[libc++] Disable incomplete library features.

Adds a new CMake option to disable the usage of incomplete headers.
These incomplete headers are not guaranteed to be ABI stable. This
option is intended to be used by vendors so they can avoid their users
from code that's not ready for production usage.

The option is enabled by default.

Differential Revision: https://reviews.llvm.org/D106763

155 files changed, 213 insertions, 7 deletions

diff --git a/libcxx/CMakeLists.txt b/libcxx/CMakeLists.txt
index 80c240d..b1e2535 100644
--- a/libcxx/CMakeLists.txt
+++ b/libcxx/CMakeLists.txt
@@ -123,6 +123,11 @@ option(LIBCXX_ENABLE_VENDOR_AVAILABILITY_ANNOTATIONS
    to provide compile-time errors when using features unavailable on some version of
    the shared library they shipped should turn this on and see `include/__availability`
    for more details." OFF)
+option(LIBCXX_ENABLE_INCOMPLETE_FEATURES
+    "Whether to enable support for incomplete library features. Incomplete features
+    are new library features under development. These features don't guarantee
+    ABI stability nor the quality of completed library features. Vendors
+    shipping the library may want to disable this option." ON)
 set(LIBCXX_TEST_CONFIG "${CMAKE_CURRENT_SOURCE_DIR}/test/configs/legacy.cfg.in" CACHE STRING
     "The Lit testing configuration to use when running the tests.")
 set(LIBCXX_TEST_PARAMS "" CACHE STRING
@@ -883,6 +888,10 @@ config_define_if_not(LIBCXX_ENABLE_FILESYSTEM _LIBCPP_HAS_NO_FILESYSTEM_LIBRARY)
 config_define_if_not(LIBCXX_ENABLE_RANDOM_DEVICE _LIBCPP_HAS_NO_RANDOM_DEVICE)
 config_define_if_not(LIBCXX_ENABLE_LOCALIZATION _LIBCPP_HAS_NO_LOCALIZATION)
 config_define_if_not(LIBCXX_ENABLE_VENDOR_AVAILABILITY_ANNOTATIONS _LIBCPP_HAS_NO_VENDOR_AVAILABILITY_ANNOTATIONS)
+# Incomplete features get their own specific disabling flags. This makes it
+# easier to grep for target specific flags once the feature is complete.
+config_define_if_not(LIBCXX_ENABLE_INCOMPLETE_FEATURES _LIBCPP_HAS_NO_INCOMPLETE_FORMAT)
+config_define_if_not(LIBCXX_ENABLE_INCOMPLETE_FEATURES _LIBCPP_HAS_NO_INCOMPLETE_RANGES)
 
 if (LIBCXX_ABI_DEFINES)
   set(abi_defines)
diff --git a/libcxx/cmake/caches/Apple.cmake b/libcxx/cmake/caches/Apple.cmake
index d40a3bf..c884eb5 100644
--- a/libcxx/cmake/caches/Apple.cmake
+++ b/libcxx/cmake/caches/Apple.cmake
@@ -11,6 +11,7 @@ set(LIBCXX_CXX_ABI libcxxabi CACHE STRING "")
 set(LIBCXX_HIDE_FROM_ABI_PER_TU_BY_DEFAULT ON CACHE BOOL "")
 set(LIBCXX_ENABLE_DEBUG_MODE_SUPPORT OFF CACHE BOOL "")
 set(LIBCXX_ENABLE_VENDOR_AVAILABILITY_ANNOTATIONS ON CACHE BOOL "")
+set(LIBCXX_ENABLE_INCOMPLETE_FEATURES OFF CACHE BOOL "")
 
 set(LIBCXX_HERMETIC_STATIC_LIBRARY ON CACHE BOOL "")
 set(LIBCXXABI_HERMETIC_STATIC_LIBRARY ON CACHE BOOL "")
diff --git a/libcxx/docs/BuildingLibcxx.rst b/libcxx/docs/BuildingLibcxx.rst
index 34e82f2..399f00b 100644
--- a/libcxx/docs/BuildingLibcxx.rst
+++ b/libcxx/docs/BuildingLibcxx.rst
@@ -251,6 +251,15 @@ libc++ specific options
    This option can be used to enable or disable the filesystem components on
    platforms that may not support them. For example on Windows.
 
+.. option:: LIBCXX_ENABLE_INCOMPLETE_FEATURES:BOOL
+
+  **Default**: ``ON``
+
+  Whether to enable support for incomplete library features. Incomplete features
+  are new library features under development. These features don't guarantee
+  ABI stability nor the quality of completed library features. Vendors
+  shipping the library may want to disable this option.
+
 .. option:: LIBCXX_INSTALL_LIBRARY_DIR:PATH
 
   **Default**: ``lib${LIBCXX_LIBDIR_SUFFIX}``
diff --git a/libcxx/include/__config_site.in b/libcxx/include/__config_site.in
index ec4d410..e202d92 100644
--- a/libcxx/include/__config_site.in
+++ b/libcxx/include/__config_site.in
@@ -34,6 +34,8 @@
 #cmakedefine _LIBCPP_HAS_PARALLEL_ALGORITHMS
 #cmakedefine _LIBCPP_HAS_NO_RANDOM_DEVICE
 #cmakedefine _LIBCPP_HAS_NO_LOCALIZATION
+#cmakedefine _LIBCPP_HAS_NO_INCOMPLETE_FORMAT
+#cmakedefine _LIBCPP_HAS_NO_INCOMPLETE_RANGES
 
 @_LIBCPP_ABI_DEFINES@
 
diff --git a/libcxx/include/format b/libcxx/include/format
index d3945f0..0ec4b85 100644
--- a/libcxx/include/format
+++ b/libcxx/include/format
@@ -60,6 +60,10 @@ namespace std {
 #include <__format/format_parse_context.h>
 #include <version>
 
+#if defined(_LIBCPP_HAS_NO_INCOMPLETE_FORMAT)
+# error "The Format library is not supported since libc++ has been configured with LIBCXX_ENABLE_INCOMPLETE_FEATURES disabled"
+#endif
+
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #  pragma GCC system_header
 #endif
diff --git a/libcxx/include/ranges b/libcxx/include/ranges
index e97e565..47f66fd 100644
--- a/libcxx/include/ranges
+++ b/libcxx/include/ranges
@@ -183,6 +183,10 @@ namespace std::ranges {
 #include <type_traits>
 #include <version>
 
+#if defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES)
+# error "The Ranges library is not supported since libc++ has been configured with LIBCXX_ENABLE_INCOMPLETE_FEATURES disabled"
+#endif
+
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
 #pragma GCC system_header
 #endif
diff --git a/libcxx/src/CMakeLists.txt b/libcxx/src/CMakeLists.txt
index f8c4d3e..496429f 100644
--- a/libcxx/src/CMakeLists.txt
+++ b/libcxx/src/CMakeLists.txt
@@ -12,7 +12,6 @@ set(LIBCXX_SOURCES
   condition_variable.cpp
   condition_variable_destructor.cpp
   exception.cpp
-  format.cpp
   functional.cpp
   future.cpp
   hash.cpp
@@ -74,6 +73,12 @@ if (LIBCXX_ENABLE_LOCALIZATION)
     )
 endif()
 
+if(LIBCXX_ENABLE_INCOMPLETE_FEATURES)
+  list(APPEND LIBCXX_SOURCES
+    format.cpp
+  )
+endif()
+
 if(WIN32)
   list(APPEND LIBCXX_SOURCES
     support/win32/locale_win32.cpp
diff --git a/libcxx/test/libcxx/double_include.sh.cpp b/libcxx/test/libcxx/double_include.sh.cpp
index eb9de0b..0687406 100644
--- a/libcxx/test/libcxx/double_include.sh.cpp
+++ b/libcxx/test/libcxx/double_include.sh.cpp
@@ -91,7 +91,9 @@
 #    include <filesystem>
 #endif
 #include <float.h>
-#include <format>
+#ifndef _LIBCPP_HAS_NO_INCOMPLETE_FORMAT
+#    include <format>
+#endif
 #include <forward_list>
 #ifndef _LIBCPP_HAS_NO_LOCALIZATION
 #    include <fstream>
@@ -143,7 +145,9 @@
 #endif
 #include <queue>
 #include <random>
-#include <ranges>
+#ifndef _LIBCPP_HAS_NO_INCOMPLETE_RANGES
+#    include <ranges>
+#endif
 #include <ratio>
 #ifndef _LIBCPP_HAS_NO_LOCALIZATION
 #    include <regex>
diff --git a/libcxx/test/libcxx/inclusions/ranges.inclusions.compile.pass.cpp b/libcxx/test/libcxx/inclusions/ranges.inclusions.compile.pass.cpp
index 316d141..b6be285 100644
--- a/libcxx/test/libcxx/inclusions/ranges.inclusions.compile.pass.cpp
+++ b/libcxx/test/libcxx/inclusions/ranges.inclusions.compile.pass.cpp
@@ -12,6 +12,7 @@
 // clang-format off
 
 // UNSUPPORTED: c++03, c++11, c++14, c++17
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // <ranges>
 
diff --git a/libcxx/test/libcxx/min_max_macros.compile.pass.cpp b/libcxx/test/libcxx/min_max_macros.compile.pass.cpp
index 520fd3c..4c643d0 100644
--- a/libcxx/test/libcxx/min_max_macros.compile.pass.cpp
+++ b/libcxx/test/libcxx/min_max_macros.compile.pass.cpp
@@ -136,8 +136,10 @@ TEST_MACROS();
 #endif
 #include <float.h>
 TEST_MACROS();
-#include <format>
+#ifndef _LIBCPP_HAS_NO_INCOMPLETE_FORMAT
+#    include <format>
 TEST_MACROS();
+#endif
 #include <forward_list>
 TEST_MACROS();
 #ifndef _LIBCPP_HAS_NO_LOCALIZATION
@@ -218,8 +220,10 @@ TEST_MACROS();
 TEST_MACROS();
 #include <random>
 TEST_MACROS();
-#include <ranges>
+#ifndef _LIBCPP_HAS_NO_INCOMPLETE_RANGES
+#    include <ranges>
 TEST_MACROS();
+#endif
 #include <ratio>
 TEST_MACROS();
 #ifndef _LIBCPP_HAS_NO_LOCALIZATION
diff --git a/libcxx/test/libcxx/no_assert_include.compile.pass.cpp b/libcxx/test/libcxx/no_assert_include.compile.pass.cpp
index 60839d5..4269e3e 100644
--- a/libcxx/test/libcxx/no_assert_include.compile.pass.cpp
+++ b/libcxx/test/libcxx/no_assert_include.compile.pass.cpp
@@ -84,7 +84,9 @@
 #    include <filesystem>
 #endif
 #include <float.h>
-#include <format>
+#ifndef _LIBCPP_HAS_NO_INCOMPLETE_FORMAT
+#    include <format>
+#endif
 #include <forward_list>
 #ifndef _LIBCPP_HAS_NO_LOCALIZATION
 #    include <fstream>
@@ -136,7 +138,9 @@
 #endif
 #include <queue>
 #include <random>
-#include <ranges>
+#ifndef _LIBCPP_HAS_NO_INCOMPLETE_RANGES
+#    include <ranges>
+#endif
 #include <ratio>
 #ifndef _LIBCPP_HAS_NO_LOCALIZATION
 #    include <regex>
diff --git a/libcxx/test/libcxx/ranges/range.adaptors/range.copy.wrap/assign.copy.pass.cpp b/libcxx/test/libcxx/ranges/range.adaptors/range.copy.wrap/assign.copy.pass.cpp
index cfa0857..cdd2487 100644
--- a/libcxx/test/libcxx/ranges/range.adaptors/range.copy.wrap/assign.copy.pass.cpp
+++ b/libcxx/test/libcxx/ranges/range.adaptors/range.copy.wrap/assign.copy.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // <copyable-box>& operator=(<copyable-box> const&)
 
diff --git a/libcxx/test/libcxx/ranges/range.adaptors/range.copy.wrap/assign.move.pass.cpp b/libcxx/test/libcxx/ranges/range.adaptors/range.copy.wrap/assign.move.pass.cpp
index 7fbb7df..37cec07 100644
--- a/libcxx/test/libcxx/ranges/range.adaptors/range.copy.wrap/assign.move.pass.cpp
+++ b/libcxx/test/libcxx/ranges/range.adaptors/range.copy.wrap/assign.move.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // <copyable-box>& operator=(<copyable-box>&&)
 
diff --git a/libcxx/test/libcxx/ranges/range.adaptors/range.copy.wrap/ctor.default.pass.cpp b/libcxx/test/libcxx/ranges/range.adaptors/range.copy.wrap/ctor.default.pass.cpp
index e236d59..bca937d 100644
--- a/libcxx/test/libcxx/ranges/range.adaptors/range.copy.wrap/ctor.default.pass.cpp
+++ b/libcxx/test/libcxx/ranges/range.adaptors/range.copy.wrap/ctor.default.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // <copyable-box>::<copyable-box>()
 
diff --git a/libcxx/test/libcxx/ranges/range.adaptors/range.copy.wrap/ctor.in_place.pass.cpp b/libcxx/test/libcxx/ranges/range.adaptors/range.copy.wrap/ctor.in_place.pass.cpp
index 9018e72..512088c 100644
--- a/libcxx/test/libcxx/ranges/range.adaptors/range.copy.wrap/ctor.in_place.pass.cpp
+++ b/libcxx/test/libcxx/ranges/range.adaptors/range.copy.wrap/ctor.in_place.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // template<class ...Args>
 // explicit <copyable-box>::<copyable-box>(in_place_t, Args&& ...args);
diff --git a/libcxx/test/libcxx/ranges/range.adaptors/range.copy.wrap/deref.pass.cpp b/libcxx/test/libcxx/ranges/range.adaptors/range.copy.wrap/deref.pass.cpp
index 261bef2..c23438d 100644
--- a/libcxx/test/libcxx/ranges/range.adaptors/range.copy.wrap/deref.pass.cpp
+++ b/libcxx/test/libcxx/ranges/range.adaptors/range.copy.wrap/deref.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // T& <copyable-box>::operator*()
 // T const& <copyable-box>::operator*() const
diff --git a/libcxx/test/libcxx/ranges/range.adaptors/range.copy.wrap/has_value.pass.cpp b/libcxx/test/libcxx/ranges/range.adaptors/range.copy.wrap/has_value.pass.cpp
index 705309d..d99d509 100644
--- a/libcxx/test/libcxx/ranges/range.adaptors/range.copy.wrap/has_value.pass.cpp
+++ b/libcxx/test/libcxx/ranges/range.adaptors/range.copy.wrap/has_value.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // bool <copyable-box>::__has_value() const
 
diff --git a/libcxx/test/libcxx/ranges/range.adaptors/range.copy.wrap/no_unique_address.pass.cpp b/libcxx/test/libcxx/ranges/range.adaptors/range.copy.wrap/no_unique_address.pass.cpp
index b8b5537..32e1e87 100644
--- a/libcxx/test/libcxx/ranges/range.adaptors/range.copy.wrap/no_unique_address.pass.cpp
+++ b/libcxx/test/libcxx/ranges/range.adaptors/range.copy.wrap/no_unique_address.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // This test ensures that <copyable-box> behaves correctly when it holds an empty type.
 
diff --git a/libcxx/test/libcxx/ranges/range.adaptors/range.copy.wrap/properties.compile.pass.cpp b/libcxx/test/libcxx/ranges/range.adaptors/range.copy.wrap/properties.compile.pass.cpp
index 3602a63..01bc638 100644
--- a/libcxx/test/libcxx/ranges/range.adaptors/range.copy.wrap/properties.compile.pass.cpp
+++ b/libcxx/test/libcxx/ranges/range.adaptors/range.copy.wrap/properties.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // Test various properties of <copyable-box>
 
diff --git a/libcxx/test/libcxx/ranges/range.nonprop.cache/assign.copy.pass.cpp b/libcxx/test/libcxx/ranges/range.nonprop.cache/assign.copy.pass.cpp
index cc574e0..a0021eb 100644
--- a/libcxx/test/libcxx/ranges/range.nonprop.cache/assign.copy.pass.cpp
+++ b/libcxx/test/libcxx/ranges/range.nonprop.cache/assign.copy.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // __non_propagating_cache& operator=(__non_propagating_cache const&);
 
diff --git a/libcxx/test/libcxx/ranges/range.nonprop.cache/assign.move.pass.cpp b/libcxx/test/libcxx/ranges/range.nonprop.cache/assign.move.pass.cpp
index 0a54e8c..6f4662e 100644
--- a/libcxx/test/libcxx/ranges/range.nonprop.cache/assign.move.pass.cpp
+++ b/libcxx/test/libcxx/ranges/range.nonprop.cache/assign.move.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // __non_propagating_cache& operator=(__non_propagating_cache&&);
 
diff --git a/libcxx/test/libcxx/ranges/range.nonprop.cache/constraints.compile.pass.cpp b/libcxx/test/libcxx/ranges/range.nonprop.cache/constraints.compile.pass.cpp
index ba9be62..5014171 100644
--- a/libcxx/test/libcxx/ranges/range.nonprop.cache/constraints.compile.pass.cpp
+++ b/libcxx/test/libcxx/ranges/range.nonprop.cache/constraints.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // template<class T>
 //  requires is_object_v<T>
diff --git a/libcxx/test/libcxx/ranges/range.nonprop.cache/ctor.copy.pass.cpp b/libcxx/test/libcxx/ranges/range.nonprop.cache/ctor.copy.pass.cpp
index e1fadb3..027b0a2 100644
--- a/libcxx/test/libcxx/ranges/range.nonprop.cache/ctor.copy.pass.cpp
+++ b/libcxx/test/libcxx/ranges/range.nonprop.cache/ctor.copy.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // __non_propagating_cache(__non_propagating_cache const&);
 
diff --git a/libcxx/test/libcxx/ranges/range.nonprop.cache/ctor.default.pass.cpp b/libcxx/test/libcxx/ranges/range.nonprop.cache/ctor.default.pass.cpp
index 6ab9c2c..871cb25 100644
--- a/libcxx/test/libcxx/ranges/range.nonprop.cache/ctor.default.pass.cpp
+++ b/libcxx/test/libcxx/ranges/range.nonprop.cache/ctor.default.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // __non_propagating_cache();
 
diff --git a/libcxx/test/libcxx/ranges/range.nonprop.cache/ctor.move.pass.cpp b/libcxx/test/libcxx/ranges/range.nonprop.cache/ctor.move.pass.cpp
index c4dac84..6c3fbb3 100644
--- a/libcxx/test/libcxx/ranges/range.nonprop.cache/ctor.move.pass.cpp
+++ b/libcxx/test/libcxx/ranges/range.nonprop.cache/ctor.move.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // __non_propagating_cache(__non_propagating_cache&&);
 
diff --git a/libcxx/test/libcxx/ranges/range.nonprop.cache/deref.pass.cpp b/libcxx/test/libcxx/ranges/range.nonprop.cache/deref.pass.cpp
index 53baf35..18c0ce2 100644
--- a/libcxx/test/libcxx/ranges/range.nonprop.cache/deref.pass.cpp
+++ b/libcxx/test/libcxx/ranges/range.nonprop.cache/deref.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // constexpr T const& operator*() const;
 // constexpr T& operator*();
diff --git a/libcxx/test/libcxx/ranges/range.nonprop.cache/has_value.pass.cpp b/libcxx/test/libcxx/ranges/range.nonprop.cache/has_value.pass.cpp
index 873b7a7..fdffefd 100644
--- a/libcxx/test/libcxx/ranges/range.nonprop.cache/has_value.pass.cpp
+++ b/libcxx/test/libcxx/ranges/range.nonprop.cache/has_value.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // constexpr bool __has_value() const;
 
diff --git a/libcxx/test/libcxx/ranges/range.utility.helpers/different_from.compile.pass.cpp b/libcxx/test/libcxx/ranges/range.utility.helpers/different_from.compile.pass.cpp
index ecea0ee..f517a82 100644
--- a/libcxx/test/libcxx/ranges/range.utility.helpers/different_from.compile.pass.cpp
+++ b/libcxx/test/libcxx/ranges/range.utility.helpers/different_from.compile.pass.cpp
@@ -11,6 +11,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 #include <ranges>
 
diff --git a/libcxx/test/libcxx/ranges/range.utility.helpers/has_arrow.compile.pass.cpp b/libcxx/test/libcxx/ranges/range.utility.helpers/has_arrow.compile.pass.cpp
index 889cf8b..e24854d 100644
--- a/libcxx/test/libcxx/ranges/range.utility.helpers/has_arrow.compile.pass.cpp
+++ b/libcxx/test/libcxx/ranges/range.utility.helpers/has_arrow.compile.pass.cpp
@@ -11,6 +11,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 #include <ranges>
 
diff --git a/libcxx/test/libcxx/ranges/range.utility.helpers/simple_view.compile.pass.cpp b/libcxx/test/libcxx/ranges/range.utility.helpers/simple_view.compile.pass.cpp
index c544d92..f7a5df1 100644
--- a/libcxx/test/libcxx/ranges/range.utility.helpers/simple_view.compile.pass.cpp
+++ b/libcxx/test/libcxx/ranges/range.utility.helpers/simple_view.compile.pass.cpp
@@ -11,6 +11,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 #include <ranges>
 
diff --git a/libcxx/test/libcxx/ranges/version.compile.pass.cpp b/libcxx/test/libcxx/ranges/version.compile.pass.cpp
index 817b9ee..16a2b58 100644
--- a/libcxx/test/libcxx/ranges/version.compile.pass.cpp
+++ b/libcxx/test/libcxx/ranges/version.compile.pass.cpp
@@ -6,6 +6,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
+
 // <ranges>
 
 #include <ranges>
diff --git a/libcxx/test/libcxx/utilities/format/version.compile.pass.cpp b/libcxx/test/libcxx/utilities/format/version.compile.pass.cpp
index e61f58f..4c1be77 100644
--- a/libcxx/test/libcxx/utilities/format/version.compile.pass.cpp
+++ b/libcxx/test/libcxx/utilities/format/version.compile.pass.cpp
@@ -6,6 +6,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// UNSUPPORTED: libcpp-has-no-incomplete-format
+
 // <format>
 
 #include <format>
diff --git a/libcxx/test/std/containers/associative/map/range_concept_conformance.compile.pass.cpp b/libcxx/test/std/containers/associative/map/range_concept_conformance.compile.pass.cpp
index b098f05..9d80747 100644
--- a/libcxx/test/std/containers/associative/map/range_concept_conformance.compile.pass.cpp
+++ b/libcxx/test/std/containers/associative/map/range_concept_conformance.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // map
 
diff --git a/libcxx/test/std/containers/associative/multimap/range_concept_conformance.compile.pass.cpp b/libcxx/test/std/containers/associative/multimap/range_concept_conformance.compile.pass.cpp
index 9362e25..07fc67c 100644
--- a/libcxx/test/std/containers/associative/multimap/range_concept_conformance.compile.pass.cpp
+++ b/libcxx/test/std/containers/associative/multimap/range_concept_conformance.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // multimap
 
diff --git a/libcxx/test/std/containers/associative/multiset/range_concept_conformance.compile.pass.cpp b/libcxx/test/std/containers/associative/multiset/range_concept_conformance.compile.pass.cpp
index 417e19d..bf97de8 100644
--- a/libcxx/test/std/containers/associative/multiset/range_concept_conformance.compile.pass.cpp
+++ b/libcxx/test/std/containers/associative/multiset/range_concept_conformance.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // multiset
 
diff --git a/libcxx/test/std/containers/associative/set/range_concept_conformance.compile.pass.cpp b/libcxx/test/std/containers/associative/set/range_concept_conformance.compile.pass.cpp
index caf6ba2..f7c0772 100644
--- a/libcxx/test/std/containers/associative/set/range_concept_conformance.compile.pass.cpp
+++ b/libcxx/test/std/containers/associative/set/range_concept_conformance.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // set
 
diff --git a/libcxx/test/std/containers/sequences/array/range_concept_conformance.compile.pass.cpp b/libcxx/test/std/containers/sequences/array/range_concept_conformance.compile.pass.cpp
index cfe01e7..dd4000c8 100644
--- a/libcxx/test/std/containers/sequences/array/range_concept_conformance.compile.pass.cpp
+++ b/libcxx/test/std/containers/sequences/array/range_concept_conformance.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // array
 
diff --git a/libcxx/test/std/containers/sequences/deque/range_concept_conformance.compile.pass.cpp b/libcxx/test/std/containers/sequences/deque/range_concept_conformance.compile.pass.cpp
index df9f6e8..866ac4c 100644
--- a/libcxx/test/std/containers/sequences/deque/range_concept_conformance.compile.pass.cpp
+++ b/libcxx/test/std/containers/sequences/deque/range_concept_conformance.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // deque
 
diff --git a/libcxx/test/std/containers/sequences/forwardlist/range_concept_conformance.compile.pass.cpp b/libcxx/test/std/containers/sequences/forwardlist/range_concept_conformance.compile.pass.cpp
index 142dc96..4afbb28 100644
--- a/libcxx/test/std/containers/sequences/forwardlist/range_concept_conformance.compile.pass.cpp
+++ b/libcxx/test/std/containers/sequences/forwardlist/range_concept_conformance.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // forward_list
 
diff --git a/libcxx/test/std/containers/sequences/list/range_concept_conformance.compile.pass.cpp b/libcxx/test/std/containers/sequences/list/range_concept_conformance.compile.pass.cpp
index 75c6d34..4183f6a 100644
--- a/libcxx/test/std/containers/sequences/list/range_concept_conformance.compile.pass.cpp
+++ b/libcxx/test/std/containers/sequences/list/range_concept_conformance.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // list
 
diff --git a/libcxx/test/std/containers/sequences/vector.bool/range_concept_conformance.compile.pass.cpp b/libcxx/test/std/containers/sequences/vector.bool/range_concept_conformance.compile.pass.cpp
index fb028d0..b9b3a27 100644
--- a/libcxx/test/std/containers/sequences/vector.bool/range_concept_conformance.compile.pass.cpp
+++ b/libcxx/test/std/containers/sequences/vector.bool/range_concept_conformance.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // vector
 
diff --git a/libcxx/test/std/containers/sequences/vector/range_concept_conformance.compile.pass.cpp b/libcxx/test/std/containers/sequences/vector/range_concept_conformance.compile.pass.cpp
index c47413e..37b751f 100644
--- a/libcxx/test/std/containers/sequences/vector/range_concept_conformance.compile.pass.cpp
+++ b/libcxx/test/std/containers/sequences/vector/range_concept_conformance.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // vector
 
diff --git a/libcxx/test/std/containers/unord/unord.map/range_concept_conformance.compile.pass.cpp b/libcxx/test/std/containers/unord/unord.map/range_concept_conformance.compile.pass.cpp
index 71a7221..60fea7f 100644
--- a/libcxx/test/std/containers/unord/unord.map/range_concept_conformance.compile.pass.cpp
+++ b/libcxx/test/std/containers/unord/unord.map/range_concept_conformance.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // unordered_map
 
diff --git a/libcxx/test/std/containers/unord/unord.multimap/range_concept_conformance.compile.pass.cpp b/libcxx/test/std/containers/unord/unord.multimap/range_concept_conformance.compile.pass.cpp
index e186272..695ee32 100644
--- a/libcxx/test/std/containers/unord/unord.multimap/range_concept_conformance.compile.pass.cpp
+++ b/libcxx/test/std/containers/unord/unord.multimap/range_concept_conformance.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // unordered_multimap
 
diff --git a/libcxx/test/std/containers/unord/unord.multiset/range_concept_conformance.compile.pass.cpp b/libcxx/test/std/containers/unord/unord.multiset/range_concept_conformance.compile.pass.cpp
index 29789d0..560dbae 100644
--- a/libcxx/test/std/containers/unord/unord.multiset/range_concept_conformance.compile.pass.cpp
+++ b/libcxx/test/std/containers/unord/unord.multiset/range_concept_conformance.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // unordered_multiset
 
diff --git a/libcxx/test/std/containers/unord/unord.set/range_concept_conformance.compile.pass.cpp b/libcxx/test/std/containers/unord/unord.set/range_concept_conformance.compile.pass.cpp
index bd48bba..8d41a55 100644
--- a/libcxx/test/std/containers/unord/unord.set/range_concept_conformance.compile.pass.cpp
+++ b/libcxx/test/std/containers/unord/unord.set/range_concept_conformance.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // unordered_multiset
 
diff --git a/libcxx/test/std/containers/views/range_concept_conformance.compile.pass.cpp b/libcxx/test/std/containers/views/range_concept_conformance.compile.pass.cpp
index c850c50..f4106e7 100644
--- a/libcxx/test/std/containers/views/range_concept_conformance.compile.pass.cpp
+++ b/libcxx/test/std/containers/views/range_concept_conformance.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // span
 
diff --git a/libcxx/test/std/input.output/filesystems/class.directory_iterator/range_concept_conformance.compile.pass.cpp b/libcxx/test/std/input.output/filesystems/class.directory_iterator/range_concept_conformance.compile.pass.cpp
index ff79c8b..27e5057 100644
--- a/libcxx/test/std/input.output/filesystems/class.directory_iterator/range_concept_conformance.compile.pass.cpp
+++ b/libcxx/test/std/input.output/filesystems/class.directory_iterator/range_concept_conformance.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 // XFAIL: *
 
 // directory_iterator, recursive_directory_iterator
diff --git a/libcxx/test/std/input.output/filesystems/class.path/range_concept_conformance.compile.pass.cpp b/libcxx/test/std/input.output/filesystems/class.path/range_concept_conformance.compile.pass.cpp
index b9b70d0..326073f 100644
--- a/libcxx/test/std/input.output/filesystems/class.path/range_concept_conformance.compile.pass.cpp
+++ b/libcxx/test/std/input.output/filesystems/class.path/range_concept_conformance.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // path
 
diff --git a/libcxx/test/std/iterators/predef.iterators/iterators.common/assign.pass.cpp b/libcxx/test/std/iterators/predef.iterators/iterators.common/assign.pass.cpp
index baa759f7..98bf6c0 100644
--- a/libcxx/test/std/iterators/predef.iterators/iterators.common/assign.pass.cpp
+++ b/libcxx/test/std/iterators/predef.iterators/iterators.common/assign.pass.cpp
@@ -16,7 +16,9 @@
 //     common_iterator& operator=(const common_iterator<I2, S2>& x);
 
 #include <iterator>
+#ifndef _LIBCPP_HAS_NO_INCOMPLETE_RANGES
 #include <ranges>
+#endif
 #include <cassert>
 
 #include "test_macros.h"
@@ -55,6 +57,7 @@ void test() {
     assert(*commonIter2 == 2);
     assert(commonIter1 == commonIter2);
   }
+#ifndef _LIBCPP_HAS_NO_INCOMPLETE_RANGES
   {
     auto iter1 = random_access_iterator<int*>(buffer);
     auto commonIter1 = std::common_iterator<decltype(iter1), sentinel_type<int*>>(iter1);
@@ -81,6 +84,7 @@ void test() {
     assert(std::ranges::next(commonIter1, 6) == commonSent1);
     assert(std::ranges::next(commonIter1, 6) == commonSent2);
   }
+#endif
   {
     auto iter1 = assignable_iterator<int*>(buffer);
     auto iter2 = forward_iterator<int*>(buffer + 1);
@@ -99,13 +103,17 @@ void test() {
     assert(*commonIter2 == 2);
     assert(commonIter1 == commonIter2);
 
+#ifndef _LIBCPP_HAS_NO_INCOMPLETE_RANGES
     assert(std::ranges::next(commonIter1, 6) != commonSent1);
     assert(std::ranges::next(commonIter1, 6) == commonSent2);
+#endif
 
     commonSent1 = commonSent2;
 
+#ifndef _LIBCPP_HAS_NO_INCOMPLETE_RANGES
     assert(std::ranges::next(commonIter1, 6) == commonSent1);
     assert(std::ranges::next(commonIter1, 6) == commonSent2);
+#endif
 
     commonIter1 = commonSent1;
 
diff --git a/libcxx/test/std/language.support/support.limits/support.limits.general/format.version.pass.cpp b/libcxx/test/std/language.support/support.limits/support.limits.general/format.version.pass.cpp
index 21707a5..67fc1af 100644
--- a/libcxx/test/std/language.support/support.limits/support.limits.general/format.version.pass.cpp
+++ b/libcxx/test/std/language.support/support.limits/support.limits.general/format.version.pass.cpp
@@ -11,6 +11,8 @@
 //
 // clang-format off
 
+// UNSUPPORTED: libcpp-has-no-incomplete-format
+
 // <format>
 
 // Test the feature test macros defined by <format>
diff --git a/libcxx/test/std/language.support/support.limits/support.limits.general/ranges.version.pass.cpp b/libcxx/test/std/language.support/support.limits/support.limits.general/ranges.version.pass.cpp
index 96496ad..b1da06f 100644
--- a/libcxx/test/std/language.support/support.limits/support.limits.general/ranges.version.pass.cpp
+++ b/libcxx/test/std/language.support/support.limits/support.limits.general/ranges.version.pass.cpp
@@ -11,6 +11,8 @@
 //
 // clang-format off
 
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
+
 // <ranges>
 
 // Test the feature test macros defined by <ranges>
diff --git a/libcxx/test/std/ranges/range.access/range.access.begin/begin.pass.cpp b/libcxx/test/std/ranges/range.access/range.access.begin/begin.pass.cpp
index 1e83cda..48c035e 100644
--- a/libcxx/test/std/ranges/range.access/range.access.begin/begin.pass.cpp
+++ b/libcxx/test/std/ranges/range.access/range.access.begin/begin.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // std::ranges::begin
 
diff --git a/libcxx/test/std/ranges/range.access/range.access.begin/incomplete.compile.verify.cpp b/libcxx/test/std/ranges/range.access/range.access.begin/incomplete.compile.verify.cpp
index b145930..a40b901 100644
--- a/libcxx/test/std/ranges/range.access/range.access.begin/incomplete.compile.verify.cpp
+++ b/libcxx/test/std/ranges/range.access/range.access.begin/incomplete.compile.verify.cpp
@@ -10,6 +10,7 @@
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
 // UNSUPPORTED: clang-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // unspecified begin;
 
diff --git a/libcxx/test/std/ranges/range.access/range.access.cbegin/incomplete.compile.verify.cpp b/libcxx/test/std/ranges/range.access/range.access.cbegin/incomplete.compile.verify.cpp
index 1fecf67..689d3d1 100644
--- a/libcxx/test/std/ranges/range.access/range.access.cbegin/incomplete.compile.verify.cpp
+++ b/libcxx/test/std/ranges/range.access/range.access.cbegin/incomplete.compile.verify.cpp
@@ -10,6 +10,7 @@
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
 // UNSUPPORTED: clang-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // ranges::cbegin;
 
diff --git a/libcxx/test/std/ranges/range.access/range.access.cend/incomplete.compile.verify.cpp b/libcxx/test/std/ranges/range.access/range.access.cend/incomplete.compile.verify.cpp
index 10b4517..5f18cb8 100644
--- a/libcxx/test/std/ranges/range.access/range.access.cend/incomplete.compile.verify.cpp
+++ b/libcxx/test/std/ranges/range.access/range.access.cend/incomplete.compile.verify.cpp
@@ -10,6 +10,7 @@
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
 // UNSUPPORTED: clang-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // unspecified begin;
 
diff --git a/libcxx/test/std/ranges/range.access/range.access.end/end.pass.cpp b/libcxx/test/std/ranges/range.access/range.access.end/end.pass.cpp
index 1a5d7fb..d571463 100644
--- a/libcxx/test/std/ranges/range.access/range.access.end/end.pass.cpp
+++ b/libcxx/test/std/ranges/range.access/range.access.end/end.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // std::ranges::end
 
diff --git a/libcxx/test/std/ranges/range.access/range.access.end/incomplete.compile.verify.cpp b/libcxx/test/std/ranges/range.access/range.access.end/incomplete.compile.verify.cpp
index 93c4c66..8b6c3e8 100644
--- a/libcxx/test/std/ranges/range.access/range.access.end/incomplete.compile.verify.cpp
+++ b/libcxx/test/std/ranges/range.access/range.access.end/incomplete.compile.verify.cpp
@@ -10,6 +10,7 @@
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
 // UNSUPPORTED: clang-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // unspecified begin;
 
diff --git a/libcxx/test/std/ranges/range.access/range.prim/data.incomplete.verify.cpp b/libcxx/test/std/ranges/range.access/range.prim/data.incomplete.verify.cpp
index f564750..a8d979c 100644
--- a/libcxx/test/std/ranges/range.access/range.prim/data.incomplete.verify.cpp
+++ b/libcxx/test/std/ranges/range.access/range.prim/data.incomplete.verify.cpp
@@ -10,6 +10,7 @@
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: clang-10
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // std::ranges::data
 
diff --git a/libcxx/test/std/ranges/range.access/range.prim/data.pass.cpp b/libcxx/test/std/ranges/range.access/range.prim/data.pass.cpp
index 567412a..9e28c21 100644
--- a/libcxx/test/std/ranges/range.access/range.prim/data.pass.cpp
+++ b/libcxx/test/std/ranges/range.access/range.prim/data.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // std::ranges::data
 
diff --git a/libcxx/test/std/ranges/range.access/range.prim/empty.incomplete.verify.cpp b/libcxx/test/std/ranges/range.access/range.prim/empty.incomplete.verify.cpp
index 0fcbad8..a2c354d 100644
--- a/libcxx/test/std/ranges/range.access/range.prim/empty.incomplete.verify.cpp
+++ b/libcxx/test/std/ranges/range.access/range.prim/empty.incomplete.verify.cpp
@@ -10,6 +10,7 @@
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: clang-10
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // std::ranges::empty
 
diff --git a/libcxx/test/std/ranges/range.access/range.prim/empty.pass.cpp b/libcxx/test/std/ranges/range.access/range.prim/empty.pass.cpp
index fc95c9c9..2607689 100644
--- a/libcxx/test/std/ranges/range.access/range.prim/empty.pass.cpp
+++ b/libcxx/test/std/ranges/range.access/range.prim/empty.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // std::ranges::empty
 
diff --git a/libcxx/test/std/ranges/range.access/range.prim/size.pass.cpp b/libcxx/test/std/ranges/range.access/range.prim/size.pass.cpp
index 301a67c..05f79b2 100644
--- a/libcxx/test/std/ranges/range.access/range.prim/size.pass.cpp
+++ b/libcxx/test/std/ranges/range.access/range.prim/size.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // std::ranges::size
 
diff --git a/libcxx/test/std/ranges/range.access/range.prim/ssize.pass.cpp b/libcxx/test/std/ranges/range.access/range.prim/ssize.pass.cpp
index 8b8878a..a995d56 100644
--- a/libcxx/test/std/ranges/range.access/range.prim/ssize.pass.cpp
+++ b/libcxx/test/std/ranges/range.access/range.prim/ssize.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // std::ranges::ssize
 
diff --git a/libcxx/test/std/ranges/range.adaptors/range.all/all.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.all/all.pass.cpp
index c4adfb3..806dbdb 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.all/all.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.all/all.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // std::views::all;
 
diff --git a/libcxx/test/std/ranges/range.adaptors/range.all/all_t.compile.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.all/all_t.compile.pass.cpp
index 5aaf03c..06dca18 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.all/all_t.compile.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.all/all_t.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // template<viewable_range R>
 // using all_t = decltype(views::all(declval<R>()));
diff --git a/libcxx/test/std/ranges/range.adaptors/range.common.view/base.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.common.view/base.pass.cpp
index 0f3df9e..72e23e4 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.common.view/base.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.common.view/base.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // constexpr V base() const& requires copy_constructible<V>;
 // constexpr V base() &&;
diff --git a/libcxx/test/std/ranges/range.adaptors/range.common.view/begin.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.common.view/begin.pass.cpp
index 9edd8eb..bdcde06 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.common.view/begin.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.common.view/begin.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // constexpr auto begin();
 // constexpr auto begin() const requires range<const V>;
diff --git a/libcxx/test/std/ranges/range.adaptors/range.common.view/borrowing.compile.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.common.view/borrowing.compile.pass.cpp
index 47441e3..66b431d 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.common.view/borrowing.compile.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.common.view/borrowing.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // template<class T>
 //   inline constexpr bool enable_borrowed_range<common_view<T>> = enable_borrowed_range<T>;
diff --git a/libcxx/test/std/ranges/range.adaptors/range.common.view/ctad.compile.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.common.view/ctad.compile.pass.cpp
index cde41fd..856212a 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.common.view/ctad.compile.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.common.view/ctad.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // template<class R>
 //   common_view(R&&) -> common_view<views::all_t<R>>;
diff --git a/libcxx/test/std/ranges/range.adaptors/range.common.view/ctor.default.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.common.view/ctor.default.pass.cpp
index 2b76a271f..72638a8 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.common.view/ctor.default.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.common.view/ctor.default.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // common_view() requires default_initializable<V> = default;
 
diff --git a/libcxx/test/std/ranges/range.adaptors/range.common.view/ctor.view.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.common.view/ctor.view.pass.cpp
index e7dab19..4fa9dea 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.common.view/ctor.view.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.common.view/ctor.view.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // constexpr explicit common_view(V r);
 
diff --git a/libcxx/test/std/ranges/range.adaptors/range.common.view/end.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.common.view/end.pass.cpp
index 9583373..0f103ca 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.common.view/end.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.common.view/end.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // constexpr auto end();
 // constexpr auto end() const requires range<const V>;
diff --git a/libcxx/test/std/ranges/range.adaptors/range.common.view/size.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.common.view/size.pass.cpp
index 464b9ea..efbaf52 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.common.view/size.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.common.view/size.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // constexpr auto size() requires sized_range<V>
 // constexpr auto size() const requires sized_range<const V>
diff --git a/libcxx/test/std/ranges/range.adaptors/range.drop/base.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.drop/base.pass.cpp
index f485d17..0173c40 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.drop/base.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.drop/base.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // constexpr V base() const& requires copy_constructible<V> { return base_; }
 // constexpr V base() && { return std::move(base_); }
diff --git a/libcxx/test/std/ranges/range.adaptors/range.drop/begin.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.drop/begin.pass.cpp
index b19143e..ce3ae0e 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.drop/begin.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.drop/begin.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // constexpr auto begin()
 //   requires (!(simple-view<V> &&
diff --git a/libcxx/test/std/ranges/range.adaptors/range.drop/ctad.compile.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.drop/ctad.compile.pass.cpp
index c22417b..03fa74c 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.drop/ctad.compile.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.drop/ctad.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // template<class R>
 // drop_view(R&&, range_difference_t<R>) -> drop_view<views::all_t<R>>;
diff --git a/libcxx/test/std/ranges/range.adaptors/range.drop/ctor.default.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.drop/ctor.default.pass.cpp
index 1e41825..11593ec 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.drop/ctor.default.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.drop/ctor.default.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // drop_view() requires default_initializable<V> = default;
 
diff --git a/libcxx/test/std/ranges/range.adaptors/range.drop/ctor.view.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.drop/ctor.view.pass.cpp
index 05cd1b1..f866090 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.drop/ctor.view.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.drop/ctor.view.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // constexpr drop_view(V base, range_difference_t<V> count);
 
diff --git a/libcxx/test/std/ranges/range.adaptors/range.drop/dangling.cache.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.drop/dangling.cache.pass.cpp
index 99e7d61..bde74ad 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.drop/dangling.cache.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.drop/dangling.cache.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // If we have a copy-propagating cache, when we copy ZeroOnDestroy, we will get a
 // dangling reference to the copied-from object. This test ensures that we do not
diff --git a/libcxx/test/std/ranges/range.adaptors/range.drop/end.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.drop/end.pass.cpp
index b0e5c54..28acbb6 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.drop/end.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.drop/end.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // constexpr auto end()
 //   requires (!simple-view<V>)
diff --git a/libcxx/test/std/ranges/range.adaptors/range.drop/general.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.drop/general.pass.cpp
index 087e11e..b0db1c5 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.drop/general.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.drop/general.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // Some basic examples of how drop_view might be used in the wild. This is a general
 // collection of sample algorithms and functions that try to mock general usage of
diff --git a/libcxx/test/std/ranges/range.adaptors/range.drop/size.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.drop/size.pass.cpp
index 297768a..48c6d4c 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.drop/size.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.drop/size.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // constexpr auto size()
 //   requires sized_range<V>
diff --git a/libcxx/test/std/ranges/range.adaptors/range.empty/empty_view.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.empty/empty_view.pass.cpp
index 6ee337f..5c43d04 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.empty/empty_view.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.empty/empty_view.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // template<class T>
 // class empty_view;
diff --git a/libcxx/test/std/ranges/range.adaptors/range.ref.view.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.ref.view.pass.cpp
index 9278bd0..4ceb996 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.ref.view.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.ref.view.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // template<range R>
 //  requires is_object_v<R>
diff --git a/libcxx/test/std/ranges/range.adaptors/range.transform/base.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.transform/base.pass.cpp
index 76ebc97..b3426c2 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.transform/base.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.transform/base.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // constexpr V base() const& requires copy_constructible<V>
 // constexpr V base() &&
diff --git a/libcxx/test/std/ranges/range.adaptors/range.transform/begin.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.transform/begin.pass.cpp
index 4c37dac..837bdce 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.transform/begin.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.transform/begin.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // constexpr iterator<false> begin();
 // constexpr iterator<true> begin() const
diff --git a/libcxx/test/std/ranges/range.adaptors/range.transform/ctad.compile.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.transform/ctad.compile.pass.cpp
index 0d123a8..d19eeb5 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.transform/ctad.compile.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.transform/ctad.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // CTAD tests.
 
diff --git a/libcxx/test/std/ranges/range.adaptors/range.transform/end.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.transform/end.pass.cpp
index e009b01..b216a02 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.transform/end.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.transform/end.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // constexpr sentinel<false> end();
 // constexpr iterator<false> end() requires common_range<V>;
diff --git a/libcxx/test/std/ranges/range.adaptors/range.transform/general.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.transform/general.pass.cpp
index 9c8403c..8daf15e 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.transform/general.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.transform/general.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // Some basic examples of how transform_view might be used in the wild. This is a general
 // collection of sample algorithms and functions that try to mock general usage of
diff --git a/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/arithmetic.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/arithmetic.pass.cpp
index eee9529..4ac17aa 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/arithmetic.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/arithmetic.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // transform_view::<iterator>::operator{++,--,+=,-=}
 
diff --git a/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/base.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/base.pass.cpp
index a9a705f..b644816 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/base.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/base.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // transform_view::<iterator>::base
 
diff --git a/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/compare.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/compare.pass.cpp
index eaa7ee5..71e75b6 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/compare.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/compare.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // transform_view::<iterator>::operator{<,>,<=,>=}
 
diff --git a/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/ctor.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/ctor.pass.cpp
index 47db757..e16d7cf 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/ctor.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/ctor.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // transform_view::<iterator>::transform_view::<iterator>();
 
diff --git a/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/deref.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/deref.pass.cpp
index 345e6d0..f1d0396 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/deref.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/deref.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // transform_view::<iterator>::operator*
 
diff --git a/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/iter_move.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/iter_move.pass.cpp
index c417dc8..cb3893d 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/iter_move.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/iter_move.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // transform_view::<iterator>::operator[]
 
diff --git a/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/plus_minus.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/plus_minus.pass.cpp
index 5def935..878aadf 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/plus_minus.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/plus_minus.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // transform_view::<iterator>::operator{+,-}
 
diff --git a/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/requirements.compile.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/requirements.compile.pass.cpp
index e29a316..bb5fb97 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/requirements.compile.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/requirements.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // The requirements for transform_view::<iterator>'s members.
 
diff --git a/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/sentinel.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/sentinel.pass.cpp
index fe072dd..f8ff9ec 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/sentinel.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/sentinel.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // class transform_view::<sentinel>;
 
diff --git a/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/subscript.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/subscript.pass.cpp
index 01b77c1..bcabb71 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/subscript.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/subscript.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // transform_view::<iterator>::operator[]
 
diff --git a/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/types.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/types.pass.cpp
index 7556366..1de567f 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/types.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.transform/iterator/types.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // transform_view::<iterator>::difference_type
 // transform_view::<iterator>::value_type
diff --git a/libcxx/test/std/ranges/range.adaptors/range.transform/size.pass.cpp b/libcxx/test/std/ranges/range.adaptors/range.transform/size.pass.cpp
index 6960d9b..95d9093 100644
--- a/libcxx/test/std/ranges/range.adaptors/range.transform/size.pass.cpp
+++ b/libcxx/test/std/ranges/range.adaptors/range.transform/size.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // constexpr auto size() requires sized_range<V>
 // constexpr auto size() const requires sized_range<const V>
diff --git a/libcxx/test/std/ranges/range.range/borrowed_range.compile.pass.cpp b/libcxx/test/std/ranges/range.range/borrowed_range.compile.pass.cpp
index d645efe..9311283 100644
--- a/libcxx/test/std/ranges/range.range/borrowed_range.compile.pass.cpp
+++ b/libcxx/test/std/ranges/range.range/borrowed_range.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // template<class T>
 // concept borrowed_range;
diff --git a/libcxx/test/std/ranges/range.range/borrowed_range.subsumption.compile.pass.cpp b/libcxx/test/std/ranges/range.range/borrowed_range.subsumption.compile.pass.cpp
index 163cef4..2df6d7e 100644
--- a/libcxx/test/std/ranges/range.range/borrowed_range.subsumption.compile.pass.cpp
+++ b/libcxx/test/std/ranges/range.range/borrowed_range.subsumption.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // template<class T>
 // concept borrowed_range;
diff --git a/libcxx/test/std/ranges/range.req/range.range/enable_borrowed_range.compile.pass.cpp b/libcxx/test/std/ranges/range.req/range.range/enable_borrowed_range.compile.pass.cpp
index 46755e3..b226743 100644
--- a/libcxx/test/std/ranges/range.req/range.range/enable_borrowed_range.compile.pass.cpp
+++ b/libcxx/test/std/ranges/range.req/range.range/enable_borrowed_range.compile.pass.cpp
@@ -8,6 +8,7 @@
 
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // <ranges>
 
diff --git a/libcxx/test/std/ranges/range.req/range.range/helper_aliases.compile.pass.cpp b/libcxx/test/std/ranges/range.req/range.range/helper_aliases.compile.pass.cpp
index 4fd128a..7771431 100644
--- a/libcxx/test/std/ranges/range.req/range.range/helper_aliases.compile.pass.cpp
+++ b/libcxx/test/std/ranges/range.req/range.range/helper_aliases.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // template<range R>
 // using range_difference_t = iter_difference_t<iterator_t<R>>;
diff --git a/libcxx/test/std/ranges/range.req/range.range/iterator_t.compile.pass.cpp b/libcxx/test/std/ranges/range.req/range.range/iterator_t.compile.pass.cpp
index 60a307b..ad598c1 100644
--- a/libcxx/test/std/ranges/range.req/range.range/iterator_t.compile.pass.cpp
+++ b/libcxx/test/std/ranges/range.req/range.range/iterator_t.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // template<class T>
 // using iterator_t = decltype(ranges::begin(declval<T&>()));
diff --git a/libcxx/test/std/ranges/range.req/range.range/range.compile.pass.cpp b/libcxx/test/std/ranges/range.req/range.range/range.compile.pass.cpp
index 82b35da..59b297f 100644
--- a/libcxx/test/std/ranges/range.req/range.range/range.compile.pass.cpp
+++ b/libcxx/test/std/ranges/range.req/range.range/range.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // template<class T>
 // concept range;
diff --git a/libcxx/test/std/ranges/range.req/range.range/range_size_t.compile.pass.cpp b/libcxx/test/std/ranges/range.req/range.range/range_size_t.compile.pass.cpp
index 5460f43..9e88690 100644
--- a/libcxx/test/std/ranges/range.req/range.range/range_size_t.compile.pass.cpp
+++ b/libcxx/test/std/ranges/range.req/range.range/range_size_t.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // template<sized_range R>
 // using range_size_t = decltype(ranges::size(declval<R&>()));
diff --git a/libcxx/test/std/ranges/range.req/range.range/sentinel_t.compile.pass.cpp b/libcxx/test/std/ranges/range.req/range.range/sentinel_t.compile.pass.cpp
index 84b9f44..6cbdd0f 100644
--- a/libcxx/test/std/ranges/range.req/range.range/sentinel_t.compile.pass.cpp
+++ b/libcxx/test/std/ranges/range.req/range.range/sentinel_t.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // template<range _Rp>
 // using sentinel_t = decltype(ranges::end(declval<_Rp&>()));
diff --git a/libcxx/test/std/ranges/range.req/range.refinements/bidirectional_range.compile.pass.cpp b/libcxx/test/std/ranges/range.req/range.refinements/bidirectional_range.compile.pass.cpp
index 6c6bb50..107d5de 100644
--- a/libcxx/test/std/ranges/range.req/range.refinements/bidirectional_range.compile.pass.cpp
+++ b/libcxx/test/std/ranges/range.req/range.refinements/bidirectional_range.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // template<class R>
 // concept bidirectional_range;
diff --git a/libcxx/test/std/ranges/range.req/range.refinements/common_range.compile.pass.cpp b/libcxx/test/std/ranges/range.req/range.refinements/common_range.compile.pass.cpp
index 59ce71e2..693ee81 100644
--- a/libcxx/test/std/ranges/range.req/range.refinements/common_range.compile.pass.cpp
+++ b/libcxx/test/std/ranges/range.req/range.refinements/common_range.compile.pass.cpp
@@ -8,6 +8,7 @@
 
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // template<class R>
 // concept common_range;
diff --git a/libcxx/test/std/ranges/range.req/range.refinements/contiguous_range.compile.pass.cpp b/libcxx/test/std/ranges/range.req/range.refinements/contiguous_range.compile.pass.cpp
index d4f0247..611d625 100644
--- a/libcxx/test/std/ranges/range.req/range.refinements/contiguous_range.compile.pass.cpp
+++ b/libcxx/test/std/ranges/range.req/range.refinements/contiguous_range.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // template<class R>
 // concept contiguous_range;
diff --git a/libcxx/test/std/ranges/range.req/range.refinements/forward_range.compile.pass.cpp b/libcxx/test/std/ranges/range.req/range.refinements/forward_range.compile.pass.cpp
index d19531c..c30a64d 100644
--- a/libcxx/test/std/ranges/range.req/range.refinements/forward_range.compile.pass.cpp
+++ b/libcxx/test/std/ranges/range.req/range.refinements/forward_range.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // template<class R>
 // concept forward_range;
diff --git a/libcxx/test/std/ranges/range.req/range.refinements/input_range.compile.pass.cpp b/libcxx/test/std/ranges/range.req/range.refinements/input_range.compile.pass.cpp
index dc9b9bc..0aadc42 100644
--- a/libcxx/test/std/ranges/range.req/range.refinements/input_range.compile.pass.cpp
+++ b/libcxx/test/std/ranges/range.req/range.refinements/input_range.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // template<class R>
 // concept input_range;
diff --git a/libcxx/test/std/ranges/range.req/range.refinements/output_range.compile.pass.cpp b/libcxx/test/std/ranges/range.req/range.refinements/output_range.compile.pass.cpp
index d3c5808..c9818db 100644
--- a/libcxx/test/std/ranges/range.req/range.refinements/output_range.compile.pass.cpp
+++ b/libcxx/test/std/ranges/range.req/range.refinements/output_range.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // template<class R, class T>
 // concept output_range;
diff --git a/libcxx/test/std/ranges/range.req/range.refinements/random_access_range.compile.pass.cpp b/libcxx/test/std/ranges/range.req/range.refinements/random_access_range.compile.pass.cpp
index f73c750..1a2baac 100644
--- a/libcxx/test/std/ranges/range.req/range.refinements/random_access_range.compile.pass.cpp
+++ b/libcxx/test/std/ranges/range.req/range.refinements/random_access_range.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // template<class R>
 // concept random_access_range;
diff --git a/libcxx/test/std/ranges/range.req/range.refinements/subsumption.compile.pass.cpp b/libcxx/test/std/ranges/range.req/range.refinements/subsumption.compile.pass.cpp
index d2f3f39..c47e054 100644
--- a/libcxx/test/std/ranges/range.req/range.refinements/subsumption.compile.pass.cpp
+++ b/libcxx/test/std/ranges/range.req/range.refinements/subsumption.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // template<class T>
 // concept input_iterator;
diff --git a/libcxx/test/std/ranges/range.req/range.refinements/viewable_range.compile.pass.cpp b/libcxx/test/std/ranges/range.req/range.refinements/viewable_range.compile.pass.cpp
index 3cef347..4b7bf81 100644
--- a/libcxx/test/std/ranges/range.req/range.refinements/viewable_range.compile.pass.cpp
+++ b/libcxx/test/std/ranges/range.req/range.refinements/viewable_range.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // template<class R>
 // concept viewable_range;
diff --git a/libcxx/test/std/ranges/range.req/range.sized/sized_range.compile.pass.cpp b/libcxx/test/std/ranges/range.req/range.sized/sized_range.compile.pass.cpp
index ca03b8b..b5d30d6 100644
--- a/libcxx/test/std/ranges/range.req/range.sized/sized_range.compile.pass.cpp
+++ b/libcxx/test/std/ranges/range.req/range.sized/sized_range.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // template<class T>
 // concept sized_range;
diff --git a/libcxx/test/std/ranges/range.req/range.sized/subsumption.compile.pass.cpp b/libcxx/test/std/ranges/range.req/range.sized/subsumption.compile.pass.cpp
index 854429f..8d960c4 100644
--- a/libcxx/test/std/ranges/range.req/range.sized/subsumption.compile.pass.cpp
+++ b/libcxx/test/std/ranges/range.req/range.sized/subsumption.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // template<class T>
 // concept sized_range;
diff --git a/libcxx/test/std/ranges/range.req/range.view/enable_view.compile.pass.cpp b/libcxx/test/std/ranges/range.req/range.view/enable_view.compile.pass.cpp
index 2f7baab..19ea867 100644
--- a/libcxx/test/std/ranges/range.req/range.view/enable_view.compile.pass.cpp
+++ b/libcxx/test/std/ranges/range.req/range.view/enable_view.compile.pass.cpp
@@ -8,6 +8,7 @@
 
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // <ranges>
 
diff --git a/libcxx/test/std/ranges/range.req/range.view/view.compile.pass.cpp b/libcxx/test/std/ranges/range.req/range.view/view.compile.pass.cpp
index 5184bb0..2d0c253 100644
--- a/libcxx/test/std/ranges/range.req/range.view/view.compile.pass.cpp
+++ b/libcxx/test/std/ranges/range.req/range.view/view.compile.pass.cpp
@@ -8,6 +8,7 @@
 
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // <ranges>
 
diff --git a/libcxx/test/std/ranges/range.req/range.view/view.subsumption.compile.pass.cpp b/libcxx/test/std/ranges/range.req/range.view/view.subsumption.compile.pass.cpp
index c3df4de..63f150dc 100644
--- a/libcxx/test/std/ranges/range.req/range.view/view.subsumption.compile.pass.cpp
+++ b/libcxx/test/std/ranges/range.req/range.view/view.subsumption.compile.pass.cpp
@@ -8,6 +8,7 @@
 
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // <ranges>
 
diff --git a/libcxx/test/std/ranges/range.req/range.view/view_base.compile.pass.cpp b/libcxx/test/std/ranges/range.req/range.view/view_base.compile.pass.cpp
index 94a996d..b4fee83 100644
--- a/libcxx/test/std/ranges/range.req/range.view/view_base.compile.pass.cpp
+++ b/libcxx/test/std/ranges/range.req/range.view/view_base.compile.pass.cpp
@@ -8,6 +8,7 @@
 
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // <ranges>
 
diff --git a/libcxx/test/std/ranges/range.utility/range.dangling/borrowed_iterator.compile.pass.cpp b/libcxx/test/std/ranges/range.utility/range.dangling/borrowed_iterator.compile.pass.cpp
index bff34a7..54e6593 100644
--- a/libcxx/test/std/ranges/range.utility/range.dangling/borrowed_iterator.compile.pass.cpp
+++ b/libcxx/test/std/ranges/range.utility/range.dangling/borrowed_iterator.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // std::ranges::borrowed_iterator_t;
 
diff --git a/libcxx/test/std/ranges/range.utility/range.dangling/borrowed_subrange.compile.pass.cpp b/libcxx/test/std/ranges/range.utility/range.dangling/borrowed_subrange.compile.pass.cpp
index 7327145..13f25d6 100644
--- a/libcxx/test/std/ranges/range.utility/range.dangling/borrowed_subrange.compile.pass.cpp
+++ b/libcxx/test/std/ranges/range.utility/range.dangling/borrowed_subrange.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // std::ranges::borrowed_subrange_t;
 
diff --git a/libcxx/test/std/ranges/range.utility/range.dangling/dangling.pass.cpp b/libcxx/test/std/ranges/range.utility/range.dangling/dangling.pass.cpp
index b04d823..57626c3 100644
--- a/libcxx/test/std/ranges/range.utility/range.dangling/dangling.pass.cpp
+++ b/libcxx/test/std/ranges/range.utility/range.dangling/dangling.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // std::ranges::dangling;
 
diff --git a/libcxx/test/std/ranges/range.utility/range.subrange/access/advance.pass.cpp b/libcxx/test/std/ranges/range.utility/range.subrange/access/advance.pass.cpp
index 2d1cd7e..0154aaa 100644
--- a/libcxx/test/std/ranges/range.utility/range.subrange/access/advance.pass.cpp
+++ b/libcxx/test/std/ranges/range.utility/range.subrange/access/advance.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // class std::ranges::subrange;
 
diff --git a/libcxx/test/std/ranges/range.utility/range.subrange/access/get.pass.cpp b/libcxx/test/std/ranges/range.utility/range.subrange/access/get.pass.cpp
index 8c1a027..88f18df 100644
--- a/libcxx/test/std/ranges/range.utility/range.subrange/access/get.pass.cpp
+++ b/libcxx/test/std/ranges/range.utility/range.subrange/access/get.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // class std::ranges::subrange;
 
diff --git a/libcxx/test/std/ranges/range.utility/range.subrange/access/primitives.pass.cpp b/libcxx/test/std/ranges/range.utility/range.subrange/access/primitives.pass.cpp
index fe31471..cc2336f 100644
--- a/libcxx/test/std/ranges/range.utility/range.subrange/access/primitives.pass.cpp
+++ b/libcxx/test/std/ranges/range.utility/range.subrange/access/primitives.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // class std::ranges::subrange;
 
diff --git a/libcxx/test/std/ranges/range.utility/range.subrange/ctad.compile.pass.cpp b/libcxx/test/std/ranges/range.utility/range.subrange/ctad.compile.pass.cpp
index e34b519..2bd13f1 100644
--- a/libcxx/test/std/ranges/range.utility/range.subrange/ctad.compile.pass.cpp
+++ b/libcxx/test/std/ranges/range.utility/range.subrange/ctad.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // class std::ranges::subrange;
 
diff --git a/libcxx/test/std/ranges/range.utility/range.subrange/ctor/begin_end.pass.cpp b/libcxx/test/std/ranges/range.utility/range.subrange/ctor/begin_end.pass.cpp
index 5a6364f..4308e6a 100644
--- a/libcxx/test/std/ranges/range.utility/range.subrange/ctor/begin_end.pass.cpp
+++ b/libcxx/test/std/ranges/range.utility/range.subrange/ctor/begin_end.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // class std::ranges::subrange;
 
diff --git a/libcxx/test/std/ranges/range.utility/range.subrange/ctor/begin_end_size.pass.cpp b/libcxx/test/std/ranges/range.utility/range.subrange/ctor/begin_end_size.pass.cpp
index e8ae605..5a362ba 100644
--- a/libcxx/test/std/ranges/range.utility/range.subrange/ctor/begin_end_size.pass.cpp
+++ b/libcxx/test/std/ranges/range.utility/range.subrange/ctor/begin_end_size.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // class std::ranges::subrange;
 
diff --git a/libcxx/test/std/ranges/range.utility/range.subrange/ctor/pair_like_conv.pass.cpp b/libcxx/test/std/ranges/range.utility/range.subrange/ctor/pair_like_conv.pass.cpp
index 1b74983..d1b178d 100644
--- a/libcxx/test/std/ranges/range.utility/range.subrange/ctor/pair_like_conv.pass.cpp
+++ b/libcxx/test/std/ranges/range.utility/range.subrange/ctor/pair_like_conv.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // class std::ranges::subrange;
 
diff --git a/libcxx/test/std/ranges/range.utility/range.subrange/ctor/range.pass.cpp b/libcxx/test/std/ranges/range.utility/range.subrange/ctor/range.pass.cpp
index a6e0300..13746fe 100644
--- a/libcxx/test/std/ranges/range.utility/range.subrange/ctor/range.pass.cpp
+++ b/libcxx/test/std/ranges/range.utility/range.subrange/ctor/range.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // class std::ranges::subrange;
 
diff --git a/libcxx/test/std/ranges/range.utility/range.subrange/ctor/range_size.pass.cpp b/libcxx/test/std/ranges/range.utility/range.subrange/ctor/range_size.pass.cpp
index fe71fee..b3d5646 100644
--- a/libcxx/test/std/ranges/range.utility/range.subrange/ctor/range_size.pass.cpp
+++ b/libcxx/test/std/ranges/range.utility/range.subrange/ctor/range_size.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // class std::ranges::subrange;
 
diff --git a/libcxx/test/std/ranges/range.utility/range.subrange/enable_borrowed_range.compile.pass.cpp b/libcxx/test/std/ranges/range.utility/range.subrange/enable_borrowed_range.compile.pass.cpp
index 1c7f6e4..5bcd656 100644
--- a/libcxx/test/std/ranges/range.utility/range.subrange/enable_borrowed_range.compile.pass.cpp
+++ b/libcxx/test/std/ranges/range.utility/range.subrange/enable_borrowed_range.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // class std::ranges::subrange;
 
diff --git a/libcxx/test/std/ranges/range.utility/range.subrange/general.compile.pass.cpp b/libcxx/test/std/ranges/range.utility/range.subrange/general.compile.pass.cpp
index a7a944b..50419ef 100644
--- a/libcxx/test/std/ranges/range.utility/range.subrange/general.compile.pass.cpp
+++ b/libcxx/test/std/ranges/range.utility/range.subrange/general.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // class std::ranges::subrange;
 
diff --git a/libcxx/test/std/ranges/range.utility/view.interface/view.interface.pass.cpp b/libcxx/test/std/ranges/range.utility/view.interface/view.interface.pass.cpp
index 61cffe1..713c362 100644
--- a/libcxx/test/std/ranges/range.utility/view.interface/view.interface.pass.cpp
+++ b/libcxx/test/std/ranges/range.utility/view.interface/view.interface.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // template<class D>
 //   requires is_class_v<D> && same_as<D, remove_cv_t<D>>
diff --git a/libcxx/test/std/re/re.results/range_concept_conformance.compile.pass.cpp b/libcxx/test/std/re/re.results/range_concept_conformance.compile.pass.cpp
index 741b1ad..b2b0736 100644
--- a/libcxx/test/std/re/re.results/range_concept_conformance.compile.pass.cpp
+++ b/libcxx/test/std/re/re.results/range_concept_conformance.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // match_results
 
diff --git a/libcxx/test/std/strings/basic.string/range_concept_conformance.compile.pass.cpp b/libcxx/test/std/strings/basic.string/range_concept_conformance.compile.pass.cpp
index fb1e676..b195964 100644
--- a/libcxx/test/std/strings/basic.string/range_concept_conformance.compile.pass.cpp
+++ b/libcxx/test/std/strings/basic.string/range_concept_conformance.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // string
 
diff --git a/libcxx/test/std/strings/string.view/range_concept_conformance.compile.pass.cpp b/libcxx/test/std/strings/string.view/range_concept_conformance.compile.pass.cpp
index 860de80..e120001 100644
--- a/libcxx/test/std/strings/string.view/range_concept_conformance.compile.pass.cpp
+++ b/libcxx/test/std/strings/string.view/range_concept_conformance.compile.pass.cpp
@@ -9,6 +9,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: gcc-10
+// UNSUPPORTED: libcpp-has-no-incomplete-ranges
 
 // string_view
 
diff --git a/libcxx/test/std/utilities/format/format.error/format.error.pass.cpp b/libcxx/test/std/utilities/format/format.error/format.error.pass.cpp
index 979a3fe..e3d3c48 100644
--- a/libcxx/test/std/utilities/format/format.error/format.error.pass.cpp
+++ b/libcxx/test/std/utilities/format/format.error/format.error.pass.cpp
@@ -7,6 +7,7 @@
 //===----------------------------------------------------------------------===//
 
 // UNSUPPORTED: c++03, c++11, c++14, c++17
+// UNSUPPORTED: libcpp-has-no-incomplete-format
 
 // This test requires the dylib support introduced in D92214.
 // XFAIL: use_system_cxx_lib && target={{.+}}-apple-macosx10.{{9|10|11|12|13|14|15}}
diff --git a/libcxx/test/std/utilities/format/format.formatter/format.parse.ctx/advance_to.pass.cpp b/libcxx/test/std/utilities/format/format.formatter/format.parse.ctx/advance_to.pass.cpp
index a4e219f..fe0405f 100644
--- a/libcxx/test/std/utilities/format/format.formatter/format.parse.ctx/advance_to.pass.cpp
+++ b/libcxx/test/std/utilities/format/format.formatter/format.parse.ctx/advance_to.pass.cpp
@@ -7,6 +7,7 @@
 
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
+// UNSUPPORTED: libcpp-has-no-incomplete-format
 
 // <format>
 
diff --git a/libcxx/test/std/utilities/format/format.formatter/format.parse.ctx/begin.pass.cpp b/libcxx/test/std/utilities/format/format.formatter/format.parse.ctx/begin.pass.cpp
index bcc11c6..b15f1ef 100644
--- a/libcxx/test/std/utilities/format/format.formatter/format.parse.ctx/begin.pass.cpp
+++ b/libcxx/test/std/utilities/format/format.formatter/format.parse.ctx/begin.pass.cpp
@@ -7,6 +7,7 @@
 
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
+// UNSUPPORTED: libcpp-has-no-incomplete-format
 
 // <format>
 
diff --git a/libcxx/test/std/utilities/format/format.formatter/format.parse.ctx/check_arg_id.pass.cpp b/libcxx/test/std/utilities/format/format.formatter/format.parse.ctx/check_arg_id.pass.cpp
index 7af82c3..910059b 100644
--- a/libcxx/test/std/utilities/format/format.formatter/format.parse.ctx/check_arg_id.pass.cpp
+++ b/libcxx/test/std/utilities/format/format.formatter/format.parse.ctx/check_arg_id.pass.cpp
@@ -8,6 +8,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: no-exceptions
+// UNSUPPORTED: libcpp-has-no-incomplete-format
 
 // This test requires the dylib support introduced in D92214.
 // XFAIL: use_system_cxx_lib && target={{.+}}-apple-macosx10.{{9|10|11|12|13|14|15}}
diff --git a/libcxx/test/std/utilities/format/format.formatter/format.parse.ctx/ctor.pass.cpp b/libcxx/test/std/utilities/format/format.formatter/format.parse.ctx/ctor.pass.cpp
index 1644ff6..ac6e8ca 100644
--- a/libcxx/test/std/utilities/format/format.formatter/format.parse.ctx/ctor.pass.cpp
+++ b/libcxx/test/std/utilities/format/format.formatter/format.parse.ctx/ctor.pass.cpp
@@ -7,6 +7,7 @@
 
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
+// UNSUPPORTED: libcpp-has-no-incomplete-format
 
 // <format>
 
diff --git a/libcxx/test/std/utilities/format/format.formatter/format.parse.ctx/end.pass.cpp b/libcxx/test/std/utilities/format/format.formatter/format.parse.ctx/end.pass.cpp
index 4026079..70e9de1 100644
--- a/libcxx/test/std/utilities/format/format.formatter/format.parse.ctx/end.pass.cpp
+++ b/libcxx/test/std/utilities/format/format.formatter/format.parse.ctx/end.pass.cpp
@@ -7,6 +7,7 @@
 
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
+// UNSUPPORTED: libcpp-has-no-incomplete-format
 
 // <format>
 
diff --git a/libcxx/test/std/utilities/format/format.formatter/format.parse.ctx/next_arg_id.pass.cpp b/libcxx/test/std/utilities/format/format.formatter/format.parse.ctx/next_arg_id.pass.cpp
index c5f05d9..72f2b02 100644
--- a/libcxx/test/std/utilities/format/format.formatter/format.parse.ctx/next_arg_id.pass.cpp
+++ b/libcxx/test/std/utilities/format/format.formatter/format.parse.ctx/next_arg_id.pass.cpp
@@ -8,6 +8,7 @@
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
 // UNSUPPORTED: no-exceptions
+// UNSUPPORTED: libcpp-has-no-incomplete-format
 
 // This test requires the dylib support introduced in D92214.
 // XFAIL: use_system_cxx_lib && target={{.+}}-apple-macosx10.{{9|10|11|12|13|14|15}}
diff --git a/libcxx/test/std/utilities/format/format.formatter/format.parse.ctx/types.compile.pass.cpp b/libcxx/test/std/utilities/format/format.formatter/format.parse.ctx/types.compile.pass.cpp
index b632f75..7e1a6b6 100644
--- a/libcxx/test/std/utilities/format/format.formatter/format.parse.ctx/types.compile.pass.cpp
+++ b/libcxx/test/std/utilities/format/format.formatter/format.parse.ctx/types.compile.pass.cpp
@@ -7,6 +7,7 @@
 
 // UNSUPPORTED: c++03, c++11, c++14, c++17
 // UNSUPPORTED: libcpp-no-concepts
+// UNSUPPORTED: libcpp-has-no-incomplete-format
 
 // <format>
 
diff --git a/libcxx/utils/generate_feature_test_macro_components.py b/libcxx/utils/generate_feature_test_macro_components.py
index 78b124e..9fb740f 100755
--- a/libcxx/utils/generate_feature_test_macro_components.py
+++ b/libcxx/utils/generate_feature_test_macro_components.py
@@ -684,11 +684,13 @@ lit_markup = {
   "atomic": ["UNSUPPORTED: libcpp-has-no-threads"],
   "barrier": ["UNSUPPORTED: libcpp-has-no-threads"],
   "filesystem": ["UNSUPPORTED: libcpp-has-no-filesystem-library"],
+  "format": ["UNSUPPORTED: libcpp-has-no-incomplete-format"],
   "iomanip": ["UNSUPPORTED: libcpp-has-no-localization"],
   "istream": ["UNSUPPORTED: libcpp-has-no-localization"],
   "latch": ["UNSUPPORTED: libcpp-has-no-threads"],
   "locale": ["UNSUPPORTED: libcpp-has-no-localization"],
   "ostream": ["UNSUPPORTED: libcpp-has-no-localization"],
+  "ranges": ["UNSUPPORTED: libcpp-has-no-incomplete-ranges"],
   "regex": ["UNSUPPORTED: libcpp-has-no-localization"],
   "semaphore": ["UNSUPPORTED: libcpp-has-no-threads"],
   "shared_mutex": ["UNSUPPORTED: libcpp-has-no-threads"],
diff --git a/libcxx/utils/generate_header_inclusion_tests.py b/libcxx/utils/generate_header_inclusion_tests.py
index 89cd67d..7b5a2db 100755
--- a/libcxx/utils/generate_header_inclusion_tests.py
+++ b/libcxx/utils/generate_header_inclusion_tests.py
@@ -93,6 +93,7 @@ lit_markup = {
   "atomic": ["UNSUPPORTED: libcpp-has-no-threads"],
   "barrier": ["UNSUPPORTED: libcpp-has-no-threads"],
   "filesystem": ["UNSUPPORTED: libcpp-has-no-filesystem-library"],
+  "format": ["UNSUPPORTED: libcpp-has-no-incomplete-format"],
   "iomanip": ["UNSUPPORTED: libcpp-has-no-localization"],
   "ios": ["UNSUPPORTED: libcpp-has-no-localization"],
   "iostream": ["UNSUPPORTED: libcpp-has-no-localization"],
@@ -100,6 +101,7 @@ lit_markup = {
   "latch": ["UNSUPPORTED: libcpp-has-no-threads"],
   "locale": ["UNSUPPORTED: libcpp-has-no-localization"],
   "ostream": ["UNSUPPORTED: libcpp-has-no-localization"],
+  "ranges": ["UNSUPPORTED: libcpp-has-no-incomplete-ranges"],
   "regex": ["UNSUPPORTED: libcpp-has-no-localization"],
   "semaphore": ["UNSUPPORTED: libcpp-has-no-threads"],
   "shared_mutex": ["UNSUPPORTED: libcpp-has-no-threads"],
diff --git a/libcxx/utils/generate_header_tests.py b/libcxx/utils/generate_header_tests.py
index 5236350..e081914 100755
--- a/libcxx/utils/generate_header_tests.py
+++ b/libcxx/utils/generate_header_tests.py
@@ -32,6 +32,7 @@ header_markup = {
 
     "experimental/filesystem": ["ifndef _LIBCPP_HAS_NO_FILESYSTEM_LIBRARY"],
     "filesystem": ["ifndef _LIBCPP_HAS_NO_FILESYSTEM_LIBRARY"],
+    "format": ["ifndef _LIBCPP_HAS_NO_INCOMPLETE_FORMAT"],
 
     "clocale": ["ifndef _LIBCPP_HAS_NO_LOCALIZATION"],
     "codecvt": ["ifndef _LIBCPP_HAS_NO_LOCALIZATION"],
@@ -43,6 +44,7 @@ header_markup = {
     "locale.h": ["ifndef _LIBCPP_HAS_NO_LOCALIZATION"],
     "locale": ["ifndef _LIBCPP_HAS_NO_LOCALIZATION"],
     "ostream": ["ifndef _LIBCPP_HAS_NO_LOCALIZATION"],
+    "ranges": ["ifndef _LIBCPP_HAS_NO_INCOMPLETE_RANGES"],
     "regex": ["ifndef _LIBCPP_HAS_NO_LOCALIZATION"],
     "sstream": ["ifndef _LIBCPP_HAS_NO_LOCALIZATION"],
     "streambuf": ["ifndef _LIBCPP_HAS_NO_LOCALIZATION"],
diff --git a/libcxx/utils/libcxx/test/features.py b/libcxx/utils/libcxx/test/features.py
index d9b092c..09afe20 100644
--- a/libcxx/utils/libcxx/test/features.py
+++ b/libcxx/utils/libcxx/test/features.py
@@ -104,6 +104,8 @@ macros = {
   '_LIBCPP_HAS_NO_FILESYSTEM_LIBRARY': 'libcpp-has-no-filesystem-library',
   '_LIBCPP_HAS_NO_RANDOM_DEVICE': 'libcpp-has-no-random-device',
   '_LIBCPP_HAS_NO_LOCALIZATION': 'libcpp-has-no-localization',
+  '_LIBCPP_HAS_NO_INCOMPLETE_FORMAT': 'libcpp-has-no-incomplete-format',
+  '_LIBCPP_HAS_NO_INCOMPLETE_RANGES': 'libcpp-has-no-incomplete-ranges',
 }
 for macro, feature in macros.items():
   DEFAULT_FEATURES += [