in b/vendor/llvm/default_assertion_handler.in
index e12cccc..1d6b21f 100644
--- a/vendor/llvm/default_assertion_handler.in
+++ b/vendor/llvm/default_assertion_handler.in
@@ -10,8 +10,13 @@
 #ifndef _LIBCPP___ASSERTION_HANDLER
 #define _LIBCPP___ASSERTION_HANDLER
 
-#include <__config>
-#include <__verbose_abort>
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/__config>
+#  include <__cxx03/__verbose_abort>
+#else
+#  include <__config>
+#  include <__verbose_abort>
+#endif
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header