[libc++] Add missing conditionals for feature-test macros (#80168)

We noticed that some feature-test macros were not conditional on
configuration flags like _LIBCPP_HAS_NO_FILESYSTEM. As a result, code
attempting to use FTMs would not work as intended.

This patch adds conditionals for a few feature-test macros, but more
issues may exist.

rdar://122020466

7 files changed, 254 insertions, 122 deletions

diff --git a/libcxx/include/version b/libcxx/include/version
index e4dbb7b..b18927a 100644
--- a/libcxx/include/version
+++ b/libcxx/include/version
@@ -266,7 +266,9 @@ __cpp_lib_within_lifetime                               202306L <type_traits>
 # define __cpp_lib_make_reverse_iterator                201402L
 # define __cpp_lib_make_unique                          201304L
 # define __cpp_lib_null_iterators                       201304L
-# define __cpp_lib_quoted_string_io                     201304L
+# if !defined(_LIBCPP_HAS_NO_LOCALIZATION)
+#   define __cpp_lib_quoted_string_io                   201304L
+# endif
 # define __cpp_lib_result_of_sfinae                     201210L
 # define __cpp_lib_robust_nonmodifying_seq_ops          201304L
 # if !defined(_LIBCPP_HAS_NO_THREADS)
@@ -294,7 +296,7 @@ __cpp_lib_within_lifetime                               202306L <type_traits>
 # define __cpp_lib_clamp                                201603L
 # define __cpp_lib_enable_shared_from_this              201603L
 // # define __cpp_lib_execution                            201603L
-# if _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY
+# if !defined(_LIBCPP_HAS_NO_FILESYSTEM) && _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY
 #   define __cpp_lib_filesystem                         201703L
 # endif
 # define __cpp_lib_gcd_lcm                              201606L
@@ -323,7 +325,9 @@ __cpp_lib_within_lifetime                               202306L <type_traits>
 // # define __cpp_lib_parallel_algorithm                   201603L
 # define __cpp_lib_raw_memory_algorithms                201606L
 # define __cpp_lib_sample                               201603L
-# define __cpp_lib_scoped_lock                          201703L
+# if !defined(_LIBCPP_HAS_NO_THREADS)
+#   define __cpp_lib_scoped_lock                        201703L
+# endif
 # if !defined(_LIBCPP_HAS_NO_THREADS)
 #   define __cpp_lib_shared_mutex                       201505L
 # endif
@@ -496,7 +500,9 @@ __cpp_lib_within_lifetime                               202306L <type_traits>
 // # define __cpp_lib_freestanding_optional                202311L
 // # define __cpp_lib_freestanding_string_view             202311L
 // # define __cpp_lib_freestanding_variant                 202311L
-# define __cpp_lib_fstream_native_handle                202306L
+# if !defined(_LIBCPP_HAS_NO_FILESYSTEM) && !defined(_LIBCPP_HAS_NO_LOCALIZATION)
+#   define __cpp_lib_fstream_native_handle              202306L
+# endif
 // # define __cpp_lib_function_ref                         202306L
 // # define __cpp_lib_hazard_pointer                       202306L
 // # define __cpp_lib_linalg                               202311L
diff --git a/libcxx/test/std/language.support/support.limits/support.limits.general/filesystem.version.compile.pass.cpp b/libcxx/test/std/language.support/support.limits/support.limits.general/filesystem.version.compile.pass.cpp
index 46ccde8..3f03e8b 100644
--- a/libcxx/test/std/language.support/support.limits/support.limits.general/filesystem.version.compile.pass.cpp
+++ b/libcxx/test/std/language.support/support.limits/support.limits.general/filesystem.version.compile.pass.cpp
@@ -51,7 +51,7 @@
 #   error "__cpp_lib_char8_t should not be defined before c++20"
 # endif
 
-# if !defined(_LIBCPP_VERSION) || _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY
+# if !defined(_LIBCPP_VERSION) || (!defined(_LIBCPP_HAS_NO_FILESYSTEM) && _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY)
 #   ifndef __cpp_lib_filesystem
 #     error "__cpp_lib_filesystem should be defined in c++17"
 #   endif
@@ -60,7 +60,7 @@
 #   endif
 # else
 #   ifdef __cpp_lib_filesystem
-#     error "__cpp_lib_filesystem should not be defined when the requirement '!defined(_LIBCPP_VERSION) || _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY' is not met!"
+#     error "__cpp_lib_filesystem should not be defined when the requirement '!defined(_LIBCPP_VERSION) || (!defined(_LIBCPP_HAS_NO_FILESYSTEM) && _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY)' is not met!"
 #   endif
 # endif
 
@@ -79,7 +79,7 @@
 #   endif
 # endif
 
-# if !defined(_LIBCPP_VERSION) || _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY
+# if !defined(_LIBCPP_VERSION) || (!defined(_LIBCPP_HAS_NO_FILESYSTEM) && _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY)
 #   ifndef __cpp_lib_filesystem
 #     error "__cpp_lib_filesystem should be defined in c++20"
 #   endif
@@ -88,7 +88,7 @@
 #   endif
 # else
 #   ifdef __cpp_lib_filesystem
-#     error "__cpp_lib_filesystem should not be defined when the requirement '!defined(_LIBCPP_VERSION) || _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY' is not met!"
+#     error "__cpp_lib_filesystem should not be defined when the requirement '!defined(_LIBCPP_VERSION) || (!defined(_LIBCPP_HAS_NO_FILESYSTEM) && _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY)' is not met!"
 #   endif
 # endif
 
@@ -107,7 +107,7 @@
 #   endif
 # endif
 
-# if !defined(_LIBCPP_VERSION) || _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY
+# if !defined(_LIBCPP_VERSION) || (!defined(_LIBCPP_HAS_NO_FILESYSTEM) && _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY)
 #   ifndef __cpp_lib_filesystem
 #     error "__cpp_lib_filesystem should be defined in c++23"
 #   endif
@@ -116,7 +116,7 @@
 #   endif
 # else
 #   ifdef __cpp_lib_filesystem
-#     error "__cpp_lib_filesystem should not be defined when the requirement '!defined(_LIBCPP_VERSION) || _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY' is not met!"
+#     error "__cpp_lib_filesystem should not be defined when the requirement '!defined(_LIBCPP_VERSION) || (!defined(_LIBCPP_HAS_NO_FILESYSTEM) && _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY)' is not met!"
 #   endif
 # endif
 
@@ -135,7 +135,7 @@
 #   endif
 # endif
 
-# if !defined(_LIBCPP_VERSION) || _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY
+# if !defined(_LIBCPP_VERSION) || (!defined(_LIBCPP_HAS_NO_FILESYSTEM) && _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY)
 #   ifndef __cpp_lib_filesystem
 #     error "__cpp_lib_filesystem should be defined in c++26"
 #   endif
@@ -144,7 +144,7 @@
 #   endif
 # else
 #   ifdef __cpp_lib_filesystem
-#     error "__cpp_lib_filesystem should not be defined when the requirement '!defined(_LIBCPP_VERSION) || _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY' is not met!"
+#     error "__cpp_lib_filesystem should not be defined when the requirement '!defined(_LIBCPP_VERSION) || (!defined(_LIBCPP_HAS_NO_FILESYSTEM) && _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY)' is not met!"
 #   endif
 # endif
 
diff --git a/libcxx/test/std/language.support/support.limits/support.limits.general/fstream.version.compile.pass.cpp b/libcxx/test/std/language.support/support.limits/support.limits.general/fstream.version.compile.pass.cpp
index eab0313..f2c31b6 100644
--- a/libcxx/test/std/language.support/support.limits/support.limits.general/fstream.version.compile.pass.cpp
+++ b/libcxx/test/std/language.support/support.limits/support.limits.general/fstream.version.compile.pass.cpp
@@ -56,11 +56,17 @@
 
 #elif TEST_STD_VER > 23
 
-# ifndef __cpp_lib_fstream_native_handle
-#   error "__cpp_lib_fstream_native_handle should be defined in c++26"
-# endif
-# if __cpp_lib_fstream_native_handle != 202306L
-#   error "__cpp_lib_fstream_native_handle should have the value 202306L in c++26"
+# if !defined(_LIBCPP_VERSION) || (!defined(_LIBCPP_HAS_NO_FILESYSTEM) && !defined(_LIBCPP_HAS_NO_LOCALIZATION))
+#   ifndef __cpp_lib_fstream_native_handle
+#     error "__cpp_lib_fstream_native_handle should be defined in c++26"
+#   endif
+#   if __cpp_lib_fstream_native_handle != 202306L
+#     error "__cpp_lib_fstream_native_handle should have the value 202306L in c++26"
+#   endif
+# else
+#   ifdef __cpp_lib_fstream_native_handle
+#     error "__cpp_lib_fstream_native_handle should not be defined when the requirement '!defined(_LIBCPP_VERSION) || (!defined(_LIBCPP_HAS_NO_FILESYSTEM) && !defined(_LIBCPP_HAS_NO_LOCALIZATION))' is not met!"
+#   endif
 # endif
 
 #endif // TEST_STD_VER > 23
diff --git a/libcxx/test/std/language.support/support.limits/support.limits.general/iomanip.version.compile.pass.cpp b/libcxx/test/std/language.support/support.limits/support.limits.general/iomanip.version.compile.pass.cpp
index b678e68..da9970f 100644
--- a/libcxx/test/std/language.support/support.limits/support.limits.general/iomanip.version.compile.pass.cpp
+++ b/libcxx/test/std/language.support/support.limits/support.limits.general/iomanip.version.compile.pass.cpp
@@ -32,47 +32,77 @@
 
 #elif TEST_STD_VER == 14
 
-# ifndef __cpp_lib_quoted_string_io
-#   error "__cpp_lib_quoted_string_io should be defined in c++14"
-# endif
-# if __cpp_lib_quoted_string_io != 201304L
-#   error "__cpp_lib_quoted_string_io should have the value 201304L in c++14"
+# if !defined(_LIBCPP_VERSION) || !defined(_LIBCPP_HAS_NO_LOCALIZATION)
+#   ifndef __cpp_lib_quoted_string_io
+#     error "__cpp_lib_quoted_string_io should be defined in c++14"
+#   endif
+#   if __cpp_lib_quoted_string_io != 201304L
+#     error "__cpp_lib_quoted_string_io should have the value 201304L in c++14"
+#   endif
+# else
+#   ifdef __cpp_lib_quoted_string_io
+#     error "__cpp_lib_quoted_string_io should not be defined when the requirement '!defined(_LIBCPP_VERSION) || !defined(_LIBCPP_HAS_NO_LOCALIZATION)' is not met!"
+#   endif
 # endif
 
 #elif TEST_STD_VER == 17
 
-# ifndef __cpp_lib_quoted_string_io
-#   error "__cpp_lib_quoted_string_io should be defined in c++17"
-# endif
-# if __cpp_lib_quoted_string_io != 201304L
-#   error "__cpp_lib_quoted_string_io should have the value 201304L in c++17"
+# if !defined(_LIBCPP_VERSION) || !defined(_LIBCPP_HAS_NO_LOCALIZATION)
+#   ifndef __cpp_lib_quoted_string_io
+#     error "__cpp_lib_quoted_string_io should be defined in c++17"
+#   endif
+#   if __cpp_lib_quoted_string_io != 201304L
+#     error "__cpp_lib_quoted_string_io should have the value 201304L in c++17"
+#   endif
+# else
+#   ifdef __cpp_lib_quoted_string_io
+#     error "__cpp_lib_quoted_string_io should not be defined when the requirement '!defined(_LIBCPP_VERSION) || !defined(_LIBCPP_HAS_NO_LOCALIZATION)' is not met!"
+#   endif
 # endif
 
 #elif TEST_STD_VER == 20
 
-# ifndef __cpp_lib_quoted_string_io
-#   error "__cpp_lib_quoted_string_io should be defined in c++20"
-# endif
-# if __cpp_lib_quoted_string_io != 201304L
-#   error "__cpp_lib_quoted_string_io should have the value 201304L in c++20"
+# if !defined(_LIBCPP_VERSION) || !defined(_LIBCPP_HAS_NO_LOCALIZATION)
+#   ifndef __cpp_lib_quoted_string_io
+#     error "__cpp_lib_quoted_string_io should be defined in c++20"
+#   endif
+#   if __cpp_lib_quoted_string_io != 201304L
+#     error "__cpp_lib_quoted_string_io should have the value 201304L in c++20"
+#   endif
+# else
+#   ifdef __cpp_lib_quoted_string_io
+#     error "__cpp_lib_quoted_string_io should not be defined when the requirement '!defined(_LIBCPP_VERSION) || !defined(_LIBCPP_HAS_NO_LOCALIZATION)' is not met!"
+#   endif
 # endif
 
 #elif TEST_STD_VER == 23
 
-# ifndef __cpp_lib_quoted_string_io
-#   error "__cpp_lib_quoted_string_io should be defined in c++23"
-# endif
-# if __cpp_lib_quoted_string_io != 201304L
-#   error "__cpp_lib_quoted_string_io should have the value 201304L in c++23"
+# if !defined(_LIBCPP_VERSION) || !defined(_LIBCPP_HAS_NO_LOCALIZATION)
+#   ifndef __cpp_lib_quoted_string_io
+#     error "__cpp_lib_quoted_string_io should be defined in c++23"
+#   endif
+#   if __cpp_lib_quoted_string_io != 201304L
+#     error "__cpp_lib_quoted_string_io should have the value 201304L in c++23"
+#   endif
+# else
+#   ifdef __cpp_lib_quoted_string_io
+#     error "__cpp_lib_quoted_string_io should not be defined when the requirement '!defined(_LIBCPP_VERSION) || !defined(_LIBCPP_HAS_NO_LOCALIZATION)' is not met!"
+#   endif
 # endif
 
 #elif TEST_STD_VER > 23
 
-# ifndef __cpp_lib_quoted_string_io
-#   error "__cpp_lib_quoted_string_io should be defined in c++26"
-# endif
-# if __cpp_lib_quoted_string_io != 201304L
-#   error "__cpp_lib_quoted_string_io should have the value 201304L in c++26"
+# if !defined(_LIBCPP_VERSION) || !defined(_LIBCPP_HAS_NO_LOCALIZATION)
+#   ifndef __cpp_lib_quoted_string_io
+#     error "__cpp_lib_quoted_string_io should be defined in c++26"
+#   endif
+#   if __cpp_lib_quoted_string_io != 201304L
+#     error "__cpp_lib_quoted_string_io should have the value 201304L in c++26"
+#   endif
+# else
+#   ifdef __cpp_lib_quoted_string_io
+#     error "__cpp_lib_quoted_string_io should not be defined when the requirement '!defined(_LIBCPP_VERSION) || !defined(_LIBCPP_HAS_NO_LOCALIZATION)' is not met!"
+#   endif
 # endif
 
 #endif // TEST_STD_VER > 23
diff --git a/libcxx/test/std/language.support/support.limits/support.limits.general/mutex.version.compile.pass.cpp b/libcxx/test/std/language.support/support.limits/support.limits.general/mutex.version.compile.pass.cpp
index e86239f..0f27997 100644
--- a/libcxx/test/std/language.support/support.limits/support.limits.general/mutex.version.compile.pass.cpp
+++ b/libcxx/test/std/language.support/support.limits/support.limits.general/mutex.version.compile.pass.cpp
@@ -38,38 +38,62 @@
 
 #elif TEST_STD_VER == 17
 
-# ifndef __cpp_lib_scoped_lock
-#   error "__cpp_lib_scoped_lock should be defined in c++17"
-# endif
-# if __cpp_lib_scoped_lock != 201703L
-#   error "__cpp_lib_scoped_lock should have the value 201703L in c++17"
+# if !defined(_LIBCPP_HAS_NO_THREADS)
+#   ifndef __cpp_lib_scoped_lock
+#     error "__cpp_lib_scoped_lock should be defined in c++17"
+#   endif
+#   if __cpp_lib_scoped_lock != 201703L
+#     error "__cpp_lib_scoped_lock should have the value 201703L in c++17"
+#   endif
+# else
+#   ifdef __cpp_lib_scoped_lock
+#     error "__cpp_lib_scoped_lock should not be defined when the requirement '!defined(_LIBCPP_HAS_NO_THREADS)' is not met!"
+#   endif
 # endif
 
 #elif TEST_STD_VER == 20
 
-# ifndef __cpp_lib_scoped_lock
-#   error "__cpp_lib_scoped_lock should be defined in c++20"
-# endif
-# if __cpp_lib_scoped_lock != 201703L
-#   error "__cpp_lib_scoped_lock should have the value 201703L in c++20"
+# if !defined(_LIBCPP_HAS_NO_THREADS)
+#   ifndef __cpp_lib_scoped_lock
+#     error "__cpp_lib_scoped_lock should be defined in c++20"
+#   endif
+#   if __cpp_lib_scoped_lock != 201703L
+#     error "__cpp_lib_scoped_lock should have the value 201703L in c++20"
+#   endif
+# else
+#   ifdef __cpp_lib_scoped_lock
+#     error "__cpp_lib_scoped_lock should not be defined when the requirement '!defined(_LIBCPP_HAS_NO_THREADS)' is not met!"
+#   endif
 # endif
 
 #elif TEST_STD_VER == 23
 
-# ifndef __cpp_lib_scoped_lock
-#   error "__cpp_lib_scoped_lock should be defined in c++23"
-# endif
-# if __cpp_lib_scoped_lock != 201703L
-#   error "__cpp_lib_scoped_lock should have the value 201703L in c++23"
+# if !defined(_LIBCPP_HAS_NO_THREADS)
+#   ifndef __cpp_lib_scoped_lock
+#     error "__cpp_lib_scoped_lock should be defined in c++23"
+#   endif
+#   if __cpp_lib_scoped_lock != 201703L
+#     error "__cpp_lib_scoped_lock should have the value 201703L in c++23"
+#   endif
+# else
+#   ifdef __cpp_lib_scoped_lock
+#     error "__cpp_lib_scoped_lock should not be defined when the requirement '!defined(_LIBCPP_HAS_NO_THREADS)' is not met!"
+#   endif
 # endif
 
 #elif TEST_STD_VER > 23
 
-# ifndef __cpp_lib_scoped_lock
-#   error "__cpp_lib_scoped_lock should be defined in c++26"
-# endif
-# if __cpp_lib_scoped_lock != 201703L
-#   error "__cpp_lib_scoped_lock should have the value 201703L in c++26"
+# if !defined(_LIBCPP_HAS_NO_THREADS)
+#   ifndef __cpp_lib_scoped_lock
+#     error "__cpp_lib_scoped_lock should be defined in c++26"
+#   endif
+#   if __cpp_lib_scoped_lock != 201703L
+#     error "__cpp_lib_scoped_lock should have the value 201703L in c++26"
+#   endif
+# else
+#   ifdef __cpp_lib_scoped_lock
+#     error "__cpp_lib_scoped_lock should not be defined when the requirement '!defined(_LIBCPP_HAS_NO_THREADS)' is not met!"
+#   endif
 # endif
 
 #endif // TEST_STD_VER > 23
diff --git a/libcxx/test/std/language.support/support.limits/support.limits.general/version.version.compile.pass.cpp b/libcxx/test/std/language.support/support.limits/support.limits.general/version.version.compile.pass.cpp
index 29f0ba8..1427130 100644
--- a/libcxx/test/std/language.support/support.limits/support.limits.general/version.version.compile.pass.cpp
+++ b/libcxx/test/std/language.support/support.limits/support.limits.general/version.version.compile.pass.cpp
@@ -1571,11 +1571,17 @@
 #   error "__cpp_lib_print should not be defined before c++23"
 # endif
 
-# ifndef __cpp_lib_quoted_string_io
-#   error "__cpp_lib_quoted_string_io should be defined in c++14"
-# endif
-# if __cpp_lib_quoted_string_io != 201304L
-#   error "__cpp_lib_quoted_string_io should have the value 201304L in c++14"
+# if !defined(_LIBCPP_VERSION) || !defined(_LIBCPP_HAS_NO_LOCALIZATION)
+#   ifndef __cpp_lib_quoted_string_io
+#     error "__cpp_lib_quoted_string_io should be defined in c++14"
+#   endif
+#   if __cpp_lib_quoted_string_io != 201304L
+#     error "__cpp_lib_quoted_string_io should have the value 201304L in c++14"
+#   endif
+# else
+#   ifdef __cpp_lib_quoted_string_io
+#     error "__cpp_lib_quoted_string_io should not be defined when the requirement '!defined(_LIBCPP_VERSION) || !defined(_LIBCPP_HAS_NO_LOCALIZATION)' is not met!"
+#   endif
 # endif
 
 # ifdef __cpp_lib_ranges
@@ -2183,7 +2189,7 @@
 #   error "__cpp_lib_expected should not be defined before c++23"
 # endif
 
-# if !defined(_LIBCPP_VERSION) || _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY
+# if !defined(_LIBCPP_VERSION) || (!defined(_LIBCPP_HAS_NO_FILESYSTEM) && _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY)
 #   ifndef __cpp_lib_filesystem
 #     error "__cpp_lib_filesystem should be defined in c++17"
 #   endif
@@ -2192,7 +2198,7 @@
 #   endif
 # else
 #   ifdef __cpp_lib_filesystem
-#     error "__cpp_lib_filesystem should not be defined when the requirement '!defined(_LIBCPP_VERSION) || _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY' is not met!"
+#     error "__cpp_lib_filesystem should not be defined when the requirement '!defined(_LIBCPP_VERSION) || (!defined(_LIBCPP_HAS_NO_FILESYSTEM) && _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY)' is not met!"
 #   endif
 # endif
 
@@ -2568,11 +2574,17 @@
 #   error "__cpp_lib_print should not be defined before c++23"
 # endif
 
-# ifndef __cpp_lib_quoted_string_io
-#   error "__cpp_lib_quoted_string_io should be defined in c++17"
-# endif
-# if __cpp_lib_quoted_string_io != 201304L
-#   error "__cpp_lib_quoted_string_io should have the value 201304L in c++17"
+# if !defined(_LIBCPP_VERSION) || !defined(_LIBCPP_HAS_NO_LOCALIZATION)
+#   ifndef __cpp_lib_quoted_string_io
+#     error "__cpp_lib_quoted_string_io should be defined in c++17"
+#   endif
+#   if __cpp_lib_quoted_string_io != 201304L
+#     error "__cpp_lib_quoted_string_io should have the value 201304L in c++17"
+#   endif
+# else
+#   ifdef __cpp_lib_quoted_string_io
+#     error "__cpp_lib_quoted_string_io should not be defined when the requirement '!defined(_LIBCPP_VERSION) || !defined(_LIBCPP_HAS_NO_LOCALIZATION)' is not met!"
+#   endif
 # endif
 
 # ifdef __cpp_lib_ranges
@@ -2671,11 +2683,17 @@
 #   error "__cpp_lib_saturation_arithmetic should not be defined before c++26"
 # endif
 
-# ifndef __cpp_lib_scoped_lock
-#   error "__cpp_lib_scoped_lock should be defined in c++17"
-# endif
-# if __cpp_lib_scoped_lock != 201703L
-#   error "__cpp_lib_scoped_lock should have the value 201703L in c++17"
+# if !defined(_LIBCPP_HAS_NO_THREADS)
+#   ifndef __cpp_lib_scoped_lock
+#     error "__cpp_lib_scoped_lock should be defined in c++17"
+#   endif
+#   if __cpp_lib_scoped_lock != 201703L
+#     error "__cpp_lib_scoped_lock should have the value 201703L in c++17"
+#   endif
+# else
+#   ifdef __cpp_lib_scoped_lock
+#     error "__cpp_lib_scoped_lock should not be defined when the requirement '!defined(_LIBCPP_HAS_NO_THREADS)' is not met!"
+#   endif
 # endif
 
 # ifdef __cpp_lib_semaphore
@@ -3366,7 +3384,7 @@
 #   error "__cpp_lib_expected should not be defined before c++23"
 # endif
 
-# if !defined(_LIBCPP_VERSION) || _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY
+# if !defined(_LIBCPP_VERSION) || (!defined(_LIBCPP_HAS_NO_FILESYSTEM) && _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY)
 #   ifndef __cpp_lib_filesystem
 #     error "__cpp_lib_filesystem should be defined in c++20"
 #   endif
@@ -3375,7 +3393,7 @@
 #   endif
 # else
 #   ifdef __cpp_lib_filesystem
-#     error "__cpp_lib_filesystem should not be defined when the requirement '!defined(_LIBCPP_VERSION) || _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY' is not met!"
+#     error "__cpp_lib_filesystem should not be defined when the requirement '!defined(_LIBCPP_VERSION) || (!defined(_LIBCPP_HAS_NO_FILESYSTEM) && _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY)' is not met!"
 #   endif
 # endif
 
@@ -3835,11 +3853,17 @@
 #   error "__cpp_lib_print should not be defined before c++23"
 # endif
 
-# ifndef __cpp_lib_quoted_string_io
-#   error "__cpp_lib_quoted_string_io should be defined in c++20"
-# endif
-# if __cpp_lib_quoted_string_io != 201304L
-#   error "__cpp_lib_quoted_string_io should have the value 201304L in c++20"
+# if !defined(_LIBCPP_VERSION) || !defined(_LIBCPP_HAS_NO_LOCALIZATION)
+#   ifndef __cpp_lib_quoted_string_io
+#     error "__cpp_lib_quoted_string_io should be defined in c++20"
+#   endif
+#   if __cpp_lib_quoted_string_io != 201304L
+#     error "__cpp_lib_quoted_string_io should have the value 201304L in c++20"
+#   endif
+# else
+#   ifdef __cpp_lib_quoted_string_io
+#     error "__cpp_lib_quoted_string_io should not be defined when the requirement '!defined(_LIBCPP_VERSION) || !defined(_LIBCPP_HAS_NO_LOCALIZATION)' is not met!"
+#   endif
 # endif
 
 # ifndef __cpp_lib_ranges
@@ -3944,11 +3968,17 @@
 #   error "__cpp_lib_saturation_arithmetic should not be defined before c++26"
 # endif
 
-# ifndef __cpp_lib_scoped_lock
-#   error "__cpp_lib_scoped_lock should be defined in c++20"
-# endif
-# if __cpp_lib_scoped_lock != 201703L
-#   error "__cpp_lib_scoped_lock should have the value 201703L in c++20"
+# if !defined(_LIBCPP_HAS_NO_THREADS)
+#   ifndef __cpp_lib_scoped_lock
+#     error "__cpp_lib_scoped_lock should be defined in c++20"
+#   endif
+#   if __cpp_lib_scoped_lock != 201703L
+#     error "__cpp_lib_scoped_lock should have the value 201703L in c++20"
+#   endif
+# else
+#   ifdef __cpp_lib_scoped_lock
+#     error "__cpp_lib_scoped_lock should not be defined when the requirement '!defined(_LIBCPP_HAS_NO_THREADS)' is not met!"
+#   endif
 # endif
 
 # if !defined(_LIBCPP_HAS_NO_THREADS) && (!defined(_LIBCPP_VERSION) || _LIBCPP_AVAILABILITY_HAS_SYNC)
@@ -4750,7 +4780,7 @@
 #   error "__cpp_lib_expected should have the value 202211L in c++23"
 # endif
 
-# if !defined(_LIBCPP_VERSION) || _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY
+# if !defined(_LIBCPP_VERSION) || (!defined(_LIBCPP_HAS_NO_FILESYSTEM) && _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY)
 #   ifndef __cpp_lib_filesystem
 #     error "__cpp_lib_filesystem should be defined in c++23"
 #   endif
@@ -4759,7 +4789,7 @@
 #   endif
 # else
 #   ifdef __cpp_lib_filesystem
-#     error "__cpp_lib_filesystem should not be defined when the requirement '!defined(_LIBCPP_VERSION) || _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY' is not met!"
+#     error "__cpp_lib_filesystem should not be defined when the requirement '!defined(_LIBCPP_VERSION) || (!defined(_LIBCPP_HAS_NO_FILESYSTEM) && _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY)' is not met!"
 #   endif
 # endif
 
@@ -5267,11 +5297,17 @@
 #   error "__cpp_lib_print should have the value 202207L in c++23"
 # endif
 
-# ifndef __cpp_lib_quoted_string_io
-#   error "__cpp_lib_quoted_string_io should be defined in c++23"
-# endif
-# if __cpp_lib_quoted_string_io != 201304L
-#   error "__cpp_lib_quoted_string_io should have the value 201304L in c++23"
+# if !defined(_LIBCPP_VERSION) || !defined(_LIBCPP_HAS_NO_LOCALIZATION)
+#   ifndef __cpp_lib_quoted_string_io
+#     error "__cpp_lib_quoted_string_io should be defined in c++23"
+#   endif
+#   if __cpp_lib_quoted_string_io != 201304L
+#     error "__cpp_lib_quoted_string_io should have the value 201304L in c++23"
+#   endif
+# else
+#   ifdef __cpp_lib_quoted_string_io
+#     error "__cpp_lib_quoted_string_io should not be defined when the requirement '!defined(_LIBCPP_VERSION) || !defined(_LIBCPP_HAS_NO_LOCALIZATION)' is not met!"
+#   endif
 # endif
 
 # ifndef __cpp_lib_ranges
@@ -5460,11 +5496,17 @@
 #   error "__cpp_lib_saturation_arithmetic should not be defined before c++26"
 # endif
 
-# ifndef __cpp_lib_scoped_lock
-#   error "__cpp_lib_scoped_lock should be defined in c++23"
-# endif
-# if __cpp_lib_scoped_lock != 201703L
-#   error "__cpp_lib_scoped_lock should have the value 201703L in c++23"
+# if !defined(_LIBCPP_HAS_NO_THREADS)
+#   ifndef __cpp_lib_scoped_lock
+#     error "__cpp_lib_scoped_lock should be defined in c++23"
+#   endif
+#   if __cpp_lib_scoped_lock != 201703L
+#     error "__cpp_lib_scoped_lock should have the value 201703L in c++23"
+#   endif
+# else
+#   ifdef __cpp_lib_scoped_lock
+#     error "__cpp_lib_scoped_lock should not be defined when the requirement '!defined(_LIBCPP_HAS_NO_THREADS)' is not met!"
+#   endif
 # endif
 
 # if !defined(_LIBCPP_HAS_NO_THREADS) && (!defined(_LIBCPP_VERSION) || _LIBCPP_AVAILABILITY_HAS_SYNC)
@@ -6347,7 +6389,7 @@
 #   error "__cpp_lib_expected should have the value 202211L in c++26"
 # endif
 
-# if !defined(_LIBCPP_VERSION) || _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY
+# if !defined(_LIBCPP_VERSION) || (!defined(_LIBCPP_HAS_NO_FILESYSTEM) && _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY)
 #   ifndef __cpp_lib_filesystem
 #     error "__cpp_lib_filesystem should be defined in c++26"
 #   endif
@@ -6356,7 +6398,7 @@
 #   endif
 # else
 #   ifdef __cpp_lib_filesystem
-#     error "__cpp_lib_filesystem should not be defined when the requirement '!defined(_LIBCPP_VERSION) || _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY' is not met!"
+#     error "__cpp_lib_filesystem should not be defined when the requirement '!defined(_LIBCPP_VERSION) || (!defined(_LIBCPP_HAS_NO_FILESYSTEM) && _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY)' is not met!"
 #   endif
 # endif
 
@@ -6511,11 +6553,17 @@
 #   endif
 # endif
 
-# ifndef __cpp_lib_fstream_native_handle
-#   error "__cpp_lib_fstream_native_handle should be defined in c++26"
-# endif
-# if __cpp_lib_fstream_native_handle != 202306L
-#   error "__cpp_lib_fstream_native_handle should have the value 202306L in c++26"
+# if !defined(_LIBCPP_VERSION) || (!defined(_LIBCPP_HAS_NO_FILESYSTEM) && !defined(_LIBCPP_HAS_NO_LOCALIZATION))
+#   ifndef __cpp_lib_fstream_native_handle
+#     error "__cpp_lib_fstream_native_handle should be defined in c++26"
+#   endif
+#   if __cpp_lib_fstream_native_handle != 202306L
+#     error "__cpp_lib_fstream_native_handle should have the value 202306L in c++26"
+#   endif
+# else
+#   ifdef __cpp_lib_fstream_native_handle
+#     error "__cpp_lib_fstream_native_handle should not be defined when the requirement '!defined(_LIBCPP_VERSION) || (!defined(_LIBCPP_HAS_NO_FILESYSTEM) && !defined(_LIBCPP_HAS_NO_LOCALIZATION))' is not met!"
+#   endif
 # endif
 
 # if !defined(_LIBCPP_VERSION)
@@ -6966,11 +7014,17 @@
 #   error "__cpp_lib_print should have the value 202207L in c++26"
 # endif
 
-# ifndef __cpp_lib_quoted_string_io
-#   error "__cpp_lib_quoted_string_io should be defined in c++26"
-# endif
-# if __cpp_lib_quoted_string_io != 201304L
-#   error "__cpp_lib_quoted_string_io should have the value 201304L in c++26"
+# if !defined(_LIBCPP_VERSION) || !defined(_LIBCPP_HAS_NO_LOCALIZATION)
+#   ifndef __cpp_lib_quoted_string_io
+#     error "__cpp_lib_quoted_string_io should be defined in c++26"
+#   endif
+#   if __cpp_lib_quoted_string_io != 201304L
+#     error "__cpp_lib_quoted_string_io should have the value 201304L in c++26"
+#   endif
+# else
+#   ifdef __cpp_lib_quoted_string_io
+#     error "__cpp_lib_quoted_string_io should not be defined when the requirement '!defined(_LIBCPP_VERSION) || !defined(_LIBCPP_HAS_NO_LOCALIZATION)' is not met!"
+#   endif
 # endif
 
 # ifndef __cpp_lib_ranges
@@ -7174,11 +7228,17 @@
 #   error "__cpp_lib_saturation_arithmetic should have the value 202311L in c++26"
 # endif
 
-# ifndef __cpp_lib_scoped_lock
-#   error "__cpp_lib_scoped_lock should be defined in c++26"
-# endif
-# if __cpp_lib_scoped_lock != 201703L
-#   error "__cpp_lib_scoped_lock should have the value 201703L in c++26"
+# if !defined(_LIBCPP_HAS_NO_THREADS)
+#   ifndef __cpp_lib_scoped_lock
+#     error "__cpp_lib_scoped_lock should be defined in c++26"
+#   endif
+#   if __cpp_lib_scoped_lock != 201703L
+#     error "__cpp_lib_scoped_lock should have the value 201703L in c++26"
+#   endif
+# else
+#   ifdef __cpp_lib_scoped_lock
+#     error "__cpp_lib_scoped_lock should not be defined when the requirement '!defined(_LIBCPP_HAS_NO_THREADS)' is not met!"
+#   endif
 # endif
 
 # if !defined(_LIBCPP_HAS_NO_THREADS) && (!defined(_LIBCPP_VERSION) || _LIBCPP_AVAILABILITY_HAS_SYNC)
diff --git a/libcxx/utils/generate_feature_test_macro_components.py b/libcxx/utils/generate_feature_test_macro_components.py
index 6078e81..cc1fc50 100755
--- a/libcxx/utils/generate_feature_test_macro_components.py
+++ b/libcxx/utils/generate_feature_test_macro_components.py
@@ -455,8 +455,8 @@ feature_test_macros = [
             "name": "__cpp_lib_filesystem",
             "values": {"c++17": 201703},
             "headers": ["filesystem"],
-            "test_suite_guard": "!defined(_LIBCPP_VERSION) || _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY",
-            "libcxx_guard": "_LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY",
+            "test_suite_guard": "!defined(_LIBCPP_VERSION) || (!defined(_LIBCPP_HAS_NO_FILESYSTEM) && _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY)",
+            "libcxx_guard": "!defined(_LIBCPP_HAS_NO_FILESYSTEM) && _LIBCPP_AVAILABILITY_HAS_FILESYSTEM_LIBRARY",
         },
         {
             "name": "__cpp_lib_format",
@@ -570,6 +570,8 @@ feature_test_macros = [
             "name": "__cpp_lib_fstream_native_handle",
             "values": {"c++26": 202306},  # P1759R6 Native handles and file streams
             "headers": ["fstream"],
+            "test_suite_guard": "!defined(_LIBCPP_VERSION) || (!defined(_LIBCPP_HAS_NO_FILESYSTEM) && !defined(_LIBCPP_HAS_NO_LOCALIZATION))",
+            "libcxx_guard": "!defined(_LIBCPP_HAS_NO_FILESYSTEM) && !defined(_LIBCPP_HAS_NO_LOCALIZATION)",
         },
         {
             "name": "__cpp_lib_function_ref",
@@ -879,6 +881,8 @@ feature_test_macros = [
             "name": "__cpp_lib_quoted_string_io",
             "values": {"c++14": 201304},
             "headers": ["iomanip"],
+            "test_suite_guard": "!defined(_LIBCPP_VERSION) || !defined(_LIBCPP_HAS_NO_LOCALIZATION)",
+            "libcxx_guard": "!defined(_LIBCPP_HAS_NO_LOCALIZATION)",
         },
         {
             "name": "__cpp_lib_ranges",
@@ -1016,6 +1020,8 @@ feature_test_macros = [
             "name": "__cpp_lib_scoped_lock",
             "values": {"c++17": 201703},
             "headers": ["mutex"],
+            "test_suite_guard": "!defined(_LIBCPP_HAS_NO_THREADS)",
+            "libcxx_guard": "!defined(_LIBCPP_HAS_NO_THREADS)",
         },
         {
             "name": "__cpp_lib_semaphore",